How DSCR is calculated
DSCR = Net Operating Income ÷ Annual Debt Service
Note: This calculator covers business DSCR — the version used for SBA 7(a), SBA 504, and conventional commercial loans. If you are evaluating a rental property for a DSCR mortgage loan, use the rental DSCR calculator on Cash Flow Numbers, which uses gross rental income in place of business NOI.
Net operating income (NOI) is your business revenue minus all operating expenses — rent, payroll, cost of goods, utilities, insurance, and other overhead. It does not include debt payments (principal and interest) or income taxes. NOI is essentially your earnings before interest and taxes (EBIT), adjusted for any non-cash expenses.
Annual debt service is the total of all principal and interest payments due in a year across all your business loans — existing loans plus any new financing you are applying for. Lenders typically include the proposed loan in the calculation.
A DSCR of 1.0 means your income exactly covers your debt payments with nothing left over. A DSCR above 1.0 means you have a cushion. Lenders require that cushion as protection against revenue volatility.
What lenders look for
| DSCR | Interpretation | Lender view |
|---|---|---|
| Below 1.0 | Cash flow deficit — income does not cover debt payments | Loan declined without strong collateral or a co-borrower |
| 1.0–1.15 | Marginally positive — very little cushion | High-risk; often declined or requires additional collateral |
| 1.15–1.25 | Minimum viable — some cushion | SBA loans require at least 1.15–1.25; some bank lenders require 1.20 |
| 1.25–1.35 | Standard — good coverage | Typically approvable at standard terms |
| Above 1.35 | Strong — healthy cushion | Preferred terms; may support larger loan amounts |
The SBA's Standard Operating Procedure sets a global cash flow standard that effectively requires a DSCR of at least 1.0 on a historical basis, and most SBA lenders set their own overlay at 1.15–1.25. Non-SBA bank lenders commonly require 1.25 or higher.
What is a debt service coverage ratio loan?
A debt service coverage ratio loan — also called a DSCR loan — is any business or commercial loan where the lender's primary underwriting criterion is whether the borrower's income covers the proposed debt payments by a required multiple. The term is widely used in two contexts:
- Business loans (SBA 7(a), SBA 504, conventional commercial) — lenders calculate DSCR using the business's net operating income divided by total annual debt service, including the new loan. Most require a minimum of 1.15–1.25×.
- Rental property DSCR loans — a non-QM mortgage product where lenders qualify investors based on rental income covering the proposed mortgage payment rather than the borrower's personal income. Minimum ratios typically range from 1.0 to 1.25× depending on the lender. This calculator covers the business version; for rental DSCR see Cash Flow Numbers.
In both cases the underlying math is the same: DSCR = income available to service debt ÷ required annual debt payments. A ratio above 1.0 means cash flow exceeds debt obligations; below 1.0 means the business or property cannot cover its payments from operating income alone.
Worked examples
Example 1 — approved at 1.5×: A restaurant generates $300,000 in annual NOI. It has an existing equipment loan with $80,000/year in debt service and is applying for an SBA 7(a) loan that would add $40,000/year in payments.
| Item | Amount |
|---|---|
| Annual NOI | $300,000 |
| Existing debt service | $80,000 |
| Proposed SBA payments | $40,000 |
| Total annual debt service | $120,000 |
| DSCR | $300,000 ÷ $120,000 = 2.50 |
A DSCR of 2.50 comfortably clears the 1.25× threshold. The lender sees $180,000 in annual cushion — even if revenue dropped 45%, the business could still service its debt.
Example 2 — borderline at 1.18×: A retail shop has $118,000 in annual NOI and $100,000 in total annual debt service.
| Item | Amount |
|---|---|
| Annual NOI | $118,000 |
| Annual debt service | $100,000 |
| DSCR | $118,000 ÷ $100,000 = 1.18 |
| Max debt service at 1.25× | $118,000 ÷ 1.25 = $94,400 |
| Annual shortfall vs 1.25× threshold | $94,400 − $100,000 = −$5,600 |
This business would likely be declined at 1.25× but might qualify at a lender whose overlay is 1.15×. To hit 1.25× on the same debt load, NOI would need to increase to $125,000 — a $7,000 improvement, which could come from a price increase, cost reduction, or paying down some existing debt before applying.
Assumptions and limitations
- NOI definition varies by lender. Some lenders use cash-based NOI; others use accrual. Some add back depreciation (moving closer to EBITDA); others don't. Ask your lender which version of NOI they use before relying on your own calculation.
- Owner compensation adjustments. For owner-operated businesses, lenders often add back unreasonably high or low owner salaries to normalize NOI. This calculator does not make that adjustment — enter the adjusted figure if your lender specifies one.
- Global cash flow. For businesses where the owner has personal guaranteed debt, SBA lenders may perform a "global cash flow" analysis combining personal and business cash flows. This calculator covers business cash flow only.
- Thresholds are guidelines, not guarantees. Individual lenders, loan programs, and borrower profiles can result in different cutoffs. A 1.30 DSCR does not guarantee approval; a 1.20 DSCR does not guarantee denial.
Frequently asked questions
- What DSCR does the SBA require for a 7(a) loan?
- The SBA's own rule (SOP 50 10) requires positive global cash flow but does not set a hard minimum number. In practice, most SBA-approved lenders apply an overlay of 1.15 to 1.25. The SBA 7(a) loan calculator on this site lets you model payments and check whether your current NOI would support the loan.
- Is DSCR calculated on annual or monthly figures?
- Either works as long as you're consistent — annual NOI divided by annual debt service gives the same result as monthly NOI divided by monthly debt service. This calculator uses annual figures because most business tax returns and lender packages are annual.
- What's included in "debt service"?
- All business loan payments — principal plus interest — on every outstanding loan, including capital leases, SBA loans, equipment financing, and lines of credit with a balance. Credit card minimums are sometimes included by lenders doing a detailed underwrite. Operating leases (rent) are typically excluded because they are already deducted from NOI as an operating expense — including them again would double-count.
- How can I improve my DSCR before applying?
- Four levers: (1) increase revenue or cut operating costs to grow NOI; (2) pay off or refinance high-payment existing loans to reduce debt service; (3) extend the term of the proposed loan (longer term = lower annual payment); (4) reduce the loan amount. Even a small improvement — paying off a $500/month equipment loan, for example — can push a borderline DSCR across the threshold.