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
Purchase Price: $310,000
Loan Amount (75% LTV): $232,500
Rate: 7.25% fixed, 30yr
Appraised Market Rent: $2,400/month
Monthly PITIA:
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
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:
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
Purchase Price: $275,000
Loan Amount (75% LTV): $206,250
Rate: 7.375% fixed, 30yr
Market Rent: $2,100/month
Monthly PITIA:
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.
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
214-846-8602
james@pinnaclefundingnetwork.com
pinnaclefundingnetwork.com
Pinnacle Funding Network is a mortgage broker. PFN does not make loans or credit decisions. Loans are originated through PFN's lending partners. Rates, terms, and programs are subject to change. All loan applications are subject to credit review, property appraisal, and underwriting approval.