How to Invoice as a Contractor in the US (2026 Guide)

Getting paid on time is one of the biggest challenges of running a contracting business — and it often comes down to the invoice. A vague, late, or incomplete invoice gives clients a reason to delay payment, creates confusion at tax time, and makes you look less professional than the licensed contractor you are.

Whether you are finishing a kitchen remodel, invoicing a general contractor for a subcontracted rough-in, or billing a homeowner for a one-day repair, a clear professional invoice protects you legally, supports clean books for tax season, and gets money into your account faster. Clients take you more seriously when paperwork matches the quality of your work — and the IRS and your accountant need consistent records when it is time to file.

This guide walks you through exactly what to put on a US contractor invoice, how sales tax works, and how to set payment terms that actually get you paid.

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What to Include on a US Contractor Invoice

Your invoice should be a proper business document, not a text message with a total. If you ever dispute a payment or face an audit, the invoice is your paper trail. Include every item below:

1. Your name or business name and address — sole proprietor, LLC, or corporation name, plus your business address.
2. Contractor license number — if your state or trade requires licensing, include your license number. It builds trust and is often expected on commercial work.
3. Client name and address — the person or company paying the bill.
4. Unique invoice number — sequential numbering (e.g. INV-2026-0042). Never reuse numbers.
5. Invoice date — the date you issue the invoice.
6. Due date — when payment is expected (e.g. 30 days from invoice date for Net 30).
7. Line items — each task or material with a clear description and cost. Separate labor and materials where practical.
8. Subtotal — total before sales tax.
9. Sales tax line — if tax applies in your state and situation, show the rate and amount as a separate line. Rates vary by state and sometimes by city or county — confirm yours with your state's revenue department or accountant.
10. Total amount due — subtotal plus applicable sales tax.
11. Payment instructions — how to pay you: bank transfer (ACH), check payable to your business name, or a link for online card payment.

Tips that prevent disputes:

• Be specific on line items. Write "Install 40 sq ft ceramic floor tile, including thinset and grout" — not "tile work."
• Separate labor and materials when your state taxes them differently or when a commercial client needs a cost breakdown.
• Match the quote. If you sent a written quote, the invoice should align with it so the client does not question unexpected charges.
• Use one invoice per billing event. A deposit invoice, a progress invoice, and a final invoice each get their own number and due date.

Example layout:

INVOICE #INV-2026-0042          Date: June 1, 2026
Due: July 1, 2026 (Net 30)

From: Smith Contracting LLC
      123 Main St, Austin, TX 78701
      License: #12345678

Bill To: Jane Homeowner
         456 Oak Ave, Austin, TX 78702

Description                          Amount
─────────────────────────────────────────────
Bathroom tile installation (labor)   $1,200.00
Tile and grout materials               $380.00
─────────────────────────────────────────────
Subtotal                             $1,580.00
Sales tax (rate per your state)         $XX.00
─────────────────────────────────────────────
TOTAL DUE                            $X,XXX.00

Payment: ACH — routing/account on file
         Or pay online: [link]

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Sales Tax for US Contractors

Unlike a single national VAT system, sales tax in the United States is set at the state level — and rules for contractors vary widely.

Some states tax labor on construction and repair work. Others tax only materials, not labor. Some exempt certain residential work or specific trades. Rates also differ by state, county, and city. If you work across state lines, the rules for where tax is owed matter, not just where your business is registered.

What to do: Before you quote or invoice a job, confirm how sales tax applies in the state where the work is performed. Your state's Department of Revenue (or equivalent) publishes contractor guidance. A local accountant who works with trades businesses is worth the cost if you are unsure — charging the wrong amount can mean paying out of pocket or facing penalties.

Do not copy a rate from another state or a generic online list. Show tax as a separate line on the invoice when it applies, and keep records of taxable vs non-taxable items if your state requires a split.

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Payment Terms

Net 30 is the standard in the US — payment due 30 calendar days after the invoice date. It is what many commercial clients and property managers expect.

For smaller residential jobs, Net 15 or due on receipt is common. Larger projects often use a deposit before work starts and a final invoice on completion — but each invoice still needs its own number, amount, and due date.

State your terms in plain language on every invoice: "Payment due within 30 days of invoice date." Send the invoice the same day you finish the work whenever possible.

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How HomiWorks Helps US Contractors

HomiWorks is built for contractors who work from the job site, not a desk. Here is how it maps to the workflow above:

• Set your sales tax rate once in account settings — enter the rate and label your state uses (e.g. "Sales tax"). HomiWorks pre-fills it on every quote and invoice so you are not retyping numbers between jobs.
• Generate a quote from a job site photo in about 60 seconds — snap a photo, describe the work, and send a professional quote before you leave the driveway.
• Automatic payment chasing at 7 and 14 days overdue — polite reminders go out without you drafting awkward follow-up texts after a long day on site.
• Send invoices via WhatsApp or email — use the channel your client actually reads.

You stay focused on the work; the admin runs in the background.

Try HomiWorks free for 7 days →

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Final Thoughts

A professional contractor invoice is how you get paid, stay organized, and look credible next to larger companies. Include every key field, number every invoice, describe the work specifically, handle sales tax based on your state's rules, and send the invoice as soon as the work is done — not at the end of the month when the job has faded from the client's mind.

If you want to skip the paperwork, HomiWorks handles quotes, invoices, sales tax defaults, and payment follow-ups from your phone.

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HomiWorks is the AI business tool built for contractors. Quote, invoice, and chase payments — all from your phone.