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Found a mistake in one of our calculators? Got a suggestion for a tool we should build? Or just have a question? Send us a message — we read everything and reply within a couple of working days.
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Before you message about a calculator result...
Our tools use the standard HMRC formulas and current UK rates. If your result looks different from what a professional told you, it's likely because your specific situation has factors (like allowances, reliefs, or contract terms) that a general calculator can't account for. Happy to look into it if something seems genuinely off though.