What DSCR Actually Measures
The debt service coverage ratio divides a property's income by the cost of carrying its debt. A ratio of 1.00 means the property earns exactly enough to pay its housing obligation with nothing to spare. Above 1.00, there is a cushion; below 1.00, the property does not cover itself and the shortfall comes out of your pocket every month. Because a DSCR loan is underwritten to the property rather than to your personal income, this one ratio does most of the work a pay stub and tax return would do for a conventional mortgage.
The formula this calculator uses is straightforward:
PITIA is the full monthly housing cost: Principal and Interest on the loan, plus one-twelfth of annual Taxes, one-twelfth of annual Insurance, and any monthly Association dues. Leaving out taxes and insurance is the most common way investors flatter a deal — a property that looks like it covers on principal and interest alone can slip under 1.00 once the escrow items are added back. This tool takes annual taxes and insurance and divides each by twelve so the ratio reflects the real monthly obligation.
How to Read Your Result
Lenders set their own minimums, but three reference bands are widely used across the industry as a way to talk about strength:
- 1.25 or higher — strong. The rent covers the payment with roughly a quarter of the income to spare. This is comfortable coverage that absorbs a rent dip, a vacancy month, or a tax reassessment without turning the property negative.
- 1.00 to 1.25 — tight but positive. The property covers itself, but the margin is thin. A single surprise — a special assessment, an insurance increase, a few weeks of vacancy — can push it underwater. Deals in this band often still finance, sometimes at different terms, but they leave little room for error.
- Below 1.00 — negative coverage. The rent does not cover the debt. You are subsidizing the property monthly, and most rental programs will not lend against it without a larger down payment, a lower loan amount, or higher rent. It can still make sense as a value-add or appreciation play, but it is not a self-supporting rental as underwritten.
These are general benchmarks for reading the number, not RECR's program threshold. The actual minimum ratio for any specific rental structure is confirmed against the current program sheet: {{CLAIM:dscr.min_ratio}} — confirming. What the calculator gives you is the ratio itself, cleanly and honestly, so you know where a deal stands before anyone underwrites it.
A Worked Example
Take the default numbers. A property rents for $1,850 a month. Principal and interest run $980. Annual taxes are $3,200, or about $267 a month; annual insurance is $1,400, or roughly $117 a month; there are no HOA dues. Monthly PITIA is therefore about $1,363. Divide $1,850 by $1,363 and the DSCR is 1.36 — a strong result, with roughly $487 of monthly cushion after the full payment. Now raise the taxes to $6,000 a year and the ratio falls toward 1.20; the same property in a higher-tax jurisdiction is a materially different loan. That sensitivity is exactly why taxes and insurance belong in the calculation from the start.
Where DSCR Fits in an Investor's Toolkit
DSCR tells you whether a rental covers its debt, but it does not tell you what you actually take home. For that, run the same property through the cash flow calculator, which subtracts management, maintenance, vacancy, and reserves rather than stopping at PITIA. A deal can clear a healthy DSCR and still be thin on true cash flow once those real costs are honest. For income properties valued on their yield rather than their coverage — small commercial and larger multifamily — the cap rate calculator is the better first screen. And when a rental clears the ratio and you are ready to move, the rental and DSCR financing program is the path built for exactly these deals.
If you want the concept in more depth — how lenders treat gross versus net rent, how vacancy factors in, and why the ratio behaves the way it does — read DSCR explained for real-estate investors. When your numbers hold up, the next step is a real read on the deal.