Use this free DSCR loan calculator to estimate a rental property’s debt service coverage ratio, PITIA, monthly loan payment, and potential borrowing power for a purchase or refinance.

DSCR Loan Calculator

This calculator provides an educational estimate, not a rate quote, loan offer, or commitment to lend. Final eligibility, documentation, pricing, DSCR treatment, LTV, reserves, and terms depend on underwriting and applicable program guidelines.

How to Use This Calculator

Select the transaction and rental strategy, then enter the qualifying rent, loan terms, and monthly expenses. The estimates update with each change.

Choose Your Scenario

Selection What to Choose
Transaction Select Purchase for a new loan or Refinance for a property you own.
Rental Strategy Select Long-term Rental or Short-term Rental.

Enter the Property and Loan Information

Field What to Enter
Qualifying gross monthly rent Enter the monthly rent supported by the lease or appraisal you expect the lender to use. Do not enter projected rent based on future improvements. For an early estimate, use the

Free Rent Estimator
.
Loan amount Enter the amount you plan to borrow for the purchase or refinance.
Illustrative interest rate Enter the interest rate you want the calculator to use when estimating the payment and DSCR. You can use a hypothetical rate to compare scenarios, but the result is not a rate quote.
Loan structure Select a 15-, 20-, 25-, 30-, or 40-year term and choose an amortizing or interest-only payment. The interest-only option calculates the payment using only the interest due at the entered rate. Availability and qualification requirements depend on the loan program and complete borrower scenario.
Property taxes / month Enter the property’s monthly tax amount. Divide the annual estimate by 12 if needed.
Insurance / month Enter the monthly property-insurance amount. Do not include flood insurance if you enter it separately below.
HOA / month Enter the monthly HOA or association dues. Use $0 if the property has none.
Flood insurance / month Enter the monthly flood-insurance amount, if applicable. Use $0 if it does not apply.

Review the Results

Result What It Shows
Estimated DSCR Qualifying rent divided by PITIA, shown within the Fair, Good, Excellent, or Best range.
Estimated PITIA Total principal and interest, taxes, insurance, flood insurance, and HOA dues.
Monthly loan payment Principal and interest based on the selected term and payment type.
Estimated DSCR buying power Illustrative loan amounts supported at a 1.25 and 1.00 DSCR.

How DSCR Is Calculated

Griffin Funding calculates debt service coverage ratio using this formula:

DSCR = Gross Monthly Rental Income ÷ Monthly PITIA (Principal, Interest, Taxes, Insurance, Association dues)

PITIA includes principal and interest, property taxes, insurance, and homeowners association dues when applicable. A ratio of 1.00 means the gross rent exactly equals PITIA. Above 1.00, the property’s monthly rent exceeds its monthly expenses; below 1.00, the property’s income does not fully cover the monthly expenses.

DSCR Calculation Example

Suppose an investor finances $300,000 with a fully amortizing 30-year loan at an illustrative 7.00% interest rate. The property produces $3,000 in qualifying gross monthly rent.

Monthly calculation Amount
Principal and interest $1,996
Property taxes $367
Insurance $167
HOA dues $120
Flood insurance $0
Total PITIA $2,650
Gross monthly rent $3,000

DSCR = $3,000 ÷ $2,650 = 1.13

A 1.13 DSCR means the property’s monthly rent is 13% higher than its monthly PITIA, placing it in the calculator’s
Excellent range, which includes ratios between 1.00 to 1.24.

Keep in mind that DSCR does not account for maintenance, management, utilities, repairs, vacancy losses, or other operating expenses, so it does not provide a complete measure of the property’s profitability.

DSCR Calculator Methodology

The calculator uses the loan amount, illustrative rate, term, and payment type to estimate the loan payment. It adds taxes, insurance, flood insurance, and HOA dues to calculate PITIA, then divides qualifying rent by PITIA. It also works backward from the inputs to estimate supported loan amounts at a 1.25 and 1.00 DSCR.

The calculation excludes maintenance, management, utilities, repairs, and vacancy. Appraisal and underwriting determine the final qualifying figures and terms.

What Counts as a Good DSCR?

The calculator places the estimated ratio into four ranges

Estimated DSCR Calculator Range What the result generally means
Below 0.75 Fair Requires closer review; reserves-based or no-ratio options may be available
0.75 to 0.99 Good Rent doesn’t fully cover PITIA, but the loan may still qualify with sufficient reserves
1.00 to 1.24 Excellent Rent covers PITIA; the property may qualify through standard DSCR options
1.25 or higher Best Rent provides a larger cushion above PITIA and may support stronger pricing

 

The labels explain the estimate but do not constitute approval or promise particular pricing. Many lenders look for at least 1.25, but Griffin Funding has no minimum DSCR requirement. Loans below 1.00 may qualify when reserves and equity support the transaction, and no-ratio programs are available.

In July 2026, Griffin Funding closed DSCR loans with ratios ranging from 0.70 to 2.23, including two below 1.00. Your ratio can affect pricing, down payment, and reserve requirements, but it is not the only part of the loan decision. Learn more about what is a good DSCR ratio.

Gross Rent vs. NOI: Why Calculators Produce Different Ratios

Not every lender uses the same DSCR formula. Griffin Funding divides the property’s gross qualifying rent by PITIA. Some lenders first subtract operating expenses and vacancy from gross rent, then use net operating income, or NOI, as the numerator.

An NOI-based calculation produces a lower ratio because it starts with less income. 

For example, the example property above has a 1.13 DSCR using $3,000 in gross monthly rent. A calculator that first subtracts management, maintenance, or vacancy expenses will return a lower ratio even though the property, rent, and loan have not changed.

Before comparing calculator results, check whether each calculator uses gross rent or NOI. A calculator that uses NOI will usually show a lower DSCR for the same property.

How to Improve a Low DSCR

If the estimated ratio is lower than expected, focus on the inputs that affect gross rent or PITIA:

  • Confirm the qualifying rent: Compare the current lease with the appraiser’s market-rent analysis. Depending on the property and program, the qualifying rent may not be the amount currently collected.
  • Make a larger down payment: Borrowing less reduces the principal-and-interest payment the rent must cover.
  • Test a longer loan term: Enter 40 instead of 30 in the Loan Term field to estimate how a fully amortizing 40-year payment would affect the DSCR.
  • Review the estimated rate: A lower interest rate reduces the principal-and-interest payment.
  • Check taxes and insurance: Confirm the property’s expected tax treatment and obtain an appropriate landlord-insurance estimate before relying on the result.
  • Interest Only: Switch the payment type to interest-only to see how removing principal changes the ratio.

Current property owners may also consider a DSCR cash-out refinance or DSCR HELOC/HELOAN to access equity in a rental property.

Run Your Numbers With a Loan Officer

A calculator provides a useful first estimate. A loan officer can determine which rent figure, loan structure, and program apply to the property.

Griffin Funding offers DSCR loans from $100,000 to $4.5 million, with no universal minimum DSCR. Qualifying loans have closed in as few as six days, and the average closing time is 34 days. Borrowers qualify without tax returns, W-2s, pay stubs, or a personal debt-to-income calculation.

Request a DSCR Loan Quote

Need to run a different mortgage scenario? Explore Griffin Funding’s different mortgage calculators .

Find the best loan for you. Reach out today!

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Frequently Asked Questions

How do you calculate a DSCR loan?

Divide the property’s gross monthly rental income by its monthly PITIA. PITIA includes principal, interest, property taxes, insurance, and HOA dues when applicable. For example, $3,000 in rent divided by $2,650 in PITIA produces a 1.13 DSCR.

Do DSCR loans require 20% down?

Not always. A 20% down payment is typical, but Griffin Funding may approve a DSCR loan with 15% down for a qualifying borrower with a credit score of 740 or higher. The required down payment depends on credit, property type, loan amount, DSCR, and the selected program.

What is the downside of a DSCR loan?

DSCR loans may require a larger down payment or more reserves than owner-occupied financing. Rates may also be higher, and some programs carry prepayment penalties.
The calculated ratio does not measure the property’s actual profit because it excludes operating expenses. When weighing the DSCR pros and cons, compare the easier income documentation with the loan’s complete cost, reserve requirement, and prepayment terms.

Is it hard to qualify for a DSCR loan?

DSCR loans can be easier for investors who cannot document income conventionally to qualify, because qualification does not rely on tax returns, W-2s, pay stubs, or a personal debt-to-income ratio.
The lender will still review credit, liquidity, property eligibility, appraisal, rental income, and the proposed loan structure. Depending on the program, borrowers may also be able to get a DSCR loan through an LLC.

Does Griffin Funding use gross rent or NOI?

Griffin Funding uses gross qualifying rent. It divides monthly rent by PITIA without subtracting maintenance, property management, utilities, repairs, or vacancy. Some lenders use NOI instead, so their calculators may return a lower ratio for the same property.

Can I calculate DSCR for a 40-year or interest-only loan?

Yes to both. Enter 40 in the Loan Term field to estimate a fully amortizing 40-year payment, or select interest-only under Loan structure to calculate the payment using only the interest due at your entered rate. Because the DSCR is computed against PITIA, the interest-only setting shows how dropping principal from the payment raises the ratio, often the difference between a marginal deal and one that clears. Interest-only availability and terms depend on the loan program, so ask a Griffin Funding loan officer whether the option applies to your scenario.

Is DSCR calculated using actual rent or market rent?

It can use either, depending on the property and program. For a leased property, underwriting may compare the current lease with an appraiser’s market-rent analysis and use the permitted qualifying figure. A vacant or newly purchased property generally relies on the appraiser’s comparable rent schedule.
Short-term rentals may use documented rental history or approved market data, depending on the program. Ask your loan officer which rent figure will apply before ordering the appraisal.

Bill Lyons is the Founder, CEO & President of Griffin Funding. Founded in 2013, Griffin Funding is a national boutique mortgage lender focusing on delivering 5-star service to its clients. Mr. Lyons has 25 years of experience in the mortgage business. Lyons is seen as an industry leader and expert in real estate finance. Lyons has been featured in Forbes, Inc., Wall Street Journal, HousingWire, and more. As a member of the Mortgage Bankers Association, Lyons is able to keep up with important changes in the industry to deliver the most value to Griffin's clients. Under Lyons' leadership, Griffin Funding has made the Inc. 5000 fastest-growing companies list six times in its 12 years in business. Follow his updates on LinkedIn.