Invoicing for electrical work

Two businesses, one invoice pad

Reactive work — a dead circuit, a tripping breaker, a light that hums — is sold as time and invoiced within hours of finishing. Installation work is sold as a scope, quoted before it starts, and invoiced in stages that can be a month apart. Trying to bill both the same way is where most of the friction comes from.

The useful test: if you knew the price before you arrived, it belongs on a quote and bills against that quote. If you did not, it bills as labor and parts, and the invoice has to explain the time.

Fault-finding is sold as time, not as a result

The awkward invoice in this trade is the one for a job that took ten minutes. A customer who watched you reset something and tighten a terminal is being asked to pay for the twenty years that told you which terminal.

Naming the work is what makes that legible. “Fault-finding — intermittent trip on kitchen circuit: tested RCD, isolated damaged cable behind the units, terminated and made good” is a line that justifies itself. “Labor 1 hr” is a line that invites a conversation about how long you were there.

A minimum charge for the first hour is normal and worth saying on the phone, not on the invoice. If the fault turns out to need parts and a return, invoice the diagnosis now and quote the repair — the customer has had value either way, and splitting the two documents keeps the price of the repair a decision rather than a discovery.

Installation is priced per device

Adding outlets, switches, fixtures, smoke alarms or circuits is repetitive work, and nearly everyone ends up pricing it per device: so much per outlet on an existing circuit, so much for a new circuit, so much for a fixture the customer supplies versus one you supply. It quotes fast, and it invoices without argument because the customer can count the things on the wall.

Two details are worth putting on the document. Say which fixtures were customer supplied, because a fitting you did not buy is one you did not warrant. And when a device turns out to need more than the standard price covers — a run through a finished ceiling, a chased wall — that is a separate line agreed on the day, not a quietly larger number.

Big jobs bill in stages

A rewire or a panel upgrade is weeks of work with a materials bill you pay up front, so it bills like a small construction job rather than like a service call. The normal shape is a deposit covering materials at the start, a payment at rough-in once the cable is in and before the walls close, and the balance at completion — often after the inspection has passed.

Each of those is its own invoice, referencing the estimate, and each one should show the deposit still being carried so the customer can see the arithmetic working out. The pattern is the same one contractor progress invoices use, and the template page covers how to lay the numbers out.

New construction pays on somebody else’s cycle

Subcontracting to a builder is a different payment world from householders. You bill against a schedule of values or a fixed subcontract, in the format their office wants, and you are paid on their cycle — sometimes after they have been paid themselves. None of that is changed by the term you write on the invoice, so the leverage is in the billing schedule you agree at the start. Payment terms explained covers what the standard terms actually commit anyone to.

Service work is the opposite: a homeowner can pay today and generally prefers to. Ask while you are packing up.

What Invoice Tiger covers

• Saved services for your hourly and minimum charges and your per-device prices, so an installation invoice is assembled rather than typed.
• Estimates with independent numbering, which is what staged work needs — the estimate keeps its own reference for the length of the job.
• A deposit field that shows money already taken and produces the balance due, so the customer never has to reconstruct it.
• Notes long enough for the estimate reference, the inspection date and the warranty wording you use.
• Every past document searchable by customer or number, which is how you answer “what did you charge for the garage circuits” without going home.

What it does not do

There is no job diary, no dispatch, no materials inventory, no certificate or test-result generation, and nothing that files a permit for you. It makes the billing documents and stops there — the certification software you already use for test results is a different tool, and this does not replace it.

It also takes no part in the payment itself. The instructions on the invoice are your own, and nothing is deducted from what your customer pays you. For the smaller, faster end of this kind of work, plumbing invoices deal with the same call-out shape from a slightly different angle.