What to include on an invoice
An invoice that is missing a field is an invoice that gets queried, delayed, or ignored. This is the complete checklist — the parts that are essential, the ones that get you paid faster, and the tax details some businesses are legally required to show.
The essentials — every invoice needs these
- The word "Invoice." Clearly labeled, so it is routed correctly and not mistaken for a quote or a receipt.
- Your business identity. Name, address, email, phone, and logo if you have one. This establishes who is owed and that you are a real operation.
- The client's billing details. The legal name and address that should appear under "Bill to" — which may differ from your day-to-day contact.
- A unique invoice number. Sequential, never reused. See how to number invoices.
- Invoice date and due date. When it was issued and when payment is expected. A specific due date, not "on receipt."
- Itemized line items. One row per item: description, quantity, unit rate, line total.
- Subtotal, tax, and total. The math shown, with tax on its own line, ending in a clear total due.
- Payment terms and methods. The terms (e.g. Net 14) and exactly how to pay you.
The details that get you paid faster
These are not always mandatory, but each one removes a reason for payment to stall:
- A purchase-order (PO) number when the client uses them — for many companies, no PO means no payment.
- Specific line-item descriptions that survive a finance review ("Homepage build — 12 hrs" not "web work").
- The payment details right on the invoice — bank info, a link, or a pay-by-QR code — so no one has to email to ask.
- A short thank-you or note. A civil tone measurably helps; people prioritize invoices from people they like working with.
- Your late-payment policy stated in the terms, so any fee is pre-agreed rather than a surprise.
Tax details some businesses must show
If you are registered for sales tax, GST, or VAT, your invoices usually must carry additional information — your tax registration number, the tax rate and amount broken out, and sometimes specific wording or the client's tax number for cross-border sales. The requirements differ significantly by country and by whether you are registered, so this is the part of the checklist to confirm against your local rules rather than assume.
When in doubt, itemize and label. An invoice that shows its work — clear lines, a broken-out tax figure, a stated total — is both easier to pay and easier to defend if anyone ever asks. Over-clarity has no downside.
The checklist, working for you automatically
A good generator includes these fields by design, so "what to include" stops being something you have to remember. Billotter lays out every field above, does the subtotal-tax-total math, numbers the invoice, and exports a clean PDF — with a pre-filled template for common trades if you want a running start.
Frequently asked
What information is required on an invoice?
At minimum: the word Invoice, your business name and contact details, the client's billing details, a unique invoice number, the issue and due dates, itemized line items with quantities and rates, the subtotal and total, tax if applicable, and payment terms and methods. Registered businesses typically must also show a tax number.
Do I have to include a tax number on my invoice?
It depends on whether you are registered for sales tax, GST, or VAT and where you operate. Registered businesses usually must show their tax registration number and break out the tax amount. If you are not registered, you generally do not — but confirm the rules in your jurisdiction.
What makes an invoice get paid faster?
Specific line-item descriptions, a clear due date, any required PO number, payment details right on the invoice, and a stated late-payment policy. Removing every reason for a query and every step needed to pay is what shortens the time to payment.
Does an invoice need a due date?
Yes — practically speaking, an invoice without a due date invites late payment because there is no deadline to miss. State a specific date or a clear term like Net 14 so both sides know exactly when payment is expected.
Keep reading
- How to write an invoiceThe 8 parts, step by step, with an example
- How to number invoicesFormats, sequences, and what to avoid
- Invoice payment terms explainedNet 30, Net 15, Due on Receipt & how to choose
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