TL;DR: Put your C-10 license number, work dates, jobsite address, customer authorization, and a specific complaint, found, and done description on every California electrical invoice. On a service and repair job covered by Business and Professions Code section 7159.10, issue the invoice on site and collect only after the work is complete.
Your California electrical invoice should identify the job before it prices the job
On a California service call, the invoice is often the only document the customer keeps. Make it identify the work without forcing anyone to guess.
Your business block should show your business name, address, phone number, and C-10 license number. Business and Professions Code section 7030.5 requires a licensed contractor to include the license number in construction contracts, subcontracts, calls for bid, and prescribed advertising. It does not name invoices. On a residential service and repair job, however, the signed paper stating the price is usually the same sheet that becomes the invoice. Put the license number on it.
The customer block should name the person who authorized the work, the service address, and a separate billing address if it differs. On a rental, the tenant may call while the owner pays. Name the party who approved the work. See who authorizes work on a tenant call.
Add the invoice number, invoice date, and the date or dates the work was performed. Use the jobsite address, not only a billing address. The work dates and jobsite address matter if you later need to protect your lien rights.
The first invoice line should use the customer’s complaint
“Electrical repair” is not a useful description. “Troubleshoot” is not a useful description either.
Write each item in three parts:
- The complaint in the customer’s words.
- What you found.
- What you did.
Name the location and circuit. Say kitchen counter circuit, garage subpanel, or the actual location involved.
Wirewoman’s job summary arrives by SMS within 30 seconds after the call ends. It carries the caller’s name, address, and problem in the caller’s own words, such as “half the kitchen is dead” or “the breaker keeps tripping.” That phrasing belongs at the start of the invoice description. Restate the complaint, then state what you found and what you did.
An invoice that opens with the customer’s own complaint is much harder to argue with than one that opens with a part number. The description connects the charge to the call, the diagnosis, and the completed work.
List materials by item and count. Put fixtures on their own lines. Show labor by hours and rate, or show the flat price, matching the estimate. See what electricians charge by the hour, the day, and the call-out.
If you charge a diagnostic or service fee, state the single service charge the customer was told about on the phone. See whether to charge for an estimate.
The invoice must show who asked for the visit
Wirewoman answers in 2 seconds, 24 hours a day. She collects the address, issue, urgency, and preferred time, then logs every call to a dashboard with the call time and caller’s number.
That log records when the customer first asked for the work and what the customer asked for. That matters when someone later says they never authorized the visit.
Sparking, smoke, a burning smell, or full power loss ring your cell under the escalation rules you set. Wirewoman does not quote prices and does not write the invoice. The numbers on the invoice are yours.
The invoice should still name the person who authorized the work. The call record supports that authorization. It does not replace the invoice or the signed contract.
A progress invoice cannot bill the next phase early
For a home improvement contract, Business and Professions Code section 7159 applies when the aggregate contract price in one or more improvement contracts, including labor, services, and materials, exceeds $500.
The contract must contain the contractor’s name, business address, and license number. It must also contain this language:
THE DOWNPAYMENT MAY NOT EXCEED $1,000 OR 10 PERCENT OF THE CONTRACT PRICE, WHICHEVER IS LESS.
Each progress payment must be stated in dollars and cents and specifically reference the work or services to be performed and the materials and equipment to be supplied.
The contract must also contain this language:
IT IS AGAINST THE LAW FOR A CONTRACTOR TO COLLECT PAYMENT FOR WORK NOT YET COMPLETED, OR FOR MATERIALS NOT YET DELIVERED. HOWEVER, A CONTRACTOR MAY REQUIRE A DOWNPAYMENT.
That makes the progress invoice more than a balance request. It must match a progress payment written into the contract. It must bill only work actually done and materials actually delivered. An invoice for the next phase before that phase is complete is the thing the statute calls against the law.
On a larger job, send the progress invoice the day the phase is complete. Name the phase exactly as the contract’s schedule of progress payments names it. Show the amount in dollars and cents.
A written change order becomes part of the contract only if it is signed by both parties before any work covered by the change order starts. Reference each change order by number and date on the invoice. See an estimate that survives a change order.
Small service calls have a different payment rule
Business and Professions Code section 7159.10 provides a lighter service and repair contract lane when all of these conditions are met:
- The contract amount is $750 or less.
- The buyer contacted you to request the work.
- You do not sell goods or services beyond what is reasonably necessary to address the particular problem that caused the call.
- No payment is due or accepted until the work is completed.
Before work starts, you must give the buyer a copy of the contract signed and dated by the buyer and by you or your representative. A fixed price contract carries the heading “Contract Price” followed by the dollar amount.
For these jobs, the invoice is issued and paid at completion, on site. There is no deposit and no progress billing. Write the invoice on site, get it signed, and collect when the work is complete.
The invoice date can start the private works payment clock
Civil Code section 8800 says that, unless the owner and direct contractor agree otherwise in writing, the owner must pay a direct contractor within 30 days after notice demanding payment under the contract is given for a progress payment with no good faith dispute.
If there is a good faith dispute, the owner may withhold no more than 150 percent of the disputed amount. An owner who violates the section owes a penalty of 2 percent per month on the amount wrongfully withheld, in place of any interest otherwise due. In a collection action, the prevailing party gets costs and a reasonable attorney’s fee.
The invoice, or the demand sent with it, is the notice demanding payment. Give it a date. Identify the contract phase it bills. State the amount in dollars and cents. Show the balance due and the due date.
Your totals should include the subtotal, tax where it applies, total, payments already received, deposit, balance due, and accepted payment methods.
Fixtures and sales tax need separate lines
Under CDTFA Regulation 1521, you are generally the consumer of materials such as wire and conduit. Tax is paid at the supply house and is not recharged to the customer. You are generally the retailer of fixtures such as lighting fixtures, transformers, and switchgear.
If you add a sales tax line calculated on your marked-up materials price, CDTFA treats you as the retailer of those materials. See sales tax on an electrical job in California.
Keep fixtures on their own invoice lines. Do not bury them in a general materials line.
The jobsite address and work dates preserve lien information
A direct contractor has 90 days after completion to record a mechanics lien, or 60 days if the owner records a notice of completion. See mechanics lien deadlines.
Carry the owner’s name, jobsite address, and dates work was performed on the invoice. Those are facts a lien needs later. A billing address alone does not identify the property where the work was done.
When an owner pays for a portion of home improvement work satisfactorily, Business and Professions Code section 7159(c)(4) requires the contractor to furnish a full and unconditional release from any potential lien claimant claim for that portion.
Commercial retention belongs on its own line
SB 61 added Civil Code section 8811, effective January 1, 2026. For contracts entered into on or after January 1, 2026, retention on a private work of improvement is capped at 5 percent at every tier. The cap does not apply to non-mixed-use residential projects of four stories or less. See the 5 percent retention cap.
On a commercial job, show retention withheld as its own line. Show the balance due separately from the retention still owed. Do not let those two amounts look like one unpaid balance.
Change the next invoice before you send it
Put your license number on it. Add the work dates and jobsite address. Name the person who authorized the work. Describe every item with the complaint, what you found, and what you did, including the location and circuit.
List fixtures separately. Show deposits and progress payments only as the contract states them. Reference signed change orders by number and date. On service and repair jobs, write the invoice on site, get it signed, and collect at completion. On larger jobs, send it the day the named contract phase is complete.
