Total up an invoice in seconds. Enter the subtotal, a tax rate, and any discount, and see the tax, discount, and final total to bill.
Applies the discount to the subtotal first, then tax on the discounted amount (the common method). Your local tax rules may differ.
Subtract any discount from the subtotal, add tax on the discounted amount, and that's the total to bill. A $1,000 subtotal with an 8% tax and no discount comes to $1,080.
Total = (subtotal − discount) × (1 + tax rate)
Take the subtotal, subtract any discount, then add sales tax on what's left. This tool shows the discount, tax, and final total for you.
Usually after — the discount comes off the subtotal first, then tax is charged on the reduced amount. That's how this calculator works.
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Yes. The Invoice Total Calculator is completely free, runs in your browser, and never asks for a signup, email, or download. Enter your numbers and the result updates instantly.
It uses standard formulas and recalculates the moment you change a value, so the math is exact for the inputs you enter. Treat the result as a reliable planning estimate; for decisions with legal or tax consequences, confirm the figures with a qualified professional.
Yes. The calculator is mobile-friendly and works on any phone, tablet, or computer — there is no app to install and nothing to save.
Yes. Scroll to “Add this free calculator to your site” above and copy the embed snippet to place the live calculator on your blog or website for free.
Last reviewed: September 2026. Free to use, no signup — Invoice Total Calculator by ToolWise Digital.
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