A brown envelope lands on your doormat marked “possible undeclared Amazon income”. This is the HMRC Amazon seller letter – a polite but urgent “nudge” telling online retailers that the tax office now has their sales data. We have spoken to 100s of people about HMRC letters, and here is our guide on what this means for you, how to deal with it and what to do if you need help.
Why is HMRC writing to Amazon sellers in 2025?
Since 2024 Amazon has been required to report seller data to HMRC under new rules which means that marketplaces share sales data with HMRC – the same legislation driving letters to eBay, Vinted and Etsy users. For Amazon FBA (Fulfilled by Amazon) sellers, Amazon already held granular data on every order, return and refund. HMRC now receives:
- Seller identity and bank details
- Gross annual receipts
- Number of transactions
- Country of dispatch and delivery
The first full data‑dump for the previous years have landed on HMRC’s desk and they are rolling out letters in batches. We have already seen this hit eBay Sellers. Expect a wave of letters soon after as HMRC cross‑checks that data against filed returns.
Does Selling on Amazon always mean tax?
Almost always, yes. Amazon’s ecosystem is designed for business‑like selling rather than casual decluttering, which means HMRC assumes you’re trading once you list regularly. But the £1,000 trading allowance can still apply if you’re genuinely small‑scale.
| Test | Key limit | What it means |
|---|---|---|
| £1,000 Trading Allowance | Annual profit ≤ £1,000 | No tax return if you have no other filing triggers. |
| Badges of Trade | Intent, frequency, organisation | FBA restocking, paid ads, private‑label branding all scream “business”. |
| VAT Registration | £90,000 turnover (2025 threshold) | Compulsory if exceeded in any rolling 12 months. |
Main takeaway: Most FBA operations exceed at least one of those limits – so a timely HMRC amazon tax return is non‑negotiable.
Snapshot: Amazon business tax UK 2025 rules
- Income Tax & NIC – Payable on profits if you’re a sole trader on your Annual Self Assessment. Companies pay Corporation Tax and filed on their CT600.
- VAT – Standard, reduced and zero‑rated items apply; Amazon’s fees are subject to VAT too.
What does the HMRC letter about Amazon sales look like?
Most HMRC letter amazon sales documents contain:
- An indication that they know your have sold on Amazon and therefore need to tell them about your income
- 30‑day response window – to confirm, correct or disclose.
- Reference to penalties – up to 100 % of the unpaid tax plus interest if you ignore the letter.
The heading often calls it a “one‑to‑many nudge” – HMRC’s way of batch‑educating sellers who may have made mistakes.
Step‑by‑step: how to respond within 30 days
| Day | Task | Tips |
|---|---|---|
| 1 | Open the letter | Start the clock. |
| 2‑5 | Export Amazon transaction reports (Amazon Seller Central › Reports › Payments) | Include both FBA and MFN orders. |
| 6‑10 | Gather costs – product cost, Amazon fees, shipping, PPC spend | Use Amazon’s own fee invoice PDF for evidence. |
| 11‑15 | Calculate profit and compare to trading allowance | Remember to adjust for returns and reimbursements. |
| 16‑20 | Check VAT position – crossing £90k? register ASAP | Late VAT registration penalties are harsh. |
| 21‑25 | Draft or amend Self Assessment / Corporation Tax returns | “Amazon” has its own income box on SA103 for sole traders. |
| 26‑30 | Reply to HMRC – supply calculations or appoint an accountant | A professional response usually halves potential penalties. |
Worked examples
- Starter Sam – 120 items sold via MFN, £4,200 turnover, £1,200 profit. Above the allowance, so must file Self Assessment for 2024/25.
- FBA Frances – Private‑label cosmetics, £95,000 turnover, £18,000 profit. Needs VAT registration, quarterly MTD submissions and possibly incorporation for tax efficiency.
- Hobby Holly – Sold old textbooks, £600 profit. Below trading allowance but still receives the letter because Amazon’s threshold is turnover‑based. Respond “no tax due” with evidence.
Do I need to report taxes to HMRC – take our questionnaire
Common myths about HMRC amazon FBA tax
- “Amazon handles VAT so I don’t need to think about it.”
Fulfilment centres merely collect VAT on fees; you’re responsible for VAT on the products. - “If I reinvest everything there’s no tax.”
HMRC taxes profit, not cash withdrawals. Reinvestment doesn’t wipe out the taxable figure. - “Only my UK store counts.”
Sales through Amazon.de, .fr or .com to UK customers are all reportable to HMRC .
Filing your Amazon Self Assessment UK return
- Income section: Use SA100 – self employment section. Enter total Amazon turnover less allowable costs.
- Expenses: Amazon referral fees, FBA fees, packaging, software (Helium 10, Jungle Scout), advertising and mileage to the post office.
- Capital allowances: Claim on computers, label printers or storage racks used in the business.
- Dates: 2024/25 tax return deadline online is 31 January 2026. Registration deadline for this tax year is October 2025. File early if you’ve received a nudge.
If your Amazon business is incorporated, submit your CT600 nine months after year‑end; MTD for Corporation Tax is slated for late‑decade, but good bookkeeping now wins later.
Frequently asked questions
Q: I can’t match HMRC’s figure – it seems inflated.
A: HMRC gets gross receipts (sales + shipping). Show refunds, returns, and Amazon FBA reimbursements to reconcile. Attach your Seller Central reports as proof.
Q: I opened my Amazon account years ago – can HMRC look that far back?
A: Up to four years for innocent errors, six for carelessness, 20 for deliberate evasion. Better to disclose now.
Q: I’m on Universal Credit – will declaring Amazon income affect benefits?
A: Yes. Declare promptly; DWP cross‑checks HMRC data.
Summary
- The HMRC amazon seller letter is a nudge, not a bill – but ignore it and HMRC will estimate the tax.
- Most Amazon activity looks like a business, so expect to file an HMRC amazon tax return and pay Income Tax, NIC and possibly VAT.
- Keep detailed records of fees and costs to shrink your profit and your bill.
- Professional advice often saves more than it costs – especially when penalties loom.
How we can help
Our ecommerce‑only accountancy team files hundreds of Amazon returns and negotiates with HMRC every week. Book a free 15‑minute discovery call and we’ll turn spreadsheets into straight answers.
Disclaimer
This article is for general guidance only. Tax law changes, thresholds and personal circumstances differ. Always check the latest HMRC guidance or seek professional advice.
