<PAGE>

                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 205249

                                   ----------

                                   FORM 10-QSB

[X]  Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange
     Act of 1934 for the Quarterly Period Ended March 31, 2003.

[_]  Transition Report Pursuant to Section 13 or 15(d) of the Securities
     Exchange Act of 1934 for the Transition Period from _________ to _________.

                        Commission File Number 000-27592

                             TECH LABORATORIES, INC.
              (Exact name of Small Business issuer in its charter)

              New Jersey                                 22-1436279
----------------------------------------    ------------------------------------
    (State or other jurisdiction of         (I.R.S. Employer Identification No.)
     incorporation or organization)

 955 Belmont Avenue, North Haledon, NJ                      07508
----------------------------------------    ------------------------------------
(Address of principal executive offices)                 (zip code)

       Registrant's telephone number, including area code: (973) 427-5333

Indicate by check mark whether the Registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the Registrant was
required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days.

                                 Yes [X] No [_]

     The number of shares of Common Stock, par value $.01 per share, outstanding
as of the latest practicable date: As of May 19, 2003, there were 5,522,416
shares outstanding.

<PAGE>

                             Tech Laboratories, Inc.

                                   FORM 10-QSB

                                Table of Contents

<TABLE>
<CAPTION>

<S>                                                                                                              <C>
PART I FINANCIAL INFORMATION..................................................................................... 1

Item 1.  Financial Statements...................................................................................  1
         March 31, 2002 and 2003 Balance Sheet (unaudited)......................................................  1
         Statement of Operations March 31, 2002 and 2003 (unaudited)............................................  3
         Statements of Cash Flow March 31, 2002 and 2003 (unaudited)............................................  4
         Notes to Financial Statements..........................................................................  5

Item 2.  Management's Discussion and Analysis of Financial Condition and Results of Operations..................  8
Item 3.  Controls and Procedures  .............................................................................   9

PART II.  OTHER INFORMATION.....................................................................................  9
Item 6.  Exhibits and Reports on Form 8-K.......................................................................  9

SIGNATURES.....................................................................................................  10
</TABLE>

<PAGE>

                          PART I. FINANCIAL INFORMATION

Item 1.  Financial Statements.

                             TECH LABORATORIES, INC.
                             March 31, 2002 and 2003
                                  Balance Sheet

                                   (unaudited)

                                     ASSETS

<TABLE>
<CAPTION>
                                                                                    2002                  2003
                                                                                    ----                  ----
<S>                                                                             <C>                    <C>
Current Assets:
  Cash                                                                          $  476,012             $   85,038
  Marketable Securities                                                             40,000                 40,000
  Accounts Receivable, Net of
       Allowance for Doubtful Accounts of $25,000                                  155,789                 28,887
  Inventories                                                                    2,243,180              1,655,386
  Prepaid Expenses                                                                   6,303                  6,303
                                                                                ----------            -----------

                 Total Current Assets                                           $2,921,284             $1,815,614
                                                                                ----------             ----------

Property, Plant, and Equipment, at Cost
  Leasehold Improvements                                                             2,247                  2,247
  Machinery, Equipment, and Instruments                                            524,730                607,987
  Furniture and Fixtures                                                            97,090                105,287
                                                                                 ---------               --------

                 Total Property, Plant, and Equipment                              624,067                715,521
Less:  Accumulated Depreciation & Amortization                                    (379,590)              (414,248)
                                                                                ----------             ----------

                 Net Property, Plant, and Equipment                             $  244,477             $  301,273
                                                                                ----------             ----------

Other Assets                                                                    $   12,059             $   12,059
                                                                                ----------             ----------

                 Total Assets                                                   $3,177,820             $2,128,946
                                                                                ==========             ==========
</TABLE>

   The accompanying notes are an integral part of these financial statements.


                                       1
<PAGE>

                             TECH LABORATORIES, INC.
                             March 31, 2002 and 2003
                                  Balance Sheet

                                   (unaudited)

                    LIABILITIES AND STOCKHOLDERS' INVESTMENTS

<TABLE>
<CAPTION>
                                                                                    2002                  2003
                                                                                    ----                  ----
<S>                                                                             <C>                    <C>
Current Liabilities:
  Defaulted Convertible Notes                                                     $ 1,165,375          $1,170,181
  Current Portion of Long-Term Debt                                                    33,074              29,751
  Short-Term Loans Payable                                                             53,427              54,827
  Accounts Payable and Accrued Expenses                                                85,500             135,644
  Other Liabilities                                                                     2,234              67,425
                                                                                  -----------         -----------

                 Total Current Liabilities                                        $ 1,339,610         $ 1,460,828
                                                                                  -----------         -----------

Stockholders' Investment:
  Common Stock, $.01 Par Value; 25,000,000 Shares Authorized:
       5,143,530 shares outstanding in 2002, 5,522,415
       outstanding in 2003                                                        $    47,836         $    49,848
  Less:  15,191 Shares Reacquired and Held in Treasury                                  (113)               (113)
                                                                                  -----------         -----------

                                                                                  $    47,723         $    49,735
                                                                                  -----------         -----------

  Capital Contributed in Excess of Par Value                                      $ 4,339,478         $ 4,480,381
  Retained Earnings/(Accum. Deficit)                                              (2,548,991)         (3,861,998)
                                                                                  -----------         -----------
                                                                                   $1,790,387         $   618,353
                                                                                  -----------         -----------

                 Total Liabilities and Stockholders' Equity                       $ 3,177,820         $ 2,128,946
                                                                                  ===========         ===========
</TABLE>

   The accompanying notes are an integral part of these financial statements.


                                       2
<PAGE>

                             TECH LABORATORIES, INC.
                             Statement of Operations
                             March 31, 2002 and 2003

                                   (unaudited)

<TABLE>
<CAPTION>
                                                                                       2002              2003
                                                                                       ----              ----

<S>                                                                               <C>                 <C>
Sales                                                                             $   122,830         $    94,327
                                                                                  -----------         -----------

Costs and Expenses:
  Cost of Sales                                                                        82,296              58,165
  Selling, General, and Administrative Expense                                        164,662              62,702
                                                                                  -----------         -----------

                                                                                      246,958             120,867
                                                                                  -----------         -----------

Income/(Loss) from Operations                                                     $  (124,128)        $   (26,540)

Other Income (Expenses):                                                              (18,321)            (18,306)

Income/(Loss) Before Income Taxes                                                 $  (142,449)        $   (44,846)
Provision for Income Taxes                                                                -0-                 -0-
                                                                                  -----------         -----------

Net Income/(Loss)                                                                 $  (142,449)        $   (44,846)

Retained Earnings/(Accum. Deficit), Beg. Qtr.                                      (2,406,542)         (3,817,152)
                                                                                  -----------         -----------

Retained Earnings/(Accum. Deficit), End. Qtr.                                     $(2,548,991)        $(3,861,998)
                                                                                  -----------         -----------

Earnings Per Share                                                                    $(0.03)             $(0.01)
                                                                                  ===========         ===========
</TABLE>


                                       3
<PAGE>

                             TECH LABORATORIES, INC.

                             Statements of Cash Flow
                             March 31, 2002 and 2003

                                   (unaudited)

<TABLE>
<CAPTION>
                                                                                    2002                 2003*
                                                                                 ----------           -----------
<S>                                                                             <C>                   <C>
Cash Flow From (For) Operating Activities:
  Net Income/(Loss) From Operations                                             $  (142,449)          $(44,846)

  Add/(Deduct) Items Not Affecting Cash:
                 Depreciation                                                         7,837              7,900
                 Amortization                                                           -0-                -0-

  Changes in Operating Assets and Liabilities
     Marketable Securities                                                              -0-                -0-
     Accounts Receivable                                                            (43,589)           (22,743)
     Inventories                                                                   (167,701)            80,247
     Prepaid Expenses                                                                   -0-                -0-
     Accounts Payable and Accrued Expenses                                            3,276              3,271
     Other Assets/Liabilities                                                       (18,110)            28,943
                                                                                -----------           --------

Net Cash Flow From (For) Operating Activities                                     (360,736)             52,772
                                                                                -----------           --------

Cash Flows From (For) Investing Activities                                           (1,428)             3,923

Cash Flow From (For) Financing Activities:

  Defaulted Convertible Notes - repayment                                           (53,827)               -0-
  Issuance of Common Stock                                                              -0-                -0-
                                                                                -----------           --------

Net Cash Flow From (For) Financing Activities                                       (53,827)               -0-
                                                                                -----------           --------

Net Increase/(Decrease) in Cash                                                    (415,991)            56,695
Cash Balance Beginning of Year                                                      892,003             28,343
                                                                                -----------           --------

Cash Balance End of First Quarter                                               $   476,012           $ 85,038
                                                                                -----------           --------

</TABLE>

*    As of March 31, 2003, an aggregate of $373,730 of Convertible Long-Term
     Debt was converted into Common Stock.


                                       4
<PAGE>

                             TECH LABORATORIES, INC.

                          Notes to Financial Statements
                      For the Quarter Ended March 31, 2003
                                   (unaudited)

(1) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:

     CASH - Includes Tech Labs' checking account at Hudson United Bank plus a
Demand Money Market Account at Prudential Securities and Bear Stearns.

     REVENUE RECOGNITION - Tech Labs recognizes all revenues when orders are
shipped.

     ACCOUNTS RECEIVABLE - Tech Labs recognizes sales when orders are shipped to
customers. The allowance for bad debts is accrued based on a review of customer
accounts receivables aging.

     INVENTORIES - Inventories are valued at cost or market, whichever is lower.
The FIFO cost method is generally used to determine the cost of the inventories.
At December 31, 2001 and 2002, physical inventories were taken and tested. No
physical inventory was taken at March 31, 2003.

     PROPERTY AND DEPRECIATION - Additions to property and equipment are
recorded at cost. Depreciation is computed using the straight-line method over
the estimated useful lives of the assets as follows:

<TABLE>
<CAPTION>
          Assets                          Estimated Useful Lives
          ------                          ----------------------
<S>                                          <C>
          Machinery                          5 to 7 years
          Furniture & Fixtures               5 to 7 years
</TABLE>

Maintenance and repairs are charged to expense as incurred. The cost of
betterments is capitalized and depreciated at appropriate rates. Upon retirement
or other disposition of property items, cost, and accumulated depreciations are
removed from the accounts and any gain or loss is reflected in the statement of
income.

     INCOME TAXES - Income tax expense is based on reported income and deferred
tax credit is provided for temporary differences between book and taxable
income.

     MARKETABLE SECURITIES - The marketable securities are a time deposit at
Hudson United Bank. The amount of this deposit was $40,000 as of December 31,
2002 and March 31, 2003.

(2) INVENTORIES:

Inventories at December 31, 2001 and 2002 were as follows:
<TABLE>
<CAPTION>

                                                                                                 Three Months
                                                                                                     Ended
                                                                 2001               2002        March 31, 2003
                                                                 ----               ----        --------------
<S>                                                           <C>                <C>              <C>
Raw Materials & Finished Components                           $  993,666         $  676,996       $  554,683
Work in Process & Finished Goods                              $1,081,813         $1,058,651       $1,100,703
                                                              ----------         ----------       ----------
                                                              $2,075,479         $1,735,633       $1,655,386
                                                              ----------         ----------       ----------
</TABLE>


                                       5
<PAGE>

(3) INCOME/(LOSS) PER SHARE:

     Pursuant to the provisions of SFAS No. 128, "Earnings Per Share," the Net
Income/(Loss) per share was calculated on the weighted average number of shares
outstanding during the year ended December 31, 2001, for the year ended December
31, 2002, and for the first quarter of 2003.

         Fully Diluted Earnings per share would be based on the assumed
conversion of all convertible notes. However, these notes are anti-dilutive and
have been excluded. The assumed conversion of all outstanding options and
warrants were also excluded due to anti-dilution.
<TABLE>
<CAPTION>
                                                                                               Three Months ended
                                                                2001              2002           March 31, 2003
                                                                ----              ----           --------------
<S>                                                         <C>               <C>                  <C>
Net Income for the Computation of Basic EPS                 (1,026,432)       (1,241,660)            (44,846)
                                                            ==========        ==========             =======
Shares for Computation of Basic EPS                          4,562,832         5,156,679           5,156,679
                                                             =========         =========           =========
</TABLE>


(4) INCOME TAXES:

     At December 31, 2002, the balance of operating loss carryforward was
$4,391,733, and at March 31, 2003, the operating loss carryforward was
$4,436,579, which can be utilized to offset future taxable income. These
operating loss carry-forwards begin to expire in 2014.

(5) CURRENT PORTION OF LONG-TERM DEBT:

     Loans payable to banks were as follows for the years indicated:

<TABLE>
<CAPTION>
                                                                              CURRENT          NON-CURRENT
YEAR ENDED             PAYEE                         INTEREST RATE            AMOUNT             AMOUNT
----------             -----                         -------------            ------             ------
<S>                    <C>                           <C>                      <C>              <C>
2001                   Hudson United Bank            Prime +1.5%              $33,347
2002                   Hudson United Bank            Prime +1.5%              $31,713
March 31, 2003         Hudson United Bank            Prime +1.5%              $31,347
</TABLE>

This loan was negotiated in 1995 at an original amount of $35,000 and fluctuated
to a maximum of $35,000.

Marketable Securities are pledged as collateral on the above loans.

(6) SHORT-TERM LOANS PAYABLE:

     Demand loans payable include loans from third parties. The outstanding loan
balances due as of December 31, 2002 was $56,815 and $54,827 as of March 31,
2003, which includes accrued interest for all years. The annual interest rate
for these loans ranges between six (6%) percent and ten (10%) percent. In
October of 1999, three short-term loans for a total of $200,000 at ten percent
(10%) annual interest were completed. Certain contractual revenues were pledged
to secure these loans. As of December 31, 2000, $150,000 of such loans were
repaid. The remaining $50,000 is outstanding and was due by December 31, 2002,
and is now in default.


                                       6
<PAGE>

(7) COMMON STOCK:

     In 1999, Tech Labs filed a registration statement on Form SB-2 with the
Securities and Exchange Commission. The registration statement was declared
effective on February 3, 2000. The offering was completed on May 3, 2000 for
total proceeds of $2,273,723.

(8) COMMITMENTS AND CONTINGENCIES:

     In 1997 Tech Labs entered into an exclusive agreement with Elektronik
Apparatebau (EAG), FUA Safety Equipment and Double T Sports LTD. whereby it
received exclusive rights to manufacture and market IDS products until September
30, 2007 in the US, Canada, and South America. Gross profits will be calculated
according to GAAP and distributed quarterly 70% to Tech Labs and 30% to FUA
until March 2001. Thereafter, until 2007 quarterly distribution will be based on
pretax profits in excess of 16% being shared 70% to Tech Labs and 30% to FUA. In
addition, FUA will receive a 5% royalty based on the cost of any IDS products
Tech Labs manufactures and sells. Since 1997, sales and distributions to FUA
have been $1.4 million and $198,200. $13,000 of distributions are still owed.

(9) LONG-TERM CONVERTIBLE DEBT:

     On October 13, 2000, Tech Labs completed a $1.5 million dollar financing of
6.5% convertible promissory notes due October 15, 2002. Interest is payable
quarterly in cash or in shares of common stock at the option of the noteholders.
Tech Labs disclosed all terms of this financing on Form 8-K filed on October 18,
2000. As of March 31, 2003, $373,730 of principal on the 6.5% convertible notes
has been converted into shares of Tech Labs' common stock.

(10) On January 11, 2002, Tech Labs entered into a conversion and redemption
agreement concerning the Long-term Debt referenced in Note (9). An Event of
Default, as defined in the 6.5% convertible notes, occurred on January 25, 2002,
when Tech Labs was unable to make the first payment of $750,000 to the holders
of the notes.

     On April 19, 2002, Tech Labs successfully negotiated a cure of the default
referenced above. This cure required that Tech Labs' registration statement,
filed with the Securities and Exchange Commission on April 5, 2002, covering the
shares underlying the 6.5% convertible notes, to have been declared effective on
or before June 29, 2002. If the registration statement was declared effective by
such date and Tech Labs made certain payments described in Tech Labs' report on
Form 8-K filed April 25, 2002, the maturity date of the 6.5% convertible notes
would have been extended from October 13, 2002 to December 30, 2002.

     On August 2, 2002, the Company announced that an Event of Default occurred
on the 6.5% convertible notes. The Company was unable to have its registration
statement declared effective by June 29, 2002, and was unable to reach a new
agreement with the holders of the 6.5% convertible notes prior to the expiration
of the waiver the Company had been granted by the holders of the notes, which
had been granted in order to permit the parties time to negotiate a new
agreement. The Company continues to seek a cure for the default with the holders
of the 6.5% convertible notes.

(11) GOING CONCERN:

     As a result of operating losses and negative cash flows experienced during
2001 and 2002, Tech Labs has a tenuous liquidity position. If sales do not
improve or alternate financing is not obtained,



                                       7
<PAGE>

substantial doubt exists about Tech Labs' ability to continue as a going
concern.

(12) PRIOR PERIOD ADJUSTMENT:

     Over the course of 2001, Tech Labs issued and distributed 170,000 shares of
common stock to Mr. Barry Bendett pursuant to the terms of a consulting
agreement the Company entered into with Mr. Bendett on November 13, 2002.
Valuing these shares at their market value on their respective dates of issuance
and distribution. Tech Labs should have expensed $168,950. This compensation was
never expensed. This error is corrected as follows:

<TABLE>
<CAPTION>

FULL YEAR 2001
--------------

<S>                                                                             <C>
Closing Balance retained Earnings as reported                                   $(2,406,542)
Adjustment referenced above                                                     $(168,950)
                                                                                -----------

Revised December 31, 2001, Closing Balance of Retained Earnings                 $(2,575,492)

Net Loss - 2002
                                                                                $(1,241,660)

                                                                                -----------
December 31, 2002, Retained Earnings after prior period Adjustment              $(3,817,152)

                                                                                -----------
</TABLE>

(13) SUBSEQUENT EVENT:

     The Company signed a promissory note in the principal amount of $12,000,
dated April 8, 2003, which was due May 8, 2003 and is presently outstanding and
in default.

Item 2. Management's Discussion and Analysis of Financial Condition and Results
        of Operations.

     The information contained in this section should be read in conjunction
with the Consolidated Financial Statements and Notes thereto appearing in this
report Form 10-QSB and the Company's Annual Report for the year ended December
31, 2002.

    Quarter ending March 31, 2003, compared to Quarter ending March 31, 2002.
    -------------------------------------------------------------------------

     Sales were $94,327 for the first quarter of 2003 as compared to $122,830
for the similar period of 2002. This decrease was due to the continuing effects
of the economic downturn.

     Cost of sales of $58,165 for the first quarter of 2003 has been decreased
by $24,131 compared to the same period of 2002, primarily due to the sales
decline.

     Selling, administrative, and general expenses decreased by $101,960
compared to the same period of 2002 due to reductions in marketing, sales, and
administrative expense necessitated by sales reductions.

     Loss from operations of ($26,540) improved $97,588 compared to a loss of
($124,128) for the prior period as a direct result of cost reductions.

    Quarter ending March 31, 2003, compared to year ending December 31, 2002.
    -------------------------------------------------------------------------


                                       8
<PAGE>

SIGNIFICANT CHANGES

     During the first quarter of 2003, the Company is still suffering from the
economic downturn.

     Cash Flow for the first quarter of 2003 was a positive $56,695 as a result
of the reductions in current assets necessitated by the continuing economic
downturn in the telecommunications industry.

LIQUIDITY AND CAPITAL RESOURCES

     The Company's operating activities generated cash of $52,772 during the
three months ended March 31, 2003, as compared to utilizing cash of ($360,736)
during the three months ended March 31, 2002.

     As a result of operating losses and negative cash flow experienced during
2002, Tech Labs has a tenuous liquidity position. If sales do not improve or
alternative financing is not obtained, substantial doubt exists about Tech Labs'
ability to continue as a going concern.

Item 3. Controls and Procedures

As of March 31, 2003, an evaluation was performed under the supervision and with
the participation of our management, including our Chief Executive Officer, of
the effectiveness of the design and operation of our disclosure controls and
procedures. Based on that evaluation, our management, including our Chief
Executive Officer, concluded that our disclosure controls and procedures were
effective as of March 31, 2003. There have been no significant changes in our
internal controls or in other factors that could significantly affect internal
controls subsequent to March 31, 2003.

                           PART II. OTHER INFORMATION

Item 6. Exhibits and Reports on Form 8-K.

(a) Exhibits

     99.1 Certification of the Chief Executive and Chief Financial Officer of
the Company pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

(b) Reports on form 8-K.

     None.


                                       9
<PAGE>

                             TECH LABORATORIES, INC.

                                   SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

Date: May 20, 2003

                                TECH LABORATORIES, INC.

                                By: /s/ Bernard M. Ciongoli
                                    ----------------------------------------
                                    Bernard M. Ciongoli
                                    Chief Executive Officer, Principal Financial
                                    Officer and Chief Accounting Officer)

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

     I, Bernard M. Ciongoli, President, Chief Executive Officer, and Chief
Financial Officer of Tech Laboratories, Inc. certify that:

     1.   I have reviewed this quarterly report on Form 10-Q for the Tech
          Laboratories, Inc.;

     2.   Based on my knowledge, this quarterly report does not contain any
          untrue statement of a material fact or omit to state a material fact
          necessary to make the statements made, in light of the circumstances
          under which such statements were made, not misleading with respect to
          the period covered by this quarterly report.

     3.   Based on my knowledge, the financial statements and other financial
          information included in this quarterly report, fairly present in all
          material respects the financial condition, results of operation, and
          cash flows of the registrant as of, and for, the periods presented in
          this quarterly report.

     4.   The registrant's other certifying officers and I are responsible for
          establishing and maintaining disclosure controls and procedures (as
          defined in Exchange Act Rules 13a-14 and 15d-14) for the registrant
          and we have:

          (a)  designed such disclosure controls and procedures to ensure that
               material information relating to the registrant, including its
               consolidated subsidiaries, is made known to us by others within
               those entities, particularly during the period in which this
               quarterly report is being prepared;



                                       10
<PAGE>

          (b)  evaluated the effectiveness of the registrant's disclosure
               controls and procedures as of a date within 90 days prior to the
               filing date of this quarterly report (the "Evaluation Date"); and

          (c)  presented in this quarterly report our conclusions about the
               effectiveness of the disclosure controls and procedures based on
               our evaluation as of the Evaluation Date.

     5.   The registrant's other certifying officers and I have disclosed, based
          on our most recent evaluation, to the registrant's auditors and the
          audit committee of the registrant's board of directors (or persons
          performing the equivalent function):

          (a)  all significant deficiencies in the design or operation of
               internal controls which could adversely affect the registrant's
               ability to record, process, summarize, and report financial data
               and have identified for the registrant's auditors any material
               weaknesses in internal controls; and

          (b)  any fraud, whether or not material, that involves management or
               other employees who have a significant role in the registrant's
               internal controls.

     6.   The registrant's other certifying officers and I have indicated in
          this quarterly report whether or not there were significant changes in
          internal controls or in other factors that could significantly affect
          internal controls subsequent to the date of our most recent
          evaluation, including any corrective actions with regard to
          significant deficiencies and material weaknesses.

Date: May 20, 2003

                                   By: /s/ Bernard M. Ciongoli
                                       -----------------------------------------
                                   President, Chief Executive Officer, and Chief
                                   Financial Officer


                                       11
<PAGE>