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Corrections first, everything else after. If a formula on this site produces the wrong answer, that is the message worth sending.

Reporting a calculation error

The fastest way to get something fixed is to include:

• The calculator you used and the exact values you entered
• The result you saw and the result you expected
• How you arrived at the expected figure — a spreadsheet formula is ideal

Verified errors are corrected and the affected calculator's review date is updated, as described in the methodology.

Suggesting a calculator

Useful suggestions describe the decision, not just the tool: what you are trying to work out, which figures you already have, and what you currently do instead. Tools that solve a decision get built first.

What cannot be answered

Questions about your specific accounts, tax position or financing fall outside what this site does, and no individual financial, accounting or tax advice can be given. Those belong with a qualified professional who can see your full picture.