Get in touch

What you can contact us about

• Corrections — spotted a figure, rate, or result that looks wrong? Tell us which calculator and what you expected, and we'll check it. This is the most valuable message we receive, and it goes to the front of the queue.
• Suggestions — a calculator you wish existed, or a feature that would make an existing one more useful. Requests that describe the situation you were trying to work out are far more useful to us than a bare tool name, because the situation tells us what the tool actually has to handle.
• General questions — how a calculator works, what a particular input means, or why two tools give different answers for what looks like the same question.
• Business & advertising — partnership, licensing, or advertising enquiries. Please include the organisation you're writing on behalf of and what you're proposing; we don't accept placements that affect calculator results or editorial content.
• Privacy — any question about how the site handles data, or a request relating to your own (see our Privacy Policy).

How to write a message we can act on quickly

Most reports that stall do so for one reason: we can't reproduce what you saw. A calculator that is broken for everyone is easy to find and easy to fix; one that misbehaves only for a particular combination of inputs is invisible until someone shows us the combination. If you're reporting a wrong or surprising result, the following turns a message we have to guess at into one we can chase down the same day.

• Which calculator, ideally the page address — several tools have US and Canadian versions, and the answer to "the tax calculator is wrong" depends entirely on which one you were using.
• Exactly what you entered — the actual figures and selections, including the province or state and the tax year, not a rounded description of them.
• What the page showed you and what you expected instead.
• Where your expected number comes from, if you have a source — an official worksheet, a payslip, a published table. A reference to check against is the single fastest way to settle whether the difference is a bug or a difference in assumptions.
• Your device and browser, if the problem is a display or layout issue rather than a number.

Please don't send personal identifiers. We never need a Social Insurance or Social Security number, an account number, or a photograph of a tax document to investigate a calculation — the figures alone are enough, and sending less keeps you safer.

What happens to your message

A real person reads every message. We aim to reply within a few business days, and we act quickly on reported errors because accuracy is the whole point of the site. There's no account to create and nothing to pay — just fill in the form above and send.

Reported errors are triaged first. We try to reproduce the result you described, then trace it back to the source figure or the formula to work out whether the tool is wrong, the underlying data is out of date, or the calculator is behaving correctly under an assumption that wasn't clear enough on the page. All three outcomes lead to a change: a fix, a data refresh, or better wording. Where a correction affects the numbers a page produces, the page's review date is updated as well, so other readers can see it has been checked. Suggestions are kept and weighed against what people ask for most; we can't build everything, and we'd rather say so than leave you waiting on a tool that isn't coming.

Before you write

A few questions have quicker answers than we can give by email. If you're wondering where a rate came from or how a formula was chosen, our About page sets out the sources and the method in detail. If your question is whether a result can be relied on for filing, borrowing, or a health decision, the Disclaimer answers it directly — and the short version is that these tools produce estimates, not advice.

One thing we genuinely can't help with: personalised financial, tax, or medical guidance. We're not able to tell you which option to choose, what to claim, or what to do about a specific health situation, because that requires knowing your full circumstances and carrying a professional responsibility we don't have. Questions about how a calculator works are always welcome; questions about what you personally should do are for a qualified professional.

Remember: anything you type into a calculator stays in your browser — it's never sent to us or stored. Details you put in the form above are, of course, sent to us so we can reply, and are handled as described in our Privacy Policy.