Formula
DSCR = Net Operating Income ÷ Annual Debt Service
Sources: Freddie Mac Multifamily Seller/Servicer Guide, Glossary and List of Commonly Used Acronyms (10/20/26) (opens in a new tab), Glossary, “Debt Coverage Ratio”, p. 10; CRE Finance Council, Glossary of Terms: Commercial Mortgage-Backed Securities (2014) (opens in a new tab), “Debt Service Coverage Ratio (DSCR)”, p. 9 (PDF page 10)
- Net Operating Income (NOI)
- Income after operating expenses but before debt service, capital expenditure, income tax and depreciation.
- Annual Debt Service
- Twelve months of principal and interest payments on the loan, at the contractual payment amount.
How it works
DSCR answers the only question a lender genuinely cares about at underwriting: if this property performs as projected, is there enough cash left after running it to make the loan payments, and how much cushion is there before there isn't? A DSCR of 1.00x means income covers debt service exactly, with nothing to spare: one vacancy, one roof repair, one insurance renewal and the borrower is funding the mortgage out of pocket. This is why no conventional lender writes at 1.00x.
The ratio is a multiple, not a percentage, and is spoken that way: "one two five" means 1.25x, or income at 125% of debt service. A 1.25x DSCR means the property could lose 20% of its net operating income and still exactly cover debt service, because 1 ÷ 1.25 = 0.80. That inverse relationship is the fastest way to read a DSCR: the break-even decline in NOI is 1 minus the reciprocal of the ratio.
DSCR is rate-sensitive in a way that catches borrowers out. Because annual debt service sits in the denominator, a rising interest rate raises debt service and pushes DSCR down even though the property's income has not changed at all. A deal underwritten comfortably at 1.35x when rates were lower can fail a 1.25x test at refinance with identical operations, which is the mechanism behind most refinance distress in commercial real estate.
Lenders do not all divide the same income figure. Freddie Mac's glossary defines the ratio on net operating income, Fannie Mae's on net cash flow, which is NOI less a replacement reserve, and the CMBS industry glossary allows either. A DSCR is only comparable with a minimum computed on the same basis.
Sources: Freddie Mac Multifamily Seller/Servicer Guide, Glossary and List of Commonly Used Acronyms (10/20/26) (opens in a new tab), Glossary, “Debt Coverage Ratio”, p. 10; Fannie Mae Multifamily Selling and Servicing Guide (opens in a new tab), Glossary, “Debt Service Coverage Ratio”; CRE Finance Council, Glossary of Terms: Commercial Mortgage-Backed Securities (2014) (opens in a new tab), “Debt Service Coverage Ratio (DSCR)”, p. 9 (PDF page 10)
DSCR is also the constraint that most often determines loan size. Lenders test a proposed loan against several limits at once and lend the smallest result. In a low-rate environment loan-to-value usually binds; when rates rise, DSCR takes over, and proceeds fall even when the property's value and income are unchanged.
Worked example
A stabilized multifamily property produces $600,000 of net operating income. The proposed loan is $6,500,000 at a 6.5% interest rate on a 30-year amortization schedule, which produces a monthly payment of $41,084.
| Step | Calculation | Result |
|---|---|---|
| Annualize the debt service | $41,084 × 12 | $493,008 |
| Divide NOI by annual debt service | $600,000 ÷ $493,008 | 1.217x |
| Find the break-even NOI decline | 1 − (1 ÷ 1.217) | 17.8% |
At 1.217x this loan fails a typical 1.25x minimum. The lender will not decline the deal outright; it will reduce proceeds until the test passes. Solving backwards, the maximum debt service the property supports at 1.25x is $600,000 ÷ 1.25 = $480,000 per year, or $40,000 per month, which at the same rate and amortization supports a loan of roughly $6,328,000. The borrower's $6.5 million request becomes a $6.328 million approval: a $172,000 equity gap created by a ratio, not by the property.
Typical ranges
| Context | Typical minimum DSCR | Why it sits there |
|---|---|---|
| Stabilized multifamily | 1.20x – 1.30x | Deep tenant pool and short leases make income resilient, so lenders accept a thinner cushion. |
| Stabilized office and retail | 1.25x – 1.35x | Longer leases concentrate risk in fewer tenants; a single departure moves NOI sharply. |
| Stabilized industrial | 1.20x – 1.30x | Long leases to credit tenants and low operating complexity. |
| Hospitality | 1.35x and above | Revenue reprices nightly and is highly sensitive to the economic cycle. |
| Single-tenant net lease, investment-grade | 1.15x – 1.25x | Credit of the tenant substitutes for diversification of income. |
| Bridge and transitional loans | Below 1.00x at close | Sized to stabilized income, with an interest reserve funding the gap until lease-up. |
How it compares
| Metric | What it measures | What it misses |
|---|---|---|
| DSCR | Income against the actual loan payment | Depends on rate and amortization, so it flatters low-rate, interest-only structures. |
| Debt Yield | Income against the loan amount, ignoring rate and term | Says nothing about whether the current payment is affordable. |
| LTV | Loan against appraised value | Value is an opinion that moves with cap rates; income is observable. |
| Debt Constant | Annual debt service against loan amount | A pricing input rather than a credit test on its own. |
Common mistakes
- Comparing DSCRs built on different income figures
- Freddie Mac defines the ratio on net operating income and Fannie Mae on net cash flow, which also deducts a replacement reserve, so the same loan shows a lower DSCR on Fannie Mae's basis. Before comparing a DSCR with a lender's minimum, confirm which income figure that lender uses.
Sources: Freddie Mac Multifamily Seller/Servicer Guide, Glossary and List of Commonly Used Acronyms (10/20/26) (opens in a new tab), Glossary, “Debt Coverage Ratio”, p. 10; Fannie Mae Multifamily Selling and Servicing Guide (opens in a new tab), Glossary, “Debt Service Coverage Ratio”; CRE Finance Council, Glossary of Terms: Commercial Mortgage-Backed Securities (2014) (opens in a new tab), “Debt Service Coverage Ratio (DSCR)”, p. 9 (PDF page 10)
- Using interest-only payments when the loan amortizes later
- An interest-only period flatters DSCR. Lenders commonly test coverage on the fully amortizing payment, and sometimes at a stressed constant above the contract rate.
- Omitting a management fee because the owner self-manages
- Underwriters add a market management fee (typically 3% to 5% of effective gross income) whether or not it is actually paid, because the next owner will pay it.
- Treating DSCR as fixed for the loan term
- It moves every year with rents, expenses and, at refinance, with prevailing rates.
Frequently asked questions
- What is a good DSCR?
- For stabilized commercial property, most lenders require a minimum between 1.20x and 1.35x depending on property type. Multifamily and industrial commonly sit at 1.20x to 1.30x, office and retail at 1.25x to 1.35x, and hospitality at 1.35x or higher. Single-tenant properties leased to investment-grade credit may be accepted nearer 1.15x to 1.25x.
- What does a DSCR of 1.25 mean?
- It means the property's net operating income is 1.25 times its annual debt service. The property could lose 20% of its net operating income and still cover loan payments exactly, because 1 divided by 1.25 equals 0.80.
- What happens if DSCR is below 1.0?
- The property does not generate enough income to cover its loan payments, and the shortfall must be funded from the owner's other resources or from a reserve. Conventional lenders will not originate at that level; bridge lenders sometimes will, sizing the loan to projected stabilized income and funding the gap with an interest reserve.
- How do you increase DSCR?
- Either raise net operating income or lower annual debt service. Raising income means higher rents, better occupancy or lower operating expenses. Lowering debt service means borrowing less, extending the amortization period, or obtaining a lower interest rate. Borrowing less is the lever lenders apply themselves when a deal fails the test.