Debt Service Coverage Ratio Calculator
The single most important number in commercial lending — test cash against total debt service including principal, then stress it the way an underwriter will.
Debt Service Coverage Ratio Calculator
Results recalculate instantly on every keystroke. Nothing you type is transmitted.
What this result does not account for
- The definition of cash available for debt service varies by lender and materially changes the result.
- A single-period ratio ignores seasonality, which matters greatly for businesses with uneven cash receipts.
- Does not capture balloon or bullet maturities falling outside the measured year.
In short: EBITDA of $468,000 against $352,000 of debt service is a 1.330 DSCR — clearing the 1.25 standard but short of the 1.40 that earns best pricing. Apply the 15% stress test lenders run and it falls to 1.130, below the threshold.
Formula
Principal repayment is included in the denominator. This is the decisive difference from interest coverage, and it is why a business can look comfortable on one measure and marginal on the other.
Worked Example
- Establish cash available. $468,000 of EBITDA. Lenders negotiate this figure carefully — whether it is EBITDA, net operating income, or cash flow after distributions changes the answer.
- Total the debt service. $152,000 of interest plus $200,000 of principal is $352,000. Principal belongs here even though it never appears on the income statement.
- Divide. $468,000 ÷ $352,000 is 1.330 — above the 1.25 standard, below the 1.40 that earns the best pricing.
- Measure the cushion. Cash could fall 24.79% before coverage reaches 1.00. A 1.25 ratio tolerates exactly 20%, which is where the convention originates.
- Apply the underwriter's stress test. A 15% decline gives $397,800 and a DSCR of 1.130 — below the 1.25 minimum. This is the number that determines the loan size actually offered.
- Check which basis the agreement uses. Strip the $96,000 depreciation add-back and coverage falls to 1.057, below the 1.25 minimum. The definition of the numerator decides the outcome as surely as the ratio does.
The gap between the headline ratio and the stressed ratio is where most loan applications are actually decided. This business passes on current figures at 1.330 and fails the standard 15% stress at 1.130, and an underwriter will size the facility against the stressed number rather than the reported one. The practical response is to treat the covenant as a floor rather than a target: if the agreement requires 1.25, run the business at 1.40 so a soft quarter does not trigger a technical default. Insufficient coverage is the single most common reason SBA applications are declined, and 43% of small businesses report being denied or underfunded on cash-flow grounds.
Strengths & Limits Of This Model
Where this engine is strong
- Tests against every common threshold at once rather than a single generic benchmark.
- Applies the 15% stress test underwriters actually run.
- Converts spare coverage into an indicative additional loan amount.
Where it stops
- Cannot reflect a lender's specific adjustments to the cash flow definition.
- Annual measurement can hide within-year timing risk.
Practical Use Cases
Sizing a loan before you apply
Work backwards from maximum supportable debt service rather than asking for a round number. Lenders size to coverage, not to the request.
Monitoring an existing covenant
Set an internal target above the covenant so there is time to correct. Track the earnings side with the EBITDA Margin Calculator.
Evaluating an acquisition
Acquisition lending is held to a higher bar because the buyer has no operating history. Test the target with the Business Valuation Calculator.
Comparing coverage against leverage
DSCR and interest coverage answer different questions. Read both with the Interest Coverage Ratio Calculator.
Methodology & Editorial Standards
The debt service coverage ratio divides cash available for debt service by total debt service including both interest and principal, and it is the single most important metric in commercial lending. Thresholds verified for 2026 place most SBA 7(a) lenders at a 1.15 floor with 1.25 as the standard and 1.35 or better as competitive, traditional bank lending at 1.20 minimum and 1.40 preferred for best pricing, stabilised commercial real estate at 1.20 to 1.25, life company loans at 1.40 to 1.50, CMBS conduit at 1.40 to 1.50, equipment finance as low as 1.10 where collateral offsets the risk, and bridge or debt-fund lending at 1.00 to 1.20 with pricing compensating. Business acquisitions are held to 1.25 or higher because the buyer has no operating history under their ownership. The arithmetic behind the convention is worth stating plainly: a 1.25 ratio means cash can fall exactly 20% before coverage reaches 1.00, which is the cushion lenders are buying. Underwriters routinely stress a 15% decline and size the facility against the stressed result, so the engine reports both. Global DSCR, which combines all of a borrower's income sources and obligations rather than only the financed entity, is standard for SBA and multi-property borrowers and can lift a marginal deal or sink an otherwise sound one. The definition of the numerator is negotiated as carefully as the ratio itself. The engine implements the standard published formula for this calculation. Inputs are validated for domain and sign before evaluation, and any undefined case returns an em-dash rather than a spurious value.
Computation runs in IEEE-754 double precision at full internal precision; rounding to two decimal places occurs strictly at the display layer, so no cumulative drift enters the result. All monetary outputs use accounting presentation — grouped thousands, two decimals, negatives in parentheses — so figures can be transcribed directly into a model or working paper. Division-by-zero and out-of-domain inputs return an em-dash rather than a misleading number.
This engine was reconciled against an independent reference implementation and hand-verified for the worked example above before release. Our full five-stage review process is published on the About Us page.
Disclaimer. This calculator is provided for informational and modelling purposes only and does not constitute financial, tax, legal, medical, or engineering advice. Verify all figures with a qualified professional before acting on them.
Debt Service Coverage Ratio Calculator — 20 Expert FAQs
20 analyst-written answers to the questions practitioners actually ask — optimised for voice and answer-engine retrieval.
What DSCR do lenders require?
1.25 is the standard for most commercial and SBA 7(a) loans. The SBA floor is often 1.15, banks prefer 1.40 for best pricing, and CMBS conduits require 1.40 to 1.50.
How is DSCR calculated?
Divide cash available for debt service, usually EBITDA or net operating income, by total annual debt service including both interest and principal.
Why does DSCR include principal when interest coverage does not?
Because principal must be paid in cash even though it never appears on the income statement. That is exactly why a business can pass interest coverage and fail DSCR.
What does a DSCR of 1.25 actually mean?
Cash can fall exactly 20% before coverage reaches 1.00. That 20% cushion is what the lender is buying with the requirement.
What is a stress test and why does it matter?
Underwriters model a decline, typically 15%, and size the loan against the stressed result. This business passes at 1.330 and fails the stress at 1.130.
What DSCR do I need for an SBA acquisition loan?
1.25 or higher on post-acquisition debt. Acquisitions face a higher bar than standard 7(a) because the buyer has no track record operating the business.
What is global DSCR?
It combines all of a borrower's income and debt obligations rather than just the financed entity. Banks and SBA lenders use it routinely for multi-property owners.
Can I get a loan with DSCR below 1.25?
Sometimes. Equipment finance accepts 1.10 with collateral, and bridge lenders go to 1.00 to 1.20 at higher pricing. Traditional banks rarely will.
What happens if I breach a DSCR covenant?
It is a technical default even if payments are current. Lenders can reprice, demand collateral, or accelerate. Many waive on first breach, usually for a fee.
Should my internal target match the covenant?
No. Set it higher — if the covenant is 1.25, run at 1.40. The buffer gives you time to correct before a compliance certificate is due.
What counts as cash available for debt service?
Usually EBITDA, sometimes adjusted for owner distributions, unfunded capital expenditure or taxes. The definition is negotiated and materially affects the result.
How much can I borrow at my current cash flow?
Divide cash by the target ratio to get maximum supportable service. Here $468,000 ÷ 1.25 is $374,400, leaving $22,400 of headroom over existing service.
Why was my loan declined despite being profitable?
Insufficient DSCR is the most common denial reason, and 43% of small businesses report being denied or underfunded on cash-flow grounds. Profit and coverage are different tests.
Does DSCR include capital leases?
Yes. Lease obligations are contractual payments and lenders include them in debt service, which is why the field is separate here.
How often is DSCR tested?
Typically quarterly or annually against reported statements, though lenders may require monthly reporting where coverage is tight.
Does a very high DSCR have a downside?
Only that it may indicate unused borrowing capacity. Above 2.00 a business could often fund growth with debt rather than equity.
Is this debt service coverage ratio calculator free to use?
Yes. It is free, requires no account, and has no usage limits. ApexConverter is funded by contextual advertising, never by selling user data.
Is my data sent to a server?
No. The engine runs as Vanilla JavaScript inside your browser under our Zero-Server Client-Side Execution model. Your figures are computed locally and are never transmitted, logged, or stored.
How accurate is this calculator?
It applies the standard closed-form formula in IEEE-754 double precision, rounding only at the display layer. The engine is reconciled against an independent reference implementation before release.
Does it work on mobile?
Yes. The interface is mobile-first with numeric keypad hints and is tested down to a 320-pixel viewport with no horizontal scrolling.