The Quick Read: On a standard DSCR loan, each rental is tested alone: that property’s qualifying monthly rent divided by that property’s own monthly principal, interest, taxes, insurance, and any HOA dues. Rent from your other rentals is not pooled in, and their payments are not charged against the new loan.
- The formula is rent ÷ PITIA, using one property’s numbers only.
- A strong rental does not rescue a weak one when the loans are separate.
- A duplex or fourplex is one rental: all unit rents over one building payment.
- Select programs in the network start at 1.00 coverage, and stronger ratios open better pricing and leverage.
- Clearing the ratio is a lender test. It is not the same as positive cash flow.
Most investors hold more than one rental, so the real question is whether the numbers stack up or stand alone. They stand alone. Here is how the math runs, where files go wrong, and what to do when one rental falls short. The complete DSCR loans guide covers the wider product.
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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.
The Formula, One Rental at a Time
The formula is monthly rent used for lender review divided by monthly PITIA for the subject property. PITIA means principal, interest, taxes, insurance, and association dues. Nothing from another property enters either side.
Think of it as a single-property test with two inputs and one output.
| Piece | What it is | Source of the number |
|---|---|---|
| Numerator | Qualifying monthly rent | Lease or appraisal rent schedule |
| Denominator | P&I, taxes, insurance, HOA | The new loan and the property’s own costs |
| Result | Coverage ratio | Feeds eligibility, leverage, pricing |
A ratio of 1.00 means rent equals the full monthly obligation. Above 1.00, rent exceeds it. Below 1.00, it does not. Across the wholesale network, 1.00 is where select programs start. It is a floor for those programs, not a universal standard. Stronger coverage generally opens better pricing and leverage.
The property’s own loan amount drives the principal and interest piece. Change the loan size and the ratio moves. That is why a larger down payment can lift coverage on a purchase. It lowers the payment. It does not erase leverage caps, credit floors, reserve rules, or property eligibility.
What Counts as the Rent?
Rent is whichever figure the program accepts for that property. For a leased rental, lenders typically look at the lease. For a vacant property or a purchase, the appraiser’s market-rent analysis carries the number. Many programs credit the lower of the two when both exist.
The appraisal side is documented on agency-created forms that DSCR lenders borrow. Fannie Mae’s forms list names Form 1007, the single-family comparable rent schedule, and Form 1025, the small residential income property report. Form 1007 is prepared by the appraiser as an attachment to the appraisal for a single-family investment property. Form 1025 covers 2-4 units. DSCR loans are not agency products. Only the forms are borrowed.
| Situation | Typical rent input |
|---|---|
| Leased single-family | Lease, tested against market rent |
| Vacant or purchase | Appraiser’s market-rent schedule |
| Duplex to fourplex | Combined unit rents on one analysis |
| Short-term rental | Hosting history or a market-data projection |
Short-term rentals run on their own parameters in the network. Purchase leverage tops out at 75% LTV, refinance sits around 70%, and cash-out is 70% on short-term-rental collateral. Expect a 640+ score, about 12 months of hosting history, and a 1.00 coverage floor on purchases. Refinances also use a 1.00 floor. 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. The exact numbers vary by lender and program and follow a full review of property, leverage, and credit.
What Counts as the Payment?
The payment is the full monthly obligation on that property. It includes principal and interest on the proposed loan, plus property taxes, hazard insurance, and any HOA dues. Flood insurance goes in where it applies.
The most common drafting error is using P&I alone. That overstates coverage, because taxes and insurance are real monthly costs the lender counts. A calculator that skips them gives a number the file will not repeat.
On interest-only structures, the denominator can drop the principal piece. Some lenders review the file on interest, taxes, insurance, and dues in that case. This is lender-specific, so confirm it against the actual program. Interest-only periods and extended terms such as 40-year are available through select lenders in the network, and the spine of most files is still the 30-year fixed.
Keep periods consistent. Monthly rent goes over monthly payment. Annual over annual works too. Mixing them produces a ratio off by a factor of twelve.
Three Rentals, Three Separate Tests
Here is the table the question really calls for. Picture an investor with three rentals, each financed on its own loan. The ratios below are modeled assumptions, not market data.
| Rental | Rent input | Own ratio | Result |
|---|---|---|---|
| Single-family, long-term lease | Lease vs. market rent | About 1.30x | Clears 1.00 |
| Fourplex, combined units | Form 1025 rent analysis | About 1.10x | Clears 1.00 |
| Short-term rental | Hosting history | About 0.92x | Below 1.00 |
There is no blended total in this table, and that is the point. The 1.30x rental does not lend its excess to the 0.92x rental. Each file is read by itself.
Two things follow. First, your existing loans are not pooled into the new test. The new rental’s ratio is its own rent over its own payment, not your portfolio’s rent over your portfolio’s debt. Second, the fourplex is one test. Four unit rents sit over one building payment. It is not four separate ratios.
Mixed portfolios are where the confusion starts. An investor sees a ratio of 1.30 on one door and assumes the average carries a weaker door. On separately financed loans it does not.
Why Some Sources Say “Aggregate”
Blanket and portfolio loans are different. When several properties sit under one loan, the lender may test combined rent against combined payment. Some pages describe that blended math as if it were the default. It is not. It applies when the properties are cross-collateralized under one note.
| Structure | How coverage is tested |
|---|---|
| Separate loan per rental | Each property’s rent over its own payment |
| Blanket or portfolio loan | Often combined rent over combined payment |
| Duplex to fourplex (one loan) | All unit rents over one building payment |
Before you rely on a blended number, confirm which structure you are in. The wholesale network handles separate-loan files as the common case.
When One Rental Falls Short
A below-1.00 result hits that rental only. The other rentals’ loans are untouched. The levers are all property-level.
- Lower the loan amount. A larger down payment cuts the payment and raises the ratio.
- Adjust leverage and terms. Coverage below 1.00 is available through select lenders in the network, with leverage and terms adjusted. 1.00 is where many select programs start. This is a separate path, not the same program with a lower floor.
- Revisit the rent evidence. If the appraisal’s market rent came in under your pro forma, the ratio dropped with it. Lease documentation can matter when the lease is higher and the program credits it.
- Look at the structure. An interest-only period can lift coverage on files where the program allows it.
Some files fail on the denominator, not the rent. Taxes and insurance quotes move the ratio about as much as the loan size does. Higher HOA dues do the same. A stale insurance estimate is a classic file derailer, because the number changes after the investor has already modeled the deal.
Where Files Go Wrong
Most failures are input errors, not formula errors.
- Using another property’s payment in the denominator.
- Pooling rent from two properties on separately financed loans.
- Leaving taxes, insurance, or HOA out of the payment.
- Mixing monthly and annual figures.
- Modeling on a lease rent when the appraisal’s market rent is lower.
- Treating a Form 1007 schedule as a DSCR-specific form. It is an agency appraisal form that DSCR files borrow.
Two formulas also share the name. Commercial and analyst usage divides net operating income by annual debt service. Wikipedia’s entry on the debt service coverage ratio describes that general definition. Residential DSCR loans typically use gross rent over PITIA, with no deduction for vacancy, management, or repairs. Confusing the two gives very different answers. Commercial lenders also tend to want higher coverage, which is a different market from these programs.
What the Ratio Does Not Tell You
DSCR compares rent to PITIA. That is all. Clearing 1.00 is not positive cash flow. Repairs, vacancy, management, utilities, and capital expenses sit outside the calculation. A rental can clear the lender’s test and still lose money.
Run your own cash flow separately, with vacancy and repairs built in. Treat the DSCR ratio as the lender’s gate and your own cash-flow math as the investment decision. Both tests matter, and the strongest files clear both: enough equity and enough rental coverage.
Program Guardrails That Sit Beside the Ratio
The ratio is one gate. Typical network ranges for the others, subject to lender guidelines:
- Purchase leverage: most files land at 75%-80% LTV on a purchase, with select high-leverage programs reaching 85% at roughly a 700+ score.
- Cash-out refinance: tops out around 75% LTV on an investment property, with about 6 months of seasoning the common expectation.
- Credit: a 620 floor exists in parts of the network, most programs want around 660, and 700+ unlocks the strongest tiers.
- Loan size: up to $3,000,000 on standard programs, with smaller balances routed through select lenders.
- Reserves: commonly around 6 months of PITIA, stepping up to about 9 months above $1,500,000. Conservative rate-term files at modest leverage under that size can see reserves waived.
- Not offered: manufactured homes, log homes, and barndominiums.
No-ratio structures exist only through select lenders, generally for borrowers who already own a primary residence. Programs change and every file is underwritten individually. This is not a commitment to lend.
Checklist Before You Run the Numbers
1. Pull the lease and, for a purchase, expect an appraisal rent schedule.
2. Get current tax, insurance, and HOA figures for this property only.
3. Build the full monthly payment, not P&I alone.
4. Divide rent by payment and keep periods consistent.
5. Repeat the worksheet separately for each rental. No blended row.
6. Run a second sheet with vacancy and repairs for your own cash flow.
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.
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. The brokerage arranges these loans through select lenders in a wholesale network covering 41 markets, including Washington, D.C. For related reading, see Lendmire’s piece How Much Rent a DSCR Loan Needs to Cover Its Own Payment.
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.
Key Terms Defined
DSCR: The ratio of a property’s rent used for lender review to its monthly payment.
PITIA: Principal, interest, taxes, insurance, and association dues on one property.
ITIA: Interest, taxes, insurance, and dues, used on some interest-only files.
Form 1007: The appraiser’s rent schedule for a one-unit investment property.
Form 1025: The small residential income property report, used for 2-4 units.
Blanket loan: One loan secured by several properties, where coverage may be blended.
Frequently Asked Questions
Does my other rental’s rent help this one qualify?
No, not on separate loans. The new rental is tested on its own rent over its own PITIA. Excess coverage on a different property does not carry over. Only a blanket or portfolio structure blends rents and payments, and that is a different loan.
Do my other mortgages count against the new rental’s ratio?
Not in the DSCR formula. Their payments are not added to the new denominator. Credit still matters, though, and a 620 floor exists in parts of the network, with most programs wanting around 660. Reserves can also be reviewed across your holdings.
Is a duplex one test or two?
One. The combined unit rents sit over the single building payment. A 2-4 unit property uses the rent analysis on Form 1025 rather than Form 1007.
Is a short-term rental calculated the same way?
The formula is the same. Short-term rental purchases top out at 75% LTV in the network, and lenders look harder at variable income. Final terms depend on the lender’s guidelines, the property type, and the borrower’s complete credit picture.
Is a DSCR of 1.25 the same as being profitable?
No. The ratio ignores vacancy, repairs, management, utilities, and capex. A property can clear the lender’s test and still run negative on your own cash-flow sheet.
For current guidelines and terms, see Lendmire’s DSCR loan programs page.
About Lendmire
Lendmire is a non-QM mortgage brokerage (NMLS# 2371349) arranging DSCR investor loans in 41 markets, including Washington, D.C., through wholesale and investor-lending channels. DSCR loans are evaluated by the lender on rental income rather than personal income, subject to lender guidelines — a fit for LLC-owned portfolios, self-employed investors, and operators scaling beyond conventional loan caps. Recognized as a Scotsman Guide Top Mortgage Workplace in 2025 and 2026.
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References
1. Fannie Mae, Selling and Servicing Guide Forms
2. Fannie Mae, Form 1007 Single-Family Comparable Rent Schedule
3. Wikipedia, Debt service coverage ratio
This article is part of Lendmire’s DSCR loan program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: How DSCR Short-Term Rental Loan Entity and Guaranty Requirements Work · Do DSCR Lenders Require Reserves on Every Airbnb You Own? · How DSCR History Requirements Work When Converting a Long-Term Rental to STR
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Disclosure information. Lendmire is a state-licensed mortgage brokerage under NMLS# 2371349. Lendmire is not a depository institution, direct lender, or financial advisor — all loans referenced are placed through wholesale lender partners and are subject to each lender's underwriting standards. This article is provided for general informational purposes and is not a commitment to lend, nor does it constitute financial, legal, or tax advice. Loan programs, terms, rates, and qualification standards change without notice and depend on borrower profile, property type, and the state in which the subject property is located. Equal Housing Opportunity provider. NMLS Consumer Access: nmlsconsumeraccess.org.