Why use an online invoice generator?
You need a clean invoice fast when a buyer is ready to place an order. Instead of cloning an old spreadsheet, this tool lets you capture business details, line items, and payment terms in minutes—no account or downloads required.
It keeps totals accurate by combining taxable and non-taxable line items, discounts, and shipping fees. You can preview everything in a print-ready layout and send yourself a copy instantly.
Flexible invoice template
Ship To and Bill To blocks keep logistics clear when distribution centers differ from billing contacts.
PO numbers and tax IDs surface near the header so your buyers can match accounting records quickly.
Notes and payment terms appear beneath the totals, with an optional thank-you message for a personal touch.
Invoice math: how totals are calculated
The calculator multiplies quantity × unit price for each line item, sums taxable and non-taxable subtotals separately, then applies discounts before calculating tax. Shipping and manual adjustments are added at the end so your grand total reflects every charge.
Subtotal = sum of all line item totals before tax or discounts.
Discount applies to the subtotal. Percentage discounts split proportionally across taxable and non-taxable items.
Tax = (taxable subtotal − taxable share of discount) × tax rate.
Grand total = subtotal − discount + tax + shipping + adjustments.