Frequently asked questions

Yes. Every calculator and the invoice generator are free, with no account, trial period or payment required. We may show advertising on the site in future, and some links to business software may be affiliate links, but neither changes what a tool does or what you pay for it.

No. There is no sign-up, and nothing you type into a calculator is tied to an identity. You can close the tab and come back whenever you need a figure.

No. Every calculation runs in your own browser, and the invoice generator never sends your business details, customer details or bank details anywhere. Nothing is uploaded, so there is nothing for us to store, lose or share. Closing the tab clears the form.

No. These are arithmetic tools plus general information. They help you work out figures accurately, but they do not know your circumstances and are not a substitute for advice from a qualified accountant or tax adviser. For anything with a real consequence, confirm the position with HMRC guidance or a professional.

The VAT calculator supports the UK standard rate of 20%, the reduced rate of 5%, the zero rate of 0% and any custom rate you enter. Which rate applies to your goods or services depends on what you sell, so check the GOV.UK guidance for your specific supply rather than assuming the standard rate.

Yes. It is a document builder: you enter your own business details, including your VAT number if you are VAT registered, and it produces a professional invoice you can download as a PDF or print. It does not submit anything to HMRC and it is not accounting software.

The calculations use the formulas set out on each page and round currency to two decimal places, which is how invoices are normally presented. Every tool shows the working so you can check it. Where a business decision depends on the figure, reproduce the calculation against your own records.

Only essential cookies are used by default. Analytics and advertising cookies are off until you agree to them, and you can change your choice at any time using the Cookie settings link in the footer.

Please do — corrections are genuinely welcome. Use the contact page and tell us the tool, the figures you entered and the result you expected. We investigate every report of an incorrect calculation.

Yes. Every page is built mobile-first, uses numeric keypads for number fields and keeps tap targets large enough to use one-handed. The invoice generator previews and downloads on mobile as well as desktop.