What Is DSCR in Real Estate?
The debt service coverage ratio tells lenders — and you — whether a property's income is sufficient to cover its debt obligations. It's the metric that determines whether you get the loan.
What is DSCR in commercial real estate?
DSCR — debt service coverage ratio — measures how many times a property’s net operating income can cover its annual debt service (mortgage payments). A DSCR of 1.25x means the property generates 25% more income than needed to cover the loan payments. A DSCR of 1.00x means it barely breaks even. Below 1.00x means the property can’t cover its debt from operations alone.
Lenders use DSCR as their primary underwriting metric for commercial real estate loans. Most conventional commercial lenders require a minimum DSCR of 1.20x to 1.25x. Some conservative lenders or high-leverage deals require 1.30x or higher. If your deal doesn’t meet the DSCR threshold, you won’t get the loan — regardless of how attractive the cap rate or purchase price looks.
For investors, DSCR is a safety margin indicator. The higher the DSCR, the more cushion you have if income drops due to vacancy, rent reductions, or rising expenses. A DSCR of 1.50x means income would have to decline by 33% before you’d struggle to make debt payments.
How to calculate DSCR
DSCR = NOI ÷ Annual Debt Service
NOI is your annual net operating income — gross revenue minus operating expenses, before debt service.
Annual debt service is your total mortgage payment for the year — principal plus interest. If your monthly payment is $15,000, annual debt service is $180,000.
Example: $540,000 NOI ÷ $420,000 annual debt service = 1.29x DSCR. This means the property generates 29% more income than needed to service the debt — a comfortable margin for most lenders.
Example: DSCR on an industrial acquisition
Sample inputs
- Purchase price
- $5,000,000
- Loan amount (75% LTV)
- $3,750,000
- Interest rate
- 6.25%
- Amortization
- 25 years
- Monthly payment
- $24,738
- Annual debt service
- $296,851
- Gross revenue
- $525,000
- Operating expenses
- $157,500
- NOI
- $367,500
DSCR = $367,500 ÷ $296,851 = 1.24x. That clears the 1.20x floor most conventional lenders set, but sits just under the 1.25x many prefer — close enough to the line that it may cost you in rate or required equity. The property generates $70,649 in annual cash flow after debt service — your pre-tax return on equity.
If one of the three tenants vacated (reducing NOI by ~$120,000), DSCR would drop to approximately 0.83x — below breakeven. This highlights why lenders care about DSCR: it quantifies how much income cushion exists before the loan becomes distressed.
Why DSCR matters for investors
DSCR determines your maximum loan amount. If a lender requires 1.25x DSCR, they’ll size the loan so that annual debt service doesn’t exceed NOI ÷ 1.25. Higher NOI allows more debt; lower NOI limits your leverage.
It also measures your downside protection. A 1.50x DSCR means you can lose a third of your income before missing a payment. A 1.10x DSCR means a 10% income decline puts you in distress. For properties with lease rollover risk or concentration risk, targeting a higher DSCR is prudent.
DSCR also impacts your interest rate. Lenders price risk, and a deal with a thin 1.15x DSCR will typically carry a higher rate or require more equity than a deal with a comfortable 1.40x DSCR.
Common mistakes with DSCR
Using pro forma NOI instead of in-place
Lenders typically underwrite DSCR on actual trailing NOI, not your projected stabilized income. A deal that works on pro forma but fails on trailing won't get financed.
Forgetting to annualize debt service
DSCR uses annual numbers. Make sure you're comparing annual NOI to annual debt service (monthly payment × 12), not mixing monthly and annual figures.
Ignoring interest-only periods
During an interest-only period, your debt service is lower, which inflates DSCR. Once the loan converts to fully amortizing, DSCR drops. Lenders may underwrite DSCR on the fully amortizing payment regardless of the IO period.
Not stress-testing DSCR
Run DSCR with a tenant vacancy scenario. If losing your largest tenant drops DSCR below 1.00x, you have concentration risk that both you and your lender should understand.
Frequently asked questions
What does DSCR stand for?
DSCR stands for debt service coverage ratio. It measures how many times a property's net operating income can cover its annual debt service (mortgage payments). It's the primary metric lenders use to determine whether a commercial real estate loan is feasible.
What is a good DSCR for commercial real estate?
Most lenders require a minimum DSCR of 1.20x to 1.25x. A DSCR of 1.30x or higher is considered comfortable. DSCRs above 1.50x indicate strong debt coverage. The higher the DSCR, the more cushion you have against income declines.
What happens if DSCR drops below 1.0?
A DSCR below 1.0 means the property's income doesn't cover its debt payments — you'd need to cover the shortfall from other sources. This typically triggers a loan default or covenant violation. Lenders structure minimum DSCR requirements specifically to avoid this scenario.
How does DSCR affect how much I can borrow?
Lenders use DSCR to size loans. They calculate the maximum annual debt service the NOI can support at their required DSCR, then work backward to determine the loan amount. Higher NOI or a lower DSCR requirement means you can borrow more.
Is DSCR calculated monthly or annually?
DSCR is typically calculated on an annual basis — annual NOI divided by annual debt service. Some lenders may also look at trailing 3-month or 6-month DSCR for monitoring purposes, but the standard underwriting metric is annual.
Final thoughts
DSCR is the metric that sits between you and the loan. Understand it, and you understand how lenders evaluate your deal. Ignore it, and you’ll be surprised when financing falls through on a deal that looked great on paper.
DealWise AI calculates DSCR automatically from your deal’s NOI and financing terms — and updates it in real time as you adjust assumptions. No manual calculation needed.
Related guides
How to calculate DSCR
Step-by-step DSCR calculation with examples.
What is a good DSCR?
DSCR benchmarks by property type and lender.
What is NOI?
The income number that determines DSCR.
What is cap rate?
The other metric NOI drives, and how the two differ.
Amortization vs interest-only
How loan structure impacts DSCR.
Commercial real estate loan terms
Every financing term explained in plain language.
Calculators that run these numbers for you
DSCR calculator
Debt service coverage from NOI and annual debt service, and the max loan it supports.
Debt yield calculator
What lenders check because DSCR can be improved by structure alone.
Break-even occupancy calculator
Coverage expressed in points of occupancy, which is the unit vacancy arrives in.
Loan payment calculator
Calculate the debt service that drives DSCR.
Cap rate calculator
Cap rate and NOI from rent, operating expenses and purchase price.
DSCR is one ratio. The rent roll behind it is the real work.
DealWise AI derives NOI lease by lease from your actual rent roll, sizes debt against it, and re-runs DSCR every time you move an assumption. Free to start.