Writing an invoice that gets paid

General business guidance, not tax or legal advice. Sales tax rules, license-disclosure requirements and contract rules are set state by state and sometimes by city. Confirm anything specific with your state revenue department, your licensing board, or a CPA who works with contractors.

The deck was finished on a Thursday. The invoice went out that night as a text: "All done — $4,200, Zelle or a check is fine." Six weeks later the homeowner is still "waiting on my wife to look at it," and there is nothing to point at. No date. No breakdown. Nothing that says the payment is late, because nothing ever said when it was due.

For ordinary private work — a homeowner, a property manager, a general contractor — no federal law tells a U.S. contractor what an invoice must contain. (Public work is different: federal contracts define a "proper invoice" in the Prompt Payment clause, FAR 52.232-25, and most states have their own prompt-payment rules for public projects. If you are billing a government body, the contract tells you the required fields.) On private work that absence of rules sounds like freedom and works like a trap: a thin invoice is legal, so nobody stops you sending one, and the cost shows up as silence. A good invoice does two things — it says exactly what is owed, and it removes every reason to put the decision off a week.

What the page has to carry

Names and figures below are invented. Use the shape, not the numbers.

Ask your licensing board which documents must show a license number. For commercial work, keep a completed W-9 ready and use a stable invoice number; invoice numbering and records covers the system.

A finished invoice for a panel upgrade

INVOICE 2026-0184 Ridgeline Electric LLC · License EL-00000 · (555) 010-4180 · [email protected]

Bill to: Hale Property Group LLC, 900 Third Ave, Suite 210 Job: 214 Alder St — 200A service upgrade · PO 4471 Invoice date: August 24, 2026 · Terms: Net 15 · Due: September 8, 2026

Description	Qty	Unit	Rate	Amount
Labor — remove existing panel, install and terminate new service, transfer 22 circuits	12	hr	$95.00	$1,140.00
Materials — 200A load center, breakers, meter socket, conduit, grounding	1	lot	$760.00	$760.00
Electrical permit — city fee, billed at cost	1	ea	$185.00	$185.00

Subtotal: $2,085.00 Sales tax on materials, 6.5%: $49.40 Total: $2,134.40 Deposit paid 8/11, check #1902: −$600.00 Balance due: $1,534.40 by September 8, 2026

ACH: routing 000000000, account 0000000000. Checks payable to Ridgeline Electric LLC. Card payments carry a 2.9% processing fee, disclosed before you pay.

Three things make this hard to sit on. The descriptions say what was done, not what was "discussed." The deposit is subtracted on the page, so nobody does arithmetic to find the amount owed. And the due date is a calendar date, so the day it goes late is not an opinion.

The tax line charges materials only, at a made-up rate. That is one of several ways states treat work on real property, not a template — see below.

Do not copy that card-fee line either. Card-network rules and state law change; confirm the current rule with your processor before adding any surcharge.

Labor and materials on separate lines

Splitting them costs nothing and pays back in four places.

Tax. Many states tax tangible materials and treat installation labor on real property differently. Inside one lump sum, you cannot show how the tax was calculated, and neither can your bookkeeper.

Scrutiny. A customer who thinks $2,085 is high wants to know which half is high. Two lines let you answer. One line leaves you discounting your own labor to move at all.

Claims and pass-throughs. An adjuster may ask for material cost, while permits, dump fees, and inspection fees should say whether they are billed at cost.

Grouping materials as one "lot" line with the contents named, as above, is usually right for residential work — checkable, not a hardware-store receipt. Commercial and insurance work often wants more. What you should not do is use a different level of detail than the document the customer approved; the two get compared.

The sales tax line

Whether you charge sales tax, on what portion, and at what combined rate is state and often local law. If you collect it, show it as a separate line. If a customer claims an exemption, get the supporting document before invoicing. Your state revenue department is the authority; sales tax on materials vs. labor covers what to ask.

Three fields commercial invoices need and residential ones don't

The PO number. In many accounts-payable systems an invoice without a matching purchase order number is not rejected — it never enters the queue. Ask for the PO before you start, and print it by the invoice number.

The AP contact, not the site contact. The superintendent who watched you work does not cut checks. Get the billing email or vendor portal on day one, and copy the site contact rather than addressing them.

Your W-9 on file, with the name matching. Business customers report what they pay you on Form 1099-NEC — unless you are taxed as a corporation, which is generally exempt from that reporting, though plenty of AP departments ask for the W-9 anyway and are entitled to. Either way, if your W-9 says one entity name and your invoice says another, the mismatch stalls the payment and follows you into January. Getting paid on commercial jobs covers the rest, including retainage and lien waivers.

Avoid the easy delays

Reference signed change orders, show every payment already applied, send a readable document, and invoice promptly after the work. Which term to use and chasing a late invoice are separate decisions.

The invoice starts on the approved document

Almost everything on that panel-upgrade invoice existed before the work did. The customer entity, the scope lines, the quantities, the material split, the deposit — all of it was on the estimate they approved. Retyping it from memory is how the two documents drift apart, and the drift is what customers argue with.

DoneQuote is where the estimate or quote gets built and approved, so those line items and that tax breakout are already written down and already agreed to by the time you bill. You copy them across instead of reconstructing them, and when someone questions a line, the approved version and its date sit next to the job.

An invoice that repeats a document the customer already said yes to is hard to argue with. That is most of the trick.