Corporation Tax & Marginal Relief Calculator (UK)

Applies small profits rate, main rate, and Marginal Relief. Limits auto-adjust for associated companies.

Taxable total profits (£)

Enter a valid non-negative amount.

Associated companies (number)

Disclaimer: This calculator provides a simplified estimate based on UK Corporation Tax and marginal relief rules. Figures are for illustration only and do not constitute tax advice. Rates, thresholds and calculations can vary depending on your accounting period, associated companies and other factors. Always seek professional advice before making decisions.
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