Invoice Total Calculator
Enter a subtotal, tax rate, and discount to calculate the final invoice total.
How to use this calculator
- 1Enter the subtotal of the line items.
- 2Add the tax rate and any discount percentage.
- 3Read the final invoice total your client owes.
How the Invoice Total Calculator works
An invoice total is rarely just the subtotal. You usually apply a discount first, then add tax on the discounted amount, to reach the figure the client owes. Getting the order right matters — taxing before discounting produces a different, and usually incorrect, total.
This calculator combines subtotal, tax and discount in the standard order so you can quote a firm number in seconds, then turn it into a real invoice with Aviy’s free generator.
Ready to bill for it?
Create a professional invoice in one sentence with Aviy’s free AI invoice generator.
Create an invoice freeFrequently asked questions
Is tax applied before or after the discount?
This tool applies the discount first, then tax on the discounted amount — the most common convention. Check your local rules if unsure.
Can I make an invoice from this?
Yes — once you have the total, create a professional invoice free with Aviy’s AI invoice generator.
How do I calculate an invoice total by hand?
Discount the subtotal, add tax on the discounted amount, and sum them. This tool does it as you type.
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