How this DSCR calculator works
A DSCR loan qualifies the property, not you. The lender ignores your W-2s and tax returns and asks one question: does the rent cover the mortgage payment? This calculator answers that question the same way an underwriter does.
It builds the full monthly payment (principal, interest, taxes, insurance and any HOA dues, together called PITIA) from your inputs, then divides gross rent by that number. The result is the debt service coverage ratio, or DSCR.
It also runs the math backwards. Given your rent, it solves for the biggest loan that still hits the lender's minimum ratio, and it tells you the rent you would need at your current loan amount. Those two numbers are what you negotiate with. The monthly cash flow it reports is rent minus that full payment, the margin the ratio is measuring.
The DSCR formula lenders use
DSCR = monthly gross rent / (principal + interest + taxes + insurance + HOA)
Using the calculator's default scenario: a $500,000 property with 25% down at 7.5% over 30 years has a principal and interest payment of $2,622. Add $500 in taxes and $208 in insurance and PITIA is $3,330. Rent of $4,000 divided by $3,330 gives a DSCR of 1.20.
That property covers its payment with about $670 a month to spare, but it sits under the 1.25 line many lenders use for their best pricing. Rent would need to be $4,163 to get there, or the down payment would need to rise to about $143,648.
Note what is missing from the formula: vacancy, repairs and management. Residential DSCR lenders use gross rent, which makes qualifying easier and means the ratio flatters the property compared with what you will actually keep. Read the full breakdown in how to calculate DSCR.
Net operating income and the commercial mortgage version of DSCR
DSCR started in commercial mortgage underwriting, where it is net operating income divided by annual debt service. NOI is rent after vacancy and every operating expense, so the commercial ratio is stricter, and lenders on commercial property usually require 1.20 to 1.40.
Run the default property the commercial way, with 5% vacancy and 18% of collected rent for management, maintenance and reserves, and NOI is about $29,000 against $31,500 of annual debt service: a DSCR near 0.90. The same property scores 1.20 on the residential formula. Both are correct. They measure different things, and the residential one is the number a DSCR lender will quote you.
What is a good DSCR for a loan?
A DSCR of 1.25 or higher is good. A ratio between 1.0 and 1.24 will usually close but with a higher rate or a lower loan-to-value. Anything under 1.0 means the rent does not cover the payment, and only some lenders will lend at all.
| DSCR | What it means | Typical lender response |
|---|---|---|
| 1.25+ | Rent is at least 25% above the payment | Best rate tier, max LTV (often 75 to 80%) |
| 1.00 to 1.24 | Rent covers the payment with a thin cushion | Approved with a rate adjustment or lower LTV |
| 0.75 to 0.99 | Rent falls short of the payment | Some lenders, higher rate, usually 65 to 70% LTV max |
| Under 0.75 | Property loses money every month before expenses | No-ratio programs only, priced accordingly |
Each ratio has its own page with worked numbers. Start with what a 1.25 DSCR means or what a 1.0 DSCR means, or read what counts as a good DSCR.
How to raise a low DSCR
Every lever moves one side of the fraction. The calculator shows the exact dollar effect of each.
- Put more down. A smaller loan means a smaller payment. The "minimum down payment" figure shows the amount that hits your target ratio.
- Buy down the rate. Paying points to cut the rate by half a percent lowers the payment on a $375,000 loan by roughly $125 a month.
- Switch to interest only. IO periods of 5 to 10 years are common on DSCR loans and can add 0.10 to 0.15 to the ratio.
- Document higher rent. If the lease is below market, a new lease or a supported appraiser rent estimate raises the numerator.
- Shop the insurance. Insurance sits inside PITIA. A $600 annual saving is $50 a month straight into the ratio.
- Challenge the tax estimate. Lenders sometimes estimate taxes off the purchase price. If the assessed value is lower, show them.
DSCR loan requirements at a glance
Requirements vary by lender because DSCR loans are non-QM products with no agency rulebook. The ranges below are typical for 2025 and 2026 programs. Confirm specifics with any lender you are comparing.
| Minimum DSCR | 1.0 at most lenders, 1.25 for best pricing, 0.75 with some |
| Down payment | 20 to 25% on a purchase, 25 to 30% for cash-out |
| Credit score | 620 to 680 minimum, 740+ for the top tier |
| Income documents | None. No tax returns, W-2s or DTI |
| Reserves | Usually 3 to 6 months of PITIA |
| Property types | 1 to 4 unit rentals, condos, many allow short-term rentals |
| Borrower | Individual or LLC, first-time investors accepted by some |
| Prepayment penalty | Common. Often 3 to 5 years, step-down or flat |
The full list, with the exceptions, is in DSCR loan requirements.