What should be on a contractor invoice?

An invoice number, invoice date and specific due date, your business details and license number, the client's details, itemised labour and materials with quantities and prices, subtotal, tax and total, payment terms, accepted payment methods with a payment link, and any deposit already paid. Clear line items and a concrete due date matter most for getting paid without disputes.

Do contractors need to put a license number on invoices?

In many states, licensed trade contractors are required to display their license number on invoices and contracts, and it signals professionalism everywhere. Check your state's rules, but including it is best practice on every invoice regardless.

Should a contractor itemise an invoice?

Yes. Breaking out labour and materials with quantities and prices shows the client exactly what they are paying for, which reduces questions and disputes and gets invoices paid faster. A single vague line like "work performed" is the most common cause of a client stalling on payment.

What to Include on a Contractor Invoice

The complete checklist

Every professional contractor invoice should have these elements. Missing any of the first nine creates either a payment delay or a dispute.

"Invoice" and a unique number — e.g. INV-2026-0042. Sequential numbering keeps your records clean and is expected for tax purposes.
Invoice date and due date — a specific calendar due date, not "Net 30".
Your business details — name, address, phone, email.
Your license number — required in many states for trade work and a mark of professionalism everywhere.
Client details — name and the job/billing address.
Itemised line items — labour and materials listed separately with quantity, unit price, and line total.
Subtotal, tax, and total — show tax as its own line so the client can see how the total is built.
Payment terms — due date, late-fee policy if any, and deposit already paid.
Payment methods — accepted methods and, ideally, a direct payment link.
Deposit / balance — if a deposit was paid, show it and the remaining balance clearly.
A short thank-you or note — optional, but it reads as professional and human.

The elements contractors most often miss

Three items get left off most often, and each one costs you.

A specific due date. "Net 30" or "payment on completion" is vague. A homeowner does not run an accounts-payable cycle; they need a date. "Due by July 9, 2026" gets paid faster than any open-ended term. More on this in Contract Invoice Payment Terms.

Itemised line items. An invoice that just says "electrical work — $1,400" invites the client to question it. Breaking out labour and materials shows the work was real and the price is fair, which heads off disputes before they start.

A payment link. Not strictly required, but its absence is why invoices sit. A link turns a multi-step bank transfer into a 30-second card payment.

You do not need legal language or a designer. You need every element present, clearly laid out, sent immediately. Build one free with the invoice generator.

Getting it right every time

The hard part is not knowing what goes on the invoice — it is producing one with all eleven elements, correctly, in under a minute, on a phone, the day the job is done. Done by hand, it is tedious enough that it gets put off.

Fieldpaid builds a complete, correctly-formatted invoice from your quote in one tap — license number, itemised lines pulled from your QuickBooks item list, tax, due date, and a Stripe payment link already attached — then pushes it to QuickBooks automatically. Every invoice has every element, every time, without a checklist.

What to Include on a Contractor Invoice (Complete Checklist)