Disclaimer: DSCRFinder.com is not a mortgage lender, broker, or financial advisor. Examples use typical July 2026 market figures for illustration — always verify terms directly with licensed lenders before making decisions.
DSCR — the Debt Service Coverage Ratio — is the single number that decides whether a rental property qualifies for a DSCR loan and what rate you'll pay. The good news: the math takes about two minutes once you know what goes into it. The bad news: most investors who get it wrong don't fumble the formula — they fumble the inputs.
This guide walks through the formula, the five inputs that matter, and four fully worked examples. If you'd rather skip the arithmetic, our free DSCR calculator does it instantly, and you can download the Excel template at the bottom of this post.
The DSCR Formula
DSCR = Monthly Rental Income ÷ Monthly PITIA
PITIA is the full monthly cost of owning the property with the loan in place:
- Principal — the part of the payment that pays down the loan
- Interest — the cost of borrowing
- Taxes — property taxes, divided into a monthly figure
- Insurance — the annual premium, divided monthly
- Association dues — HOA fees, if any
A DSCR of exactly 1.00 means the rent covers the payment to the dollar. Above 1.00, the property generates surplus; below it, you're feeding the deal from your own pocket every month.
What the Result Means to a Lender
| DSCR | What It Means | Typical Lender Response | |---|---|---| | 1.25+ | Strong surplus cash flow | Best pricing tier at nearly every lender | | 1.00 – 1.24 | Property covers itself | Qualifies broadly, standard pricing | | 0.75 – 0.99 | Rent doesn't cover PITIA | Limited lenders, +0.50% or more on rate, bigger down payment | | Below 0.75 | Deep negative cash flow | Very few options — restructure the deal |
The 5 Inputs — and Where Investors Go Wrong
1. Monthly rent. Lenders don't take your number — they order a 1007 rent schedule (an appraiser's market-rent opinion) and, if the property is leased, compare it to the lease. Many use the lower of the two. Using an optimistic Zillow estimate here is the #1 source of deals that die in underwriting.
2. Principal & interest. Driven by loan amount, rate, and term. Use a realistic rate for your credit tier — check current DSCR rates — not the teaser rate from an ad.
3. Property taxes. Use the county's actual bill, and in reassessment states, adjust it up toward your purchase price. A seller's decade-old assessment can understate your real bill by hundreds per month.
4. Insurance. Get a real quote. Carriers can differ by $100–$250/month on the same property, and rule-of-thumb estimates run badly low in coastal Florida, Gulf Coast Texas, and hail country.
5. HOA dues. Counted in full. A $250/month HOA needs $250 more rent just to hold your DSCR flat — the structural reason condos qualify harder than houses.
Example 1: Standard Single-Family Rental
$350,000 purchase · 25% down · 7.75% rate · 30-year fixed · $2,800/mo market rent · $4,200/yr taxes · $1,560/yr insurance · no HOA
| Step | Value | |---|---| | Loan amount ($350,000 − 25% down) | $262,500 | | Monthly P&I | $1,881 | | Monthly taxes ($4,200 ÷ 12) | $350 | | Monthly insurance ($1,560 ÷ 12) | $130 | | Total PITIA | $2,361 | | DSCR = $2,800 ÷ $2,361 | 1.19 |
Verdict: qualifies comfortably at standard pricing. To reach the 1.25+ best-pricing tier, this investor could raise the down payment to 30% or negotiate roughly $140/mo more rent.
Example 2: Duplex That Hits the Best Tier
$420,000 duplex · 25% down · 7.50% rate · $3,550/mo combined rent ($1,775/unit) · $5,000/yr taxes · $2,100/yr insurance
| Step | Value | |---|---| | Loan amount | $315,000 | | Monthly P&I | $2,203 | | Taxes + insurance (monthly) | $417 + $175 | | Total PITIA | $2,794 | | DSCR = $3,550 ÷ $2,794 | 1.27 |
Verdict: best pricing tier. This is why small multifamily is a DSCR favorite — two rents against one PITIA. Note that lenders count appraiser-confirmed rent for both units, and a vacant unit is fine (they'll use market rent from the 1007).
Example 3: The Sub-1.0 Deal — and Two Ways to Rescue It
$550,000 house in an expensive metro · 20% down · 8.00% rate · $3,200/mo rent · $6,600/yr taxes · $1,800/yr insurance
| Step | Value | |---|---| | Loan amount | $440,000 | | Monthly P&I | $3,229 | | Taxes + insurance (monthly) | $550 + $150 | | Total PITIA | $3,929 | | DSCR = $3,200 ÷ $3,929 | 0.81 |
At 0.81, most lenders decline. Two structural fixes:
- Raise the down payment to 35%: loan drops to $357,500, P&I to $2,623, PITIA to $3,323 — DSCR climbs to 0.96. Better, but still short.
- Combine 35% down with an interest-only structure: on the same $357,500 loan, the interest-only payment at 8% is $2,383, bringing PITIA to about $3,083 — DSCR 1.04, and the deal qualifies with lenders that underwrite on the IO payment. (30% down with interest-only only reaches 0.98, so the larger down payment is doing real work here.)
The honest takeaway: some deals need $190,000+ of cash and an IO loan just to scrape past 1.0. That's the market telling you the price-to-rent ratio doesn't work — often the better fix is a different property. Our guide on improving your DSCR ratio covers all nine levers.
Example 4: Short-Term Rental
$380,000 vacation-market house · 25% down · 8.00% rate · projected $4,100/mo average STR income · $4,600/yr taxes · $2,400/yr insurance
| Step | Value | |---|---| | Loan amount | $285,000 | | Monthly P&I | $2,091 | | Taxes + insurance (monthly) | $383 + $200 | | Total PITIA | $2,675 | | DSCR = $4,100 ÷ $2,675 | 1.53 |
The catch is the income number. Lenders document STR income differently — some accept AirDNA projections (often with a haircut of 10–20%), some require 12 months of actual platform history, and some will only use the long-term market rent from the 1007, which might be $2,400 here and drop the DSCR to 0.90. Same property, three different answers — lender selection is the calculation for STRs. See our STR DSCR guide.
Common Calculation Mistakes
- Using gross Zillow rent instead of the 1007 market rent — the appraiser's number wins.
- Using the seller's old tax bill in a state that reassesses at sale.
- Guessing insurance instead of quoting it.
- Forgetting HOA dues entirely.
- Including utilities, property management, or maintenance — these are NOT in PITIA. DSCR is deliberately a lender's coverage metric, not a full cash-flow analysis. A 1.10 DSCR property can still be cash-flow negative after management and repairs, which is why investors should run both numbers.
Free Excel Template
Want to run scenarios offline? Download our free DSCR calculator template — enter price, down payment, rate, rent, taxes, insurance, and HOA, and it computes PITIA, your DSCR with a color-coded tier, and a bonus interest-only scenario.
Download the DSCR Calculator Excel Template
Or use the instant online calculator — same math, no download.
DSCR Calculation FAQ
Is DSCR calculated on monthly or annual figures? Either works — the ratio is identical as long as you're consistent. Residential DSCR lenders quote it monthly: rent ÷ PITIA.
Do lenders subtract vacancy or expenses from the rent? For 1–4 unit residential DSCR loans, most use gross rent with no vacancy or expense haircut. Commercial DSCR (5+ units) typically uses net operating income instead, which is a stricter calculation.
What rent number will the lender use if my lease is below market? Commonly the lower of lease rent or the 1007 market rent. If your tenant is under-market, consider renewing at market rate before applying.
Does my personal debt-to-income ratio matter? No — DSCR loans never look at your personal income or DTI. Your credit score matters for pricing, but the qualifying ratio is entirely the property's.
Can DSCR be calculated on an interest-only payment? With many lenders, yes — qualifying on the IO payment produces a higher DSCR, as Example 3 shows. Ask each lender which payment they underwrite; it varies.
What's the minimum DSCR to get a loan? Most lenders want 1.0+. Several accept 0.75+ with premium pricing and larger down payments — our lender comparison lists each lender's minimum.
Related: What Is a DSCR Loan? · How to Improve Your DSCR Ratio · DSCR Loan Requirements 2026 · DSCR Calculator
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