Our operating leases expire at various dates through 2037 and are primarily for office space, automobiles, servers, and office equipment.

Our headquarters are located at 121 Seaport Boulevard, Boston, Massachusetts (the Boston lease). The Boston lease is for approximately 250,000 square feet and runs through June 30, 2037. Base rent for the first year of the lease was $11.0 million and increases by $1 per square foot per year thereafter ($0.3 million per year). Base rent first became payable on July 1, 2020. In addition to the base rent, we are required to pay our pro rata portions of building operating costs and real estate taxes (together, “Additional Rent”). Annual Additional Rent is estimated to be approximately $7.1 million. The lease provides for $25 million in landlord funding for leasehold improvements ($100 per square foot). The leasehold improvement funding provision was fully utilized by us and was reflected as a derecognition adjustment to the right-of-use asset.

In February 2019, we subleased a portion of the Boston location through June 30, 2022, and received approximately $9.1 million in sublease income over the term of the sublease. In March 2022, we extended the sublease through June 30, 2023 and we will receive $2.9 million in sublease income over the term of the extension.

The components of lease cost reflected in the Consolidated Statement of Operations for the year ended September 30, 2022 were as follows:


(in thousands)	Year ended September 30, 2022
Operating lease cost	$	34,346
Short-term lease cost		2,653
Variable lease cost		10,095
Sublease income		(4,600	)
Total lease cost	$	42,494

Supplemental cash flow and right-of use assets information for the year ended September 30, 2022 was as follows:


(in thousands)	Year ended September 30, 2022
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	38,709
Financing cash flows from operating leases	$	297
Right-of-use assets obtained in exchange for new lease obligations:
Operating leases	$	15,431
Financing leases	$	—

Supplemental balance sheet information related to the leases as of September 30, 2022 was as follows:


	As of September 30, 2022
Weighted-average remaining lease term - operating leases	11.8 years
Weighted-average remaining lease term - financing leases	2 years
Weighted-average discount rate - operating leases		5.4	%
Weighted-average discount rate - financing leases		3.0	%

Maturities of lease liabilities as of September 30, 2022 are as follows:


(in thousands)	Operating Leases
2022	$	31,612
2023		26,907
2024		23,495
2025		19,487
2026		16,662
Thereafter		143,236
Total future lease payments		261,399
Less: imputed interest		(71,824	)
Total	$	189,575

As of September 30, 2022 we had operating leases that had not yet commenced. The leases will commence in FY'23 with a lease term of 10 years and we will make future lease payments of approximately $11.6 million.

As of September 30, 2022, we have net liabilities of $0.3 million related to excess facilities (compared to $3.6 million at September 30, 2021), representing lease obligations classified as short term.

In determining the amount of right-of-use assets for restructured facilities, we are required to estimate such factors as future vacancy rates, the time required to sublet properties, and sublease rates. Updates to these estimates may result in revisions to the value of right-of-use assets recorded. The amounts recorded are based on the net present value of estimated sublease income. As of September 30, 2022, There was no committed sublease income included in the right-of-use assets for exited facilities and there was no uncommitted sublease income. As a result of changes in our sublease income assumptions and an incremental obligation to exit a portion of our former headquarters facility early in the year ended September 30, 2022, we recorded a facility impairment charge of $1.3 million.

In the year ended September 30, 2022, we made payments of $2.0 million related to lease costs for exited facilities.