Invoice Tax Calculator
Total an invoice that mixes tax rates. Write one line per item with quantity, unit price and tax rate – lines without a rate use the default. An invoice discount is applied before tax. The calculator shows the subtotal, the tax for each rate on the amount it applies to, the total tax, the effective rate and the invoice total – the breakdown most tax authorities expect on an invoice.
- Runs in your browser
- No sign-up
- Free to use
Leave out the tax % to use the default rate below.
Applied before tax.
Tax rates are the ones you enter; check what applies to your invoices.
How to use Invoice Tax Calculator
- Write each line: description | qty | price | tax %.
- Set the default rate.
- Add an invoice discount.
- Copy the totals onto your invoice.
Invoice Tax Calculator features
Mixed rates
Standard, reduced, zero.
Breakdown by rate
As required on invoices.
Discount before tax
Applied to each line.
Effective rate
Tax ÷ net.
Paste from spreadsheets
Tab or | separated lines.
Any currency
Choose from 30+ currencies; amounts are formatted for it.
When to use Invoice Tax Calculator
- Freelancer and small business invoices.
- Checking supplier invoices.
- Mixed goods and services.
- Preparing tax returns.
Invoice Tax Calculator FAQ
Why show tax per rate?
Many countries require invoices to state the net amount and tax for each rate.
Is the discount applied before tax?
Yes – tax is calculated on the discounted amount.
What about exempt items?
Enter 0 as the rate.
Does it know my country’s rates?
No. Use the rates that apply to you.
Should a discount be applied before or after tax?
Usually before tax, so tax is charged on the discounted price. Local rules can differ, especially for vouchers and early-payment discounts.
Invoices with several tax rates
Mixed invoices are common: services at the standard rate, books or food at a reduced rate, training sometimes exempt. Grouping tax by rate keeps the invoice correct and makes bookkeeping easier.
Rounding rules differ; some countries round per line, others per rate. Check your local rule if totals differ by a cent.
Example: two items at 50 with 20% tax and one item at 30 with 5% tax give a net total of 130, tax of 21.50 (20 + 1.50) and a gross total of 151.50. With a 10% invoice discount applied before tax, the net becomes 117 and the tax 19.35 (18 on the 90 at 20%, 1.35 on the 27 at 5%), for a total of 136.35.
Invoices with mixed rates should show the net amount and tax for each rate separately, which this calculator does. Rules on which rate applies to which product, and on how discounts are treated, differ between countries – confirm them with your tax authority or accountant before issuing invoices.