Enter net line amounts after discounts. VAT is rounded to the nearest penny per line.
Illustrative estimate. Check the rate and scheme eligibility for your transaction. No amounts are sent by this calculator.
Build your invoice calculation
Add one row per net line amount after discounts. Enter a short description, the net amount and the rate. Use Add invoice line for more rows or Remove to delete one. A line amount represents its full quantity total: for three items at £30 each, enter £90.
Example with more than one rate
Suppose a qualifying line has a £100 net amount at 20% and another has £200 net at 5%. The first contributes £20 VAT and the second contributes £10. Combined net is £300, VAT is £30 and the customer total is £330. The £30 tax is not 20% of the combined net.
Rounding method
This calculator rounds each line’s VAT to the nearest penny before adding the totals. Net line amounts are rounded to pennies too. Other permitted accounting methods can differ by a penny; apply a consistent method and check Notice 700 when reconciling your accounting software.
Is the result a VAT invoice?
No. It is a calculation worksheet, not a downloadable legal invoice. Your invoice also needs the required identification, dates, descriptions and tax details. Zero-rated rows are supported, but a zero entry does not encode exemption or a reverse charge. Handle those treatments in your invoicing system.
Quick answer
Can I use the result without saving an account?
Yes. Calculations run in your browser. Copy the figures into your own records; refreshing the page resets the inputs.
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Official sources
Sources checked: 2026-09-26. Check the official guidance for later changes.
Educational information and estimates. These tools do not submit VAT returns or determine the treatment of a specific transaction.