Invoice Total Calculator
Calculate an invoice's grand total from a subtotal, discount, tax and shipping. Choose whether the discount applies before or after tax to see exactly how the total is built up.
Input
Added after discount and tax — not itself discounted or taxed.
Output
| Line | Amount |
|---|---|
| No data yet | |
Estimates for preliminary checking only, not an official accounting record.
Guides
The Invoice Total Calculator rolls a subtotal, a percentage discount, tax and shipping into a grand total — a quick way to check an invoice or quote before you send it.
Discount before tax, or after?
Invoicing tools rarely say which order they apply a discount and tax in, and it matters for the breakdown your customer sees (even though, for a single percentage discount and a single tax rate, the final total comes out identical either way — only the intermediate "taxable amount" and "discount amount" lines differ). This calculator makes the order an explicit setting:
- Before Tax — the discount is subtracted from the subtotal first, and tax is charged on the discounted amount. This is how most retail invoices and point-of-sale systems work.
- After Tax — tax is charged on the full subtotal first, and the discount is taken off the taxed total. Less common, but some billing systems (and some jurisdictions' rules) expect it.
Shipping and handling is added last, after both discount and tax, and is never itself discounted or taxed.
How to use it
- Enter the subtotal, then the discount % and tax %.
- Choose whether the discount applies before or after tax.
- Add any shipping/handling charge.
- Read the full breakdown — discount amount, taxable amount, tax amount and grand total — and copy or download it as CSV.
Is this an official invoice?
No — it's a quick estimate for checking your math before you send an invoice or quote. It doesn't handle multiple line items, currency conversion, or country-specific tax rules. For actual invoicing, use dedicated accounting software.
Privacy
All calculations run entirely in your browser. No invoice data is sent to a server or stored anywhere.
Related tools
To calculate sales tax or VAT on its own, use the Sales Tax / VAT Calculator. For markup and margin math instead of a full invoice breakdown, try the Discount & Markup Calculator.