Most contractors lose money on invoices two ways: they send them late, and they send them vague. A vague invoice (“Flooring work — $5,200”) gives a slow-paying client every excuse to question the number. An itemized invoice with clear terms gets paid because there’s nothing to argue about. Here’s exactly what to put on it.

The 9 line items every contractor invoice needs

Leave any of these off and you give the client a reason to delay:

• Your business name, address, phone, and license number. In states like Florida, California, and Arizona, your license number on the invoice isn’t optional — it’s expected, and on permitted work it protects your lien rights.
• The client’s name and the job address (which is often different from their billing address).
• A unique invoice number — e.g., 2026-0142. Sequential numbers make your bookkeeping and taxes far cleaner at year end.
• Issue date and due date. “Due on receipt” or a real calendar date — never just “Net 30” with no date.
• Itemized scope, with labor and materials on separate lines. This is the single biggest thing that gets invoices paid without a fight.
• Subtotal.
• Sales tax, where your state taxes the labor or materials (this varies a lot by state — more below).
• Total due, in bold, at the bottom.
• Payment terms and methods — how they pay, by when, and the late fee if they don’t.

A real invoice, line by line (a $5,200 LVP job)

Here’s how a 1,000-square-foot luxury-vinyl-plank install actually breaks down on the invoice — the level of detail that ends payment disputes before they start:

On a material-heavy job like this, you’d typically invoice a deposit of 30–50% at signing ($1,560–$2,600 here) and the balance due on completion — not 30 days later. Splitting labor from materials also means if the client disputes anything, it’s a single $500 line, not the whole $5,200.

Net terms: why “due on receipt” beats “Net 30”

Payment terms set how fast you get paid. A “Net 30” invoice realistically lands in your account in 30–45 days. The same invoice marked due on receipt with a card or ACH link attached often clears in 2–5 days. For anything over ~$8,000, switch to progress billing — bill at milestones (deposit, rough-in, completion) so you’re never floating the whole job.

Payment methods and the fees that eat your margin

Cards (Stripe, Square, PayPal) cost about 2.9% + $0.30 per transaction — on a $5,200 invoice that’s roughly $151 gone. ACH/bank transfer usually runs ~0.8% capped around $5, so it’s the cheapest way to take a big balance. Two clean options: offer a 2% discount for cash/check/ACH, or add a card surcharge where your state allows it. Either way, decide before you send the invoice, not after.

Late fees and follow-up that actually works

A late fee only sticks if it’s written on the invoice and in your contract — commonly 1–1.5% per month on the unpaid balance (check your state’s cap). Then work a simple cadence: a friendly reminder the day it’s due, a firmer note at +7 days that applies the late fee, and at +15 days a notice referencing your lien rights. Most invoices get paid at the +7 nudge — but only if the terms were on the invoice to begin with. (This is general information, not legal advice — your state’s rules govern.)

Frequently asked questions