Should a builder’s quote include VAT?

A quote from a VAT-registered builder should state clearly whether the price includes or excludes VAT. If it is silent, ask, because it changes the total by 20%. On a £20,000 job that is £4,000. A professional quote makes the VAT position explicit; one that leaves it ambiguous is either careless or hoping you assume the lower figure.

Do all builders charge VAT?

No. A builder only has to register for and charge VAT once their taxable turnover passes the UK threshold, which is £90,000 in a rolling 12-month period as of 2026. Smaller builders below that threshold do not charge VAT at all, so their quotes have no VAT to add. This is legitimate and common for sole traders and small firms, but the quote should still make the position clear.

How do I know if a quote is excluding VAT?

Look for the words "plus VAT", "ex VAT", "VAT not included", or a net figure with VAT shown as a separate line. If the quote shows a single total with no mention of VAT and the builder is VAT-registered, ask directly whether that total is inclusive. Never assume; a 20% surprise on completion is one of the most common budgeting shocks in UK building work.

Is all building work charged at 20% VAT?

Most repair, renovation, and improvement work to an existing home is standard-rated at 20%. Some work qualifies for a reduced 5% rate (certain energy-saving measures, some residential conversions, and renovations of homes empty for two or more years) or zero rate (new-build dwellings). These reliefs are specific and conditional, so if a builder applies a reduced rate, it should be stated and justified on the quote.

Should I take a cash discount to avoid VAT?

No. A builder offering a "cash price" to avoid VAT is proposing tax evasion, which is illegal and implicates you as well as them. It also leaves you with no paperwork, no contract, and no recourse if the work goes wrong or a warranty claim arises. The apparent saving disappears the first time you need to prove the job ever happened.

Does my builder’s quote include VAT? How to check

How to tell whether a UK builder’s quote includes VAT, why the 20% question can change your budget by thousands, when a builder must charge it, and the cash-discount trap to avoid.

A calculator and receipts on a desk for working out VAT. — Photo by Kelly Sikkema on Unsplash

VAT is the quietest line on a builder’s quote and one of the loudest surprises on completion. A quote can look perfectly reasonable until you discover the figure was net, and 20% lands on top at the end. On a £20,000 job that is a £4,000 shock, and it is entirely avoidable by asking one question before you sign.

This guide explains when VAT applies, how to spot a quote that excludes it, and the cash-discount trap to walk away from. For the other costs that quietly sit outside a headline price, see the 15 hidden costs.

Why the VAT question matters so much#

VAT on most home building work is 20%. That is not a rounding error, it is a fifth of the bill. Two quotes can look close on paper while being thousands apart in reality, simply because one included VAT and the other did not. Before you compare totals or accept a price, you have to know whether VAT is in the number.

Not every builder charges VAT#

A builder only has to register for VAT once their taxable turnover passes the UK threshold, which is £90,000 in any rolling 12-month period as of 2026. Below that, a builder is not VAT-registered and adds no VAT at all. This means:

A smaller sole trader or firm under the threshold quotes with no VAT to add. Their total is the total.
A VAT-registered builder must charge VAT, and their quote should show it.

Neither is better or worse on its own, but it does explain why one quote carries VAT and another does not. See should I hire a VAT-registered builder for what registration does and does not tell you about a builder.

How to spot a quote that excludes VAT#

Look for the tell-tale phrasing:

"Plus VAT", "ex VAT", or "VAT not included"
A net figure with VAT listed as a separate line below it
A single total with no mention of VAT at all, from a builder you know is registered

The last one is the dangerous case. If the quote is silent and the builder is registered, ask outright: "Is this total inclusive of VAT?" Get the answer in writing. A clear quote states the VAT position without being asked, which is one of the marks of a professional one. See how to read a builder’s quote.

When a reduced rate applies#

Most repair and improvement work to an existing home is standard-rated at 20%, but some work qualifies for less:

5% reduced rate can apply to certain energy-saving measures, some residential conversions, and renovations of homes empty for two or more years.
Zero rate can apply to new-build dwellings.

These reliefs are specific and conditional. If a builder applies a reduced rate, the quote should say so and explain why, because getting it wrong is a problem for both of you.

The cash-discount trap#

Sooner or later a builder may offer a "cash price" that conveniently sidesteps VAT. Decline it. It is tax evasion, it implicates you as well as the builder, and it strips away the paperwork, contract, and recourse you would need if the work went wrong. The "saving" is the first thing to vanish the moment you need to prove the job ever happened. This is one of the classic patterns covered in signs of a rogue builder.

Before you sign#

Is the builder VAT-registered? (A registered company or firm over £90,000 turnover will be.)
Does the quote state clearly whether VAT is included or excluded?
If it is silent, have you asked and got the answer in writing?
If a reduced rate is applied, is it explained?
Have you compared quotes on the same VAT basis (all inclusive, or all exclusive)?

Once the VAT position is clear, the next question is whether the underlying price is fair. Paste or upload your quote into Check the Quote and we check every line against current UK market rates for your postcode and flag what sits above the fair range, so you know the price is right before you worry about the tax on top. Your first check is free.

Got a quote you want checked?

Paste any UK contractor quote and Check the Quote compares every line item against current market rates, flags missing scope, and runs a Companies House check on the contractor. Free on your first project.

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Frequently asked questions

Should a builder’s quote include VAT?: A quote from a VAT-registered builder should state clearly whether the price includes or excludes VAT. If it is silent, ask, because it changes the total by 20%. On a £20,000 job that is £4,000. A professional quote makes the VAT position explicit; one that leaves it ambiguous is either careless or hoping you assume the lower figure.
Do all builders charge VAT?: No. A builder only has to register for and charge VAT once their taxable turnover passes the UK threshold, which is £90,000 in a rolling 12-month period as of 2026. Smaller builders below that threshold do not charge VAT at all, so their quotes have no VAT to add. This is legitimate and common for sole traders and small firms, but the quote should still make the position clear.
How do I know if a quote is excluding VAT?: Look for the words "plus VAT", "ex VAT", "VAT not included", or a net figure with VAT shown as a separate line. If the quote shows a single total with no mention of VAT and the builder is VAT-registered, ask directly whether that total is inclusive. Never assume; a 20% surprise on completion is one of the most common budgeting shocks in UK building work.
Is all building work charged at 20% VAT?: Most repair, renovation, and improvement work to an existing home is standard-rated at 20%. Some work qualifies for a reduced 5% rate (certain energy-saving measures, some residential conversions, and renovations of homes empty for two or more years) or zero rate (new-build dwellings). These reliefs are specific and conditional, so if a builder applies a reduced rate, it should be stated and justified on the quote.
Should I take a cash discount to avoid VAT?: No. A builder offering a "cash price" to avoid VAT is proposing tax evasion, which is illegal and implicates you as well as them. It also leaves you with no paperwork, no contract, and no recourse if the work goes wrong or a warranty claim arises. The apparent saving disappears the first time you need to prove the job ever happened.

Last updated: 24 May 2026

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