Tools
Free calculators built on the 2026/27 rates
Each tool runs in your browser, stores nothing, and uses figures verified against GOV.UK: personal allowance £12,570, dividend rates 10.75% and 35.75%, employer National Insurance 15% above £5,000, Corporation Tax 19% to 25%, VAT threshold £90,000. They give estimates for illustration; the service pages explain what a person would do with the answer.
Take-home pay: sole trader vs limited company
Enter your expected profit and see what you keep as a sole trader and through a limited company for 2026/27, including Scottish rates.
Dividend vs salary calculator
Compare the total tax on different salary levels for a company director taking the rest as dividends, using 2026/27 Corporation Tax, NI and dividend rates.
VAT threshold tracker
Enter your last twelve months of taxable turnover and see how close you are to the £90,000 VAT registration threshold and when you would have to register.
Late filing penalty estimator
Estimate the automatic penalties for a late Self Assessment return, late CT600 or late Companies House accounts from the deadline, the filing date and the tax due.
Tax deadline finder
Choose how you trade and enter your company year end to get a dated list of your HMRC and Companies House deadlines for the next twelve months.
Company name availability check
Search the Companies House register for a company name before you incorporate or change your name, and see the rules that can still block it.
About these tools
How they are built and what they leave out
The calculators share one set of rates, the same file that drives the deadline strips and the fee pages on this site, so a change in the law is corrected in one place. Each tool page explains its method and its limits in plain English below the form. None of them can see your full position: other income, reliefs, losses, pension contributions, residence and family circumstances all change the answer, and that is what our fixed-fee planning reviews are for.
Nothing you type is sent to us or stored, with one exception: the company name check sends the name you type to our server, which looks it up on the public Companies House register and returns the result without keeping it. Read the advice disclaimer before relying on any figure.
Numbers raise questions. We answer them for a fixed fee.
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