<PAGE>

                                                                    EXHIBIT 10.7

                             FOURTH AMENDMENT TO THE
                    INTERFACE, INC. NONQUALIFIED SAVINGS PLAN

         THIS FOURTH AMENDMENT to the Interface, Inc. Nonqualified Savings Plan
(the "Plan") is made on this 31st day of December, 2003, by the Administrative
Committee.

                                   WITNESSETH:

         WHEREAS, Interface, Inc. maintains the Plan for the benefit of its
eligible employees;

         WHEREAS, Section 9.1 of the Plan provides that the Administrative
Committee has the authority to amend the Plan at any time; and

         WHEREAS, the Administrative Committee desires to amend the Plan to: (i)
permit Participants to defer future installment payments; (ii) shorten the
period for converting a lump sum payment election to an installment payment
election; and (iii) permit Participants to convert an installment payment
election to a lump sum payment election;

         NOW, THEREFORE, the Plan is hereby amended, as follows:

         1.       Effective December 31, 2003, Section 5.1(b)(iii) is amended in
its entirety to read as follows:

                  (iii)    Modifications of Benefit Commencement Date. With
         respect to any initially scheduled benefit commencement date (as
         determined in accordance with subsections (b)(i) or (b)(ii) hereof), a
         Participant who has not yet reached such initially scheduled benefit
         commencement date may elect, at least 90 days before such date, to
         delay the payment (or commencement) of his Annual Account Balance
         payable on such date to a later date, or may elect at least 1 year
         before such date to accelerate an initially scheduled benefit
         commencement date to an earlier date, provided, any election to
         accelerate the payment will be effective only if the rescheduled
         benefit commencement date is no earlier than the first day of the
         second Plan Year that begins after the date the election to accelerate
         is made. The Annual Account Balance shall be paid (or commenced) as
         soon as administratively feasible after such delayed or accelerated
         date. A Participant may, with respect to each Annual Account Balance,
         make no more than 5 elections to delay, and no more than 2 elections to
         accelerate, his scheduled benefit commencement date, subject to the
         timing restrictions set forth above. If distribution of a Participant's
         Annual Account Balance has already begun in the form of installment
         payments, the Participant may elect at least 90 days before the
         scheduled date of the next installment payment to delay the payment of
         the remaining installment payments of his Annual Account Balance to a
         later date (e.g., if there are three annual installments remaining and
         the Participant elects to delay the payment of these installments by 2
         years, the first of the remaining

                                       1
<PAGE>

         installments will be made 2 years later followed by the last two annual
         installments).

         2.       Effective December 31, 2003, the first paragraph of Section
5.2(b) is amended in its entirety to read as follows:

                  (b)      ANNUAL INSTALLMENTS. A Participant may elect, at the
         time he makes a Deferral Election for each Plan Year, to have his
         Annual Account Balance payable under Section 5.1 paid in the form of
         annual installment payments. To the extent a Participant elects
         multiple benefit commencement dates in accordance with Section
         5.1(b)(v), such Participant may elect at the time of such subsequent
         Deferral Elections, to have the Annual Account Balance attributable to
         such election paid in the form of annual installments beginning as of
         such benefit commencement dates. If a Participant does not elect the
         installment form of distribution with respect to a benefit commencement
         date, his Annual Account Balance corresponding to such benefit
         commencement date shall be paid in the form of a single-sum payment
         unless, at least 90 days before such benefit commencement date, the
         Participant makes an election in writing to receive such Annual Account
         Balance in the form of installment payments (in accordance with the
         terms of this subsection). If a Participant elects the installment form
         of distribution with respect to a benefit commencement date, he may
         later elect, at least 90 days before such benefit commencement date, to
         receive such Annual Account Balance in the form of a single-sum
         payment, provided, any such election will be effective only if the
         benefit commencement date is no earlier than the first day of the
         second Plan Year that begins after the date the election to receive a
         single-sum payment is made. The following terms and conditions shall
         apply to installment payments made under the Plan:

         3.       Except as specified herein, the Plan shall remain in full
force and effect.

         IN WITNESS WHEREOF, the Administrative Committee has caused its duly
authorized officer to execute this Fourth Amendment on the date first written
above.

                                             INTERFACE, INC.

                                             By: /s/ W. Reynolds
                                                 -------------------------------

                                             Title: Secretary