Commercial · Question answered
What Is DSCR — and Why Can It Kill a Commercial Real Estate Deal?
A commercial property can look profitable and still fail lender underwriting. Here's how DSCR is calculated, why it caps your loan amount, and how to model it honestly.
Short answer
The direct answer.
DSCR — Debt Service Coverage Ratio — is net operating income divided by annual debt service. A property with $150,000 NOI and $120,000 of annual loan payments has a 1.25 DSCR, meaning it generates $1.25 for every $1.00 of debt payment. Most commercial lenders require roughly 1.20 to 1.30, and when the ratio falls short they shrink the loan, demand more cash, or decline the deal.
Why it matters
Price and cap rate describe the property. DSCR describes whether a lender will actually finance it. Many buyers assume they'll get a fixed percentage of purchase price, but commercial lenders size loans off both loan-to-value and debt coverage — and the lower of the two wins.
When interest rates rise, payments rise and DSCR falls unless NOI rises with them. The same asking price, rent roll, and cap rate can support a materially smaller loan today than it did a few years ago. Underwrite with current loan terms, not old assumptions.
How to Model DSCR Before You Offer
Start with a verified NOI — income after normal operating expenses, but before mortgage payments, income taxes, depreciation, and capital improvements. The formula is only as reliable as the NOI you feed it, and marketed NOI often assumes full occupancy, projected rent bumps, the seller's old tax bill, and no real repair budget.
Then work the ratio backward. If a property produces $100,000 of NOI and the lender requires a 1.25 DSCR, maximum annual debt service is $80,000 ($100,000 ÷ 1.25). Price a loan at today's rate and amortization to see what principal that payment supports. If the proposed loan requires $85,000 of debt service, the DSCR is 1.18 and the gap has to be closed with more cash, a lower price, or better terms.
Finally, stress the model: reassessed property taxes at your purchase price, a real insurance quote, market-rent renewals instead of above-market in-place rents, and a vacancy factor. A deal that only clears DSCR under the seller's best-case assumptions may not survive underwriting — or ownership.
How DSCR Changes the Deal
| Scenario | NOI | Annual Debt Service | DSCR | Lender Read |
|---|---|---|---|---|
| Healthy cushion | $150,000 | $120,000 | 1.25 | Clears most conventional requirements |
| Break-even | $100,000 | $100,000 | 1.00 | No room for vacancy, repairs, or tax increases — typically declined |
| Short of requirement | $100,000 | $85,000 | 1.18 | Below a 1.25 minimum; loan gets resized down |
| Resized to fit 1.25 | $100,000 | $80,000 | 1.25 | Smaller loan — buyer covers the difference in cash |
| Advertised NOI | $150,000 | $100,000 | 1.50 | Looks comfortably financeable on the offering memorandum |
| Corrected NOI | $120,000 | $100,000 | 1.20 | Same property, verified expenses — may now miss the threshold |
San Antonio / Hill Country example
Why a Strong Value-Add Deal Can Still Have Weak DSCR
A value-add property may have excellent potential once rents are raised, vacancies are filled, and operations are cleaned up. But the lender is generally financing the property as it performs today, not as your business plan projects it. Future improvements usually don't get full credit until the work is done and the higher income is proven.
That creates a financing gap that has to be solved with more cash, seller financing, renovation financing, an interest reserve, or a smaller acquisition loan. A good business plan does not automatically produce an easy loan — and DSCR is where that reality shows up first.
Common mistakes
- Treating a 1.00 DSCR as acceptable — it leaves zero room for vacancy, delinquency, repairs, or rising taxes and insurance.
- Assuming the lender will fund a fixed percentage of purchase price instead of the lower of LTV-based and DSCR-based loan sizing.
- Running DSCR on the offering memorandum's NOI rather than verified income and corrected expenses.
- Underwriting with interest rates from a prior cycle instead of a current lender quote.
- Expecting the lender to credit projected post-renovation income on a value-add or vacant property.
- Confusing DSCR with investment quality — a financeable deal can still produce a weak cash-on-cash return.
- Waiting until after contract to ask a lender what minimum DSCR, reserves, and liquidity they require.
When to ask for help
- You want a written read on whether a specific San Antonio or Hill Country commercial property supports the loan you're planning on, using realistic NOI.
- Your DSCR is close to the line and you need help deciding between a lower price, a larger down payment, longer amortization, or a different lender.
- You want introductions to commercial lenders who will quote DSCR, reserves, and recourse terms before you go under contract.
FAQs
Frequently asked questions.
What DSCR do commercial lenders require?
It varies by property type, lender, and borrower strength, but a common range is roughly 1.20 to 1.30 or higher. Riskier assets, short lease terms, or heavy tenant concentration can push the requirement up. Always ask the specific lender for their minimum before you make an offer.
How do I improve DSCR on a deal?
There are only a few levers: increase NOI by raising income or cutting legitimate operating expenses, or reduce annual debt service by borrowing less, getting a better rate, or extending amortization. You can also negotiate a lower purchase price — framed as what the deal supports at current NOI and financing terms.
Will the lender use my projected NOI or the current NOI?
Most lenders underwrite the property as it performs today, sometimes with modest, well-supported adjustments. Projected rent increases and post-renovation income typically don't receive full credit until the income is proven, which is why value-add deals often need extra equity or renovation financing.
Does a good DSCR mean it's a good investment?
No. DSCR only answers whether the property can support the debt. You still need to evaluate total cash required, cash flow after debt service, capital expenditures, tenant rollover, vacancy risk, and exit strategy. A deal can be financeable without being attractive.
What should I ask a lender before making an offer?
Ask what minimum DSCR is required, whether current or projected NOI will be used, how vacancy is treated, whether taxes and insurance will be adjusted post-sale, how short leases or tenant concentration are handled, whether renovation costs can be financed, and how much liquidity must remain after closing.