DSCR Calculator (Debt Service Coverage Ratio)

What DSCR actually tells you

Debt Service Coverage Ratio is the question every commercial banker is really asking: can this business pay its loans from the cash it generates? A DSCR of 1.0 means cash flow exactly covers debt payments — no margin for error. A DSCR of 1.5 means the business generates 50% more cash than it needs to service its debt. Bankers want a cushion, and the size of the cushion they want depends on how risky they think your industry is.

Almost everyone running this calculator is doing it for one of three reasons: applying for a new loan, refinancing, or worrying about a covenant on existing debt. The number on its own doesn't help much — what helps is knowing where it sits relative to your lender's threshold, and what you can do this quarter to move it.

The formula

DSCR = EBITDA ÷ (Annual Loan Payments + Annual Lease Payments)

Where EBITDA is earnings before interest, taxes, depreciation, and amortization, and the denominator is the total annual debt service — principal and interest on all term debt, plus operating lease payments where the lender includes them.

A worked example

A small construction company has:

Annual EBITDA of $480,000
Equipment loan payments of $180,000 a year (P+I)
Truck financing of $60,000 a year (P+I)
Operating lease on the yard of $48,000 a year

Total debt service = $180,000 + $60,000 + $48,000 = $288,000.

DSCR = $480,000 ÷ $288,000 = 1.67x.

For services or manufacturing, that's comfortably healthy. For construction, where lenders typically want 1.50x to 1.65x, it's right at the comfortable line — a banker would view a new loan application here favourably, but the business doesn't have so much cushion that one bad quarter would go unnoticed.

The threshold isn't 1.25x for everyone

Most calculators show a flat 1.25x threshold and call anything above it healthy. That's not how lenders actually work. Approximate minimums by lender type and industry:

SBA 7(a) loans: 1.15x minimum is the published floor, though most lenders want to see closer to 1.25x in practice
Most commercial term loans (services, manufacturing, retail): 1.20x to 1.25x
Construction and trades: 1.30x to 1.50x — project-based revenue is treated as more volatile
Restaurants and hospitality: 1.40x to 1.50x — seen as the highest-risk industry by most commercial lenders
Real estate / DSCR loans on rental property: often 1.0x to 1.20x depending on loan-to-value ratio

The calculator above uses industry-specific thresholds rather than a flat number. Pick your industry to see where you sit relative to what your kind of business actually faces.

What goes in EBITDA — and the add-backs lenders allow

The version of EBITDA on your tax return is rarely the version a lender will use. SMB underwriters routinely allow add-backs for items that distort earnings downward but aren't recurring or aren't real economic costs to a future owner. Common add-backs:

Owner's compensation in excess of market rate (the gap between what the owner draws and what a hired manager would cost)
Family payroll for non-working family members or above-market family compensation
Personal vehicle, phone, travel, or insurance expenses run through the business
One-time legal, professional, or settlement costs
Non-recurring repairs or relocations
Discretionary charitable contributions

Some lenders accept all of these; some accept fewer. The standard move before a loan application is to have your accountant prepare a schedule of EBITDA add-backs with documentation for each line. A legitimate add-back schedule can move DSCR by 0.10 to 0.30 — often the difference between approved and declined. Document everything; underwriters reject undocumented add-backs.

What goes in debt service

Total annual debt service includes:

Principal and interest on every term loan (SBA, equipment, vehicle, working capital, mortgages)
Lease payments on operating leases — most commercial lenders include these, though some don't. The calculator above lets you separate them so you can see DSCR with and without
Capital lease payments (functionally debt — always included)

Items that are not in debt service: lines of credit (if interest-only and not being amortized), accounts payable, vendor financing, owner draws, and merchant cash advances. Note on MCAs: they look like debt service in cash flow terms but they aren't treated that way by lenders. If you have MCAs, refinance them into term debt before applying for new credit — they're a red flag.

What to do if your DSCR is just below the threshold

The most common situation: DSCR is at 1.18x and the bank wants 1.25x. The application is on hold. What works in practice:

Document add-backs. Often the fastest path. A properly documented schedule of legitimate add-backs can lift EBITDA 5–15% on a typical owner-operated business.
Refinance existing debt to longer terms. A 5-year amortization refinanced to 7 years can drop monthly P+I by 20–30%, which moves DSCR meaningfully on its own. Most equipment lenders will renegotiate term length on performing loans.
Pay down a small loan to eliminate it from the denominator. A short-term loan with a high payment relative to its balance is a candidate. Sometimes a $40,000 paydown moves DSCR more than a $200,000 EBITDA improvement would.
Wait a quarter and rebuild trailing 12-month EBITDA. If you've had a recent revenue dip, the trailing-12 will recover quickly. Lenders will look at the updated number.
Switch lenders. Different banks have different thresholds and different risk appetites for your industry. A community bank may have a different view than a regional, and an SBA lender may take a 1.15x where a conventional commercial lender wouldn't.

Common mistakes

Using interest-only or partial-year debt service. DSCR uses annualized debt service — full P+I for a full year. If you took on a loan halfway through the year, gross it up to twelve months.
Forgetting leases. Most commercial lenders include operating leases in DSCR. Computing DSCR without leases and presenting it to a lender who includes them is the most common reason a borrower thinks their DSCR is fine when the bank disagrees.
Using book EBITDA instead of lender-accepted EBITDA. The version of EBITDA your accountant computes for tax purposes is rarely the version a lender will use. Get an add-back schedule before the application.
Including merchant cash advances as debt service. They're not, in DSCR terms — but they pull cash flow out of the business. Best to refinance them out before applying for new credit.
Trusting a single trailing-12-month number. Lenders look at trailing 12, trailing 24, and projections. A single bad quarter trailing-12 can mask a healthy business; a single good quarter can mask a struggling one.

FAQ

Is DSCR the same as Debt-to-Income?

No. Debt-to-Income is a personal lending metric (consumer mortgages, auto loans). DSCR is the business lending equivalent and uses operating cash flow rather than personal income.

My bank uses a different formula. Is the calculator wrong?

Probably not — DSCR has several common variants. The calculator uses EBITDA in the numerator, which is the most common SMB term-loan version. Some lenders use EBITDA minus capex (more conservative), or NOI for real estate loans. If your bank's formula is different, the inputs are the same; the math will produce a slightly different number. Ask your loan officer which version they use and you can adjust your inputs accordingly.

What if I have no debt right now?

DSCR isn't meaningful without debt. If you're considering taking on a loan, project the new debt service and compute DSCR against it — that's how lenders model new loan applications anyway. The calculator handles this if you enter the projected payments.

How quickly can DSCR move?

Faster than most ratios. Add-back documentation can move it inside a few weeks. A debt restructure can move it the day it closes. An EBITDA improvement takes a quarter or two to show up in the trailing-12-month number. The biggest mistake is waiting until the loan application to start working on DSCR — start three to six months before.

What does a covenant DSCR mean?

Many commercial loans include a DSCR covenant — a contractual minimum the borrower has to maintain. Falling below it is a technical default even if you're still making payments. If you have a DSCR covenant and you're close to breaching it, talk to your lender before the test date. A waiver requested in advance is standard; a breach reported after the fact is much harder to fix.