Are Marketplace Fees Deductible? UK Rules

A £2,000 payment from a client can arrive as £1,800 after a platform has deducted commission, card processing and lead-generation charges. Are marketplace fees deductible? In most cases, yes. Where the fees are incurred wholly and exclusively for your construction trade, they are normally an allowable business expense for UK tax purposes.

The practical issue is not usually whether a genuine business fee can be claimed. It is recording it correctly. Contractors and subcontractors can easily understate turnover by entering only the amount paid into the bank, overlook VAT on a platform invoice, or mix personal and business subscriptions. Those errors affect more than the tax return. They can distort job margins, cash-flow forecasts and the figures used to manage growth.

Are marketplace fees deductible for UK tax?

Marketplace fees are generally deductible when they relate directly to generating, administering or collecting business income. This may include commission retained by a trade platform, monthly account subscriptions, fees for purchasing job leads, payment-processing charges, advertising upgrades and transaction charges on materials marketplaces.

The tax principle is straightforward: the cost must be incurred for the purpose of the trade. A plumber paying for leads in a defined trading area, a contractor paying a commission to win refurbishment work, or a developer paying a platform fee to market completed units will normally have a clear commercial reason for the expense.

The label used by the platform is less important than what the charge actually pays for. A monthly membership that gives a business access to tenders is usually a revenue cost. A fee deducted from each successful sale or completed job is usually a sales commission. Both are normally deductible from trading profits.

This does not mean every charge on a marketplace statement qualifies. A private purchase, a fee connected with investment activity rather than the trade, or a penalty for breaching a platform's terms needs separate consideration. If a cost has both business and private use, only the identifiable business proportion can be claimed.

Fees that are normally allowable

For a construction business, allowable costs will often include a platform subscription used to find domestic repair work, commissions on jobs secured through an online marketplace, card fees deducted when customers pay online, and charges for booking or tender-management tools.

It can also include a premium listing or paid advertising placement where the purpose is to promote the business. The fact that an advert does not result in a job does not by itself make it non-deductible. Marketing involves commercial judgement, not guaranteed results.

The key test is whether the expense has a genuine business purpose at the time it is incurred. HMRC does not require every lead to convert, but it does expect a credible link between the cost and the trade.

Costs that need more care

Some charges need a closer review. An initial set-up fee may be revenue expenditure if it simply gets the business onto a platform. However, expenditure that creates an enduring asset or forms part of acquiring a business could be capital in nature and may receive different tax treatment.

Refundable deposits are not automatically expenses, because they may remain an asset of the business. Fines and penalties can also be problematic. A late-payment charge that is commercial in nature may be treated differently from a penalty imposed for wrongdoing. Do not assume that every deduction shown on a statement is tax deductible.

Record gross income, not just the net payout

This is where many otherwise well-run records go wrong. If a customer pays £2,000 through a marketplace and the platform retains £200 in fees before paying £1,800 to your bank, your accounting records should normally show £2,000 of sales and £200 of marketplace fees. Recording only £1,800 as sales hides the true cost of winning that work.

That distinction matters when reviewing job profitability. A job can appear profitable if the marketplace commission is buried in reduced sales, even though the route to market is taking a significant percentage of revenue. Separating the fee gives you a more useful view of which lead sources are worth continuing.

It also matters for VAT registration monitoring. The taxable turnover test is based on the value of your taxable supplies, not simply the net cash received after an intermediary takes its charges. Netting off fees can therefore understate the turnover you are tracking against the registration threshold.

The same discipline helps when assessing turnover for finance applications, tender submissions and management reporting. A lender or main contractor may want to understand the scale of work you have delivered. Gross sales, supported by a clear expense line for commissions, provides a more accurate picture.

VAT on marketplace and platform charges

Whether VAT can be recovered depends on the invoice and your VAT position. If your business is VAT registered and receives a valid UK VAT invoice for a business-related platform fee, input VAT can normally be reclaimed, subject to the usual rules. If you are not VAT registered, the VAT is simply part of the cost.

Do not assume a platform charge has no VAT because the marketplace is online or because the fee was automatically deducted from a customer payment. Download the platform invoice or settlement statement and check the supplier, fee type and VAT treatment.

Overseas platforms require particular care. Some may provide services from outside the UK, which can bring the VAT reverse-charge rules into play for VAT-registered businesses. This is separate from the domestic reverse charge used in certain construction supply chains. A marketplace commission or software fee is not automatically subject to the construction domestic reverse charge simply because your business operates in construction.

Where the supplier is overseas, the invoice may show no UK VAT but still require an entry on your VAT return under the reverse charge. The correct treatment depends on the supplier's location, the service provided and your VAT status. This is an area where using the platform's default tax settings without review can create avoidable VAT errors.

Choose the right accounting period for the fee

For limited companies and businesses preparing accounts on an accruals basis, marketplace fees are generally recognised in the period to which they relate, even if payment is made later. For example, an annual platform subscription paid in advance may be spread over the subscription period where material.

Many sole traders use the cash basis, under which income and expenses are generally recorded when money is received or paid. If the platform deducts its commission before paying you, the settlement statement is essential evidence of both the gross receipt and the fee paid. The cash may never pass through your bank account, but the transaction still needs recording properly.

The most appropriate approach depends on your accounting basis and the size of the amounts involved. Consistency is valuable. It helps make your quarterly figures meaningful, particularly for subcontractors preparing for or already within Making Tax Digital for Income Tax reporting.

Keep evidence that supports the claim

A bank feed alone rarely tells the full story. Marketplace statements can show the customer payment, commission, VAT, refunds and any additional charges in one place. Retain those statements alongside invoices, subscription confirmations and evidence that the account is used for the business.

A practical digital record should show the date, supplier, amount, VAT treatment and purpose of each cost. In Xero or similar software, use a dedicated account such as marketplace commissions, lead-generation fees or payment-processing charges rather than posting everything to a general sundry expense code.

For businesses using multiple platforms, this level of detail is commercially useful. You can compare the cost of leads against conversion rates, average job value, cancellation rates and margin after labour and materials. That turns bookkeeping into a decision-making tool rather than a year-end exercise.

Do not confuse platform fees with CIS deductions

CIS deductions made by a contractor are not expenses in the same way as marketplace fees. They are payments on account of the subcontractor's tax and National Insurance position, supported by deduction statements. A platform commission is a trading cost; CIS tax withheld is a credit to be claimed through the appropriate tax return or company process.

Keeping these items separate is particularly important for subcontractors. Combining net platform payments, CIS deductions and VAT in one unexplained sales figure makes it harder to reconcile income, claim the right credits and prepare reliable accounts.

Marketplace fees are usually a valid cost of winning and servicing work. The stronger approach is to record gross income, code the fee accurately, check the VAT position and use the data to judge whether that marketplace is improving profit rather than merely filling the diary. For construction businesses balancing rising costs and delayed payments, that clarity can be as valuable as the deduction itself.