Invoice total calculator
Build invoice line items with quantities, unit prices, discounts and VAT. Shows subtotal, tax breakdown, shipping and grand total.
- Free, no sign-up
- No data stored
- Reviewed 2026-01-15
Your details
Results
Error no lines
About the Invoice Calculator
Add line items with description, quantity and unit price to calculate an invoice total. The tool applies the selected country's VAT rate, an optional discount and shipping costs.
For contractors, a withholding tax field deducts the payer's tax retention from the gross total. The result shows subtotal, VAT, discount, shipping, withholding and the amount due.
How to use the Invoice Calculator
- Add line items with quantity and unit price.
- Select the country or set a custom VAT rate.
- Optionally add a percentage discount.
- Add shipping and withholding tax if applicable.
- Review the total breakdown.
Frequently asked questions
Can I add multiple line items?
Yes. Add as many lines as needed. Each line shows its own subtotal. VAT and discount are applied to the combined subtotal.
What is withholding tax?
In some countries (e.g. Turkey, Italy) the payer retains a percentage of the gross amount and pays it directly to the tax authority on behalf of the supplier.
Does this generate a PDF invoice?
No. This calculates the totals. Use the results with your invoicing software or template for the final document.