Electrician Invoice Template UK: What Gets You Paid On Time

TL;DR: An electrician's invoice is a payment instruction, not a receipt you hand over at the end. On a board change or a rewire it has to spell out the deposit, the materials and the certificate position before you start, or the final payment drifts. This guide walks a UK electrician through the lines that actually move money, with real numbers, then points at the records that keep the whole job's cash trail straight.

2026/27 simplified mileage rate: For self-employed simplified expenses, HMRC's rate for cars and goods vehicles is 55p per business mile for the first 10,000 miles and 25p per business mile after that. The 55p rate applies retrospectively from 6 April 2026. Check GOV.UK simplified vehicle expenses before relying on the figures.

Most electrical jobs are not paid late because the customer is difficult. They are paid late because the invoice only appears at the end, asks for one lump sum, and never matched what was agreed when the quote was accepted.

A consumer unit change, a rewire, an EV charger install: these are jobs with materials to buy and stages to bill. If your invoice does not reflect that, you are asking to be paid in full on trust, after the power is back on, by a customer who already has what they wanted.

Strip away the layout and an invoice does three things, only one of which is about looking tidy.

• It tells the customer exactly what to pay and by when, with no maths left to them.
• It matches the stages and deposit you agreed at quote, so nothing looks like a surprise.
• It creates the paper trail your records and your accountant need at year end.

Get those right and the design barely matters. Get them wrong and a smart PDF still earns you a phone call three weeks later querying the total.

These three are where most electrical payment disputes start, and most of them trace back to something being verbal.

The deposit. On a job needing a consumer unit, cable and accessories, asking for nothing up front means you fund the wholesaler bill yourself. A deposit invoice issued when the job is booked fixes that. State it as a clear figure and what it covers ("deposit against materials"), not a vague "to secure the booking".

Materials. Cable and accessory prices move. If you quoted in spring and fit in summer, the price may have changed. Handle it honestly with a line on the quote and invoice: "materials charged at cost; figure reflects supplier pricing at point of order." Said up front it reads as fair; sprung after, it reads as a markup.

The certificate position. Your customer often wants the Electrical Installation Certificate or the EICR before they release the final payment, and that is reasonable. Say on the invoice when the certificate is issued relative to payment, so the final stage does not stall over a document neither of you pinned down.

Take a domestic rewire quoted at £4,500. Here is how the money lands if the invoicing is staged properly:

1. Deposit on booking: £1,350 (30%), covering first-fix materials. Paid before you order cable.
2. Interim at first-fix: £1,800 (40%), invoiced once the cabling is in and before plastering.
3. Final on completion and certification: £1,350 (30%), due when the job is tested, signed off and the certificate issued.

Compare that to one £4,500 invoice at the end. Staged, you have £3,150 in the bank before the final payment is due, and your exposure on the last stage is £1,350, not the whole job. The customer pays the same total; the risk sits in a different place. For a single socket or a fault-find, that structure is overkill, so match it to the job: a small job is one clean invoice, a rewire is three.

An invoice requests payment; expense and mileage records support later review. For 2026/27, HMRC's simplified rate is 55p for the first 10,000 eligible business miles and 25p thereafter. Eligible costs may reduce taxable profit where the rules are met and adequate records are retained; the form does not decide eligibility.

This is where invoices, receipts and trackers become one system. A structured electrician financial forms bundle (P07 Financial Forms Bundle Standard, £11.99) gives you the matching set: 14 forms covering invoice and receipt templates, a mileage log, an expense tracker, an income tracker and a profit-and-loss summary, all as print-ready PDFs with a fillable header, so you add your business name and complete the rest by hand.

A generic Word invoice is fine for your first job. You have outgrown it when you are retyping the same details every time, a staged job needs three linked invoices you track in your head, or your year-end records are a folder of one-offs with no running total.

At that point the invoice is only half the problem. The quote that set the stages, the deposit terms, the certificate note: those live in your electrician business document set (P01 Business Documents Standard, £11.99), 17 forms covering the client-facing paperwork from quote to sign-off, in the same plain style. Our electrician business documents checklist walks through which ones a domestic job actually asks for.

None of this matters if the number was too low to begin with. If your figures feel like guesswork, a pricing calculator for electricians (P05 Pricing Calculator Premium, £14.99) is an 8-sheet Excel workbook that costs in your van, insurance, dead time and target margin. Our guide on how much an electrician should charge walks the logic through, so every staged invoice afterwards is built on a number you can defend.

1. Header — business name, address, contact, scheme registration and UTR if shown.
2. Stage and reference — "Deposit", "Interim" or "Final", plus the quote number.
3. Line items — labour, materials at cost, each on its own line.
4. Agreed terms — deposit covered, materials-at-cost note, certificate position.
5. Total due and date — one figure, one date, your bank details.
6. A short note — "Payment due within 14 days of invoice date."

Sort the stages first, put them on the invoice second, and let the template be the easy part. The layout can be plain; the clarity is what gets it paid.

This article is general guidance, not tax advice or legal advice, written for UK electricians. Tax thresholds and mileage rates change, so verify current figures on GOV.UK before relying on them.