EX-31 Rule 13a-14(d)/15d-14(d) Certifications.





I, Kunal K. Singh, certify that:



1. I have reviewed this report on Form 10-K and all reports on
Form 10-D required to be filed in respect of the period covered by this report on
Form 10-K of the Benchmark 2020-IG1 Mortgage Trust (the "Exchange Act
periodic reports");



2. Based on my knowledge, the Exchange Act periodic reports, taken
as a whole, do 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 report;



3. Based on my knowledge, all of the distribution, servicing and
other information required to be provided under Form 10-D for the period
covered by this report is included in the Exchange Act periodic reports;



4. Based on my knowledge and the servicer compliance statements
required in this report under Item 1123 of Regulation AB, and except as
disclosed in the Exchange Act periodic reports, the servicers have fulfilled
their obligations under the servicing agreements in all material respects; and



5. All of the reports on assessment of compliance with servicing
criteria for asset-backed securities and their related attestation reports on
assessment of compliance with servicing criteria for asset-backed securities
required to be included in this report in accordance with Item 1122 of
Regulation AB and Exchange Act Rules 13a-18 and 15d-18 have been included as an
exhibit to this report, except as otherwise disclosed in this report. Any
material instances of noncompliance described in such reports have been
disclosed in this report on Form 10-K.



In giving the certifications above, I have reasonably relied on
information provided to me by the following unaffiliated parties:



Midland Loan Services, a Division of PNC Bank, National
Association, as Master Servicer, Midland Loan Services, a Division of PNC Bank,
National Association, as Special Servicer, Wells Fargo Bank, National
Association, as Trustee and Certificate Administrator, Wells Fargo Bank,
National Association, as Custodian, Computershare Trust Company, National
Association, as Servicing Function Participant for the Certificate
Administrator, Computershare Trust Company, National Association, as Servicing
Function Participant for the Custodian, KeyBank National Association, as
Primary Servicer for the Bellagio Hotel and Casino Mortgage Loan, Situs
Holdings, LLC, as Special Servicer for the Bellagio Hotel and Casino Mortgage
Loan, Wells Fargo Bank, National Association, as Trustee for the Bellagio Hotel
and Casino Mortgage Loan, Wells Fargo Bank, National Association, as Custodian
for the Bellagio Hotel and Casino Mortgage Loan, Park Bridge Lender Services
LLC, as Operating Advisor for the Bellagio Hotel and Casino Mortgage Loan,
Computershare Trust Company, National Association, as Servicing Function
Participant for the Custodian for the Bellagio Hotel and Casino Mortgage Loan,
KeyBank National Association, as Primary Servicer for the 650 Madison Avenue
Mortgage Loan, LNR Partners, LLC, as Special Servicer for the 650 Madison
Avenue Mortgage Loan, Wilmington Trust, National Association, as Trustee for
the 650 Madison Avenue Mortgage Loan, Citibank, N.A., as Custodian for the 650
Madison Avenue Mortgage Loan, U.S. Bank National Association, as Servicing
Function Participant for the 650 Madison Avenue Mortgage Loan, Wells Fargo
Bank, National Association, as Primary Servicer for the 55 Hudson Yards
Mortgage Loan, CWCapital Asset Management LLC, as Special Servicer for the 55
Hudson Yards Mortgage Loan, Wilmington Trust, National Association, as Trustee
for the 55 Hudson Yards Mortgage Loan, Wells Fargo Bank, National Association,
as Custodian for the 55 Hudson Yards Mortgage Loan, CoreLogic Solutions, LLC,
as Servicing Function Participant for the 55 Hudson Yards Mortgage Loan,
Computershare Trust Company, National Association, as Servicing Function
Participant for the Custodian for the 55 Hudson Yards Mortgage Loan, KeyBank
National Association, as Primary Servicer for the Parkmerced Mortgage Loan,
KeyBank National Association, as Special Servicer for the Parkmerced Mortgage
Loan, Wells Fargo Bank, National Association, as Trustee for the Parkmerced
Mortgage Loan, Wells Fargo Bank, National Association, as Custodian for the
Parkmerced Mortgage Loan, Park Bridge Lender Services LLC, as Operating Advisor
for the Parkmerced Mortgage Loan, Computershare Trust Company, National Association,
as Servicing Function Participant for the Custodian for the Parkmerced Mortgage
Loan, Wells Fargo Bank, National Association, as Primary Servicer for the 805
Third Avenue Mortgage Loan, BREF Partners Special Servicer LLC, as Special
Servicer for the 805 Third Avenue Mortgage Loan, Wilmington Trust, National
Association, as Trustee for the 805 Third Avenue Mortgage Loan, Citibank, N.A.,
as Custodian for the 805 Third Avenue Mortgage Loan, Pentalpha Surveillance
LLC, as Operating Advisor for the 805 Third Avenue Mortgage Loan, CoreLogic
Solutions, LLC, as Servicing Function Participant for the 805 Third Avenue
Mortgage Loan, U.S. Bank National Association, as Servicing Function
Participant for the 805 Third Avenue Mortgage Loan, KeyBank National Association,
as Primary Servicer for the 1633 Broadway Mortgage Loan, Situs Holdings, LLC,
as Special Servicer for the 1633 Broadway Mortgage Loan, Wells Fargo Bank,
National Association, as Trustee for the 1633 Broadway Mortgage Loan, Wells
Fargo Bank, National Association, as Custodian for the 1633 Broadway Mortgage
Loan, Pentalpha Surveillance LLC, as Operating Advisor for the 1633 Broadway
Mortgage Loan, Computershare Trust Company, National Association, as Servicing
Function Participant for the Custodian for the 1633 Broadway Mortgage Loan,
Midland Loan Services, a Division of PNC Bank, National Association, as Primary
Servicer for the Southcenter Mall Mortgage Loan, Midland Loan Services, a
Division of PNC Bank, National Association, as Special Servicer for the
Southcenter Mall Mortgage Loan, Wells Fargo Bank, National Association, as
Trustee for the Southcenter Mall Mortgage Loan, Wells Fargo Bank, National
Association, as Custodian for the Southcenter Mall Mortgage Loan, Pentalpha
Surveillance LLC, as Operating Advisor for the Southcenter Mall Mortgage Loan,
Computershare Trust Company, National Association, as Servicing Function
Participant for the Custodian for the Southcenter Mall Mortgage Loan, Midland
Loan Services, a Division of PNC Bank, National Association, as Primary
Servicer for the Starwood Industrial Portfolio Mortgage Loan, CWCapital Asset
Management LLC, as Special Servicer for the Starwood Industrial Portfolio
Mortgage Loan, Wells Fargo Bank, National Association, as Trustee for the
Starwood Industrial Portfolio Mortgage Loan, Wells Fargo Bank, National
Association, as Custodian for the Starwood Industrial Portfolio Mortgage Loan,
Pentalpha Surveillance LLC, as Operating Advisor for the Starwood Industrial
Portfolio Mortgage Loan, Computershare Trust Company, National Association, as
Servicing Function Participant for the Custodian for the Starwood Industrial
Portfolio Mortgage Loan, KeyBank National Association, as Primary Servicer for
the 181 West Madison Mortgage Loan, Situs Holdings, LLC, as Special Servicer
for the 181 West Madison Mortgage Loan, Wells Fargo Bank, National Association,
as Trustee for the 181 West Madison Mortgage Loan, Wells Fargo Bank, National
Association, as Custodian for the 181 West Madison Mortgage Loan, Park Bridge
Lender Services LLC, as Operating Advisor for the 181 West Madison Mortgage
Loan, Computershare Trust Company, National Association, as Servicing Function
Participant for the Custodian for the 181 West Madison Mortgage Loan, Midland
Loan Services, a Division of PNC Bank, National Association, as Primary
Servicer for the 560 Mission Street Mortgage Loan, KeyBank National
Association, as Special Servicer for the 560 Mission Street Mortgage Loan,
Wells Fargo Bank, National Association, as Trustee for the 560 Mission Street
Mortgage Loan, Wells Fargo Bank, National Association, as Custodian for the 560
Mission Street Mortgage Loan, Park Bridge Lender Services LLC, as Operating
Advisor for the 560 Mission Street Mortgage Loan, Computershare Trust Company,
National Association, as Servicing Function Participant for the Custodian for
the 560 Mission Street Mortgage Loan, Midland Loan Services, a Division of PNC
Bank, National Association, as Primary Servicer for the F5 Tower Mortgage Loan,
Midland Loan Services, a Division of PNC Bank, National Association, as Special
Servicer for the F5 Tower Mortgage Loan, Wells Fargo Bank, National
Association, as Trustee for the F5 Tower Mortgage Loan, Wells Fargo Bank,
National Association, as Custodian for the F5 Tower Mortgage Loan, Pentalpha
Surveillance LLC, as Operating Advisor for the F5 Tower Mortgage Loan,
Computershare Trust Company, National Association, as Servicing Function
Participant for the Custodian for the F5 Tower Mortgage Loan, Midland Loan
Services, a Division of PNC Bank, National Association, as Primary Servicer for
the Kings Plaza Mortgage Loan, Midland Loan Services, a Division of PNC Bank,
National Association, as Special Servicer for the Kings Plaza Mortgage Loan,
Wells Fargo Bank, National Association, as Trustee for the Kings Plaza Mortgage
Loan, Wells Fargo Bank, National Association, as Custodian for the Kings Plaza
Mortgage Loan, Pentalpha Surveillance LLC, as Operating Advisor for the Kings
Plaza Mortgage Loan, Computershare Trust Company, National Association, as
Servicing Function Participant for the Custodian for the Kings Plaza Mortgage
Loan, Midland Loan Services, a Division of PNC Bank, National Association, as
Primary Servicer for the 1501 Broadway Mortgage Loan, Midland Loan Services, a
Division of PNC Bank, National Association, as Special Servicer for the 1501
Broadway Mortgage Loan, Wells Fargo Bank, National Association, as Trustee for
the 1501 Broadway Mortgage Loan, Wells Fargo Bank, National Association, as
Custodian for the 1501 Broadway Mortgage Loan, and Computershare Trust Company,
National Association, as Servicing Function Participant for the Custodian for
the 1501 Broadway Mortgage Loan.





Dated:
March 13, 2023









/s/ Kunal K. Singh

Kunal K. Singh

President and Chief Executive Officer

(senior
officer in charge of securitization of the depositor)