Quick answer
Debt service cover ratio (DSCR) divides a business's cash earnings by its scheduled principal and interest payments for the same period; interest cover (ICR) divides earnings by interest alone; leverage compares total debt with EBITDA. Lenders calculate each using their own definitions and adjustments, so an SME's management-accounts figure can differ from the bank's. Know the definitions in your facility letter before you rely on the number.
Key points
- DSCR includes principal; ICR doesn't — a business can pass one and fail the other.
- Lenders normalise EBITDA: owner drawings, one-offs and related-party items are adjusted.
- Your facility letter's definitions override any textbook formula.
- Structure — term, amortisation, security — changes the ratio as much as earnings do.
Why do three ratios dominate every credit paper?
When a credit analyst assesses an established SME, most of the decision rests on three questions. Can the business pay the interest? Can it pay the interest and the principal? Is the total debt sensible relative to what the business earns? The ratios that answer them — interest cover, debt service cover and leverage — appear in almost every credit paper and in many facility covenants.
Understanding how they’re calculated, and particularly how a lender adjusts your numbers, is one of the highest-value skills a finance lead can bring to a funding conversation. It explains why a business that looks healthy in its own management accounts can be told it’s “outside appetite”.
How is each ratio calculated?
| Ratio | Basic formula | What it tells the lender |
|---|---|---|
| Interest cover (ICR) | EBIT or EBITDA ÷ interest expense | Can earnings meet the cost of the debt? |
| Debt service cover (DSCR) | Cash earnings ÷ (interest + scheduled principal) | Can earnings meet all required debt payments? |
| Leverage | Total debt ÷ EBITDA | How many years of earnings the debt represents |
| Gearing | Debt ÷ equity (or debt ÷ total assets) | How much of the business is funded by lenders |
A few points trip people up:
- ICR ignores principal. A business can have strong interest cover and still fail debt service cover if it has short amortising loans.
- DSCR’s “cash earnings” is rarely raw EBITDA. Lenders subtract items that consume cash every year.
- Leverage uses total debt, often including equipment finance, shareholder loans in some definitions, and sometimes lease liabilities.
The debt service cover calculator lets you test cover before and after a proposed facility using your own dollar figures.
How do lenders adjust EBITDA?
This is where the analyst’s number departs from yours. Common adjustments:
Deductions
- Owner or director drawings above a commercial salary for the role
- Tax actually paid (for cash-based cover measures)
- Maintenance capital expenditure — the spending needed just to keep the business operating at its current level
- Dividends or distributions, where they’re a regular call on cash
Add-backs (accepted cautiously)
- Genuine one-off costs: a restructure, a legal settlement, a relocation
- Non-cash items beyond depreciation and amortisation
- Owner salaries above market, if the lender accepts they’ll be reduced
Exclusions
- One-off income: asset sales, insurance recoveries, government grants
- Related-party revenue at non-commercial pricing
Every add-back you propose should be documented. A list of “one-offs” that recurs every year will be treated as a normal cost.
Your facility letter overrides the textbook
If you have existing facilities with covenants, the letter of offer or facility agreement defines each term. “EBITDA”, “Debt”, “Interest”, “Debt Service” and the test period are all defined — often in ways that differ from accounting standards and from other lenders’ letters.
Before a test date, recalculate using the exact definitions. If you’re unsure whether a covenant will be met, the page on covenant breaches explains the options, including raising it with the bank before the test rather than after.
For businesses covered by it, the 2025 Banking Code of Practice limits some default triggers in standard-form small business loans — for example, no default based on unspecified material adverse change — while allowing financial indicator covenants in certain loan types. It doesn’t remove covenants generally, so the definitions still matter.
Worked example: same business, three answers
Illustrative only; no real business. A manufacturer reports EBITDA of $2.1 million in its management accounts. It has $4.2 million of debt, annual interest of about $300,000 and scheduled principal repayments of $900,000.
| Measure | Management view | Lender-adjusted view |
|---|---|---|
| EBITDA | $2.1m | $1.75m (after $200k excess drawings and $150k maintenance capex) |
| Interest cover (EBITDA ÷ interest) | 7.0x | 5.8x |
| DSCR (cash earnings ÷ P+I of $1.2m) | 1.75x | 1.46x |
| Leverage (debt ÷ EBITDA) | 2.0x | 2.4x |
Nothing about the business changed between the two columns. The lender simply measured it differently. If the business now asks for another $1 million of term debt with $250,000 of annual principal and around $70,000 of extra interest, the lender-adjusted DSCR falls to roughly 1.15x. That’s the number the credit decision will turn on.
Want to know how a lender would read your ratios before you apply? Ask a specialist for an early view — there’s no credit check at the enquiry stage.
How can you improve the ratios?
Earnings aren’t the only lever. Structure changes the denominator.
Extend the amortisation. Spreading principal over a longer term reduces annual debt service. A five-year term on a long-life asset may be unnecessarily punishing.
Refinance expensive short-term debt. Daily or weekly repayment facilities can dominate the debt service line. Consolidating them often lifts DSCR materially — see consolidating business debt.
Match facility type to purpose. Working capital swings belong in revolving facilities, not amortising term loans. Moving the swing out of term debt reduces scheduled principal.
Use security. Property-backed facilities, from $20,000 to $5,000,000, are assessed with more weight on security and exit. That can open structures — longer terms, interest-only periods — that a purely cash-flow lender won’t offer.
Clean up the add-backs. Commercialise owner salaries, document genuine one-offs, and separate related-party arrangements before a review.
Time the request. Present after a strong set of results rather than during a weak quarter.
What lenders read alongside the ratios
Ratios start the conversation; they rarely finish it. Analysts also weigh:
- Trend. Improving cover with a credible reason carries more weight than a single good year.
- Quality of earnings. Recurring revenue, diversified customers and stable margins. Concentrated revenue attracts closer scrutiny — see our guide on customer concentration.
- Working capital. A business whose cash conversion cycle is lengthening may show fine ratios today and poor ones next year. The working capital cycle calculator helps you spot it.
- Security and exit. How the lender recovers if the forecast is wrong.
- Management. Whether the finance function produces timely, reliable information.
A ratio pack for your next funding request
Include a one-page ratio summary in any funding proposal or annual review pack:
- EBITDA as reported, with a reconciliation to your adjusted figure
- Each adjustment explained in one line
- ICR, DSCR and leverage — historical and pro forma after the proposed facility
- Headroom against any existing covenants, using the facility’s definitions
- A sensitivity: the same ratios if EBITDA fell by a stated amount
It saves the analyst time and signals a finance function that understands its own numbers. Our guide on writing a funding proposal shows where it fits.
Cover in a seasonal business
Annual ratios can hide seasonal strain. A business that earns most of its profit in six months may pass an annual cover test yet struggle to meet fixed monthly repayments in the quiet months. If that’s you, show the lender a monthly cash forecast alongside the annual ratios, and consider structures with repayment profiles that follow the season or a revolving limit that absorbs the trough.
Ratios and your personal guarantees
For most established SMEs, directors guarantee the business’s debt. That makes the ratios personal. A structure that keeps cover comfortable in a weaker year protects not only the business’s facilities but the guarantors’ own assets. When you weigh a larger facility against a smaller one with more headroom, factor in that exposure — the cheapest structure on paper isn’t always the safest one to sign.
Put your ratios to work
If your ratios are strong, they’re an asset in any negotiation. If they’re tight, the structure of the next facility matters more than its price. Either way, a specialist can tell you quickly how your numbers are likely to be read.
Enquiring doesn’t involve a credit check. We don’t send your figures to a list of lenders — a specialist reviews them and approaches the funder whose assessment suits your business. Please complete the form accurately, including existing repayments and security, so the conversation starts from the real numbers. See if you qualify.
Frequently asked questions
What's the difference between DSCR and ICR?
Interest cover compares earnings with interest only. Debt service cover compares earnings with interest plus scheduled principal repayments. A business with a short amortising term loan can have comfortable interest cover and still struggle on debt service cover.
Why does the bank's EBITDA differ from ours?
Lenders normalise earnings. They may deduct owner drawings above a commercial salary, maintenance capital spending or tax paid, and add back genuine one-offs. They may also exclude income they consider non-recurring. Check the definitions in your facility letter.
What DSCR do lenders require?
It varies by lender, security, industry and facility. Your existing facility letter may set a minimum. Property-backed lenders tend to weight security and exit more heavily, while cash-flow lenders lean harder on cover ratios.
How can we improve DSCR without raising earnings?
Extend amortisation terms, refinance expensive short-term debt, use interest-only periods where appropriate, or move part of the debt to a revolving structure. Each changes the annual repayment line.
Do lenders use historical or forecast figures?
Usually both. Historical results show what the business has delivered; forecasts show whether the proposed debt is serviceable. Lenders give more weight to history and discount aggressive forecasts.