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2025/26: 19% up to £50,000, 25% above £250,000, with marginal relief (fraction 3/200) tapering between — an effective 26.5% on profit in that band.
How to use it
Enter your taxable profit. The calculator applies the 2025/26 corporation tax rates — 19% below £50,000, 25% above £250,000 — and the marginal relief that tapers the rate for profits in between, so you see the real bill rather than a flat guess.
Because of how marginal relief works, each extra pound of profit between £50,000 and £250,000 is effectively taxed at 26.5% — higher than the headline 25%. That's worth knowing before you decide the timing of income or a bonus. Thresholds are shared across associated companies.
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Frequently asked questions
Why is the marginal rate 26.5%?
Marginal relief claws back part of the gap between 19% and 25% as profits rise through the band, so profit in the £50k–£250k window is effectively taxed at 26.5% at the margin — steeper than the top rate itself.
Do associated companies change the thresholds?
Yes — the £50,000 and £250,000 limits are divided by the number of associated companies. If you run more than one company, each one's thresholds are lower, which can push you into marginal relief sooner.
Is this a quote?
No — it's a free illustration. Your actual Credicorp offer depends on an assessment of your company.
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Credicorp lends to your company, not to you personally — short-term working capital with no personal guarantee. See what your business could access.