Tax Calculators calculators

32 calculators in Tax Calculators. Every one shows the tax year it used and the rules it applied.

Showing 25–32 of 32 in Tax Calculators · Open the Tax Calculators page

Tax Code CheckerAround 1 in 3 UK tax codes are wrong - and a wrong code means you're quietly overpaying (or building up a bill). Enter your tax code and find out in seconds whether it looks right, what it means, and what to do.
Tax Deadline TrackerThis tax deadline tracker shows every UK tax date you actually need to worry about in 2026/27, with a live countdown so nothing creeps up on you. Pick the deadlines that apply to you - Self Assessment, payments on account, VAT, PAYE or capital gains reporting - and see how many days you have left, then add them straight to your calendar. It is built for sole traders, landlords, company directors and anyone who files a tax return and would rather not pay a penalty for forgetting a date. All figures are checked for the 2026/27 tax year (6 April 2026 to 5 April 2027).
Tax Rebate CheckerMost UK taxpayers overpay. Answer a few quick questions and check what tax you could be owed - the rebates, reliefs and allowances you're missing, how much each is worth to you, and exactly how to claim it back.
Tax Refund EstimatorThis tax refund estimator helps you work out whether you have overpaid tax and roughly how much HMRC might owe you back for the 2026/27 tax year, plus the four years before it. It is built for employees on PAYE, people who changed jobs, anyone put on emergency tax, and those with job expenses they never claimed. Enter your income and the tax already deducted, and the tool compares it against the correct figure using current rates. You get a guide figure in seconds, so you know whether a claim is worth your time.
VAT CalculatorThis VAT calculator adds or removes UK VAT from any price in seconds, at the standard 20% rate or the reduced 5% rate. Type in a figure, choose whether it already includes VAT, and you get the net price, the VAT amount and the gross price side by side. It is built for sole traders, freelancers, small business owners and anyone checking a quote, an invoice or a receipt. No sign-up, no spreadsheet, and the same maths HMRC expects you to use. Below the tool you will find the formulas spelled out, worked examples with real numbers, and the mistakes that catch people out most often.
VAT Invoice CheckerThis VAT invoice checker tells you whether the document in front of you is a valid full VAT invoice you can actually reclaim VAT on. If a single required detail is missing, HMRC can refuse your input tax claim and you will have paid the VAT without getting it back. The tool runs through HMRC's checklist for you so you do not have to memorise it. It is for VAT-registered sole traders, limited companies and bookkeepers in the UK who want to clear the doubt before adding an invoice to a VAT return. Paste or enter the invoice details, and it flags what is present, what is missing and whether the document counts as full, simplified or neither.
VAT Number ValidatorOur UK VAT number checker lets you confirm whether a VAT number is correctly formatted and passes the HMRC checksum before you trust it on an invoice. Enter a GB number and we instantly validate its length and run the official mod-97 calculation, so you can catch typos and obvious mistakes in seconds. This is a format and checksum test, not a live registration lookup, so it helps you spot numbers that cannot be genuine before you reclaim input VAT or raise paperwork. Use it as a quick first line of defence whenever you receive a supplier invoice.
Couples Tax OptimiserThe UK taxes individuals, not households. The same savings account can be tax-free in one partner's name and taxed at 40% in the other's. Enter your figures above and see what holding the money in the right name would save, every year.

Every calculator, by category

Property & Tax

Self-Employed & Business

Property & Mortgage

Pensions & Retirement

Savings & Investments

Loans, Debt & Credit

Everyday Money

Software that files it for you

Partner links

If you keep your own books, these are the packages that handle Self Assessment and Making Tax Digital.

FreeAgent

4.8

Free optionMTD ready

The freelancer and contractor favourite, free with some bank accounts.

Free forever with a NatWest, Royal Bank of Scotland, Ulster or Mettle business account
Built-in Self Assessment and MTD for Income Tax filing

From £0 with a NatWest, RBS or Mettle account, otherwise about £19/mo

QuickBooks

4.6

MTD ready

The big all-rounder with the deepest MTD track record.

Sole Trader plan built specifically for Self Assessment and MTD
Snap and store receipts, automatic bank feeds

From about £10/mo, frequent 90% off intro offers

Xero

4.5

MTD ready

The scale-up choice once you have staff, stock or VAT.

Huge app marketplace and the accountant industry standard
Strong for VAT, payroll and multi-user limited companies

From about £15/mo

We may earn a commission if you sign up through one of these links. It never changes what we calculate, what we recommend, or the order they appear in.

Deadlines, rate changes and what to claim

One email when something changes that affects your money. No daily send, no sponsored filler. Unsubscribe whenever.