Cash Flow · 2026-07-12 · 6 min read

Written and reviewed by Project Financial Advisor · FCA · CGMA · ACMA — Chartered Accountant

Debt Service Coverage Ratio (DSCR): Formula & Meaning

The debt service coverage ratio (DSCR) measures whether a business generates enough cash to cover its debt payments. It is the single most important ratio in project finance, real-estate lending and any leveraged deal, because it answers the lender's core question: will this borrower be able to pay? Here is the formula, what lenders require, and how to model it.

What DSCR is

DSCR compares the cash available to service debt against the debt payments due in the same period. A DSCR of 1.0 means the business generates exactly enough to cover principal and interest; below 1.0 it cannot; above 1.0 it has a cushion. Lenders lend against the ratio, not just against profit.

The DSCR formula

DSCR = Cash Flow Available for Debt Service (CFADS) ÷ Debt Service. CFADS is typically EBITDA less cash taxes, less the increase in working capital, less maintenance CAPEX — the cash genuinely available before financing. Debt service is scheduled principal plus interest for the period. Real-estate lenders often use net operating income as the numerator; the principle is identical.

What lenders require

Lenders set a minimum DSCR covenant — commonly 1.20x to 1.40x for corporate and real-estate loans, and higher for riskier projects — giving them a buffer if cash flow disappoints. Breaching it can trigger default even if payments are still being met, so a borrower's model must show DSCR staying comfortably above the covenant across the loan life, including in a downside case.

A worked example

A project generates $1.5m of CFADS in a year and owes $600,000 of interest plus $400,000 of principal — $1.0m of debt service. DSCR = $1.5m ÷ $1.0m = 1.5x, a healthy 50% cushion. If CFADS fell to $1.1m, DSCR would drop to 1.1x — below a typical 1.2x covenant, breaching the loan even though the business could technically still pay.

DSCR vs interest coverage

Interest coverage (EBIT ÷ interest) only tests the interest portion; DSCR is stricter because it includes principal repayment, the real cash obligation. For amortising loans, DSCR is the ratio that matters — a business can have comfortable interest coverage yet fail DSCR if principal repayments are heavy.

Model DSCR automatically

Worked DSCR example and how lenders use it

Suppose a project generates $1.4m of cash available for debt service in a year, and its debt service — interest plus scheduled principal — is $1.0m. DSCR = 1.4 ÷ 1.0 = 1.40x, a comfortable 40% cushion. If cash flow fell to $1.0m, DSCR would drop to 1.0x with no margin, and below that the borrower must fund repayments from reserves or new financing.

Lenders rarely rely on a single year. They test the minimum DSCR across the loan's life and often an average DSCR, sizing debt so both stay above agreed floors (commonly 1.20–1.35x). A covenant breach can sweep excess cash to prepay debt, block dividends, or trigger default.

EasyFinancialModels builds a full debt schedule — drawdown, interest, principal and closing balance — and derives the cash available for debt service from the linked statements, so you can read DSCR by period and test it against a covenant. Use our cashflow forecasting model to check whether your cash flow covers debt service across the full loan life, free for up to 3 years.

DSCR across the cycle

A single strong DSCR in year one means little if the ratio deteriorates later. Lenders and analysts examine the profile of DSCR across the whole loan life, stress-testing it against lower revenue, higher costs and rising interest rates. The weakest projected year — the minimum DSCR — usually governs how much debt the business can safely carry. Building the ratio as a live output that recalculates when assumptions change lets you see instantly whether a downturn breaches the covenant, and how much cushion a proposed debt level really leaves. That forward-looking, whole-life view is what separates a financing that survives a bad year from one that defaults in it.

CFADS: the numerator, done properly

A DSCR is only as honest as its numerator. Casual calculations divide EBITDA by debt service; lenders use CFADS — cash flow available for debt service — because EBITDA quietly includes cash the business never gets to keep. The build-down: start with EBITDA, subtract cash taxes, subtract the working-capital movement, subtract maintenance CAPEX. What remains is the cash genuinely available to pay lenders.

The same business measured on EBITDA would show 5.0 ÷ 2.4 = 2.08x — nearly double the coverage, and flattering to the point of fiction. The 1.25x CFADS-based figure is the one a credit committee will compute, which is why building the forecast on CFADS from the start avoids an awkward conversation later.

ADSCR, LLCR and the rest of the coverage family

ADSCR simply means the annual DSCR — the ratio computed for each year of the forecast separately, rather than one blended average. Lenders read the whole profile: the minimum ADSCR identifies the most dangerous year, and the average describes overall comfort. Alongside it sits the LLCR — loan life coverage ratio — which divides the present value of all CFADS across the remaining loan life by the debt outstanding today; where ADSCR asks about each year, LLCR asks whether the whole loan is covered by the whole forecast. Project financings typically covenant all three, and the generated model computes DSCR by period automatically so the full profile is visible, not just one year.

### Stress the ratio before the lender does

A base-case DSCR of 1.35x means little on its own — the credit question is what survives a bad year. Rerun the forecast with revenue 10–15% lower, costs inflated, and, for floating-rate debt, the interest rate two points higher; if the minimum ADSCR still clears the covenant, the structure has genuine headroom. If it dips below 1.0x in any stressed year, the deal needs less debt, a reserve account, or a repayment profile sculpted around the weak period. Running that stress yourself, before term sheets, is the difference between negotiating a structure and being handed one. The two-way sensitivity tables in the generated workbook make this a five-minute exercise: revenue down one axis, interest rate down the other, minimum ADSCR in every cell.

Frequently asked questions

What is DSCR?

Debt Service Coverage Ratio = cash available for debt service ÷ total debt service (interest + principal). It shows how comfortably a business's cash flow covers its debt payments.

What is a good DSCR?

Lenders typically require 1.20–1.35x or higher. A DSCR of 1.0 means cash exactly covers debt service with no cushion; below 1.0 means operating cash cannot meet the payments.

How is DSCR used in project finance?

It sizes debt and sets covenants — lenders cap borrowing so projected DSCR stays above a minimum, and a breach can trap cash or trigger default.

What is CFADS?

Cash Flow Available For Debt Service — the lender's numerator for DSCR. CFADS = EBITDA − cash taxes − working-capital movement − maintenance CAPEX, adjusted for any reserve movements. It is stricter than EBITDA because it strips out the cash the business must spend before servicing debt.

What does ADSCR mean?

Annual Debt Service Coverage Ratio — the DSCR computed for each individual year of the forecast rather than one blended figure. Lenders test both the minimum ADSCR (the worst year) and the average across the loan life, alongside the loan life coverage ratio (LLCR).

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About the author

Every model is built and reviewed by the project's Financial Advisor — a Fellow Chartered Accountant (FCA) of the Institute of Chartered Accountants of Pakistan (ICAP), Chartered Global Management Accountant (CGMA) and Associate Chartered Management Accountant (ACMA) with around two decades of corporate finance, audit and accounting experience, designing investor-grade financial models across industries. Full credentials and background are available on LinkedIn. More about the author →

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