DSCR stands for Debt Service Coverage Ratio. It measures one simple thing: does the rent the property collects cover the full cost of its loan? It's the single number a DSCR lender uses to decide whether — and on what terms — to finance an investment property. Because the property qualifies on its own cash flow, there are no tax returns, no W-2s, and no personal debt-to-income calculation.
The ratio this calculator returns is not a pass/fail — it is a price. What 1.0, 1.25 and 1.50 actually mean for your rate shows the payment difference at each tier, and why the coverage you close at moves your refinance proceeds more than any rent forecast explains which input is worth arguing about.
If a property rents for $3,900/month and the all-in monthly loan cost (PITIA) is $3,367, the DSCR is 1.16.
What is PITIA?
PITIA is the all-in monthly cost of carrying the loan. It is the denominator in every DSCR calculation (both DSCR and PITIA are defined in the DSCR glossary):
- P — Principal: the portion of the amortized payment that pays down the balance.
- I — Interest: the interest portion of that same payment, based on your rate and term.
- T — Taxes: monthly property taxes.
- I — Insurance: hazard / landlord insurance (and flood, where required).
- A — Association dues: any HOA or condo fees.
Not sure what rate to enter? The current DSCR loan rates by program are published with an as-of date, so you can start from a real figure rather than a guess — and see which adjusters would move your own file inside the range.
The calculator above uses the fully amortized principal-and-interest payment for your rate and term, adds taxes, insurance, and HOA, and divides your gross monthly rent by that total. Operating costs like management, vacancy, and maintenance matter for your own returns — but they aren't part of the lender's PITIA-based DSCR. The qualifying ratio is rent ÷ PITIA, full stop. That's exactly how DSCR loans are underwritten, and it's why the number you see above is the number that matters at the closing table.