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Plain-English guides to UK Corporation Tax and CT600 filing.

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21 February 2026

Corporation Tax Interest: Late Payment Rates, Repayment Interest & How to Avoid Charges

HMRC charges interest on late corporation tax at base rate + 4% — currently 7.75%. Learn current rates, how interest is calculated, and how to avoid it.

corporation tax interest late payment hmrc repayment interest ct600 penalties