What DSCR actually measures
DSCR answers one question: does this property earn enough to pay its own mortgage? A DSCR of 1.0 means it breaks even — net rent equals debt service.
Anything above 1.0 is cushion. Lenders want enough cushion that vacancy, maintenance surprises, or rate hikes don't blow up the deal.
NOI is not cash flow
NOI excludes the mortgage payment. Cash flow includes it.
NOI = gross rent − operating expenses.
Cash flow = NOI − annual debt service.
DSCR uses NOI in the numerator, debt service in the denominator. They're distinct numbers and the difference matters.
The thresholds that matter
Under 1.0: most lenders won't fund. Property isn't self-sustaining.
1.0–1.19: a few specialty lenders, premium pricing, often a higher down payment required.
1.20–1.39: mainstream DSCR territory.
1.40+: cleanest pricing, best rates, lowest down payment.
The gotchas
Lenders use their imputed expense formula, not yours. Even if your unit has $0 management cost (self-managed), most lenders bake in 5–10%.
STRs get treated as long-term-rental equivalents by some lenders — your $5k/month STR cash flow might be assessed as $2,500/month LTR rent.
Cash reserves: most DSCR lenders want to see 3–6 months of PITI in your bank at close.
Common DSCR mistakes
- Using your actual expenses instead of lender imputed expenses.
- Assuming STR gross will fully count — many lenders haircut it.
- Forgetting to factor in vacancy reserve.
- Calculating DSCR on cash flow (denominator should be debt service).
- Ignoring reserves requirement at close.