The Quick Read: A private lender sizes a DSCR loan by running two tests, a value test and a rent test, and then lending the smaller of the two results, subject to credit, reserves, and property review.
- Value test: the leverage cap (LTV) is applied to the lower of price or appraised value. On an investment-property purchase, most files land at 75%-80% LTV.
- Rent test: the rent used for lender review must cover the full payment (principal, interest, taxes, insurance, and association dues) at the program’s coverage floor.
- Binding limit: whichever test gives the smaller loan wins. On thin-rent properties it is usually the rent test.
- Not cash flow: clearing the ratio does not mean the property makes money after repairs, vacancy, and management.
This article walks through the sizing from start to finish. Brokers see it daily across many lenders’ guidelines. It also covers where the general rule breaks and what to do when the numbers come up short.
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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.
What Does “Sizing” Mean, and How Is It Different From Qualifying?
Qualifying means the file passes. Sizing means the lender sets the loan amount. A property can qualify and still be sized well below what the investor wanted.
A DSCR loan is a non-QM investor loan. It qualifies primarily on property-level rental income covering the payment, subject to lender guidelines. The lender does not build the file around the borrower’s personal income. It builds the file around the property.
“Private lender” here means a non-bank investor lender. A broker places the loan with it through a wholesale channel. These lenders set their own overlays, which is why two lenders can size the same rental differently. This is what the wholesale network sees every week.
For the general program picture, the complete DSCR loans guide covers the basics.
What Inputs Does the Lender Collect?
Every sizing run starts with six inputs. Miss one and the number moves later, usually down.
| Input | Where it comes from | Why it matters |
|---|---|---|
| Rent used for lender review | Lease or appraisal rent schedule | Sets the rent test |
| Taxes | Tax records for the property | Part of the payment |
| Insurance | Binder or quote | Part of the payment |
| Association dues | HOA or condo documents | Part of the payment |
| Loan structure | Term and amortization choice | Changes the tested payment |
| Value | Price or appraisal | Sets the value test |
Credit score sits above all of these. It sets the leverage tier and the pricing tier. Most programs in the network want about 660. A 620 floor exists in parts of the network. A score of 700 or better opens the strongest leverage tiers.
Step 1: Which Rent Does the Lender Use?
The lender generally credits the lower of the in-place lease and the appraiser’s market rent. A lease above market buys no extra loan. A lease below market can hold the ratio down even when the appraiser says the unit could rent for more.
A vacant but rent-ready unit is credited at the appraiser’s market rent. A rent track record is not required. The appraiser supplies the figure.
That figure comes from a rent schedule attached to the appraisal. The form is the 1007 for one-unit properties and the 1025 for two to four units. The appraisal does two jobs. It sets value, which drives the leverage test. It also sets market rent, which drives the rent test.
On a two-to-four-unit building, all unit rents are combined. The total is compared with the single building payment.
For buildings with five or more units and mixed-use properties, the analysis moves toward commercial-style net operating income. That is a different calculation from the one here. In commercial finance, DSCR means net operating income divided by debt service. On a one-to-four-unit rental, the lender uses gross rent divided by the full payment. The ratio ignores vacancy, repairs, management, and capital costs.
Step 2: How Is the Full Payment Built?
The payment is principal, interest, taxes, insurance, and association dues. The lender calls it PITIA. Lenders test it as one monthly obligation.
Taxes and insurance quietly move the answer. Two rentals with the same rent and the same loan size can size differently because one carries heavier carrying costs. Budget for both, and expect the insurance quote to be reviewed.
Loan structure also changes the tested payment. The spine of most programs is the 30-year fixed. Select lenders in the network also offer extended terms, such as 40-year, and interest-only periods. ARM structures exist for investors who want them.
On an interest-only structure, many lenders test coverage on the interest-only payment. The payment steps up when amortization starts. A file that clears coverage during the interest-only period can look different once the loan amortizes. Ask which payment the lender tests before building the plan around it. Lendmire’s piece How a DSCR Lender Sizes Interest-Only on a Mature Rental Pool goes deeper on that structure.
Step 3: How Does Rent Turn Into a Maximum Loan?
The rent test works backward from rent. The steps run in order:
1. Take the rent used for lender review.
2. Divide it by the coverage floor the program requires. The result is the largest monthly payment the rent can support.
3. Subtract taxes, insurance, and association dues. What remains is the room left for principal and interest.
4. Convert that room into a loan amount using the term and structure. A longer amortization supports a larger loan. An interest-only period supports a larger loan still, while it lasts.
That final figure is the rent-based ceiling. Many select programs set their coverage floor at 1.00. A separate select-lender path takes coverage below 1.00, with leverage and terms adjusted. A stronger ratio generally opens better pricing and sometimes more leverage.
A no-ratio path also exists. It is available only through select lenders, generally for borrowers who already own a primary residence. It is not the default.
Step 4: How Does the Value Cap Work?
The value-based ceiling is simpler. The lender applies the program’s leverage cap to the lower of the purchase price and the appraised value.
On an investment-property purchase, most files land at 75%-80% LTV, which means 20%-25% down. Select high-leverage programs reach 85% LTV with roughly a 700+ score. On a cash-out refinance of an investment property, leverage tops out around 75% across most of the network. About six months of seasoning is the common expectation.
Short-term rentals run lower. On short-term-rental collateral, purchase leverage goes to 75% and refinance sits around 70%. Cash-out on short-term-rental collateral is capped at 70%. Those files also expect a 640+ score and about 12 months of hosting history. The coverage floor is 1.00 on purchases and refinances.
Loan sizes run up to $3,000,000 on standard programs (smaller balances available through select lenders). Above $2,500,000 the network generally holds to 30-year fixed structures.
Step 5: Which Ceiling Wins?
The lender takes the smaller of the two ceilings. Then it layers on the rest of the file: credit, reserves, entity documents, title, insurance, and property eligibility.
Reserves vary by lender, leverage, loan size, and transaction type. About six months of PITIA is common. Conservative rate-term files at modest leverage under $1,500,000 can see reserves waived. Loans above that size typically step up to about nine months. Treat any single number as a typical range, not a promise.
Here is how a run looks, in ratios only. Take an investor who asks for 80% LTV on a purchase. At that loan size, the tested coverage comes in below the program floor. The value ceiling would allow the loan. The rent ceiling does not. The rent test binds, and the lender sizes down until coverage reaches the floor. The exact numbers vary by lender and program and follow a full review of property, leverage, and credit.
Flip the case. A rental in a high-rent area runs comfortably above the floor at 75% LTV. Now the value cap binds. More rent does not buy more loan. Leverage caps do not move. Final terms depend on the lender’s guidelines, the property type, and the borrower’s complete credit picture.
An investor with a strong score and strong coverage still does not get past the cap. A larger down payment lowers the payment and can lift the ratio. It does not erase leverage caps, credit floors, reserve rules, or property eligibility. The strongest files clear both tests: enough equity and enough rental coverage.
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.
What Happens When the Test Fails?
The investor has a handful of levers. Each one moves the number a different way.
| Lever | What changes | Effect on loan size |
|---|---|---|
| Larger down payment | Smaller loan, lower payment | Coverage rises |
| Longer amortization | Lower tested payment | Rent ceiling rises |
| Interest-only period | Lower tested payment | Rent ceiling rises while it lasts |
| Appraisal reconsideration | Better rent comps | Rent used for program review may rise |
| Sub-1.00 select-lender path | Coverage floor drops | Leverage and terms adjust |
| Different lender | Different overlays | Sizing can shift |
The appraisal reconsideration is a routine move, not an emergency one. A packet with specific in-neighborhood rental comps can move the rent opinion. A generic argument does not. An investor’s pro forma never replaces the appraiser’s number.
Raising the rent on paper just before closing does not help either. Documented market-level rent does.
Prepayment penalty structure also changes the outcome. A penalty usually trades more favorable pricing for a lock-in period. Step-down structures are common. No-penalty options exist but cost more. Some states restrict prepayment penalties, so the structure should match the investor’s planned hold.
Where Does the General Rule Break?
Four edge cases show up often enough to name.
Short-term rentals. The 1007 was not built for nightly stays. Fannie Mae’s Appraiser Update explains that the form calls for an indicated monthly market rent. It also calls it incorrect to multiply a nightly rate by 30. An appraisal-industry firm, Class Valuation, makes the same point. It says the form can’t support short-term-rental income and can produce an artificially low coverage ratio. Short-term-rental files therefore lean on hosting history or a market report, not the long-term rent schedule. 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.
Multi-property requests. On a standard single-property loan, each rental is tested alone. A strong rental does not rescue a weak one. Cross-pooling happens only in portfolio or blanket structures.
Vacant, expired, or undocumented leases. The result falls back to market rent from the appraisal, supported by comps.
Ineligible property types. Manufactured homes (single- and double-wide), log homes, and barndominiums are not offered in the network’s DSCR programs. No sizing exercise changes that.
Also keep this in mind on high-end rentals. Large loans change reserves and structure.
How Does a Private Lender Differ From a Big Bank?
Big banks and other depository institutions usually size from the borrower’s personal income and debt. A private DSCR lender sizes from the property. That shifts what the file needs.
| Factor | Private DSCR lender | Big bank |
|---|---|---|
| Qualifying basis | Property rent vs. payment | Personal income vs. debts |
| Main ceilings | Rent test and value test | Income test and value test |
| Lender discretion | Program overlays vary | Fixed bank policy |
| Documents reviewed | Appraisal, entity, credit, reserves | Pay stubs, tax returns, credit |
Neither sizing is easier. They test different things. A broker with access to many lenders can shop overlays. One lender may allow interest-only on a file another will not. One may take a sub-1.00 file where another stops.
What Mistakes Shrink the Loan?
- Running the numbers on last year’s tax or insurance bill.
- Counting a lease above market as if the lender will credit it.
- Assuming the interest-only payment is the tested payment for every lender.
- Treating a passing ratio as proof of positive cash flow.
- Forgetting association dues on condos and townhomes.
- Ordering a single-family rent opinion for a short-term-rental plan.
- Skipping entity documents until the end. Closing in an LLC is common and, subject to lender program eligibility, workable. The documents just need to be in order.
Key Terms Defined
PITIA: principal, interest, taxes, insurance, and association dues, tested together as one monthly obligation.
DSCR (coverage ratio): the rent used for eligibility review divided by PITIA. A ratio of 1.00 means rent equals the full payment.
LTV: the loan amount divided by the lower of price or appraised value.
Rent-based ceiling: the largest loan the rent used for the lender’s review can support at the program’s coverage floor.
Value-based ceiling: the largest loan the leverage cap allows against price or value.
Binding limit: whichever ceiling is smaller. It sets the loan amount.
Form 1007 and Form 1025: the appraisal rent schedules used for one-unit and two-to-four-unit rentals.
Frequently Asked Questions
Does the lender look at my personal income?
Not as the main test. DSCR files qualify primarily on property-level rental income covering the payment, subject to lender guidelines. Credit, reserves, entity documents, the appraisal, title, and insurance are still reviewed.
Which rent does the lender use?
Generally the lower of the in-place lease and the appraiser’s market rent. A vacant, rent-ready unit is credited at market rent. Short-term rentals follow a separate path built on hosting history or a market report.
Why is my approved amount lower than my calculator result?
Usually one of three reasons: the appraisal rent came in below the lease, taxes or insurance were higher than assumed, or the leverage cap binds ahead of the rent test. An illustrative calculator estimate is only a starting point, not an offer.
Does a larger down payment fix a weak ratio?
It helps. A smaller loan means a lower payment, and coverage rises. It does not override credit floors, reserve rules, leverage caps, or property eligibility.
Does clearing the ratio mean the rental makes money?
No. The ratio compares rent to PITIA only. Repairs, vacancy, management, utilities, and capital costs sit outside it. Tax treatment varies; consult a qualified professional.
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 that arranges financing through select lenders in its wholesale network, covering 41 markets, including Washington, D.C. All terms are subject to lender guidelines, credit approval, and property review, and nothing here is a commitment to lend. Call 828-256-2183 or request a quote through the mortgage quote page.
A rental that sizes cleanly is usually one where the lease, the appraisal rent, and the carrying costs were all documented before the lender asked.
About Lendmire
As a non-QM mortgage broker (NMLS# 2371349), Lendmire facilitates DSCR investor loans across 41 markets, including Washington, D.C. DSCR eligibility is generally reviewed around property-level rental income instead of personal income documentation, subject to lender guidelines, serving LLC-structured portfolios and self-employed borrowers who don’t fit conventional boxes. A two-time Scotsman Guide Top Mortgage Workplace (2025, 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 – Appraiser Update
2. Class Valuation – Appraisal Form 1007 and Short-Term Rentals
This article is part of Lendmire’s DSCR loan program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: Can a W-2 Employee Get a DSCR Loan on a Rental? · Can You Get a Higher LTV on a DSCR Rental Loan? · Can You Get a DSCR Loan Under 75K on a Small Rental?
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.