Fixed quote vs estimate on electrical work
For a defined job — a new consumer unit, an EV charger install, a known number of points — quote a fixed price. The scope is clear and the customer wants certainty.
For fault-finding or work in an older property where you cannot see the existing wiring, an estimate is more honest. An estimate is usually indicative rather than a fixed price, but local consumer law or the contract may limit how far the final price can move — label it clearly and state what could change the price (hidden faults, wiring that does not meet current standards).
Call-out, labour, materials — and certification as a line item
Build the quote so the customer sees each part:
- Call-out / minimum charge — your fee for attending, stated up front.
- Labour — hourly or by the job, by stage for a larger install.
- Materials — cable, accessories, the consumer unit, at cost plus markup.
- Testing, permits, and certification — list the required testing, permits, inspection, and compliance paperwork for your jurisdiction. For UK domestic work this may include EIC/EICR or Part P notification; elsewhere use your local certificate or permit wording. Show it as its own line, not buried in labour.
Listing certification separately makes clear that the price includes the compliance paperwork — a differentiator from a cheaper quote that omits it.
Validity, deposits, and acceptance
Put a validity window on the quote — 14 to 30 days. Cable and component prices (copper especially) move.
For larger installs, a materials deposit before you order is reasonable; for a standard call-out, payment on completion is normal. Additional work found on the job (a circuit that fails testing) should be priced in a written change order and approved before it proceeds.
Acceptance and signatures
A quote usually works as a commercial offer; if the client accepts it and the essential terms are clear, it will usually form the agreed price and scope, subject to local contract and consumer-law rules. Until acceptance, either side can walk away.
An e-signature or typed approval is usually enough for ordinary commercial jobs, provided local law and the contract do not require a specific form, witness, or wet-ink signature. Keep a dated record of the acceptance. For electrical work, acceptance should confirm that the quoted price includes the required testing and certification, so the customer knows the compliance paperwork is covered and not an add-on.
From accepted quote to invoice
Once the installation is signed off, use the accepted quote as the basis for a separate invoice or tax invoice. For deposits, progress payments, or retainers, issue the required invoice and account for VAT/GST/HST/sales tax under local timing rules. Reference the original quote number on the invoice — it helps the client's accounts team match the bill to what they approved.
The practical switch is small: change the heading from "Quote" to "Invoice", swap "Valid Until" for a payment due date, add a fresh invoice number, and apply your tax treatment. Our free invoice generator produces the matching invoice.
Tax on a quote
A quote can show estimated tax (VAT, GST, HST, or sales tax) so the client sees the likely total, but it is a commercial offer, not a tax invoice or sales-tax document — it does not by itself create a reporting point. If you display tax, mark it as estimated or indicative so it is not mistaken for a tax invoice.
Rates and thresholds differ by country and can change, and deposits or advance payments can affect when tax is due — confirm the treatment that applies to your work with your tax authority or an accountant.