How DSCR is calculated
DSCR = Net Operating Income ÷ Annual Debt Service. NOI is gross rents minus operating expenses (taxes, insurance, management, maintenance, vacancy) before mortgage payments. Annual debt service is your total principal + interest payments for the year.
Example: a rental property generates $30,000 in NOI and your annual mortgage payments are $24,000. DSCR = $30,000 ÷ $24,000 = 1.25. A DSCR above 1.0 means the property generates more income than it costs to service the debt. Below 1.0 means the rent doesn't cover the mortgage — negative cash flow territory.
Why lenders care, and what they require
Most conventional lenders require a DSCR of at least 1.20 to 1.25 on investment properties before they'll extend a loan. Some lenders will go to 1.15; fewer will lend below 1.0 (interest-only loans sometimes permit this in strong appreciation markets).
DSCR loans — sometimes called investor cash-flow loans — underwrite on the property's DSCR rather than the borrower's personal income. They've become popular with investors who have multiple properties or irregular W-2 income. The trade-off is typically a higher interest rate than an agency loan.
Improving your DSCR
You can improve DSCR by increasing rents, reducing operating expenses, or reducing the loan amount (larger down payment). Refinancing to a lower rate improves it on the debt-service side.
Watch for expense underestimation: lenders often use market-rate vacancy and management assumptions rather than actual numbers, which can push your DSCR below their threshold even when your property's actual cash flow looks fine.
Frequently asked questions
What DSCR do lenders require for a rental?
Most conventional investment-property lenders require 1.20–1.25. DSCR loan programs often require 1.0–1.25 depending on the loan-to-value and reserve requirements.
What is a DSCR loan?
A DSCR loan qualifies you based on the property's rental income relative to its debt service, rather than your personal W-2 or tax-return income. It's popular with investors who have multiple rentals or report low taxable income due to depreciation.
How do I calculate DSCR before buying?
Estimate NOI (expected rent × occupancy rate, minus all operating costs). Divide by the annual payment on the proposed mortgage. If the result is below 1.20, either negotiate a lower price, put more down, or reconsider.
Sources
Educational information and estimates only. Not tax advice. Tax rules change and vary by situation; consult a qualified tax professional before acting.