£400 a day excluding VAT is the published UK average, and it is worth knowing exactly how that number was made before leaning on it. Our South London estimate is £450 to £600 a day.
The £400 is arithmetic, not observation
Checkatrade derives its day rate openly: eight hours at the £50 hourly average. That is a modelling convention rather than a survey of what electricians bill for a day on site.
You can see the convention wobble on the publisher's own pages. Its rewire guide gives a £320 day rate against a £25 to £50 hourly range, and its electrical safety check guide gives £400 within a £250 to £500 spread. All exclude VAT. So the same publisher offers £320 and £400 as the day rate depending on which guide you open.
None of that makes the figure useless. It makes it a benchmark rather than a measurement, and the £250 to £500 spread is probably closer to the truth of what a real day costs than any single average.
The South London number is our estimate
No publisher breaks electrician day rates out by region. Which? says prices are likely to sit at the upper end of the scale in London and the South East; Checkatrade says labour rates are higher in London and the South East. Neither quantifies it.
The £450 to £600 range used across this site is our own uplift of the UK figure, in line with the premium those publishers describe. It is labelled as an estimate because that is what it is. Day rates of £350 to £650 circulating for London come from contractor blogs, not surveyed data.
Most electrical work is not sold by the day
This is the part that matters practically. Almost every domestic electrical job you are likely to buy is quoted as a fixed price: a consumer unit change, a set of sockets, an EV charger, a rewire, a condition report. The published cost guides reflect that: they price jobs, not days.
A fixed price is not a warning sign. It moves the risk of a job running long onto the electrician, and it means you know the number before work starts. A day rate applies to open-ended work: fault finding, snagging an installation someone else left, or a schedule of small jobs across a property where nobody can sensibly define the scope in advance.
What to use the day rate for
Use it to sanity-check the labour assumption inside a fixed quote rather than to build one.
If an electrician describes eight days on site for a rewire and the labour element of the quote reads £6,000, the arithmetic is roughly £750 a day and worth a question. If the same eight days carries £3,500 of labour, that is £437 a day, which sits at the bottom of the London estimate and is a different sort of question: whether the schedule is realistic, or whether materials have been loaded to compensate.
Neither answer is automatically wrong. Both are worth asking about, and an electrician who can explain the split is telling you something useful about how the price was built.
What a day rate does and does not include
Ask specifically whether the figure covers one person or two. Second-fix work and rewires often run with an apprentice or improver alongside the qualified electrician, and a quote built on two full day rates is not the same job as one built on a rate plus a helper.
Ask too what is outside the labour figure. Materials, testing and certification, waste removal, and any making good to plaster or decoration are all commonly separate. On a rewire the making good is explicitly excluded by the published guides, and that exclusion catches more homeowners than any rate ever does.
VAT, again, because it moves the number by a fifth
The £400 and the £450 to £600 both exclude VAT. On a five-day job that is a difference of £400 to £600 in itself.
A sole trader under the £90,000 taxable turnover threshold charges no VAT at all, which is a legitimate reason two honest quotes for identical work land 20% apart. Establish the basis of every figure before you compare anything, because a comparison across different VAT treatments tells you nothing about which electrician is better value.
A quoted day is only as good as the person filling it, which is where the shortlist matters.