How to Calculate DSCR: Step-by-Step Guide with Real Examples
DSCR is the single number that determines whether you qualify for an investment property loan without showing tax returns. Here's exactly how to calculate it, what lenders actually look for, and how to improve your ratio if you're borderline.
The Formula
DSCR = Gross Monthly Rental Income / Total Monthly PITIAPITIA = Principal + Interest + Taxes + Insurance + HOA (if applicable)
That's it. One number divided by another. If the result is 1.0 or higher, the property's income covers the debt. If it's below 1.0, it doesn't — and you'll need to bring more cash to the table.
Step-by-Step Calculation
Step 1: Determine Gross Monthly Rental Income
For long-term rentals, lenders use one of:
- Current lease amount (if property is already rented)
- Appraiser's rent schedule (Form 1007) for the market area
- Comparable rental analysis from a property manager
For short-term rentals (Airbnb/VRBO), lenders use:
- 12-month booking history from the platform
- AirDNA or similar STR revenue projections
- Some lenders apply a 25% vacancy/expense haircut to STR income
Step 2: Calculate Total PITIA
Add up ALL of these monthly costs:
| Component | How to Find It |
|---|---|
| Principal + Interest | From your loan estimate or amortization calculator |
| Property Taxes | County assessor website / annual tax bill / 12 |
| Homeowner's Insurance | Insurance quote for the property |
| HOA Dues | From the HOA disclosure (if applicable) |
| Flood Insurance | Required if in a flood zone (FEMA maps) |
Step 3: Divide
DSCR = Step 1 / Step 2
Real Examples
Example 1: Single-Family Rental in Riverside, CA
| Item | Amount |
|---|---|
| Monthly rent (per lease) | $2,800 |
| Loan: $340,000 at 7.0%, 30-year | $2,262 (P&I) |
| Property taxes | $354/mo |
| Insurance | $125/mo |
| HOA | $0 |
| Total PITIA | $2,741 |
| DSCR | $2,800 / $2,741 = 1.02 |
Result: Qualifies at most lenders (1.0 minimum), but may get a rate adjustment for being below 1.25. Putting more down (lowering the loan amount) would improve the DSCR.
Example 2: Duplex in Phoenix, AZ
| Item | Amount |
|---|---|
| Unit A rent | $1,600 |
| Unit B rent | $1,450 |
| Total monthly rent | $3,050 |
| Loan: $420,000 at 6.875%, 30-year | $2,757 (P&I) |
| Property taxes | $290/mo |
| Insurance | $165/mo |
| HOA | $0 |
| Total PITIA | $3,212 |
| DSCR | $3,050 / $3,212 = 0.95 |
Result: Below 1.0 — doesn't qualify at standard terms. Options: increase down payment (lower loan amount), find a lender that allows 0.75 DSCR (higher rate/down payment), or negotiate higher rents.
Example 3: Airbnb Property in Scottsdale, AZ
| Item | Amount |
|---|---|
| 12-month STR gross income | $72,000 |
| Lender applies 25% vacancy haircut | -$18,000 |
| Adjusted annual income | $54,000 |
| Monthly income (for DSCR) | $4,500 |
| Loan: $500,000 at 7.25%, 30-year | $3,412 (P&I) |
| Property taxes | $420/mo |
| Insurance | $210/mo |
| HOA | $175/mo |
| Total PITIA | $4,217 |
| DSCR | $4,500 / $4,217 = 1.07 |
Result: Qualifies, but just barely. The STR haircut hurts. A 12-month booking history showing consistent occupancy could negotiate a smaller haircut with certain lenders.
What DSCR Lenders Actually Look For
| DSCR Range | What It Means | Typical Terms |
|---|---|---|
| 1.25+ | Strong cash flow | Best rates, lowest down payment (15-20%) |
| 1.10 - 1.24 | Good cash flow | Standard rates, 20-25% down |
| 1.00 - 1.09 | Break-even | Rate premium, 25% down typical |
| 0.75 - 0.99 | Negative cash flow | Available but expensive — 25-30% down, higher rates |
| Below 0.75 | Deep negative | Most lenders won't touch it |
How to Improve Your DSCR
If your DSCR is borderline, here are the levers:
Increase the numerator (income):
- Raise rents to market rate (most underused lever)
- Add a unit (ADU, garage conversion) for additional rental income
- Switch from long-term to short-term rental (higher gross, but lenders may haircut)
- Get a professional rent survey showing higher market rents
Decrease the denominator (PITIA):
- Increase down payment (lower loan amount = lower P&I)
- Buy down the rate (pay points to lower the interest rate)
- Shop insurance aggressively (can save $50-$100/mo)
- Challenge property tax assessment if inflated
- Choose a property without HOA
Need to pull equity from another property to fund your down payment? See HELOC vs cash-out refi.
DSCR vs. Conventional Investment Property Loans
| DSCR Loan | Conventional Investment | |
|---|---|---|
| Income verification | Property income only | Full personal tax returns, W-2s |
| DTI requirement | None (DSCR ratio only) | Max 45-50% |
| Max properties | Unlimited | 10 financed properties (Fannie Mae) |
| Down payment | 15-25% | 15-25% |
| Rates (Feb 2026) | 6.5% - 8.0% | 6.0% - 7.5% |
| Best for | Scaling a portfolio, self-employed investors | First 1-4 investment properties with strong W-2 income |
FAQ
Does DSCR include property management fees?
No. Standard DSCR calculations use PITIA only. However, some lenders may factor in a property management expense (typically 5-10% of gross rent) for their internal analysis, especially on short-term rentals.
Can I use projected rents for a property I'm purchasing?
Yes. For purchases, lenders use the appraiser's rent schedule (Form 1007) or comparable rental analysis to estimate market rent. You don't need an existing tenant.
What about vacancy? Does DSCR account for it?
Standard DSCR calculation does NOT deduct for vacancy on long-term rentals (the appraiser's market rent assumes full occupancy). For short-term rentals, many lenders apply a 20-25% haircut to account for vacancy and seasonality.
Is DSCR calculated monthly or annually?
Both give the same result. Monthly income / monthly PITIA = annual income / annual PITIA. Lenders typically work with monthly figures.
Can I use a DSCR loan on my primary residence?
No. DSCR loans are strictly for investment properties. The property must be tenant-occupied or available for rent.
Tyler Huntington | NMLS #181638 | West Capital Lending (NMLS #1566096)
Running the numbers on a deal? Text me at (949) 998-5403 — I'll calculate your DSCR and tell you exactly what you qualify for.
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