The Quick Read: Lenders divide the property’s monthly rent by its full monthly payment: principal, interest, taxes, insurance and any association dues. The rent they use is usually the lower of your signed lease or the appraiser’s market rent. A result of 1.00 means rent equals the payment, and select programs often start there.
- The loan is reviewed on the property’s income, so your personal pay stubs are not the center of the file.
- The rent figure and the payment figure each move the answer, so check both before you apply.
- Repairs, vacancy, management and utilities are not in the formula, so clearing 1.00 does not mean the deal cash flows.
- Leverage, credit score and reserves still matter, and a strong ratio does not erase them.
Key Terms Defined
Here are the terms you will see below, defined once so the rest reads cleanly.
- DSCR (debt service coverage ratio): the property’s monthly rent divided by its full monthly loan obligation.
- PITIA: principal, interest, property taxes, hazard insurance and any HOA or association dues, added together for one month.
- LTV (loan-to-value): the loan amount as a percentage of the property’s value or price.
- Form 1007: an appraisal form that documents the estimated monthly market rent for a one-unit rental or condo.
- Form 1025: the appraisal form for small income properties of two to four units, with unit-by-unit rent.
- Rent roll: a list of every unit, its tenant and its rent, used on multi-unit properties.
- Interest-only period: a stretch of the loan term when the payment covers interest and no principal.
- Reserves: liquid savings, counted in months of PITIA, that you hold after closing.
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 15, 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 15, 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.
How Lenders Calculate DSCR Step by Step
The calculation has four steps: choose the rent, build the payment, divide, and compare the result to the program minimum. Each step has a document behind it, and each is where files tend to wobble.
Step 1: Pick the rent. The appraiser reports market rent on a rent schedule. For an occupied property, the lender looks at the signed lease too. For a vacant property, market rent alone drives the number.
Step 2: Build the payment. The lender adds principal and interest, property tax, insurance and dues. Each piece comes from a specific place.
| Component | Where it comes from | Monthly basis |
|---|---|---|
| Principal and interest | Loan amount and term | Amortized payment |
| Property taxes | Tax bill or estimate | Annual total ÷ 12 |
| Hazard insurance | Insurance quote | Annual premium ÷ 12 |
| HOA dues | HOA statement | As billed monthly |
Step 3: Divide. Rent divided by PITIA gives the ratio. Above 1.00 means the rent covers the payment on paper. Below 1.00 means it does not.
Step 4: Compare. Most programs in the wholesale network Lendmire works with set a minimum. Select programs start at 1.00, and stronger ratios open better pricing and leverage. This is the mechanical heart of how lenders calculate DSCR, and everything after it is a variation.
Notice that nothing here asks about your salary. 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 file qualifies primarily on property-level rental income covering the payment, subject to lender guidelines.
For the full picture of how these loans fit together, see the complete DSCR loans guide.
Which Rent Number Does the Lender Use?
For an occupied rental, lenders generally use the lower of the signed lease or the appraiser’s market rent. A lease above market does not raise the number. A lease below market pulls it down.
That rule surprises many investors. You may have a tenant paying well, and the file still runs on the appraiser’s opinion. Form 1007 is the tool for a one-unit rental or condo, and Fannie Mae’s appraiser guidance describes it as documenting estimated monthly market rent. Those forms are appraisal tools. They do not set DSCR loan rules, which belong to each lender’s program.
For two to four units, the appraiser uses Form 1025 and reports market rent unit by unit. The lender adds the rents together and tests them against the single loan payment. A rent roll and leases back up the unit-level numbers.
A vacant property is simpler. There is no lease to compare, so the appraiser’s market rent is the numerator.
A Worked Example With Modeled Numbers
Here is a modeled example, built on index points instead of dollars. Treat monthly market rent as 100 points. These are assumptions for illustration, not market data.
| Line item | Points |
|---|---|
| Principal and interest | 55 |
| Property taxes | 15 |
| Insurance | 8 |
| HOA dues | 2 |
| PITIA total | 80 |
Rent of 100 over a payment of 80 gives a coverage ratio of 1.25.
Now run the conflict case. Say the signed lease equals 110 points, but the appraiser’s market rent is 100. The lender uses the lower figure. The file runs at 1.25, not the 1.375 you would get from the lease.
Now test a cost shock. If insurance climbs from 8 points to 12, the payment moves to 84. The same 100 points of rent now covers it at about 1.19.
Finally, picture a tighter deal. Rent of 100 against a payment of 105 gives about 0.95. That file sits below 1.00 and needs a different path, covered below.
What Changes the Math
The basic formula holds for 1–4 unit rentals, but four situations alter an input. The table shows the numerator, the denominator and the point to watch.
| Situation | Numerator | Denominator | Watch for |
|---|---|---|---|
| Interest-only | Market or lease rent | Interest-only payment | Payment steps up later |
| Multi-unit (2–4) | Combined unit rents | Single loan PITIA | Unit-level rent support |
| Short-term rental | Lender-chosen income method | Full PITIA | Revenue differs from underwritten rent |
| Large multifamily or commercial | Net operating income | Annual debt service | Different formula entirely |
Interest-only. Extended terms and interest-only periods are available through select lenders in the network. Some lenders test the ratio on the interest-only payment during that period. Others test at the fully amortizing payment. The formula is the same, but the denominator is not, so ask which one applies. The payment also rises when the interest-only period ends.
Net operating income. Commercial-style DSCR divides net operating income by annual debt service. Net operating income subtracts operating costs first. Residential DSCR on one to four units generally does not. Mixing the two methods is a common source of confusion when investors compare quotes.
Short-Term Rentals: Your Revenue Is Not the Number
On a short-term rental, the lender picks an income method, and your actual booking revenue may not be it. Fannie Mae’s appraiser update says Form 1007 was not designed for single-family properties used as short-term rentals. It also says an appraiser may not multiply a nightly rate by 30 to estimate monthly rent. A copy hosted by the Nevada Real Estate Division says the form cannot estimate a nightly fee.
Who decides the income, then? McKissock, an appraiser-education provider, explains that the lender ultimately decides, not the appraiser. So methods differ. A lender may use market rent, trailing income from platform statements, or a market-data projection.
In the network, short-term rental leverage runs lower than long-term rentals. Purchases go up to 75% LTV. Refinances run around 70%. Cash-out on short-term rental collateral tops out at 70%, while a standard long-term rental cash-out tops out at 75%. Expect a 640+ credit score and about 12 months of hosting history. The coverage floor is 1.00 on short-term rental purchases, and it is 1.00 on short-term rental refinances. Terms vary by lender guidelines, property type, leverage, credit profile, and full file review.
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.
Purchase Versus Refinance: Which Inputs Are Firm?
On a purchase, several inputs are estimates until the file is underwritten. On a refinance, more of them are documented. The table shows the usual split.
| Input | On a purchase | On a refinance |
|---|---|---|
| Rent | Market rent from appraisal | Lease plus appraisal |
| Taxes | Estimate or tax record | Current tax bill |
| Insurance | Quote | Existing policy or new quote |
| Loan payment | Based on new loan | Based on new loan |
Cash-out refinances top out around 75% LTV across most of the network, with about 6 months of seasoning as the common expectation. Seasoning is the waiting period between buying the property and refinancing it. Anyone planning a refinance should read Lendmire’s what lenders will give a home equity loan on rental property before counting on that timeline. Exact terms depend on the lender’s guidelines, property type, leverage, and a full review of the borrower’s file.
What Lenders Do With the Ratio
The ratio is a gate and a dial. It decides whether the file fits a program, and it nudges pricing and leverage. Across the wholesale network, 1.00 is where many select programs start. Stronger ratios generally open better terms.
Other pieces still have to line up. Purchase files typically land at 75%–80% LTV, meaning 20%–25% down. Select high-leverage programs reach 85% LTV on a purchase, with 15% down and roughly a 700+ score. Credit tiers run from a 620 floor in parts of the network, to around 660 for most programs, to 700+ for the strongest leverage tiers. Loan sizes run up to $3,000,000 on standard programs, and above $2,500,000 the network generally holds to 30-year fixed structures.
Reserves vary by lender, leverage, loan size and transaction type. About 6 months of PITIA is common. Conservative rate-and-term files at modest leverage under $1,500,000 can see reserves waived, and larger loans typically step up to about 9 months. All of this is subject to lender guidelines.
A bigger down payment lowers the payment and can lift the ratio. It never erases leverage caps, credit floors, reserve rules or property eligibility. The strongest files clear both tests: enough equity and enough rental coverage.
Some properties are simply not offered. Manufactured homes, whether single- or double-wide, log homes and barndominiums are not offered in the network’s DSCR programs.
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.
Below 1.00 and No-Ratio Files
Coverage below 1.00 is a separate path, not a lower setting on the same program. Many select programs start at 1.00. A separate path through select lenders in the network takes coverage below 1.00, with leverage and terms adjusted.
No-ratio structures exist too. They are available only through select lenders, generally for borrowers who already own a primary residence. Lendmire’s piece Why Lenders Usually Make You Own a Home First: Rental Property Basics explains that link. A no-ratio file still gets a property review, so the property remains part of the story.
If Your Ratio Comes Up Short
When the number falls short, you have a handful of levers. Each one moves either the numerator or the denominator.
1. Increase the down payment. Lower leverage lowers the payment, which lifts the ratio.
2. Shorten the gap between lease and market rent. If the lease sits below market, a renewal at market rent can help on a later refinance.
3. Reprice the insurance. Insurance is the cost line that most often moves between quote and closing, so get a fresh quote.
4. Ask about payment structure. Interest-only periods and extended terms through select lenders lower the payment tested.
5. Look at a different property. Sometimes a modestly priced duplex covers its payment with more room than a pricier single-family home.
Does Clearing 1.00 Mean Positive Cash Flow?
No. DSCR compares rent to PITIA only. Repairs, vacancy, management, utilities and capital expenses sit outside the calculation. A property at 1.10 can still lose money after a bad turnover.
So stress-test your own deal. If a deal clears 1.20 on paper, model what happens at 1.10 before you commit. Tax treatment can depend on how the funds are used and how the property is held; investors should keep clear records and speak with a qualified tax professional before relying on any deduction.
Quick Self-Check Before You Apply
- Gather the lease or rent roll, the insurance quote, tax figures and any HOA statement.
- Estimate PITIA, including every component in the table above.
- Compare lease rent with a realistic market rent, and use the lower one.
- Check your credit tier and your reserves in months of PITIA.
- Confirm the property type is eligible.
- For a short-term rental, line up platform statements and confirm local rules.
Frequently Asked Questions
Why do two lenders give different numbers on the same property?
They may choose different rent figures, count the payment differently, or treat interest-only periods differently. Some test at the amortizing payment, and some at the interest-only payment. Always ask which rent and which payment a lender uses.
Do lenders use my actual rent or the appraisal?
For an occupied property, the lender generally uses the lower of the signed lease or the appraiser’s market rent. A lease above market does not raise the ratio. Vacant properties run on market rent alone.
Are taxes and insurance included?
Yes. Taxes, hazard insurance and any association dues are part of PITIA. Leaving them out overstates the ratio, so include all of them when you estimate.
Is this the same as the commercial NOI version?
No. Commercial DSCR divides net operating income by annual debt service and subtracts operating costs first. Residential DSCR on one to four units generally compares gross rent to PITIA.
How is short-term rental income treated?
The lender decides the method, which may be market rent, trailing platform income, or a market-data projection. Nightly rate times 30 is not an acceptable shortcut.
Your Next Step
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 broker arranging DSCR financing through select lenders in its wholesale network, across 41 markets including Washington, D.C. Qualification is subject to lender guidelines, and nothing here is a commitment to lend. Each file is underwritten individually.
About Lendmire
Lendmire (NMLS# 2371349), a non-QM mortgage broker serving investors in 41 markets including Washington, D.C., helps structure DSCR scenarios commonly evaluated around a property’s rental income rather than personal income paperwork, subject to lender guidelines. A Scotsman Guide Top Mortgage Workplace in 2025 and 2026, Lendmire places loans through wholesale investor lenders and is not a direct lender.
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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 Appraiser Update
2. Nevada Real Estate Division copy of Fannie Mae short-term rental update
3. McKissock: Form 1007 and short-term rental appraisals
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 Get a DSCR Loan With Only Three Months of Rental History · How to Recycle Equity Into the Next Rental With DSCR Cash-Outs · How to Prepare a Rental Property for a DSCR Appraisal
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
- Mortgage Loan Originator · NMLS# 1129696 · Verify on NMLS Consumer Access
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- Lendmire LLC · Firm NMLS# 2371349 · Verify firm licensure
Legal disclosures. Lendmire (NMLS# 2371349) is a state-licensed mortgage brokerage that arranges financing through wholesale lender relationships. Lendmire is not a direct lender, depository institution, or registered financial advisor. The discussion above is general informational content about real estate financing — it is not financial, legal, or tax advice, and readers should consult licensed professionals for guidance on their individual circumstances. Loan inquiries are subject to lender underwriting; this article does not represent a commitment to lend. Loan terms, rates, and qualification standards vary by borrower, property, and state, and are subject to change at any time. Equal Housing Opportunity. NMLS Consumer Access: nmlsconsumeraccess.org.