DSCR explained: how lenders calculate it (with examples)
Learn what DSCR is, how to calculate it from NOI and debt service, and what lenders typically want to see on rental deals.
DSCR (Debt Service Coverage Ratio) is one of the fastest ways a lender (and an investor) answers a simple question:
Does the property’s income comfortably cover the mortgage payment?
If you’re underwriting rentals (especially DSCR loans), you’ll see DSCR everywhere. Use the calculators:
What DSCR means
DSCR = NOI ÷ debt service
- NOI (Net Operating Income): income minus operating expenses (before debt).
- Debt service: your monthly (or annual) mortgage payment. Some lenders include taxes/insurance in the payment they use; others use principal+interest only.
Higher DSCR = more cushion.
DSCR example (monthly)
Assume:
- Rent: $2,400/mo
- Vacancy: 5% ($120/mo)
- Operating expenses (taxes, insurance, repairs, management, etc): $780/mo
Then:
- Effective income: $2,280/mo
- NOI: $2,280 − $780 = $1,500/mo
If the all-in monthly debt service is $1,250/mo:
- DSCR: $1,500 ÷ $1,250 = 1.20×
What DSCR do lenders want?
It depends on the program, but common targets are:
- ≥ 1.00×: break-even (no cushion)
- ≥ 1.15×: common minimum
- ≥ 1.20×: very common target
- ≥ 1.25×: stronger / more margin
If your deal “barely” hits the minimum, stress test it (rent down, expenses up, rate up).
The two most common DSCR mistakes
-
Using gross rent instead of NOI. DSCR is about net income after operating expenses.
-
Using the wrong debt service definition. Confirm whether the lender uses:
- principal + interest (P&I), or
- all-in payment (PITI), or
- interest-only debt service during an IO period
How to improve DSCR (without lying to yourself)
If DSCR is low, the honest levers are:
- Increase stabilized income (market rent, additional unit, other income)
- Reduce operating expenses (verify taxes/insurance, self-manage, but still include realistic reserves)
- Reduce debt service (bigger down payment, lower rate, longer amortization, interest-only period)
If you “fix DSCR” by deleting vacancy/repairs/capex, you’re just hiding risk.
FAQ
Is DSCR the same as cash flow?
No. DSCR is a ratio (NOI relative to debt service). Cash flow is the dollar amount left after debt service.
Does DSCR include principal paydown?
No. DSCR is about payment coverage. Principal paydown builds equity, but it doesn’t increase coverage.
Where should DSCR live in a workflow?
DSCR is a screening metric and an underwriting check. Use it alongside cap rate and cash-on-cash, and then validate with a full underwriting run: Property Underwriting.