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What to write to us about

These get a reply quickly.

• A result you think is wrong. Send the numbers you entered, the answer you expected and which calculator you used. Every formula on this site is checked against the same arithmetic your accountant would use, so a mismatch is worth investigating.
• A calculator you need that is missing. Tell us the inputs you have and the figure you want out.
• Permission and reuse. Linking to any page is fine and needs no permission. Copying the tools is not.

Support questions about your own accounts, tax position or pricing strategy are outside what we can help with. An accountant who can see your books will give you a better answer than we can.