2 min read
Interest cover = operating profit / interest payable. Lenders watch it to check profit comfortably covers interest.
How to use it
Enter your figures above — the result updates instantly and nothing leaves your browser. Results are illustrative, not a quote or credit decision.
How to interpret the result
The result on its own is a snapshot, not a verdict. A comfortable multiple in a single period means less if it has been trending downward, or if it rests on one unusually strong period rather than a settled pattern of trading. Lenders assessing a limited company will usually want to see the ratio held over more than one period, alongside an understanding of why it moved.
A thin result is not automatically disqualifying, and a strong one is not automatically reassuring. Context matters: a company carrying seasonal revenue, a recent capital investment, or a one-off cost will read differently to a lender than a business with flat, predictable earnings. Treat the output as a prompt to ask why the number is what it is, not as the final word.
Limitations and good practice
This calculator works from the figures you enter and assumes operating profit and interest payable are both reasonably stable and correctly stated — it cannot judge the quality of the underlying accounts, adjust for one-off items, or reflect facilities not yet drawn. It is an illustration, not an assessment of your company, and does not replace management accounts or a lender's own review.
Good practice is to recalculate periodically rather than once, to keep the inputs consistent with figures a lender would actually see in your accounts, and to look at this measure alongside a related one — for example a loan affordability (debt service cover) check or, where lease and rent commitments are material, a fixed charge cover calculation — so no single ratio is read in isolation.
Frequently asked questions
What cover do lenders want?
Often 2–3× or more. Below ~1.5× a lender will look hard at affordability.
Is this a quote?
No — it's a free illustration. Your actual Creditcorp offer depends on an assessment of your company.
Related reading

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Whether profits comfortably cover the dividends you pay out.
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Loan affordability (debt service cover) calculator
How comfortably your cash flow covers loan repayments — the ratio lenders use to gauge affordability.
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Fixed charge cover calculator
A stricter cover test that counts lease and rent commitments, not just loan interest.
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Late payment interest calculator (UK statutory)
What a UK business can charge on a late commercial invoice — statutory interest plus fixed compensation.
Read →Funding for UK limited companies
Creditcorp lends to your company, not to you personally — short-term working capital with no personal guarantee. See what your business could access.