Good record keeping is one of the biggest challenges for trading card sellers. Many sellers grow quickly, sell across multiple platforms, and deal with large volumes of small transactions.

Without proper records, it becomes difficult to prove profits, support VAT positions, separate personal collecting from business stock, or respond confidently to HMRC if questions arise.

What Records Do Trading Card Sellers Need to Keep?

HMRC requires self-employed individuals and companies to keep accurate business records. For trading card sellers, this typically includes:

  • Sales records from all platforms
  • Platform payout statements
  • Invoices and receipts for stock purchases
  • Shipping and packaging costs
  • Platform and payment processing fees
  • Grading and authentication invoices
  • Mileage and travel records
  • Bank statements for business activity
  • VAT records if you are VAT registered
  • Year-end stock and inventory records

HMRC guidance says self-employed business records should usually be kept for at least 5 years after the 31 January submission deadline of the relevant tax year.

Records are not just receipts. HMRC may want to understand the full trail from purchase, to listing, to sale, to payout, to bank deposit.

Tracking Sales Across Multiple Platforms

Many trading card sellers use a mix of marketplaces, live selling apps, social media, private sales and card shows. HMRC expects all sales to be included, not just those paid into your main bank account.

A common mistake is relying only on payout totals. Instead, you should:

  • Record gross sales before platform deductions
  • Separately record platform fees, payment processing fees and refunds
  • Reconcile payouts to sales reports
  • Track cash and private sales as well as marketplace sales
  • Keep evidence for shipping income charged to customers

This gives you a clear audit trail if HMRC ever asks questions. It also helps you understand which platforms are actually profitable once fees, postage and stock costs are included.

Stock Records and Cost of Sales

Stock is one of the most important areas for trading card sellers. HMRC expects you to keep records that show:

  • What stock you purchased
  • When you purchased it
  • How much it cost
  • When it was sold
  • Whether it was sold as a single, bundle, break, repack or sealed product

This applies whether you buy singles, sealed products, bulk collections or mixed lots.

Clear stock records help ensure profits are calculated correctly, VAT margin scheme eligibility can be supported, and personal collecting is separated from business stock.

Second Hand Cards and VAT Evidence

If you use the VAT margin scheme for eligible second hand cards, HMRC requires strong evidence. The onus is on the business to show that the scheme is being used correctly.

This can include:

  • Seller details
  • Purchase price
  • Date of purchase
  • Description of the cards
  • Evidence that VAT was not reclaimed on the purchase
  • A clear link between each eligible purchase and sale

Without this evidence, HMRC may disallow the margin scheme and assess VAT on the full selling price. That can be expensive if your margins are tight.

Common Record Keeping Mistakes Card Sellers Make

Some of the most common issues include:

01Mixing personal and business transactions. This makes it harder to prove what belongs to the business and what belongs to your personal collection.
02Losing purchase evidence. Missing receipts, screenshots and seller details can weaken stock and VAT claims.
03Not tracking stock properly. You need to know what was bought, what was sold and what remains at year end.
04Relying on platform summaries only. Payout reports often hide gross sales, refunds, fees and shipping splits.
05Falling behind during busy periods. Live selling, card shows and big releases can create a backlog quickly.

These mistakes often only become obvious during a tax return, VAT review or HMRC query.

How Proper Systems Make Life Easier

Using cloud accounting software and structured processes can make record keeping far easier. With the right setup, you can:

  • Automate transaction imports
  • Track expenses consistently
  • Reconcile sales accurately
  • Separate personal collecting from business stock
  • Prepare tax returns with confidence
  • Reduce stress if HMRC asks for information

A simple system followed consistently is usually better than a complicated spreadsheet that only gets updated once a year.

Why Specialist Support Matters

Trading card sellers face unique challenges around stock, VAT, live selling, platform fees and marketplace payouts. A specialist accountant helps you:

  • Set up compliant record keeping systems
  • Stay on top of bookkeeping
  • Support VAT positions
  • Understand stock and cost of sales
  • Respond confidently to HMRC queries

Strong records are not just about compliance. They also help you understand profitability and make better decisions as you grow.

If your card business is growing, our accountant for trading card sellers service can help you keep the numbers clean from day one.

Further reading