DSCR Calculator

The DSCR formula

DSCR = NOI ÷ annual debt service. NOI is rent minus operating expenses; debt service is one year of mortgage payments. A 1.25 ratio means the property earns its payment 1.25 times over, the 25% lender cushion. At 1.00× it breaks even; below 1.00× it cannot cover its own note.

DSCR = NOI ÷ annual debt service. NOI is rent minus operating expenses; debt service is one year of mortgage payments. A DSCR of 1.25 means the property earns its loan payment 1.25 times over, a 25% cushion that pays for one vacant unit or a bad repair year before the note is at risk. At 1.00× the property is exactly breakeven; below 1.00× it loses money every month it operates.

Worked example

Take a small fourplex: $48,000 a year gross, $18,000 of taxes, insurance, and maintenance, leaving $30,000 of NOI. The $352,000 loan at 6.5% over 30 years costs about $26,699 a year. DSCR equals $30,000 ÷ $26,699, or 1.12: cash-flowing, yet short of the 1.25× lender line.

A small fourplex: $4,000 monthly rent, $48,000 a year gross; $18,000 of taxes, insurance, and maintenance leave $30,000 of NOI. The loan is $352,000 (80% of $440,000) at 6.5% over 30 years, about $2,225 a month, $26,699 a year. DSCR = $30,000 ÷ $26,699 = 1.12. That is a cash-flowing property and still fails the 1.25× test, because rates are punishing: at 5.5% the same loan drops to $23,983 of debt service, a 1.251×, exactly on the 1.25× line rather than clear of it, which is how thin the margin is. The 20% down is what the 1.25× effectively forced you to bring.

Worked example 2: a borderline deal that gets denied

A deal can pass on the quoted rate and still get denied, because the lender underwrites a higher stress rate. Take a $300,000 rental at $2,600 a month: $31,200 gross, $11,200 of expenses, $20,000 of NOI. At 75% LTV the loan is $225,000; the quoted 6.0% over 30 years costs about $1,349 a month, $16,188 a year. DSCR = $20,000 ÷ $16,188 = 1.24, a hair under the line.

Now the stress test. The lender re-runs the same loan at the quoted rate plus 2%, so 8.0%, and the payment climbs to about $1,651 a month, $19,812 a year. DSCR = $20,000 ÷ $19,812 = 1.01. The property works on paper at the quoted rate and fails at the stress rate, which is the number that decides the approval.

The first fix is a larger down payment. Move from 25% to 32% down and the loan drops to $204,000; at the 8.0% stress rate that is about $1,497 a month, $17,964 a year, and DSCR recovers to 1.11. You brought more cash to shrink a payment the stress rate had swollen.

The second fix is an interest-only period. At the 8.0% stress rate, interest-only on the original $225,000 is $1,500 a month flat, $18,000 a year with no principal, so DSCR reads 1.11 without another dollar down. DSCR lenders quote both structures for exactly this reason. The lesson: underwrite the deal at the stress rate, not the quote, and keep both levers in reach.

Case study: refinancing into a DSCR loan

The LTV you want is not always the LTV you qualify for. An investor holds a $350,000 rental with a maturing hard money loan and needs to refinance into a DSCR loan before the note comes due. The property grosses $36,000 a year and carries $13,000 of expenses, leaving $23,000 of NOI.

The ask is 75% LTV, a $262,500 loan at 7.5% over 30 years. That payment is about $1,835 a month, $22,020 a year. DSCR = $23,000 ÷ $22,020 = 1.04. The building cash-flows, but it does not come close to the 1.25× the DSCR lender underwrites to.

The fix is to take less cash out. Drop to 70% LTV and the loan falls to $245,000; at the same 7.5% over 30 years the payment is about $1,713 a month, $20,556 a year. DSCR = $23,000 ÷ $20,556 = 1.12. Better, still short of 1.25×.

To actually clear the bar at this NOI, the loan has to come down to roughly $205,000, about 59% LTV, where the $17,200 annual payment gives DSCR = $23,000 ÷ $17,200 = 1.34. The lesson: on a refinance, coverage is set by how much you borrow against the rent, so size the cash-out to the DSCR, not the other way around.

The 1.25× threshold: why it exists

1.25× is the standard lender screen because a 25% income cushion survives a normal vacancy year plus one bad repair bill. Conventional rental loans want 1.0× or better on market rent; DSCR-specialty products underwrite a hard 1.25× of contract rent, or 1.1–1.2× at a higher rate. Below 1.0× the borrower funds the note personally.

Lenders price the cushion off vacancy statistics. A typical market runs 5–8% empty in any year plus repair spikes, and a 25% NOI buffer survives that. Conventional rental loans use 0.75–1.0× of market rent and want 1.0×+; DSCR-specialty lenders (the "DSCR loan" product) underwrite to a hard 1.25× of contract rent at rate, or offer 1.1–1.2× for a rate bump. A 1.0× deal is a knife-edge: one long vacancy and you are funding the note personally. The same bar applies after a cash-out refinance, on a larger loan: run the new payment through the BRRRR calculator to check coverage at post-refi rent before the lender does.

How to lift DSCR

Four qualification levers, easiest first. Raise rent toward market: each $100 of monthly rent adds about $1,200 to NOI and roughly 0.05 to DSCR at this size. Trim operating expenses the same way. Put more down, since every 5% of extra down cuts debt service about 6%. Or refinance at a lower rate.

Four levers, in order of ease. Raise rent (each $100 of monthly rent adds about $1,200 to NOI and ~0.05 to DSCR at this size). Trim expenses the same way. Put more down, every 5% of extra down cuts debt service ~6%. And refinance when rates drop: DSCR on the same property doubles as its rate sensitivity. The fastest DSCR fix is almost always a rent re-set to market, so verify comps first.

DSCR loan products vs. conventional

The modern DSCR loan underwrites only the property's coverage ratio, skipping income verification entirely. At 1.25× or better you get the standard rate. Between 1.0 and 1.25× most programs price a premium; below 1.0× most decline or demand reserves. Conventional mortgages instead run personal income, DTI, and credit.

The modern "DSCR loan" is a specific product: the lender underwrites only the property's rent coverage, skips income verification entirely, and charges a rate premium (often half a point to a full point) for it. At 1.25× you get the standard rate; at 1.0–1.25× most programs "gross up," charging more rate for thinner coverage; below 1.0× most decline or demand reserves. Conventional loans do the opposite: they check DSCR at 0.75–1.0× of market rent but also demand your personal income, DTI, and credit. A deal can clear conventional (borrower carries the property with salary) or fail it (too much debt), and the reverse for DSCR products. Run both underwritings through the financing fields here: the same inputs produce a rate that qualifies one way and fails the other.

What counts as debt service

DSCR uses the scheduled principal and interest payment, never the hoped-for refinance rate. Property taxes and insurance inside escrow already came out of NOI, so they are not double-counted; mortgage insurance and any second-lien HELOC draws are added to debt service by conservative lenders. Cash-out refinancing replaces the old payment with the new one. The payment itself comes from the standard amortization schedule, and the mortgage calculator prices it from any loan, rate and term, PMI included.

DSCR uses the scheduled principal and interest payment. It excludes mortgage insurance (PMI/FHA MIP, sometimes rolled into debt service by conservative lenders), property taxes and insurance if they sit in an escrow account (they already came out of NOI), and any second-lien HELOC draw payments (yes, add those to debt service: a 20% down plus 10% HELOC is really 70% LTV with two notes). If you refi to cash out, the new payment replaces the old in the denominator. The discipline that matters: never run DSCR on "the rate I hope to refi to." Use the rate that closes today.

Reserves, seasoning, and the exceptions

Lenders soften the 1.25× rule three repeatable ways: reserves, seasoning, and program exceptions. Six to twelve months of payments in the bank gets 1.1× accepted at most DSCR programs, sometimes 1.0×. A refinance after 6–12 months of on-time payments plus a rent bump re-qualifies the same loan. FHA and VA multifamily underwrite differently again.

Lenders soften the 1.25× rule in three repeatable ways, and knowing them changes what you underwrite. Reserves: six to twelve months of payments in the bank gets 1.1× accepted at most DSCR programs and sometimes 1.0×, because the cushion you're missing in income you're showing in cash. Seasoning: refinance after 6–12 months of on-time payments plus a rent bump and the same loan re-qualifies, your DSCR improved without touching the building. Exceptions: FHA and VA multifamily loans underwrite differently again, with owner-occupancy units changing which rent counts. The underwriting lesson: DSCR is not one number, it is a number plus your balance sheet plus your patience, so screen the deal with the strict 1.25×, but negotiate the loan with all three levers on the table.

Lender DSCR vs. investor DSCR: two different numbers

The lender DSCR and the investor DSCR are different ratios on the same property. Most DSCR lenders divide gross rent by PITIA, ignoring management, maintenance, reserves, and vacancy. Investors divide NOI by debt service instead. The same deal can read 1.30 at the bank and 1.05 on your sheet.

A property that clears 1.25 at underwriting and still loses money each month is financeable-and-bad, the most expensive kind of approval: the lender ratio answers whether the loan closes, the investor ratio answers whether the property pays. Check how NOI is built before trusting either number, and judge the surplus with the return on each dollar you put in. To see what that same coverage produces across a full hold, the rental cash flow calculator projects the cash flow and equity year by year.

DSCR below 1.0: what actually happens

A DSCR below 1.0 means the rent cannot cover the loan payment, and you fund the shortfall from elsewhere every month. On most single-property investor loans nothing automatic happens at closing: there is usually no ongoing covenant, unlike commercial debt, so the consequence is practical, not contractual.

Before closing you have three moves: put more down to shrink the payment, switch to interest-only to lower it, or use a no-ratio product that skips the ratio for tighter LTV. After closing the only fixes are raising rent, cutting expenses, or refinancing. First: check the deal on rent versus price in ten seconds, then decide whether the shortfall is worth carrying.

DSCR vs DTI vs LTV: three lender ratios, three jobs

Lenders do not read one number, they read three, and each answers a different question about the same loan. DSCR asks whether the property pays, DTI asks whether you pay, and LTV asks how much of their money is at risk. A deal can pass one and fail another.

These three ratios travel together in every credit file. DSCR is the property's coverage, DTI is your personal load, and LTV is the collateral cushion. Here is what each measures and what it tells you before the underwriter says it.

DSCR loans lean on the first column and relax the second; conventional loans do the reverse. Know which ratio your lender weights before you size the loan.

How DSCR requirements differ by lender type

DSCR requirements vary by lender, not by property, so the same building can pass at one lender and fail at another. The ratio is the lender's risk dial, and each lender type sets it to match how they get repaid. Four broad types price it differently.

Conventional banks writing Fannie and Freddie loans verify your personal income and run DTI alongside the ratio, and they want higher reserves and longer seasoning on rentals. The property's coverage matters, but it is your balance sheet that qualifies, so their DSCR bar reads easier while their documentation reads harder.

DSCR-specialty lenders underwrite the property only. No tax returns, no income verification, a faster close, in exchange for a rate premium and a hard coverage line, usually 1.25× of contract rent, with thinner coverage bought down at a higher rate. The building qualifies, not you.

Hard money and bridge lenders skip the DSCR test entirely. They lend short-term against the value and the exit, charge the most, and expect a refinance or sale to pay them off, which is exactly the situation that sends a borrower shopping for the DSCR loan in the case study above.

Credit unions and portfolio lenders keep the loan on their own books, so they can bend. A relationship, a local property, or strong deposits can get a lower DSCR accepted that a program lender would auto-decline. The rule underneath all four: the building's coverage is fixed, but whose bar it has to clear is a choice you make when you choose the lender.

Three DSCR mistakes that kill loan approvals

Three errors turn an approvable deal into a denial: running the quoted rate instead of the stress rate, dropping the escrow line, and underestimating vacancy. Each one inflates the DSCR you calculate over the one the lender underwrites. Here is what each looks like in real numbers, what it costs, and the fix.

Using the quoted rate instead of the stress rate: a $225,000 loan at a quoted 6.0% costs $16,188 a year against $20,000 of NOI, a comfortable 1.24×. The lender re-runs it at 8.0% and the payment becomes $19,812, a 1.01× that declines. The cost is a denial you did not see coming. The fix: underwrite every deal at the quote plus a 2% stress before you fall in love with it.

Ignoring the escrow line: that same $20,000 NOI assumed taxes and insurance were already out. If the lender instead adds a $4,200 tax-and-insurance escrow to the payment, debt service is $20,388 at the quoted rate and DSCR drops to 0.98, below breakeven on a deal you thought cleared. The fix: confirm whether taxes and insurance sit in NOI or in the payment, and never let them land in neither.

Underestimating vacancy: the lender underwrites market rent at full occupancy, but the property lives in the real world. One vacant month on a $2,600 unit cuts NOI by $2,600 to $17,400, and the real DSCR slides from 1.24 to 1.07 at the quoted rate. The cost is a thinner cushion than your approval letter implied. The fix: run your own DSCR with a vacancy allowance even when the lender does not.

DSCR vs. DTI: property ratio vs. personal ratio

DTI measures you; DSCR measures the property. Debt-to-income compares your personal income against all your debts, and conventional mortgages use it to cap how much you can borrow. DSCR compares the rental income against this property's debt service only, ignoring your salary, your other debts, and your tax returns.

That is why DSCR loans skip income verification: the building qualifies, not the borrower. Judge what the building itself earns with the leverage-free yield before you judge how the loan treats you.