DSCR
How to Calculate DSCR: Step-by-Step With Real Numbers
Published by Pinnacle Funding Network | Updated March 2026
Key Takeaway
DSCR is calculated by dividing the property's monthly rental income by the total monthly PITIA payment (principal, interest, taxes, insurance, and association dues). A DSCR of 1.00x means the rent exactly covers the payment. Most lenders require 1.00x minimum, with best pricing at 1.25x and above.
The DSCR calculation is the single most important number in investment property financing. It determines whether you qualify, what rate you get, and how much you can borrow. Yet most investors either don't understand it or calculate it wrong.
This post walks through the formula, shows you real examples on different property types, and explains the adjustments that trip people up.
The Formula
DSCR = Monthly Gross Rental Income ÷ Monthly PITIA
That's it. One number divided by another. But each side of that equation has nuances that matter.
Monthly Gross Rental Income = the market rent as determined by the appraiser (for purchases) or the actual lease rent (for refinances with an existing tenant).
Monthly PITIA = Principal + Interest + Taxes + Insurance + Association dues (HOA/condo fees).
The result tells you how many times the rental income covers the debt obligation. A DSCR of 1.00x means the rent exactly equals the payment. A DSCR of 1.25x means the rent exceeds the payment by 25%.
Example 1: Single-Family Rental
Property: 3BR/2BA in suburban Atlanta
| Item | Amount |
|---|---|
| Purchase Price | $310,000 |
| Loan Amount (75% LTV) | $232,500 |
| Rate | 7.25% fixed, 30yr |
| Appraised Market Rent | $2,400/month |
| Monthly PITIA Breakdown | |
| Principal & Interest | $1,586 |
| Property Tax | $310 |
| Insurance | $140 |
| HOA | $0 |
| Total PITIA | $2,036 |
| DSCR | $2,400 ÷ $2,036 = 1.18x |
Qualifies? Yes. Minimum is 1.00x. Rate tier: mid-range (best pricing starts at 1.25x).
To push this DSCR above 1.25x, you could increase the down payment (which reduces the loan amount and therefore the P&I), find a property with slightly higher rent, or negotiate a lower purchase price.
Example 2: Duplex
Property: Duplex in Tampa, FL
| Item | Amount |
|---|---|
| Purchase Price | $425,000 |
| Loan Amount (80% LTV) | $340,000 |
| Rate | 7.50% fixed, 30yr |
| Unit A Rent | $1,800/month |
| Unit B Rent | $1,650/month |
| Total Monthly Rent | $3,450 |
| Monthly PITIA Breakdown | |
| Principal & Interest | $2,378 |
| Property Tax | $425 |
| Insurance | $210 |
| HOA | $0 |
| Total PITIA | $3,013 |
| DSCR | $3,450 ÷ $3,013 = 1.15x |
Qualifies? Yes.
Multi-unit properties often produce better DSCRs because the combined rent from multiple units creates more income per dollar of debt service.
Example 3: Condo with HOA
Property: 2BR condo in Dallas, TX
| Item | Amount |
|---|---|
| Purchase Price | $275,000 |
| Loan Amount (75% LTV) | $206,250 |
| Rate | 7.375% fixed, 30yr |
| Market Rent | $2,100/month |
| Monthly PITIA Breakdown | |
| Principal & Interest | $1,424 |
| Property Tax | $480 |
| Insurance | $110 |
| HOA | $350 |
| Total PITIA | $2,364 |
| DSCR | $2,100 ÷ $2,364 = 0.89x |
Qualifies? No, below 1.00x minimum.
This is a common scenario with condos. The HOA fee pushes the PITIA above what the rent can cover. The property might still be a decent investment for appreciation, but it won't qualify for a standard DSCR loan.
Options: increase the down payment to reduce P&I, look for a similar unit with lower HOA, or check if the lender offers sub-1.0 DSCR programs (some go to 0.75x with higher rates and larger down payments).
What Counts as "Rent" in the DSCR Calculation
This is where it gets nuanced. Different lenders treat rental income differently:
For purchases (no existing tenant): The appraiser provides a market rent analysis based on comparable rentals in the area. This is an objective third-party estimate, not your best-case projection.
For refinances with existing lease: Lenders typically use the lesser of the lease rent or the appraiser's market rent. If your tenant pays $2,800 but market rent is $2,500, the lender uses $2,500. This prevents inflated DSCR calculations based on above-market rents.
For short-term rentals: Some lenders use AirDNA projections (often discounted by 25%), actual STR income history (12-24 months), or they default to long-term market rent. The income method varies by lender and program.
What's NOT included: Security deposits, pet fees, laundry income, parking fees, and other ancillary income are generally not counted in the DSCR calculation. Only the base rent matters.
Market Rent vs Actual Lease: Which Number the Lender Uses
The single most common reason a DSCR comes back lower than the investor calculated is that the lender did not use the rent the investor used. The rule across the programs Pinnacle Funding Network works with is simple to state and easy to get wrong: underwriting generally takes the lower of the in-place lease rent and the appraiser's market rent. Market rent is not a number you supply. It comes from the appraiser on a rent schedule, usually Form 1007 for a single unit, ordered alongside the appraisal itself.
The reason for the rule is that a lease is a private agreement and an appraisal is an independent opinion. A seller can hand you a lease at an above-market number, and taking that at face value would inflate the ratio on a payment the property may not actually support once that tenant leaves. Taking the lower of the two keeps the qualifying rent tied to what the unit can re-let for.
| Situation | Rent used to qualify | What to watch |
|---|---|---|
| Purchase, no tenant in place | The appraiser's market rent | You have no lease to argue with, so the appraisal is the whole case. Weak rental comps produce a weak ratio. |
| Refinance, lease rent below market rent | The lease rent, the lower figure | An under-market tenant caps your qualifying income even though the property is worth more. This is the most common surprise. |
| Refinance, lease rent above market rent | Commonly the lower of the two, though several programs will use the in-place rent up to a ceiling of about 125 percent of market rent | Above that ceiling the extra rent is simply not counted, however real it is. |
| Month-to-month, or under three months left on the lease at closing | Several programs allow the market rent to be used even when it is the higher number | The trade is usually elsewhere: some programs apply a small reduction to maximum LTV, or want proof of recent rent collection, on a month-to-month file. |
| Vacant at the time of a refinance | The appraiser's market rent | Treated much like a purchase. The vacancy itself may carry additional conditions. |
| Short-term rental | Commonly the lower of documented trailing income and the long-term market rent, with projection-based methods available on some programs | Method varies more here than anywhere else. Confirm which one applies before you model the deal. |
What this does to a real file. Take the single-family example above at a $1,800 monthly payment. A seller hands you a lease at $2,200 and the appraiser's rent schedule comes back at $1,950. You modelled 1.22x on the lease. Underwriting qualifies on $1,950 and the file is 1.08x. Both numbers clear the 1.00x minimum, so the loan is still workable, but the cushion you thought you had is gone and the pricing tier moves against you, because the best pricing sits at 1.25x and above. Run the ratio on the lower of the two rents before you go under contract and you will never be surprised by this.
The practical move on a refinance is to ask what the unit would re-let for today rather than what it currently rents for. If the honest answer is meaningfully above your in-place rent and the lease is near its end, the timing of the application matters: the same property can qualify on a different number depending on how many months are left on the lease at closing.
Common Calculation Mistakes
Forgetting HOA/condo fees. The PITIA includes association dues. A $350/month HOA fee can turn a 1.20x DSCR into a 0.95x. Always include it.
Using above-market rent. You might plan to rent for $2,800, but if the appraiser's market rent comes in at $2,400, the lender uses $2,400. Be realistic about what the appraisal will show.
Excluding insurance. Some investors calculate P&I only and forget that taxes and insurance are part of the denominator. Your DSCR is based on the full PITIA, not just the mortgage payment.
Confusing net and gross rent. DSCR uses gross rent - before vacancy, management fees, maintenance, and other operating expenses. Those costs are real, and they affect your actual cash flow, but they're not part of the DSCR formula.
The Quick Mental Math
Before you run full numbers, use this shortcut to filter properties quickly:
Monthly rent × 0.80 = approximate maximum PITIA for a 1.25x DSCR.
If rent is $2,500, your PITIA needs to be at or below $2,000 to hit 1.25x. If rent is $3,200, your PITIA ceiling is $2,560.
This lets you quickly evaluate whether a property is worth deeper analysis. If the numbers are close, run the full calculation. If they're way off, move on.
What Your DSCR Means for Pricing
DSCR isn't just pass/fail. Higher DSCRs earn better rates:
| DSCR Range | Impact |
|---|---|
| 1.25x+ | Best rate tier |
| 1.10-1.24x | Standard pricing |
| 1.00-1.09x | Rate premium (+0.25-0.50%) |
| 0.75-0.99x | Significant premium (+0.50-1.00%), limited programs, higher down payment |
| Below 0.75x | Most programs decline |
The difference between a 1.10x and a 1.25x DSCR can mean 0.25% on your rate - which is $60-80/month on a typical loan. If you can push the DSCR above 1.25x by increasing your down payment from 20% to 25%, the rate savings might offset the additional capital outlay.
Run Your Numbers
Want to know your DSCR before you submit an application? Send us the property details - address, purchase price, estimated rent - and we'll calculate the DSCR and show you what terms look like. Takes about 24 hours, no application needed.
James Loffredo, Principal
Pinnacle Funding Network
214-885-4313
info@pinnaclefundingnetwork.com
pinnaclefundingnetwork.com
Pinnacle Funding Network is a correspondent lender and loan originator. PFN originates loans and funds them through its network of institutional capital partners, who make final funding decisions; PFN may sell or assign loans at or after closing. Rates, terms, and programs are subject to change. All loan applications are subject to credit review, property appraisal, and underwriting approval.