How the totals are calculated
- Line amounts. Each line is
quantity × rate, rounded half up to the cent. Quantities can be fractional (7.5 hours is fine). - Subtotal. The sum of the rounded line amounts.
- Discount first. A percentage discount is
subtotal × rate ÷ 100, rounded half up to the cent; a flat discount is used as entered (capped at the subtotal, so the invoice can never go negative). The discounted subtotal issubtotal − discount. - Then tax. Tax applies to the discounted subtotal:
tax = (subtotal − discount) × tax rate ÷ 100, rounded half up to the cent. This is the ordering most US sales-tax rules and accounting packages use — the discount reduces the taxable amount. - Total due.
(subtotal − discount) + tax. Every displayed figure is rounded half up to the cent at its own step, so the printed rows always sum exactly to the printed total.
Worked example: 10 × $85 + 3 × $120 = $1,210.00 subtotal; a 10% discount takes it to $1,089.00; 8.25% tax adds $89.84 (1,089 × 0.0825 = 89.8425, rounded); total $1,178.84.
Sending a contract along with this invoice? Try the companion tool: check your contract's readability. More free tools at the Reckix index.
Frequently asked questions
Is this invoice generator really free?
Yes. There is no signup, no trial, no watermark, and no limit on how many invoices you create. The page is supported by advertising, which never appears on the printed invoice itself.
Where is my invoice data stored?
Nowhere. Everything you type stays in your browser — there is no server that receives or stores it. The "copy link" button encodes the whole invoice into the link itself, so the only copy that exists is the one in your browser and in any link you save or share.
Can I save an invoice and come back to it later?
Yes — use "Copy link to this invoice" and bookmark or save that link. All fields, including every line item, are encoded in the URL, so opening the link restores the invoice exactly. To keep a permanent record, use Print / Save as PDF.
What should an invoice include?
A professional invoice includes: your business name and contact details, the client's name and details, a unique invoice number, the issue date and a due date (or payment terms like Net 30), an itemized list of services with quantities and rates, the subtotal, any discount and tax, the total due, and payment instructions.
Is an invoice generated here a legal document?
An invoice is a formal request for payment and a normal business record, but it is not a contract by itself — the obligation to pay comes from your underlying agreement with the client. Requirements (such as tax IDs or VAT lines) vary by jurisdiction. This tool is not legal or tax advice.
This tool produces a general-purpose invoice layout and is not legal or tax advice. Invoice requirements (tax IDs, VAT/GST lines, e-invoicing mandates) vary by jurisdiction — confirm yours with a qualified accountant or attorney. No liability is accepted for how generated invoices are used.