What to Include on an Invoice (Checklist + Example)
An invoice has one job: get you paid without a back-and-forth. Most payment delays aren't about money. They happen because something is missing: a PO number, a due date, or a line the client's accounts team can't match to the work. Use this checklist and that problem mostly disappears.
The 12-point invoice checklist
These twelve details belong on every invoice you send, whether you're a freelance writer or a plumbing company.
- Your business nameOr your legal name if you're a sole proprietor
- Your contact detailsAddress, email and phone
- The word "Invoice"So it isn't mistaken for a quote
- A unique invoice numberSequential, never reused
- Issue dateThe day you send it
- Due date or payment termsNet 15, Net 30, Due on receipt
- Client name and addressTheir legal business name
- Itemized products or servicesDescription, quantity, rate, amount
- SubtotalBefore tax and discounts
- Tax and discountsOnly if they apply
- Total amount dueMinus any deposit already paid
- How to pay youACH, check, card, PayPal
You don't need to memorize the list. The free invoice creator has a field for each one, and our step-by-step invoice guide shows a filled-in example.
Required details, explained
Your details and the client's details
Use the client's legal business name, not a nickname or the name of the person you work with. "Harbor Coffee Co." gets processed; "Maria at the coffee place" gets emailed back with questions. Your own details tell the client exactly who to pay, so keep them identical on every invoice.
Invoice number
The invoice number is how both of you refer to this bill later, from payment references to tax records. Make it unique and sequential, for example INV-2026-001, INV-2026-002. Our invoice number generator can set up a format in seconds.
Dates and payment terms
Show both the issue date and the due date. Writing only "Net 30" makes the client do the math; writing "Due December 10, 2026" removes any doubt.
Itemized lines
Each line needs a description, a quantity (or hours), a rate and an amount. Itemizing does two things: it shows the value of your work, and it gives the client an easy way to approve most of the invoice even if they question one line.
Totals and how to pay
Show the subtotal, then any discount and tax, then the total. If the client paid a deposit, subtract it and label the final figure "Balance due." Finish with exactly how to pay: bank details for ACH, a mailing address for checks, or a payment link.
Optional details that speed up payment
| Detail | When to add it |
|---|---|
| Purchase order (PO) number | Whenever the client gives you one. Many companies can't pay without it. |
| Your logo | Always helpful; it makes the invoice easy to spot in a crowded inbox. |
| Late-fee policy | If you've agreed one in your contract, for example 1.5% per month. |
| Early-payment discount | "2/10 Net 30" means 2% off if paid within 10 days. |
| Project or job reference | When a client runs several projects with you at once. |
| Thank-you note | One line. It costs nothing and clients notice. |
Extra details by type of business
- Freelancers and consultants: hours worked per task, the hourly rate and the date range covered.
- Contractors and trades: labor and materials on separate lines, the job site address and any change orders.
- Product sellers: SKU or item code, unit price, shipping cost and the ship-to address if it differs from billing.
- International clients: the currency (USD, EUR, GBP) next to every amount, and wire or international payment details.
What not to put on an invoice
- Your Social Security number. If a client needs your taxpayer ID for a 1099, they'll ask for a W-9 form instead. Many freelancers use an EIN, which is free from the IRS, to avoid sharing their SSN.
- Full card or account passwords. Bank account and routing numbers for ACH are normal; anything that lets someone log in is not.
- Surprises. New charges that weren't agreed in advance belong in a conversation first, not on the invoice.
Keep a copy of every invoice
Save a PDF of each invoice you send and note when it was paid. The IRS explains how long to keep business records on its record-keeping page; for many small businesses the answer is at least three years. A simple folder per year, named by invoice number, is enough.
Frequently asked questions
What is the minimum information an invoice needs?
At minimum: your name and contact details, the client's name, a unique invoice number, the date, a description of what you provided, the amount due and how to pay.
Do I need to put my tax ID on an invoice?
Usually not in the US. Clients who need your taxpayer ID for a 1099 will ask for a W-9 form. Some businesses add their EIN to invoices by choice.
Should an invoice include the client's email?
It's helpful but not required. The client's legal name and billing address matter more for their records.
What is the difference between an invoice and a receipt?
An invoice asks for payment before it's made. A receipt confirms that a payment was received. Marking an invoice as PAID turns it into a payment record.
This article is general information, not tax or legal advice. Rules differ by state and country; check with a qualified professional for your situation.