A DSCR loan calculator shows whether a rental’s rent covers its monthly mortgage cost with enough room for a lender to approve financing. This free DSCR loan calculator divides expected monthly rent by the full payment (principal, interest, taxes, insurance and HOA, known as PITIA), then reports the ratio, cash flow, cash to close and the largest loan the rent supports at a 1.25 ratio. A property’s debt service coverage ratio is the number most DSCR lenders use to qualify rental properties instead of personal income, so running it before calling a mortgage broker shows where a deal stands.
Calculate your Debt Service Coverage Ratio and see how much you can borrow.
How the DSCR Loan Calculator Gets Its Number
The tool uses the lender version of the debt service coverage ratio formula: monthly rent divided by monthly PITIA, a test of whether the income a property generates covers its debt obligations. Rent is gross, before vacancy, repairs or property management. Most lenders use DSCR this way for one-to-four unit rentals, and it differs from the commercial version, which divides net operating income by annual debt service. The full comparison, with a fourplex example and thresholds by property type, is in the guide to what DSCR means in real estate. Unlike a standard mortgage calculator, this tool starts from rent rather than from the price you can afford.
A DSCR of 1 means rent exactly equals the payment. Above that, a DSCR of 1.25 is the line that matters most: Fannie Mae uses it as a standard minimum in its multifamily underwriting, and many investment property lenders price their best tier from the same figure. That 25% cushion protects both borrower and creditor if rental income dips during a vacancy or if property tax and insurance costs climb.
Where to Find the Real Number for Each Input
Every required field loads with a default, and the three expense fields estimate themselves when left blank (enter 0 for a true zero). Defaults are fine for a first look. Numbers a lender will accept come from documents.
| Input | What the calculator does with it | Where the real figure comes from |
|---|---|---|
| Transaction type | Purchase uses a down payment; both refinance options use a target LTV | Your deal |
| Property value | Default $300,000 | Contract price, or a recent appraisal for a refinance |
| Expected monthly rent | Default $2,500, gross | A signed lease, or comparable listings within a half-mile radius; lenders use the appraiser’s rent schedule |
| Credit score | Default 720-739 band | The middle of your three bureau scores |
| Down payment % | Default 25%, accepts 15 to 50 | Your lender’s minimum for your score |
| Current balance and target LTV | Refinance only; LTV accepts 50 to 80 | Payoff statement from your servicer |
| Interest rate | Default 7.5% | A written quote; compare current interest rates first |
| Loan structure | 30-year fixed or one of three interest-only options | The loan term and interest-only period you are quoting |
| Annual property taxes | Blank = 1.2% of value | County tax bill or assessor website |
| Annual insurance | Blank = 0.5% of value | A landlord (dwelling fire) policy quote, not a homeowner policy |
| Monthly HOA dues | Default $0 | HOA resale disclosure or the listing |
Taxes are the input most likely to flatter a deal. In many states the assessed value resets after a sale, so the seller’s last bill can understate what a new owner pays. When in doubt, multiply the purchase price by the local tax rate instead of copying the listing’s tax history.
Reading the Results Panel
After you click Calculate DSCR, nine figures appear along with a gauge:
- DSCR Ratio: rent divided by PITIA, to two decimals.
- Loan Amount: value minus the down payment, or value times the target LTV on a refinance, capped at the maximum LTV for your credit band. On a rate-and-term refinance the new loan is the lower of that figure and your current balance; a cash-out refinance also reports the cash taken out before closing costs.
- Monthly P&I and Monthly PITIA: the monthly mortgage payment alone, then the full monthly expenses with taxes, insurance and HOA added.
- Monthly and Annual Cash Flow: rent minus PITIA, with no reserve for vacancy or repairs.
- Est. Cash to Close: down payment plus closing costs, 3% of the amount borrowed by default (adjustable in the closing costs field).
- Max Loan @ 1.25 DSCR: the largest balance the rent supports (explained below).
- Cash-on-Cash Return: annual cash flow divided by cash to close on a purchase. It shows N/A on a refinance, because the tool does not know how much cash is already in the property.
The gauge sorts the ratio into five tiers built into the calculator’s code:
| Tier | Ratio | What the panel says |
|---|---|---|
| Prime | 1.25 and up | Best rates and terms available |
| Preferred | 1.10 to 1.24 | Good rates, standard terms |
| Standard | 1.00 to 1.09 | Higher rates, possible restrictions |
| Limited | 0.75 to 0.99 | Few lenders, premium pricing |
| Below Threshold | Under 0.75 | Most lenders will decline |
A qualification panel also compares your loan-to-value ratio with the maximum for your credit band (80% at 720 and above, 75% at 680 to 719, 70% at 660, 65% at 640) and caps the loan at that limit if you ask for more. On a cash-out refinance, each band’s limit is 5 points lower. Don’t stop at the ratio, though. A property could show a healthy 1.35 coverage yet deliver a mediocre 4% return on the cash actually invested.
Worked Example With the Default Inputs
This illustrative scenario uses the values the tool loads with: a $300,000 purchase, $2,500 rent, 720-739 credit, 25% down, 7.5% on a 30-year fixed, taxes and insurance left blank, no HOA. Every figure below comes from the calculator’s own formulas.
- Loan amount: $300,000 minus $75,000 down = $225,000.
- Monthly P&I: $1,573.23.
- Estimated taxes: 1.2% of $300,000 = $3,600 a year, or $300 a month. Estimated insurance: 0.5% = $1,500 a year, or $125 a month.
- PITIA: $1,573.23 + $300 + $125 = $1,998.23.
- DSCR: $2,500 ÷ $1,998.23 = 1.25 (Prime).
- Cash flow: $501.77 a month, $6,021.21 a year.
- Cash to close: $75,000 + $6,750 (3% of $225,000) = $81,750, for a 7.37% cash-on-cash return.
The unrounded ratio is 1.2511, so the default deal clears 1.25 by about $2 of monthly rent. Any real tax bill or insurance quote above the estimates drops it into the Preferred tier.
What Changes When You Move Each Input
Each row below changes one input from the default example and leaves everything else alone, which is how a real estate investor can see which assumption a deal is most sensitive to.
| Change | DSCR | Max loan @ 1.25 | Monthly cash flow |
|---|---|---|---|
| None (default) | 1.25 | $225,253 | $502 |
| Rent $2,700 | 1.35 | $248,136 | $702 |
| Rent $2,400 | 1.20 | $213,811 | $402 |
| 30% down | 1.32 | $225,253 | $607 |
| Rate 6.5% | 1.35 | $249,182 | $653 |
| Any interest-only option | 1.37 | $252,000 | $669 |
| Taxes $4,800 a year | 1.19 | $210,951 | $402 |
| HOA $150 a month | 1.16 | $203,800 | $352 |
| Credit 640-659 | 1.25 | $225,253 | $502 |
- Rent moves both the ratio and the max loan. Here, $100 a month is the difference between 1.20 and 1.25.
- Down payment raises the ratio but never the max loan, because the max loan depends only on rent, rate, structure and expenses.
- Interest-only options (5 or 10 years, plus the 40-year term) qualify on the interest-only payment, which is how many DSCR lenders size these loans. The panel also shows the payment and ratio once principal starts: after a 5-year interest-only period, the same $225,000 amortizes over 25 years at $1,662.73 a month, which is higher than the 30-year fixed payment.
- Expenses hit the max loan hard: every extra $100 a month of tax, insurance or HOA cuts it by about $14,300 at 7.5% over 30 years.
- Credit score sets the maximum LTV. The panel also shows typical pricing for your band against a 740 baseline (from minus 0.25% at 760+ to plus 1.50% at 640-659), but the payment uses the rate you enter, so type in a quote that already reflects your credit.
How the Maximum Loan Amount at 1.25 Is Calculated
The maximum loan amount works backward from rent. Divide rent by 1.25 to get the highest PITIA a lender would accept, subtract monthly taxes, insurance and HOA to find the largest monthly payment for principal and interest, then convert that payment to a loan balance at your rate and term. With the defaults: $2,500 ÷ 1.25 = $2,000, minus $300 and $125 leaves $1,575 of P&I, which supports $225,253 at 7.5% over 30 years.
Using the DSCR Loan Calculator Max Loan Figure to Size an Offer
Two limits cap borrowing: the rent-based figure and the LTV cap for your credit band. The lower one wins. Divide the max loan by the LTV you plan to borrow at to find the highest price that still works: $225,253 ÷ 0.75 = about $300,337 at 25% down. If the seller wants more, the gap has to come from extra cash, higher rent or lower expenses. On interest-only DSCR loans, ask whether the lender qualifies on the interest-only payment or the amortizing one, because the tool assumes the former.
What Ratio Lenders Actually Accept
There is no single acceptable DSCR. Most programs require a minimum of 1.25 for standard purchases. Some lenders approve borrowers at 1.0 if the credit score is above 720 and the borrower puts down 25% or more. Others set a 1.50 floor for cash-out refinancing. A single-family rental in a stable market might qualify at 1.20, while a short-term rental with seasonal income swings may need 1.40. A higher DSCR generally means better loan terms and a larger approved amount. Ask each loan officer for the published DSCR threshold and test scenarios against that number rather than the gauge colors.
What the Calculator Leaves Out
- Vacancy, repairs and management are not deducted, so cash flow is a ceiling, not a forecast. There is no capitalization rate either, which measures a property’s return independent of financing.
- Rehab budgets and after-repair value are outside the scope of this DSCR calculator; the BRRRR calculator handles those deals.
Start by replacing the three estimates with real figures: the county tax bill, a landlord insurance quote and the HOA disclosure. Then enter a quoted rate adjusted for your credit band and run the DSCR loan calculator again to calculate the ratio a lender will see. If a low DSCR lands under your lender’s minimum, compare the max loan to the amount you planned to borrow to see how much extra down payment or rent closes the gap. For refinance-specific modeling, use the refinance tool.
Frequently Asked Questions
What does a ratio of 1.0 mean?
It means income exactly equals the debt payments: rent equals PITIA in this calculator, or net operating income equals total debt service in the commercial formula. There is no surplus. Any unexpected expense, vacancy, or rent reduction would put you in the red. Lenders view this as the breakeven point, not a safe margin.
How much can I borrow with a DSCR loan?
You can borrow the lower of two figures: the loan the rent supports at the lender’s minimum ratio and the LTV cap for your credit score. With the default inputs, the rent supports $225,253 at 1.25, while 80% of $300,000 is $240,000, so rent is the binding limit at $225,253.
How much do I need for a down payment?
Most programs require 20% to 25% down on investment properties. A few accept 15% for borrowers with credit scores above 740. The more you put down, the smaller the financed portion and the stronger your ratio becomes.
Can I use rental income from a property I haven’t purchased yet?
Yes. Lenders typically accept a rent schedule or appraisal-based rent estimate. The key is that the projected income must be realistic, usually backed by comparable rental data in the same market. An inflated projection will hurt you during underwriting.
Do short-term rentals qualify?
Many lenders now accept Airbnb and VRBO income when documented properly. They may average the past 12 months of revenue or use a third-party income projection. Expect a higher threshold (often 1.30 to 1.50) because short-term rentals carry more revenue volatility than long-term leases.