The Quick Read: Build the building’s net operating income from verified rents and real expenses, divide it by annual debt service for coverage, divide it by the loan amount for debt yield, and then compare the result with the rent-over-PITIA version your lender may use. Run all three before you make an offer. A building can pass one test and fail another.
- Net operating income (NOI) is rent plus other income, minus vacancy and running costs, before any loan payment.
- PITIA is principal, interest, taxes, insurance and association dues, the full monthly obligation on the loan.
- Debt service coverage (DSCR) can be rent over PITIA or NOI over debt service. Which one applies depends on the program.
- Debt yield is NOI divided by the loan amount. It ignores interest and amortization, so it does not move when the payment does.
- The smallest result sets the loan. Leverage, coverage and debt yield each cap the loan, and the tightest one wins.
Key Terms Defined
NOI (net operating income): The building’s yearly income after vacancy and operating expenses, but before the loan payment, depreciation, major capital projects and income tax.
Effective gross income: Scheduled rent minus a vacancy and credit-loss allowance, plus other income such as laundry or parking.
Debt service: The yearly total of principal and interest on the loan. Interest-only structures count interest alone.
PITIA: Principal, interest, taxes, insurance and association dues. Taxes and insurance appear here or in operating expenses, never both.
DSCR (debt service coverage ratio): A measure of whether income covers the loan obligation. A result of 1.00 means income equals the obligation.
Debt yield: NOI divided by the loan amount, expressed as a percentage. It shows what the building earns on every dollar the lender puts in.
Cap rate: NOI divided by property value. Appraisers use it to turn income into value on larger buildings.
LTV (loan-to-value): The loan amount as a percentage of the property’s value.
Rent roll: A unit-by-unit list of tenants, rents, lease dates and deposits.
Trailing 12: The actual income and expenses for the past twelve months, taken from statements and bank records.
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.
Why Five Units Changes the Math
Five units is the line where the formula, the appraisal and often the loan structure all change. A deal sized on the habits that work for a duplex through a fourplex can stall when it is re-run on a net-income basis. That is the most useful warning here.
| Factor | 1–4 units | 5+ units |
|---|---|---|
| Appraisal form | Residential forms | Commercial appraisal |
| Value approach | Mostly comparable sales | Leans on income |
| Typical DSCR math | Rent ÷ PITIA | Often NOI ÷ debt service |
| Expenses in the ratio | Not deducted from rent | Deducted before the ratio |
Appraisers use Fannie Mae’s Form 1025 for two-to-four unit properties, and that form stops at four units. AppraiserPoint’s multifamily guide says buildings of five or more units move to commercial forms and, in most states, a Certified General appraiser. Fannie Mae does not govern DSCR loans. The form simply shows where the small-building toolkit ends.
The appraisal matters because on a five-to-eight unit building, one NOI figure often drives value, coverage and debt yield at the same moment. Get that figure wrong and all three tests drift.
Step One: Build NOI the Way an Underwriter Does
Start with documents, not a budget. Gather the rent roll, the leases and the trailing 12 operating statements. VoucherMatch’s small multifamily underwriting playbook reports that lenders on five-to-eight unit deals look at twelve to twenty-four months of operating history, not just today’s rents. That matches the file requests we see across our wholesale network.
Then work down the page:
1. Add scheduled rent for every unit at full occupancy.
2. Subtract a vacancy and credit-loss allowance. Underwriters apply their own allowance, even when every unit is leased today.
3. Add other income you can document, such as laundry, parking or storage.
4. Subtract operating expenses: taxes, insurance, owner-paid utilities, repairs and maintenance, management, and a replacement reserve.
5. Stop. Do not subtract the loan payment, depreciation, capital projects or income tax.
What you get is NOI. Here is the catch for small-building owners: underwriters usually charge a management expense even when you manage the building yourself. They also tend to replace your budget with in-place expense history. Your own time is free to you, but it is not free to the lender.
Step Two: Check DSCR, Both Versions
The first question is which DSCR your program uses. Across the network we place files with, the standard test compares rent used for lender review to PITIA. Some lenders, more often on five-plus unit buildings, run a version based on NOI over annual debt service. Ask the lender which one applies before you trust any number.
Here is the decision rule:
- Rent over PITIA: divide the qualifying monthly rent by the full monthly PITIA. Taxes and insurance sit in the denominator.
- NOI over debt service: divide yearly NOI by yearly principal and interest. Taxes and insurance already came out in the NOI.
Keep the periods matched. Yearly NOI goes over yearly debt service, and monthly rent goes over monthly PITIA. Never put taxes and insurance in both places, because that counts them twice and understates your coverage.
Run both on every building. The NOI version is almost always lower, because it deducts operating costs the rent version never sees. A building near 1.25x on the rent method can land near or below 1.00x on the NOI method.
Something else to keep in mind: clearing 1.00 does not mean positive cash flow. DSCR compares rent to PITIA only. Repairs, vacancy, management, utilities and capital projects sit outside the calculation, and they are exactly what eats a small building’s margin.
Step Three: Check Debt Yield
Debt yield is NOI divided by the loan amount. Wall Street Prep describes it as a way lenders estimate how long it would take to recover their money if they had to take the property back. Divide by the loan, not by the property value. Some online pages get this wrong.
Because the formula has no interest or amortization input, a rate move leaves debt yield untouched. DSCR does move. That gives you a clean diagnostic. A weak DSCR with a healthy debt yield is a payment problem, and a different loan structure may fix it. A weak debt yield is an income-versus-loan problem, and only a smaller loan or more income fixes it.
You can also work backward from NOI. Divide NOI by the minimum debt yield a lender wants, and you get the largest loan that test allows. Divide NOI by the required coverage, then by the loan constant (yearly debt service per unit of loan), and you get the largest loan the coverage test allows.
How much a debt-yield test matters on a small loan varies by program. On many smaller files it works as a sanity check, while some lenders apply it as a hard sizing limit on larger balances. Ask before you assume.
One Building, Both Ratios
Run the numbers on a modeled six-unit building. These are assumptions in model units, not market data. Every line is for one year.
- Scheduled rent at full occupancy: 100 model units.
- Vacancy and credit loss at 7%: minus 7.
- Other income: plus 3.
- Effective gross income: 96.
- Operating expenses, including a management charge and replacement reserve: 42. Taxes and insurance make up 14 of that.
- NOI: 54.
- Modeled value at a 7% cap rate: about 771.
- Loan at 75% LTV on a purchase: about 578.
- Annual debt service (principal and interest): 50. Each figure is subject to lender guidelines and a complete review of property type, leverage, and credit.
Now the ratios:
- NOI over debt service: 54 ÷ 50 = 1.08.
- Rent over PITIA: PITIA is 50 plus the 14 of taxes and insurance, or 64. Scheduled rent of 100 ÷ 64 is about 1.56.
- Debt yield: 54 ÷ 578 is about 9.3%.
Same building, two coverage numbers. The rent-based figure looks comfortable and the NOI-based figure looks thin. Neither is wrong, because they answer different questions. This is why you check both before you write an offer.
Stress It Before the Lender Does
Re-run the same building with one change at a time. This shows which ratio reacts and which does not.
| Change | NOI | NOI ÷ debt service | Debt yield |
|---|---|---|---|
| Base case | 54 | 1.08 | 9.3% |
| Vacancy up 5 points | 49 | 0.98 | 8.5% |
| Debt service up 10% | 54 | 0.98 | 9.3% |
| Expenses up 5 | 49 | 0.98 | 8.5% |
| Loan 10% smaller | 54 | 1.20 | 10.4% |
Read the pattern. Anything that cuts NOI hurts both ratios. A higher payment hurts coverage only. A smaller loan helps both, which is why leverage is the lever that fixes the most problems.
This is also where a fairly priced building can turn out to be barely reviewable. VoucherMatch’s eight-unit example shows a building priced right at its income value that still produces coverage only slightly above 1.00 at typical leverage. Check the coverage before you offer, not after.
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.
Which Test Sets the Loan Size
Three limits apply at once: leverage, coverage and, where a lender uses it, debt yield. The smallest loan any of them allows is the loan you get. A strong coverage number does not buy you a bigger loan if the leverage cap or the debt yield stops you first.
Here is how our network’s parameters fit. Purchase leverage typically lands at 75%–80% LTV on investment property, subject to lender guidelines. Select high-leverage programs reach 85% LTV with roughly a 700+ score, and whether a five-to-eight unit building fits one is a property-type review. Most programs want a credit score around 660, a 620 floor exists in parts of the network, and 700+ opens the strongest tiers. Reserves commonly run about six months of PITIA, stepping up to about nine months on loans above $1,500,000. Standard programs cover loans up to $3,000,000.
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.
A larger down payment lowers the payment and can lift the coverage 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.
Where the General Rule Breaks
Gross rent passes, NOI fails. This is the classic trap, and the worked example shows it. If a program defines coverage on rent over PITIA, the rent number is the one that counts for the program. If you only ran that version but the lender sizes on NOI, you will be surprised.
Vacant units. Treatment varies by program. Some count a vacant unit as zero income. Others stabilize the building with a vacancy allowance. Do not assume a unit you plan to lease next month counts today.
Interest-only periods. Interest-only structures are available through select lenders in the network. On a rent-over-PITIA test, coverage then uses interest only, which lifts the ratio. Debt yield does not change, because it never looked at the payment.
Coverage below 1.00. Here is how the two paths differ. On select programs, 1.00 is the minimum coverage ratio. A separate path through select lenders in the network takes coverage below 1.00, with leverage and terms adjusted.
Mixed-use buildings. A storefront under apartments brings commercial rent and commercial lease terms into the income. Underwriters treat that income differently from residential rent, and program eligibility is reviewed property by property.
Value-add buildings. A building bought on projected rents is sized on in-place NOI. The loan can be capped well below what the future income implies. Underwriters give little credit for rents that have not been collected yet.
Why Your Number Will Not Match the Lender’s
Owners are usually working from a different NOI than the underwriter. The gaps tend to fall in the same places:
- Management: you charge nothing, and the lender charges a market fee.
- Vacancy: you assume full occupancy, and the lender applies an allowance.
- Reserves: you skip a replacement reserve, and the lender adds one.
- Utilities: you leave out owner-paid water, trash or common-area power, and the lender picks them up from the bills.
- Rents: you use a seller’s pro forma, and the lender uses leases and bank deposits.
Credit will not rescue a thin deal either. The debt is sized on the property, so weak NOI is not solved with a stronger score. A good score can improve leverage tiers, but it cannot raise the income.
What to Do When a Ratio Comes Up Short
Match the fix to the test that failed.
- Coverage is low but debt yield is healthy: the payment is the issue. Consider a lower loan amount, a larger down payment, or an interest-only period through a select lender, and compare structures.
- Debt yield is thin: the loan is too big for the income. Cut the loan, negotiate the price, or find real expense savings. A payment structure will not help.
- Both are low: NOI is the problem. Challenge the price, or look at the underwriter’s expense and vacancy assumptions line by line.
- Coverage lands under 1.00: coverage below 1.00 is available through select lenders in the network, with leverage and terms adjusted. Expect a different tradeoff on down payment and pricing, subject to lender guidelines and property review.
Pre-Lender Checklist
Assemble these before you ask for a scenario:
1. The current rent roll and signed leases.
2. Trailing 12 income and expense statements, plus bank statements showing the deposits.
3. The latest tax bill and a current insurance quote.
4. Utility bills for anything the owner pays.
5. The management agreement, or a written plan for how it will be handled.
6. A line-by-line NOI and the two coverage numbers above.
If you are building toward ten or more doors, the guide Can a Five-Unit Building Qualify for a DSCR Blanket Loan With 10+ Doors? covers that next step. For the basics behind every number here, start with the complete DSCR loans guide.
Frequently Asked Questions
Which matters more, debt yield or DSCR?
Neither always wins, because the tighter one sets the loan. DSCR is the test almost every DSCR program applies. Debt yield is a second check some lenders use, and it is a useful diagnostic for you either way because it ignores the payment.
Does five units automatically mean the NOI formula?
No. Five units moves the appraisal to commercial forms, but the DSCR definition is set by the program. Some use rent over PITIA, and some use NOI over debt service. Ask which one applies before you run the numbers.
Do taxes and insurance go in NOI or in debt service?
They go in one place only. In an NOI-based test they are operating expenses, so they reduce NOI. In a rent-over-PITIA test they sit in the payment. Counting them in both understates your coverage.
How are vacant units treated?
It varies by program. Some count a vacant unit as zero income, and others apply a vacancy allowance to the whole building. A unit you plan to lease usually earns no credit until a lease and deposits exist.
Can I use projected rents?
Lenders lean on verified, in-place leases and trailing history. Projected rents can matter for your own planning, but they are discounted or ignored in sizing. Underwrite your offer on what the building collects today.
Run Your Own Numbers
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 that arranges financing through select lenders in its wholesale network, across 41 markets including Washington, D.C. Programs are not a commitment to lend, and every file is underwritten individually.
Tax treatment varies; consult a qualified professional before relying on any deduction.
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
2. AppraiserPoint, Multi-Family Appraisal Guide
3. VoucherMatch, Small Multifamily Underwriting Playbook
4. Wall Street Prep, Debt Yield
This article is part of Lendmire’s DSCR loan program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: Can You Switch DSCR Lenders When the Terms Change Late? · How to Shop Airbnb Insurance Before a DSCR Refinance · How to Requalify a Condo on DSCR After a Dues or Insurance Jump
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
Compliance and disclosures. Lendmire (NMLS# 2371349) is a licensed mortgage broker and is not a direct lender, depository institution, financial advisor, or tax professional. Content in this article is general market analysis and educational information — not financial, legal, or tax advice for any specific situation. Lendmire does not guarantee loan approval; every transaction is subject to underwriting by the funding lender. Mortgage pricing and loan program guidelines are subject to change at any time without notice and vary by borrower characteristics, property type, and state regulations. Lendmire complies with Equal Housing Opportunity. Licensure verification: NMLS Consumer Access.