Get in touch
One address, and it reaches me directly: hello@swiftsums.com.
There is no contact form, no ticket number and no chatbot. SwiftSums is run by one person, so a form would only be a slower way of sending the same email.
Reporting a wrong answer
This is the message I most want to receive, and there are four things that turn “the tax one looks wrong” into something I can actually fix:
- Which calculator, by page name or link.
- What you typed in. The actual numbers, so I can reproduce it.
- What it told you.
- What you expected instead, and why. Another site, your own working, a professional's figure, or simply that it looked off.
That last one matters more than it sounds. Knowing where your expectation came from is often what separates a genuine bug from a difference in convention. And if the two of us disagree about which is which, that is usually a sign the page has not explained itself well enough, which is also worth fixing.
If you are unsure whether something is a bug, send it anyway. A false alarm costs me a few minutes; a real error left in place costs whoever relies on it next.
Other things worth sending
A calculator that does not exist yet. Especially if you have looked and the alternatives were bad. Tell me what you were trying to work out and why.
Something that is technically right but explains itself badly. If you had to read a page twice, or the answer was correct but you could not tell why, that is a real problem even though nothing is broken.
Accessibility problems. A control you cannot reach by keyboard, text that will not resize, contrast you cannot read, anything that behaves badly with a screen reader. These get treated as bugs, not preferences.
Anything that broke. A blank result, a page that will not load, a number that stops updating. Your browser and device help, if you know them.
What to expect back
SwiftSums is built and maintained by one person around a full-time job, so replies are not instant, usually a few days. Every message is read by me, and none of them go to a queue that nobody looks at.
Corrections are prioritised over everything else. If you report a calculation error and you are right, the fix is generally published within a day or two of my confirming it, and I will tell you when it is live.
What I cannot do is answer questions about your particular situation: whether a loan is a good idea, what your tax will be, what a health figure means for you. Those need a professional who knows your circumstances, and I am not one.