Invoice total calculator

Calculate an invoice total after a percentage or fixed discount and an editable VAT or tax rate. Check the discount, taxable subtotal, VAT amount and final invoice total before sending or paying an invoice.

3 guest runs per rolling 24 hours10 with a free accountPrivate inputsMobile-friendly

Invoice total calculator workspace

Runs locally in your browser

Result

Grand total—

After discount—

Discount amount—

Tax amount—

Use it with confidence

How to use the invoice total calculator.

Add the requested inputs

Use the labelled fields in the workspace above. If example values are provided, try them first or replace them with your own.

Calculate and review

Use the main action when needed. Discounted subtotal = subtotal − discount. Tax = discounted subtotal × rate. Total = subtotal after discount + tax.

Try a worked example

Start with the line-item subtotal, apply any discount, then add the entered VAT rate.

Check the assumptions

Real invoices may have mixed VAT rates, per-line rounding or shipping rules that need line-by-line review.

Helpful answers