DSCR Calculator (Debt Service Coverage Ratio)
Debt service coverage ratio from net operating income and annual loan payments, with a lender read.
What it does
The debt service coverage ratio answers one question for a lender: does this property or business throw off enough cash to pay its own loan, with room to spare. It divides annual net operating income by the annual principal and interest. The result is written with an x, so 1.50x means income covers the loan payment one and a half times.
Use it before applying for a commercial mortgage, an SBA loan, or a business acquisition loan. Brokers and underwriters run the same number to size a loan, because a large balance is only affordable if the cash flow supports it. The tool above takes two figures and returns the ratio, a plain read, and the largest payment the income could carry at 1.25x.
Net operating income is not the same as net profit. It is the income left after operating expenses, before interest, tax, and depreciation, so it measures cash from running the asset rather than accounting profit. That is why the ratio isolates the loan from the tax picture and from how the purchase was financed.
The 1.25x floor is a convention rather than a law. Many lenders want net operating income to exceed the payment by at least a quarter as a cushion for a slow year, repairs, or higher rates at renewal. A ratio near 1.0x leaves no margin, and a ratio under 1.0x means the asset depends on outside cash to stay current.
This page reports the standard form of the ratio. Lenders apply their own rules about which expenses to deduct, how to treat owner pay, and whether to use the trailing year or a projection, so treat the number as a first screen rather than a final approval.
How to use
- Enter your annual net operating income in dollars.
- Enter the total annual debt service, principal plus interest.
- Read the ratio and compare it with the 1.25x floor.
- Check the maximum debt service the income can carry at 1.25x.
- Adjust the loan term or rate and watch the ratio move.
- Treat anything under 1.0x as a shortfall to fix before applying.
Formula
- NOI
- Annual net operating income in dollars.
- DS
- Annual debt service, principal plus interest, in dollars.
- 1.25x
- Common minimum ratio many lenders require.
If you only know the monthly payment, multiply it by 12 first, because the ratio compares like periods. Some lenders deduct replacement reserves or unfinanced capital spending from income before dividing, which lowers the ratio slightly compared with the basic form.
Worked example
Example: $120,000 income, $80,000 debt service
Net operating income 120,000 dollars, annual debt service 80,000 dollars.
- DSCR = 120,000 / 80,000 = 1.50.
- 1.50 sits above the 1.25 floor, so the loan reads strong.
- Maximum debt service at 1.25x = 120,000 / 1.25 = 96,000 dollars.
- Headroom = 96,000 - 80,000 = 16,000 dollars a year of cushion.
Reference table
| DSCR | Meaning | Typical outcome |
|---|---|---|
| Below 1.0x | Income does not cover the loan | Not fundable as-is |
| 1.0x to 1.24x | Tight coverage | Below the common floor |
| 1.25x to 1.49x | Acceptable coverage | Clears the floor |
| 1.50x and above | Strong coverage | Clear cushion |
Limits
- Uses the income and payment you enter, not a lender's adjusted figures.
- Ignores reserves, capital spending, and vacancy beyond what you put in income.
- A single year can be flattering or harsh. Lenders often average several years.
- Does not judge credit, collateral, or guarantor strength.
Common mistakes
- Using net profit instead of net operating income.
- Comparing a monthly payment against an annual income without matching periods.
- Forgetting that property taxes, insurance, and HOA dues raise debt service.
- Assuming a ratio just over 1.0x will pass underwriting.
- Ignoring a rate reset that raises the payment at renewal.
Try it yourself
Quick checks. Answers sit tucked under each question.
Income 100,000 dollars, debt service 50,000 dollars?
100,000 / 50,000 = 2.00x, strong.
Income 90,000 dollars, debt service 80,000 dollars?
90,000 / 80,000 = 1.13x, below the 1.25x floor.
Maximum debt service at 1.25x on 150,000 dollars of income?
150,000 / 1.25 = 120,000 dollars.
Questions
What is a good DSCR?
1.25x or higher is the common floor. 1.50x and above gives a comfortable cushion.
What does a DSCR below 1.0 mean?
Net operating income does not cover the loan payment, so the loan needs outside cash.
Is DSCR the same as net profit margin?
No. DSCR compares income to a specific loan payment, not profit to revenue.
How do I raise my DSCR?
Raise income, cut operating expenses, lower the payment by extending the term, or reduce the loan amount.
Should I use monthly or annual figures?
Either works if both sides match the same period. This tool uses annual figures.
Do taxes and insurance count in debt service?
Yes if they are escrowed with the loan, because they are part of the yearly payment.
Sources
- FDIC: debt service coverage ratio citations
- eCFR: 7 CFR Part 5001, definition of debt service coverage ratio