Debt service reserve account (DSRA)
A debt service reserve account is a pledged cash reserve maintained by the borrower to cover a defined period of upcoming principal and interest if operating cash flow is insufficient. AFME's project-finance discussion paper places funding of any debt service reserve account in the cash waterfall after debt service and before distributions, and describes the reserve as generally equal to six months of debt service so the project can service debt during periods of tighter liquidity.
Debt service reserve account use on PF and CRE desks
In project finance and single-asset CRE facilities the reserve is part of the liquidity and security-package design. Lenders size the target balance, decide whether it is funded at construction end, built from early operating cash, or substituted by a letter of credit or sponsor guarantee, and rank top-ups in the cash waterfall ahead of equity distributions. World Bank guarantee frameworks likewise treat a debt service reserve as a structural credit feature: the Mozambique Sasol appraisal states that the guarantee framework requires a debt service reserve equivalent to at least six months' debt service payments for all senior lenders, and records that commercial lenders replaced the account with an unconditional corporate debt-service support guarantee in that transaction.
The Côte d'Ivoire Azito power appraisal describes a six-month debt service reserve designed to be fully funded at the end of construction, half from debt and equity funds and half from surplus operating cash flow, and notes that the IDA guarantee could be called only after the debt service reserve and escrow account had been accessed and a shortfall remained.
Mechanics: sizing, funding and release
Typical mechanics include:
- a target balance equal to a stated number of months or payment periods of scheduled debt service
- initial funding at completion or progressive build-up from surplus cash after senior debt service
- mandatory top-up from post-debt-service cash before distributions
- draw to meet scheduled debt service when cash flow available for debt service is short
- release of excess above target, and full release at final maturity, subject to facility terms
An escrowed reserve of this kind is a recognised credit enhancement in project finance because it increases lender control over cash and helps ensure debt is serviced ahead of discretionary spending. CRE facilities use the same liquidity logic on property cash, often with shorter reserve horizons where leases are stable.
Distinctions from cash traps and cash sweeps
A debt service reserve account is a standing liquidity buffer. A distribution lock-up or cash trap retains surplus cash inside the borrower when debt service coverage ratio (DSCR) or other tests fail, without necessarily prepaying debt. A cash sweep applies surplus cash to mandatory prepayment. Reserve balances may also appear in LLCR definitions when the term sheet adds the account to the coverage numerator; that modelling choice must be explicit.