DSCR Calculator
Debt service coverage ratio.
Calculate Debt Service Coverage Ratio for property and business loans. Enter net operating income annual to see dscr ratio and rates lender comfort level.
What this tool does
This calculator computes the debt service coverage ratio (DSCR) by dividing your annual net operating income by your total annual debt service. The result shows how many times over your operating income covers your debt obligations in a given year. DSCR is widely used by lenders to assess whether an income-producing property generates sufficient cash flow to service its debt. The two inputs—net operating income and total annual debt service—are the primary drivers of the ratio. A property generating strong annual operating income relative to debt payments produces a higher DSCR. This calculator illustrates how changes in either figure shift the coverage multiple. The output is educational and reflects historical or modelled figures; it does not account for tax liabilities, capital expenditures, vacancy fluctuations, or changes in market conditions over time. Lenders typically apply their own acceptance thresholds when evaluating properties.
Quick answer: with the default values, the result is 1.33x (Debt Service Coverage Ratio). Adjust the values below for your own figures.
Enter Values
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Formula Used
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Calculations or display — let us know.
Disclaimer
Results are estimates for educational purposes only. They do not constitute financial advice. Consult a qualified professional before making financial decisions.
DSCR (Debt Service Coverage Ratio) measures whether a property or business generates enough income to cover debt payments. Formula: NOI / Total Debt Service. DSCR of 1.0 means just covering debt, 1.25 is acceptable to most lenders, 1.5+ is comfortable. Below 1.0 means losing money each period.
Example: rental property NOI 24,000/year, mortgage payments 18,000/year. DSCR = 1.33x (6,000 cushion). Most commercial lenders require minimum 1.20-1.25x DSCR. BTL: typically 1.25x for individuals at 5.5% stress rate, 1.45x for limited companies. Higher LTV requires higher DSCR.
DSCR loans (no income verification, qualify on property cash flow) growing rapidly - useful for self-employed investors and portfolio landlords. Calculation uses gross rent × occupancy assumption (usually 75-90%) minus operating expenses (taxes, insurance, maintenance, management). Lender NOI typically lower than your projection - they apply conservative haircuts.
Run it with sensible defaults
Using net operating income of 24,000, total annual debt service of 18,000, the calculation works out to 1.33x. The defaults are meant as a starting point, not a recommendation.
The levers in this calculation
The inputs — Net Operating Income (annual) and Total Annual Debt Service — do not pull with equal force. Not every input has equal weight. Adjusting one input at a time toward extreme values shows which ones move the result most.
How the math works
DSCR = NOI / total debt service. Above 1.25 acceptable to most lenders.
Reading a low result
A disappointing result is information, not a judgement. The input that dragged the figure down most is usually where a single change has the largest effect, since depth on the worst input tends to move the result more than spreading effort across every input at once.
What this doesn't capture
The result reflects only the inputs you provide and the assumptions built into the formula. It is a simplified model rather than a complete picture, and factors specific to your situation may matter just as much.
NOI £24,000 / Debt £18,000 = 1.33x.
Inputs
| NOI | $24,000.00 |
|---|---|
| Total Debt Service | $18,000.00 |
| Cushion Above Debt | $6,000.00 (33.33%) |
| Rating | Acceptable (most lenders) |
This example uses typical values for illustration. Adjust the inputs above to match a specific situation and see how the result changes.
Sources & Methodology
Methodology
This calculator computes the debt service coverage ratio by dividing net operating income by total annual debt service. The result indicates how many times over a property or business can cover its debt obligations from operating earnings. The calculator treats both inputs as annual figures and assumes they remain constant; it does not model seasonal variation, income volatility, or changes in debt structure over time. The computation applies no adjustments for fees, taxes, or capital expenditures. Results reflect a snapshot calculation only and do not account for market conditions, refinancing risk, or lender-specific underwriting criteria that may influence actual lending decisions.
References
Frequently Asked Questions
What DSCR do lenders require?
DSCR vs cap rate?
How to improve DSCR?
DSCR loan vs traditional?
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