UK VAT Calculator 2026/27 is a free, client-side web tool from UK Creative Ventures that performs VAT calculations for the 2026/27 UK tax year. It adds or removes VAT at the standard 20%, reduced 5%, and zero 0% rates, tracks rolling 12-month turnover against the £90,000 HMRC registration threshold, and compares standard VAT accounting against the flat rate scheme. No sign-up is required, and no data is sent to any server.
What is the UK VAT Calculator?
The UK VAT Calculator is a free web-based tool that performs three core VAT functions: calculating VAT on net or gross amounts at 20%, 5%, or 0% rates; tracking monthly turnover over a rolling 12-month period against the £90,000 HMRC registration threshold; and comparing standard VAT accounting against the flat rate scheme for eligible businesses. It runs entirely in the browser with no data transmitted to any server, and was updated in April 2026 to reflect current HMRC rates and thresholds.
Key Features
- VAT rate selection — Choose between standard 20%, reduced 5%, or zero 0% rates, with a note explaining that zero-rated supplies still count toward the registration threshold.
- Add or remove VAT — Toggle between ex-VAT (add VAT) and inc-VAT (remove VAT) modes, with instant display of net amount, VAT amount, and gross total.
- Threshold tracker — Enter monthly turnover for the last 12 months to see the rolling total compared against the £90,000 HMRC registration threshold, with status indicators (Safe, Approaching, Over threshold).
- Month-by-month breakdown — A table shows each month's revenue, rolling 12-month total, and status, with a warning when the threshold is exceeded.
- Flat rate scheme comparison — Input annual gross turnover and VAT-able purchases to compare standard VAT accounting against the flat rate scheme, with sector-specific HMRC flat rate percentages (e.g., Advertising 14.5%, Software development 8.5%, Limited cost business 16.5%).
- Savings calculation — Automatically calculates annual VAT payable under both schemes and shows the potential annual saving from using the flat rate scheme.
Who is it for?
- Small business owners — Calculate VAT on invoices and sales at the correct rate without manual arithmetic.
- Sole traders approaching the threshold — Track rolling 12-month turnover to know when VAT registration becomes mandatory.
- Businesses considering the flat rate scheme — Compare standard VAT accounting against flat rate percentages to see which approach saves more money.
- Accountants and bookkeepers — Quickly verify VAT calculations and threshold status for multiple clients.
What can you do with the UK VAT Calculator?
- Invoice preparation: Calculate the VAT amount and gross total for a net price at 20%, 5%, or 0% — for example, £2,500 net at 20% produces £500 VAT and £3,000 gross.
- Threshold monitoring: Enter up to 12 months of turnover figures to see the rolling total and receive a warning if the £90,000 registration threshold is exceeded, with a note that HMRC must be notified within 30 days.
- Flat rate scheme evaluation: Input annual gross turnover and VAT-able purchases, select a business sector, and see the annual VAT payable under both standard and flat rate schemes, including the specific saving amount.
How does the UK VAT Calculator work?
The calculator operates in three tabs. The VAT calculator tab takes an amount and a rate, then instantly shows net, VAT, and gross figures. The threshold tracker tab accepts monthly turnover inputs for the last 12 months and displays the rolling total against the £90,000 threshold with a month-by-month status table. The flat rate scheme tab takes annual gross turnover, VAT-able purchases, and a business sector, then compares standard scheme VAT payable against flat rate VAT payable, showing the annual saving.
Pricing
The tool is completely free to use with no sign-up required. It is a client-side application, meaning no data
