DSCR stands for Debt Service Coverage Ratio. It's a metric lenders use to determine whether a rental property generates enough income to cover its mortgage payments — and it's one of the most important numbers in investment property financing. Understanding DSCR helps you know whether a deal will qualify for a loan and how much cushion you're working with.
The DSCR Formula
DSCR is calculated by dividing a property's Net Operating Income (NOI) by its annual debt service (total mortgage payments).
DSCR = NOI / Annual Debt Service
For example: if a property generates $30,000 in annual NOI and the mortgage payments total $24,000 per year:
$30,000 / $24,000 = 1.25 DSCR
A DSCR of 1.25 means the property earns 25% more income than it needs to cover its debt.
What DSCR Lenders Look For
Most investment property lenders require a DSCR of at least 1.25. Some allow 1.20, and a few will go down to 1.0 — but below 1.25, your options narrow and rates typically increase.
| DSCR | What it means |
|---|---|
| 1.25+ | Meets most lender requirements |
| 1.0–1.24 | Borderline — some lenders may still qualify you |
| Below 1.0 | Property can't cover its own debt; most lenders won't approve |
A DSCR below 1.0 means the NOI is less than the mortgage payment. The property operates at a deficit, and a lender has no cushion if something goes wrong.
How NOI Is Calculated for DSCR
For DSCR purposes, lenders typically calculate NOI as:
NOI = Gross Rental Income - Vacancy - Operating Expenses
Operating expenses include property taxes, insurance, property management, maintenance, and utilities paid by the owner. They do not include mortgage payments — that's the debt service side of the equation.
Lenders often use their own assumptions for vacancy and expense ratios rather than taking your numbers at face value, so your actual underwriting DSCR may differ slightly from what you calculate yourself.
DSCR Loans vs. Conventional Loans
Traditional investment property loans are underwritten based on the borrower's personal income and debt-to-income ratio. DSCR loans flip this model: the loan is underwritten based on the property's income, not yours.
This makes DSCR loans popular with:
- Self-employed investors whose income is hard to document
- Investors who already own many properties and have maxed out conventional loan limits
- Investors who want to scale without their personal income being a bottleneck
DSCR loans typically have slightly higher rates than conventional loans, but the flexibility often outweighs the cost.
Improving Your DSCR
If a deal doesn't meet the DSCR threshold, there are a few levers:
Increase income: Higher rents, reduced vacancy, or adding a unit (ADU, garage conversion) all improve NOI.
Reduce operating expenses: Lower management costs or reduced taxes (via an appeal) improve the numerator.
Reduce the loan amount: A larger down payment means lower monthly debt service, which improves DSCR. This is often the fastest path to qualifying.
Negotiate loan terms: A lower interest rate or longer amortization period reduces monthly payments and improves DSCR.
DSCR vs. Cap Rate
Both metrics use NOI, but they serve different purposes:
- Cap rate measures a property's return relative to its value, ignoring financing.
- DSCR measures whether the property's income is sufficient to cover a specific loan.
Cap rate tells you about the deal itself. DSCR tells you whether it qualifies for the financing you're planning to use.
Calculate DSCR Online
Use the DSCR Calculator to enter annual NOI and annual debt service and get your ratio instantly. You'll see whether the property meets the 1.25 threshold and how much surplus or deficit income you're working with.