Tax Guide for Market Traders and Car Boot Sellers

The Accounted Business Team·19 February 2026·7 min read

Selling at Markets and Car Boots? Here Is When HMRC Gets Involved

Selling at local markets, car boot sales, craft fairs, and pop-up events is how many small businesses start. Some people do it occasionally to clear out unwanted items. Others build a regular business buying and selling goods week after week. The tax treatment depends on which category you fall into.

This guide explains the rules for the 2025/26 tax year and sets out exactly what HMRC expects from people who sell at markets and car boots.

The Crucial Distinction: Clearing Out vs Trading

Selling personal belongings you no longer want is not trading. If you take a car load of old clothes, books, and kitchen gadgets to a car boot sale and sell them for £150, that is not taxable income. You are simply disposing of personal possessions, usually at a loss compared to what you originally paid.

Trading is different. You are trading if you:

Buy goods specifically to resell at a profit
Regularly attend markets or car boots with the intention of making money
Source stock from wholesalers, clearance sales, or other suppliers
Have a market stall as a going concern with regular pitch bookings
Reinvest your takings into more stock

The difference is intention and regularity. Selling your grandmother's china once is not trading. Buying job lots of china from house clearances and selling them every weekend is.

The £1,000 Trading Allowance

If your total gross trading income is £1,000 or less in the tax year, you do not need to register as self-employed or file a Self Assessment return. The trading allowance applies automatically.

Once your gross income (total sales, not profit) exceeds £1,000, you must:

Register as self-employed with HMRC
Keep records of all income and expenses
File a Self Assessment tax return by 31 January following the end of the tax year

You can still use the £1,000 as a flat deduction instead of claiming actual expenses, but for most regular market traders, actual expenses will be significantly higher than £1,000 and will save you more tax.

Registering with HMRC

Register as self-employed within three months of starting to trade. You can do this online at gov.uk. HMRC will send you a Unique Taxpayer Reference (UTR) number by post, which you need to file your tax return.

If you have been trading for a while without registering, do it now. HMRC charges penalties for late registration, and the longer you leave it, the worse it gets.

Expenses Market Traders Can Claim

Stock Purchases

The cost of goods you buy to resell is your largest expense. Keep every receipt and invoice from suppliers. If you buy stock from wholesalers, clearance sales, car boot sales, or online, record the date, what you bought, how much you paid, and the supplier.

Stock accounting: You can only deduct the cost of stock you have sold, not stock you still have at the end of the tax year. If you buy £3,000 of stock during the year and still have £800 worth unsold at 5 April, your cost of goods sold is £2,200. The £800 of closing stock carries forward.

For market traders with high volumes and varied stock, a simple spreadsheet tracking purchases and a year-end stock count is sufficient.

Pitch Fees and Market Rent

The cost of renting your market stall pitch is fully deductible. This includes:

Regular pitch fees at indoor and outdoor markets
Temporary pitch fees at car boot sales and craft fairs
Event entry fees for trade fairs
Deposits for pitches

Vehicle Costs

If you use a van or car to transport stock to markets, you can claim vehicle costs. Choose one method:

Simplified mileage rates:

45p per mile for the first 10,000 business miles
25p per mile after that
This covers everything: fuel, insurance, tax, repairs

Actual costs:

Fuel, insurance, road tax, MOT, servicing, repairs, tyres, depreciation
Claim only the business proportion if you also use the vehicle personally

For a market trader who drives a van to multiple markets each week, vehicle costs add up quickly. A trader doing 15,000 business miles a year would claim (10,000 x 45p) + (5,000 x 25p) = £4,500 + £1,250 = £5,750 using the mileage rate.

Stall Equipment

Tables, display stands, gazebos, tarpaulins, signage, price tags, cash boxes, card readers, and any other equipment used at your stall are deductible. If an item costs less than £1,000, claim it as a revenue expense. For more expensive items, use capital allowances.

Packaging and Bags

Carrier bags, wrapping materials, tissue paper, and branded packaging are all deductible.

Card Payment Fees

If you use a card reader (SumUp, Square, iZettle), the transaction fees are deductible. The cost of the card reader itself is also deductible.

Insurance

Public liability insurance is strongly recommended for market traders and is fully deductible. Stock insurance and stall insurance are deductible too.

Phone

If you use your phone for supplier communications, online sourcing, or managing your business, claim the business proportion of your phone contract.

Storage

If you rent a storage unit or lock-up for stock, the rent is fully deductible. If you use a room at home, claim a proportion of household costs or use HMRC's flat rates.

Record Keeping for Cash Businesses

This is where market traders face the most scrutiny from HMRC. Cash businesses are higher risk for tax evasion, and HMRC knows it. You need to keep thorough records to protect yourself.

Daily Sales Records

Record your takings every day you trade. Write down:

Date and location (which market or event)
Total cash takings
Total card takings
Any other income (selling online, deposits received)

If you do not issue individual receipts to customers, record total daily takings. Count your float at the start and end of each trading day — the difference is your takings.

Banking Your Takings

Deposit cash takings into your business bank account regularly. HMRC expects to see a clear trail from sales to bank deposits. If you spend cash takings directly on stock or expenses without banking them, record those transactions carefully.

A separate business bank account is not legally required for sole traders, but it makes record keeping dramatically easier and is the single best thing you can do to simplify your tax return.

Receipts for Everything

Keep receipts for every business purchase. Photograph paper receipts immediately — they fade. If you buy stock at a car boot or from a private seller who does not give receipts, write your own record: date, description of goods, quantity, amount paid, and who you bought from.

Keep Records for Five Years

HMRC can enquire into your tax return for up to five years after the filing deadline. Keep all records — daily takings, bank statements, receipts, stock records — for at least this period.

How Much Tax Will You Pay?

Your taxable profit is total sales minus allowable expenses (including cost of goods sold). Tax rates for 2025/26:

Personal Allowance: £12,570 tax-free
Basic rate: 20% on profits from £12,571 to £50,270
Higher rate: 40% above £50,270

Plus National Insurance:

Class 2: £3.45 per week if profits exceed £6,725
Class 4: 6% on profits between £12,570 and £50,270, 2% above

Common Mistakes

Thinking car boot sales are always tax-free. Selling personal items is fine. Buying to resell is trading.
Not recording cash sales. If HMRC enquires and you have no records, they will estimate your income — and their estimate will not be in your favour.
Forgetting stock at year-end. Unsold stock is not an expense until it is sold. Count your stock at 5 April.
Mixing personal and business money. Use a separate bank account and card reader to keep things clean.

Start Your Free Trial

Keeping records does not have to be painful. Accounted is built for small businesses that need simple, reliable bookkeeping. Connect your bank account, log your cash takings, and let Penny categorise your expenses. Start your free trial with Accounted today and keep HMRC happy without the hassle.

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