The Quick Read: To run your own numbers, divide the monthly rent a lender will credit by the full monthly payment (principal, interest, taxes, insurance and association dues, known as PITIA), then stress-test the result against lower rent and higher insurance before you pay for an appraisal or write an offer. Ten minutes with a spreadsheet tells you whether a deal is likely to clear a program’s minimum, and which lever to pull if it doesn’t.
- The formula is rent ÷ PITIA, using gross monthly rent, not net income.
- On most files the lender credits the lower of the signed lease and the appraiser’s market rent.
- 1.00 is where many select programs start. A separate select-lender path goes below 1.00, with leverage and terms adjusted.
- Clearing 1.00 does not mean the property cash flows. Repairs, vacancy, management and utilities sit outside the calculation.
- Your number is a readiness check. The lender’s number comes from its own rent figure, insurance quote and program rules.
What Does the DSCR Number Measure?
The debt service coverage ratio (DSCR) compares what a rental property earns to what its financing costs each month. A result of 1.00 means rent equals the full payment. Above 1.00, rent exceeds the payment. Below 1.00, it doesn’t.
DSCR Calculator
Run the numbers in your market
Rate source: Freddie Mac 30-yr average via FRED® — Federal Reserve Bank of St. Louis · effective Oct 29, 2026
Prefilled with starting assumptions — enter your own rent or nightly figures, taxes, insurance, and HOA for a more accurate picture.
Program parameters update from Lendmire’s centralized guideline source. Taxes and insurance are editable estimates.
As of Oct 29, 2026 · General Freddie Mac market benchmark, not a Lendmire loan offer. Rent, nightly rate, occupancy, taxes, and insurance are editable estimates. Short-term rental figures are estimates only and vary significantly by season, property type, management approach, and local short-term-rental rules — confirm local regulations before relying on them. Qualifying income for short-term rentals varies by program — some use appraisal market rent, others use documented STR history or projections — and is confirmed in underwriting. Not a Loan Estimate, approval, or commitment to lend. Program availability and eligibility are subject to lender guidelines, credit approval, property review, and underwriting.
DSCR loans are designed for non-owner-occupied investment properties. Because they are business-purpose investor loans, they are reviewed differently from a standard owner-occupied mortgage. The loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines. Credit, reserves and property type still matter. The Lendmire complete DSCR loans guide covers the full program picture. This article covers only the math you can do yourself.
One point trips up many new investors. The ratio measures rent against the loan payment and nothing else. A property can clear 1.00 and still lose money once you pay for a new roof, a vacant month or a property manager. Treat the ratio as a lending test, not a profit forecast.
Key Terms Defined
DSCR (debt service coverage ratio): the property’s qualifying monthly rent divided by its monthly PITIA.
PITIA: principal, interest, property taxes, insurance and association dues, which together make up the full monthly cost of holding the loan.
Rent used for lender review: the monthly rent figure the lender credits, which is often the lower of the signed lease and the appraiser’s market rent.
NOI (net operating income): rental income minus operating expenses, the numerator in commercial-style coverage tests.
LTV (loan-to-value): the loan amount as a percentage of the property’s value.
Reserves: liquid cash you hold after closing, usually measured in months of PITIA.
How Do You Run Your Own DSCR Loan Numbers Step by Step?
You need five inputs, a calculator and about ten minutes. Gather the inputs first, because a missing line item is a common reason a self-run number comes out too high.
| Input | Where to get it | Common mistake |
|---|---|---|
| Monthly rent | Signed lease and comparable monthly rentals | Using an asking rent or a nightly rate |
| Loan amount | Price × your planned LTV | Forgetting closing costs are separate |
| Principal and interest | A loan calculator using the terms you’re modeling | Using a payment from a different loan structure |
| Taxes | The county’s current bill, adjusted for reassessment | Using the seller’s bill after a sale resets it |
| Insurance and dues | A real quote and the HOA’s statement | Using last year’s premium or skipping dues |
Then work through the steps in order.
1. Pick the rent. Use the lower of the lease and a realistic market rent. A vacant property relies on market rent alone.
2. Build PITIA. Add the principal and interest to monthly taxes, insurance and any association dues. Leave out utilities, management, maintenance and vacancy.
3. Divide. Rent ÷ PITIA gives the ratio.
4. Stress it. Re-run the ratio with lower rent, a higher insurance quote and a smaller loan.
5. Back-solve. Divide rent by your target ratio to find the largest payment the rent supports.
Here is a modeled example, not a market figure. Assume rent equals 125% of the full monthly payment. Divide rent by payment and you get 1.25. Now back-solve for a 1.20 target. Rent divided by 1.20 means the payment can be about 83% of rent. At 1.00, the payment can be all of it.
Taxes deserve extra care. After a purchase, the county may reassess the property at the new price, so the seller’s old bill can understate your real figure. If your inputs use the old bill, your ratio looks better than the lender’s will.
Which Rent Figure Counts?
On most files, the lender credits the lower of the signed lease and the appraiser’s market rent. An above-market lease does not lift your ratio. A below-market lease pulls it down. If the lease is well under market, renewing it at market before the appraisal can raise the rent the lender counts.
The appraiser documents market rent on a rent schedule built from comparable rentals. For a single-family investment property, that is Form 1007, which shows the appraiser’s comparable-rent method. Two-to-four-unit properties use the equivalent Form 1025, which analyzes rent unit by unit.
Before the appraisal, estimate market rent yourself. Pull the monthly rents of similar properties nearby, matching bedroom count, condition and unit type. Then trim your estimate a bit. An appraiser’s comparables rarely land at the top of the range.
Two Formulas, One Property
Search results mix two different formulas, and the difference matters. Commercial coverage tests divide net operating income by debt service. Most one-to-four-unit DSCR programs divide gross rent by PITIA instead. Wikipedia’s summary of the debt service coverage ratio describes the NOI version and says commercial banks commonly look for roughly 1.15 to 1.35. That is a commercial benchmark, not a DSCR rental program figure. For rental programs across the wholesale network Lendmire places files with, 1.00 is where select programs start.
| Factor | Rent ÷ PITIA | NOI ÷ debt service |
|---|---|---|
| Typical use | 1–4 unit rental loans | Apartment and commercial loans |
| Numerator | Gross rent used for lender review | Income minus operating costs |
| Expenses counted | Taxes, insurance, dues only | Full operating expenses |
| Result on same deal | Usually higher | Usually lower |
Some lenders subtract expenses or a vacancy allowance first. Always ask which numerator a program uses, and label which method you ran so you can compare like with like.
What Does Your Result Mean?
Your ratio sorts the deal into one of three zones, and each zone has a different next move.
| Your ratio | What it means | Next move |
|---|---|---|
| Below 1.00 | Rent doesn’t cover PITIA | Fix the inputs, or ask about select-lender paths |
| At or just above 1.00 | Clears a floor, no cushion | Stress-test before you commit |
| Well above 1.00 | Room for rent or cost surprises | Compare leverage and pricing tiers |
Stronger ratios open better pricing and leverage. Coverage is only one of two tests, though. The strongest files clear both: enough equity and enough rental coverage.
Across the network, these are the typical guideposts, always subject to lender guidelines and each file’s underwriting:
- Leverage: most investment-property purchases land at 75%–80% LTV (20%–25% down). Select high-leverage programs reach 85% LTV on a purchase, generally with a 700+ score.
- Credit: a 620 floor exists in parts of the network, most programs want around 660, and 700+ unlocks the strongest tiers.
- Reserves: commonly about 6 months of PITIA, stepping up to about 9 months on loans above $1,500,000. Conservative rate-and-term files at modest leverage under $1,500,000 can see reserves waived.
- Loan size: standard programs go up to $3,000,000. Smaller balances route through select lenders. Above $2,500,000, the network generally holds to 30-year fixed structures.
A larger down payment lowers the monthly payment and can lift the ratio. It never erases a leverage cap, a credit floor, a reserve rule or a property restriction.
How Do You Stress-Test the Deal?
Stress-testing shows how fragile a ratio is. Start from a modeled base ratio of 1.25 and change one input at a time.
| Scenario | Modeled ratio |
|---|---|
| Base case | 1.25 |
| Rent 5% lower | about 1.19 |
| Rent 10% lower | about 1.13 |
| PITIA 5% higher | about 1.19 |
| PITIA 10% higher | about 1.14 |
| Rent 10% lower and PITIA 10% higher | about 1.02 |
A 1.25 deal survives most single shocks. A deal that starts at 1.10 does not, since a 10% rent cut alone drops it below 1.00. Insurance is the input that moves most often, because a real quote frequently comes back higher than the number modeled. Get an actual quote before you trust your ratio.
DSCR vs. conventional financing
There are two common ways to finance an investment property, and they qualify you differently — here’s how investors weigh them.
Why investors choose it
- Qualifies on the property’s rental income — no personal tax returns, W-2s, or pay stubs needed to document income.
- No personal debt-to-income ceiling to clear, so existing mortgages and obligations don’t cap your borrowing the same way.
- Can be closed in an LLC, keeping the property inside a business entity.
- Built for scaling — not held to the limit on number of financed properties that conventional financing applies.
- Underwriting centers on the deal: generally qualifies when the rent covers the payment, a 1.00x coverage ratio being a common baseline (confirmed in underwriting).
- Designed specifically for investment property, including long-term and, where the program allows, short-term rentals.
Where it’s strong
- Often the lowest ongoing financing cost for a buyer who fully qualifies on personal income — a fit for a first property or a cost-first purchase.
Trade-offs for investors
- Requires full personal income documentation and must fit within a debt-to-income limit — salary, existing debts, and other mortgages all count.
- Typically held in your personal name rather than a business entity.
- Caps how many financed properties you can carry, which can become a ceiling as a portfolio grows.
- Evaluates you as a borrower as much as the property, which usually means more paperwork.
How investors usually choose: a first or single property often optimizes for the lowest financing cost; portfolio builders often optimize for leverage, vesting in an LLC, and scaling past conventional caps. The right answer depends on your goals, the property, and current guidelines — both paths run through select lenders in Lendmire’s wholesale network, with eligibility and terms confirmed in underwriting.
Why Does the Lender’s Number Differ From Yours?
When your result and a lender’s result disagree, the gap usually comes from one of these:
- Rent haircut: the lender credited the lower of lease and market rent, not your asking rent.
- Reassessed taxes: the lender used a post-purchase tax estimate.
- Insurance estimate: the lender used a real quote, which may include flood coverage.
- Association dues: you left them out.
- Payment structure: you modeled a 30-year fixed payment and the program qualified on a different structure.
- Loan amount: the lender’s LTV cap reduced the loan, or closing costs changed the structure.
- Numerator: the program subtracted expenses or vacancy before dividing.
Lendmire’s piece How to Run Your Numbers Before Calling a Mortgage Lender covers the broader prep work that goes with this step.
What If the Ratio Comes Back Too Low?
Each fix below can be tested by re-running the math.
1. Check the inputs first. A missing dues line or a stale insurance figure may be hiding in your number, and an inflated rent may be inflating it.
2. Lower the loan. A larger down payment cuts the payment and lifts the ratio. Re-run it at lower LTV.
3. Raise the credited rent. If the lease sits below market, renewing at market before the appraisal can help.
4. Change the payment structure. Select lenders in the network offer interest-only periods and extended terms such as 40-year, which lower the payment used in the ratio. Some programs review the file on interest, taxes, insurance and dues during the interest-only period. Ask which payment the program uses. The structure also changes the long-term cost of the loan.
5. Ask about a sub-1.00 path. Coverage below 1.00 is available through select lenders in the network, with leverage and terms adjusted. No-ratio structures are available only through select lenders, generally for borrowers who already own a primary residence.
6. Move on. If none of these work, the property may not suit a DSCR loan at its price.
Where Does the General Rule Break?
Four situations change the math.
Short-term rentals. Nightly income does not run through the monthly-rent form. Fannie Mae’s appraiser guidance says the rent schedule documents monthly market rent, was not designed for short-term rentals, and that multiplying a nightly rate by 30 is not valid. Programs use other income evidence instead. Across the network, purchase leverage on short-term-rental collateral tops out at 75% LTV, and cash-out on that collateral tops out at 70%. Expect a 640+ score and about 12 months of hosting history. Short-term rental rules can vary by city, county, HOA, and property type, so investors should confirm local rules before relying on projected rental income. Final terms depend on the lender’s guidelines, the property type, and the borrower’s complete credit picture.
Cash-out refinances. On a standard rental, cash-out tops out around 75% LTV, and about 6 months of seasoning is the common expectation. That is a separate test from coverage. Each figure is subject to lender guidelines and a complete review of property type, leverage, and credit.
Multi-unit properties. Rent is analyzed unit by unit. Programs treat vacant units differently, so ask how each unit is counted.
Ineligible property types. Manufactured homes (single- and double-wide), log homes and barndominiums are not offered in the network’s DSCR programs, so no ratio rescues them. Properties under rent stabilization may also have a legal rent cap that governs the rent a lender credits.
Pre-Application Worksheet
Copy this into a spreadsheet and fill in every line before you contact a lender:
- Property type and unit count.
- Lease rent, estimated market rent, and the lower of the two.
- Planned purchase price and LTV.
- Principal and interest on the structure you’re modeling.
- Monthly taxes, adjusted for reassessment.
- Monthly insurance from a real quote.
- Association dues.
- PITIA total, then rent ÷ PITIA.
- Ratio under rent −10%, PITIA +10%, and both together.
- Credit score tier and months of reserves available.
Frequently Asked Questions
Can I really run these numbers myself?
Yes, and you should before you pay for an appraisal. The formula is simple division. The hard part is inputs, especially insurance, reassessed taxes and a realistic market rent.
Do I include HOA dues in the calculation?
Yes. Association dues are the “A” in PITIA, and leaving them out inflates your ratio. Flood insurance belongs in the insurance line as well when the property needs it.
Is a higher ratio always better?
A higher ratio generally opens better pricing and leverage, but it is only one test. Credit score, reserves, LTV and property eligibility are reviewed alongside it. A 1.40 ratio does not offset a missing reserve requirement.
Which rent do I use if my lease is above market?
Use the market rent. On most files the lender credits the lower of the lease and the appraiser’s figure, so an above-market lease does not raise the ratio.
How often should I re-run the numbers?
Re-run them whenever a major input changes: a new insurance quote, a different loan amount, a signed lease or an appraisal result. Re-run them again before you lock a structure.
Next Steps
If you are buying or refinancing a rental property and want to see how the numbers work, Lendmire can help you compare DSCR loan options based on the property income, credit profile, leverage and investor goals. Lendmire is a mortgage broker arranging DSCR investor loans through select lenders in its wholesale network across 41 markets, including Washington, D.C. Everything here is general guidance, not a commitment to lend, and each file is reviewed individually by the lender.
About Lendmire
Lendmire (NMLS# 2371349) is a mortgage brokerage focused on DSCR investor financing, helping arrange programs through wholesale and investor-lending channels in 41 markets, including Washington, D.C. DSCR loans are evaluated by the lender on property cash flow rather than personal income, subject to lender guidelines, supporting LLC closings and accommodating investors with four or more financed properties. Scotsman Guide Top Mortgage Workplace in both 2025 and 2026.
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Informational only. Not a Loan Estimate, approval, or commitment to lend. Program availability and eligibility are subject to lender guidelines, credit approval, property review, and underwriting.
References
1. Fannie Mae – Single-Family Comparable Rent Schedule (Form 1007)
2. Wikipedia – Debt service coverage ratio
3. Fannie Mae – Appraiser Update
This article is part of Lendmire’s DSCR loan program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: How to Refinance a Chicago Two-Flat Into a DSCR Loan · Can You Get a DSCR Loan on a Vacant Rental With No Lease? · Can You Refinance a Rental With a DSCR Loan Right After Buying It?
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
- Mortgage Loan Originator · NMLS# 1129696 · Verify on NMLS Consumer Access
- North Carolina Real Estate Broker · License# 343312 · Verify on NCREC
- North Carolina Insurance Producer · License# 19053198 · Property, Casualty, Life, Health · Verify on NAIC SBS
- Lendmire LLC · Firm NMLS# 2371349 · Verify firm licensure
Required disclosures. Lendmire (NMLS# 2371349) operates as a licensed mortgage broker, not a direct lender or depository. The discussion in this article is general in nature and should not be relied upon as financial, legal, or tax advice — every investment scenario is unique and should be reviewed by a qualified professional. Any loan inquiry is subject to lender underwriting, and this article is not a commitment to lend or a guarantee of approval. Mortgage rates, loan terms, and program guidelines vary by borrower, property, and state, and may change without notice. Equal Housing Opportunity. Verify licensure at NMLS Consumer Access.