Is a website a tax-deductible expense?

Short answer: yes, in almost every realistic case a UK business gets tax relief on what it spends on its website. The part that catches people out is when the relief arrives, and that depends on something most people have never heard of — whether HMRC treats the spend as capital or revenue.

It is worth ten minutes of your time, because the two routes can differ by a year or more in when the money comes back to you.

A necessary caveat. We build websites; we are not accountants, and this is general information rather than advice about your situation. Your accountant knows your books and we do not. Everything below is checkable against HMRC’s own manuals, which we have linked, and your accountant will settle any question in a two-minute phone call.

The distinction that decides everything

HMRC splits business spending into two kinds.

Revenue expenditure is the day-to-day cost of running the business. Rent, phone bills, insurance, materials. You deduct the whole amount from your profit in the year you spend it, and you pay less tax that year.

Capital expenditure buys something with lasting value — an asset the business will still have next year. A van. A machine. You generally cannot simply deduct it as a running cost, but it usually qualifies for capital allowances instead, which is a different mechanism for getting relief on the same money.

A website can fall on either side of that line, and HMRC has published guidance on exactly this point.

Where HMRC draws the line for websites

HMRC’s position, in plain terms:

• Building a website that creates an enduring asset is usually capital. If you paid a developer several thousand pounds for a site you own outright, that is buying an asset, not paying a running cost.
• The domain name is usually capital. Along with the underlying infrastructure and any software that provides the site’s actual functionality.
• Hosting, maintenance and updating are revenue. HMRC gives the specific example of updating a website for price changes: that is a running cost and it is deductible in full in the year.
• Research and planning before you commit are revenue. The work you do deciding whether to proceed is allowable straight away, even if the build that follows is capital.

The underlying test is whether the money bought something with an enduring benefit. A one-off build usually did. Keeping a site running usually did not.

Why capital is not bad news

People sometimes hear “capital” and assume they have lost the deduction. Usually they have not.

Capital spending on a website generally qualifies as plant and machinery for capital allowances purposes, and most small businesses can claim the Annual Investment Allowance — which, for the great majority of sole traders and small limited companies, means the full amount still comes off in the first year.

So in practice the two routes often land in the same place. The difference matters in the cases where they do not: where you are near an allowance limit, where the business made a loss, or where the spend straddles two tax years. That is exactly the sort of thing worth asking your accountant about rather than guessing.

What a monthly subscription looks like

This is the part most guides skip, and it is the arrangement a lot of small businesses are now on.

If you pay a monthly fee for a website — where the fee covers the writing, the hosting, the domain, the changes and the support, and you are not buying an asset outright — that is much more straightforwardly a running cost. There is no enduring asset being created on your balance sheet. It behaves like your phone bill or your insurance: a revenue expense, deducted in full, in the year you paid it.

That simplicity is a genuine advantage and it is worth being honest about why. It is not that you get more relief. It is that there is nothing to classify, nothing to depreciate, no capital allowances claim to make, and no conversation about which tax year the asset came into use. Twelve payments, one line in the accounts.

What it actually costs after relief

Worked example, using a £47 a month website and 2026/27 rates. Numbers rounded.

A sole trader paying basic-rate income tax at 20% also pays Class 4 National Insurance at 6% on profits in the main band. So each £1 of allowable expense reduces the tax and NI bill by roughly 26p.

A higher-rate sole trader gets relief at 40% plus 2% Class 4, so roughly £237 back — an effective cost nearer £327 a year.

A limited company deducts the cost against corporation tax instead. At the 19% small profits rate the relief is about £107, giving an effective cost of roughly £457.

Two honest notes on that table. First, relief only reduces tax you were going to pay — if the business made no taxable profit, there is nothing to reduce this year, though losses can often be carried forward. Second, none of this makes a website cheaper than not having one. It makes it cheaper than the sticker price, which is a different and smaller claim.

Keep the records, or the deduction is theoretical

The relief is only as good as your ability to evidence it if HMRC asks. It is not onerous:

• keep the invoices, not just the bank line — a card statement showing £47 does not say what it bought;
• make sure the invoice is addressed to the business, not to you personally;
• if the same supplier bills you for several things, keep the breakdown;
• note anything unusual at the time. A one-off rebuild sitting inside an otherwise monthly arrangement is exactly the sort of thing that is obvious in March and unrecoverable the following January.

If you are VAT registered and your supplier is too, the VAT on the invoice is normally reclaimable as input tax in the usual way, and the figures above would then be based on the net amount.

The three questions to ask your accountant

You will get a better answer in less of their time if you arrive with these:

1. Is this website spend capital or revenue in my case?
2. If it is capital, does it qualify for the Annual Investment Allowance, and does my current claim leave room for it?
3. Which tax year does the deduction land in?

Take the invoice with you. That is genuinely all they need.

In summary

Nearly every business gets relief on its website costs one way or another. A one-off build is usually capital, which normally still means full relief in year one through capital allowances. A monthly subscription is usually a plain running cost, deducted in full, with nothing to work out.

That does not make a website free, and no honest guide would suggest it does. But if you have been treating the monthly figure as the real cost, the real cost is meaningfully lower — and it is worth knowing which number you are actually comparing when you weigh one option against another.

Sources: HMRC Business Income Manual — capital/revenue divide: computer software · GOV.UK — expenses if you’re self-employed · Association of Taxation Technicians — tax treatment of software and website costs