DSCR Investment Property

How DSCR is calculated

The Debt Service Coverage Ratio on a residential DSCR loan is one division:

Rent is the property’s gross monthly rental income (see “what counts as rent” below for where that number comes from). PITIA is the full monthly housing payment: Principal, Interest, property Taxes, Insurance, and Association dues. No personal income, no DTI — the property carries the qualification, which is why DSCR sits in the non-QM product family.

A ratio of 1.25 means the rent covers the payment with 25% to spare. At exactly 1.0 the property breaks even; below 1.0 it runs negative each month, and the loan gets harder — not impossible — to place.

What DSCR do lenders require?

There’s no single rulebook — DSCR is a non-QM product and every lender sets its own bands — but the market clusters into typical tiers:

Below 1.0, the trade is structural: the weaker the ratio, the more the lender wants elsewhere — a lower LTV, more months of reserves, a higher credit score — and the more the pricing reflects the risk. Because the bands and add-ons differ lender to lender, the same sub-1.0 deal can be declined at one shop and priced reasonably at another. That spread is the reason to broker this product rather than walk into a single lender.

What counts as rent

On a purchase, the rent figure usually comes from the appraisal: the appraiser completes a market-rent analysis (Fannie Mae Form 1007 for single-family, Form 1025 for 2–4 unit) estimating what the property rents for in its market. If the property already has an executed lease, most programs use the lower of the lease and the 1007 market rent — a lease above market gets haircut to the appraiser’s number.

On a refinance of a tenanted property, the current lease typically drives the number, sanity-checked against market rent.

Short-term rentals are the nuanced case. Some DSCR programs count STR income using 12 months of actual revenue or market data; many others qualify the property only on its long-term 1007 rent, which is usually lower than what the Airbnb grosses. If your deal only works on STR numbers, program selection is the whole game — confirm how a lender counts STR income before writing the offer.

This calculator lets you enter whichever rent figure your program will use — run it both ways if the lease and market rent differ.

How to improve your DSCR

The rent is largely fixed by the market, so improving the ratio means shrinking the PITIA. Four structural levers, in the order most deals use them:

1. Larger down payment. A lower loan amount cuts the principal-and-interest line directly — often the difference between 0.95 and 1.05 on a marginal deal.
2. Interest-only. Many DSCR programs qualify on the interest-only payment during the IO period, which removes the principal component from PITIA entirely.
3. ARM products. An adjustable with a lower initial rate than the 30-year fixed reduces the qualifying payment. Compare the structures side by side in the ARM vs fixed calculator.
4. Buying down the rate. Paying points for a lower note rate trades upfront cash for a smaller monthly payment — worth modeling whenever the deal is within a few hundredths of a pricing band.

Taxes and insurance are levers too: an accurate insurance quote (instead of a lender’s conservative estimate) and correct tax figures sometimes move a borderline ratio over the line. For the full program landscape around DSCR — bank statement, P&L, foreign national — see the Non-QM pillar, and for 5+ unit properties the math shifts to NOI-based sizing in the Fannie Mae multifamily calculator.