Written by Sharaz Zaman, Founder of GM Professional Accountants, AAT Member, London accountant since 2012.
Yes, ecommerce businesses need a specialist accountant. Online selling on platforms such as Shopify, Amazon, eBay, Etsy, TikTok Shop and WooCommerce creates tax obligations that general accountants routinely miss, from VAT on cross-border sales to inventory valuation, import duties, platform fees, and Making Tax Digital compliance. GM Professional Accountants serves ecommerce sellers across London, Ilford, Wimbledon, Old Street, East London, and Essex with accounting built specifically for online retail.
Definition An accountant for ecommerce businesses is a specialist adviser who manages the unique financial obligations of online sellers, including multi-platform VAT compliance, inventory accounting, marketplace fee reconciliation, import duty planning, corporation tax, and Making Tax Digital submissions for UK online retailers.
Key Takeaways
1 The UK ecommerce market is worth over £286 billion in 2025, with nearly 62 million online shoppers (Statista / Netguru, 2025).
2 VAT registration is mandatory once taxable turnover exceeds £90,000 per annum; overseas sellers must register from their very first UK taxable sale (HMRC, 2025).
3 Making Tax Digital for Income Tax (MTD ITSA) applies to sole trader ecommerce sellers earning over £50,000 from April 2026 and over £30,000 from April 2027.
4 Platform marketplace rules changed in June 2025: HMRC now holds online marketplaces liable for VAT on goods sold by overseas sellers stored in the UK.
5 A specialist accountant can reconcile multi-platform payouts, reclaim input VAT on stock and fulfilment costs, and structure your business to protect profits as you scale.
| £286bn UK Ecommerce Market Size 2025 | £90,000 VAT Registration Threshold 2025 | 20% Standard UK VAT Rate on Online Sales | 25% Corporation Tax Rate 2025-26 |
Why Do Ecommerce Businesses Need a Specialist Accountant?
General accountants handle payroll and year-end accounts competently enough. But ecommerce is one of the most technically demanding areas of UK tax law, and a generalist adviser will often miss the issues that cost online sellers the most money. Selling through Amazon, Shopify, eBay, Etsy or TikTok Shop means you are dealing with platform-specific payout reports, marketplace fees, inventory held in UK fulfilment centres, potential VAT obligations in multiple countries, and import duties on stock sourced abroad. Each of these has a direct tax consequence that a specialist accountant must understand. At GM Professional Accountants, our team works with ecommerce clients from our offices in Ilford, Wimbledon, Old Street, and across East London and Essex. We understand the platforms, the payment gateways, and the HMRC rules that apply specifically to online sellers.What Are the Main Tax Obligations for UK Ecommerce Sellers?
If you run an online store, whether as a sole trader or through a limited company, the following tax obligations apply. Missing any of them can result in HMRC penalties, backdated VAT assessments, and interest charges.| Tax Obligation | Who It Applies To | Key Deadline / Threshold | Consequence of Non-Compliance |
| VAT Registration | UK sellers over £90,000 taxable turnover; overseas sellers from first sale | Register within 30 days of exceeding threshold | Backdated VAT plus penalties and interest |
| Self Assessment (Sole Trader) | All sole trader ecommerce sellers | 31 January filing deadline each year | £100 immediate penalty, rising steeply |
| Corporation Tax | Limited company ecommerce sellers | 9 months after accounting year end | Interest and surcharges on late payment |
| MTD for VAT | All VAT-registered ecommerce businesses | Already mandatory; returns via approved software | Non-compliance penalties from HMRC |
| MTD ITSA | Sole traders earning over £50,000 from April 2026; over £30,000 from April 2027 | Quarterly digital reporting required | Penalty points system for missed submissions |
| Import VAT and Customs Duty | Sellers importing stock from outside the UK | At point of import; reclaimable via VAT return | Lost VAT reclaim; potential customs seizure |
How Does VAT Work for UK Ecommerce Businesses?
VAT is the single most complex area of ecommerce tax, and one of the most costly if you get it wrong. The standard rate in the UK is 20%, and you must register once your taxable turnover passes £90,000 in any rolling 12-month period. If you are an overseas seller storing goods in the UK through Amazon FBA or a similar fulfilment service, there is no threshold at all. You must register from your very first taxable sale.What Are the VAT Rules for Marketplace Sellers?
Marketplaces such as Amazon and eBay operate as deemed suppliers for VAT purposes on orders up to £135. This means the platform collects and remits the VAT to HMRC rather than you as the seller. For orders over £135, the rules shift and you may become responsible for accounting for import VAT yourself. In June 2025, HMRC issued updated guidance confirming that online marketplaces are now liable for VAT on goods of any value where those goods are located in the UK at the point of sale and are sold by overseas businesses. This is a significant change that affects every non-UK seller using UK fulfilment centres.What Is the £135 Import VAT Threshold and How Does It Affect Me?
For goods imported into the UK with an intrinsic value of £135 or less, you must collect VAT at the point of sale and remit it directly to HMRC. For consignments above £135, you can either charge VAT at checkout or ship on a Delivered Duty Unpaid basis, though the latter creates a poor customer experience and is generally not recommended. Getting this wrong can mean backdated VAT assessments going back years, plus penalties and interest. A specialist accountant ensures your system is set up correctly before any liability builds up.Should I Run My Ecommerce Business as a Sole Trader or Limited Company?
The right structure depends on your profit levels, growth plans, and how much you intend to retain in the business versus extract as personal income. There is no universal answer, but the table below covers the key differences:| Factor | Sole Trader | Limited Company |
| Tax on profits | Income Tax up to 45%; Class 4 NI at 9% on profits between £12,570 and £50,270 | Corporation Tax at 25% (profits over £250,000); 19% small profits rate below £50,000 |
| Liability | Unlimited personal liability | Limited to shares held |
| Profit extraction | All profit taxed as income in the year it arises | Flexible: salary plus dividends; retained profits at lower rate |
| MTD ITSA from April 2026 | Quarterly digital reporting if income exceeds £50,000 | Not directly affected; own filing cycle applies |
| Growth and investment | Simpler; less admin overhead | Easier to raise finance; more credible to suppliers |
What Accounting Services Do Ecommerce Businesses in London Need?
GM Professional Accountants provides a complete accounting service designed around the way ecommerce businesses actually operate. Here is what that covers in practice: VAT Registration and Returns We handle your VAT registration, quarterly MTD-compliant returns, and VAT planning. If you sell across multiple channels, we reconcile each platform separately to ensure your VAT is calculated correctly. We advise on the Flat Rate Scheme, Annual Accounting, and Cash Accounting options to find the most beneficial approach for your business.
Platform Payout Reconciliation Amazon, Shopify, eBay and Etsy each produce complex settlement reports that include fees, refunds, reserves, and promotional credits. We reconcile these reports to your bank account every month so your accounts reflect the real picture. This is one of the most common areas where ecommerce businesses run into problems with HMRC enquiries.
Inventory Accounting and Stock Valuation Stock held for resale must be properly valued on your balance sheet. We apply the lower of cost or net realisable value under UK GAAP and help you track landed cost, which includes the purchase price, import duty, freight, and insurance. Accurate stock valuation directly affects your corporation tax position.
Corporation Tax Planning and Returns We prepare your annual accounts and corporation tax return, identifying every allowable deduction including marketplace fees, software subscriptions, packaging, fulfilment costs, and home office expenses where applicable. We also advise on capital allowances for equipment and R&D tax credits if you have built proprietary technology for your store.
Making Tax Digital (MTD ITSA) Preparation From April 2026, sole trader ecommerce sellers earning over £50,000 must file quarterly digital income and expense reports to HMRC under MTD ITSA. The threshold drops to £30,000 in April 2027. We will get your bookkeeping system MTD-ready before the deadline so you face no disruption or last-minute panic.
Import Duty and Cross-Border Tax Planning If you source stock from China, the EU, or elsewhere, import VAT and customs duty affect your cash flow significantly. We help you calculate the correct landed cost, reclaim import VAT through your VAT return, and structure your supply chain to minimise unnecessary duty costs within the law.
Related Reading If you sell through a dropshipping model, you face additional VAT and supply chain considerations. Read our detailed guide: Accountants for Dropshipping Ecommerce Businesses
Which Ecommerce Platforms Does GM Professional Accountants Work With?
We work with sellers on all major UK ecommerce and marketplace platforms. Each one has different reporting formats, fee structures, and VAT implications. Our London and Essex teams are familiar with all of them:| Platform | Key Accounting Considerations |
| Amazon FBA and FBM | Payout reconciliation, FBA storage fees, returns, overseas VAT, marketplace deemed supplier rules |
| Shopify | Shopify Payments integration, multi-currency sales, payment gateway fees, Shopify subscription costs |
| eBay | Managed payments reconciliation, seller fees, promoted listings deductions, returns reserves |
| Etsy | Etsy Payments, listing fees, offsite ads charges, currency conversion from international sales |
| TikTok Shop | Influencer commission costs, VAT on digital marketplace sales, rapid payout cycles |
| WooCommerce and BigCommerce | Integration with Xero or QuickBooks, payment gateway reconciliation, hosting and plugin costs |
What HMRC Changes Are Affecting Ecommerce Businesses in 2026 and 2027?
Several significant legislative changes are coming that every UK ecommerce seller should be aware of right now: April 2026 | MTD ITSA Phase One Sole traders with income over £50,000 must begin quarterly digital reporting to HMRC under Making Tax Digital for Income Tax Self Assessment. This replaces the single annual Self Assessment return for those above the threshold. You need compatible software and correct bookkeeping records from day one of your accounting period.
April 2027 | MTD ITSA Phase Two The income threshold drops to £30,000, bringing a much larger group of sole trader ecommerce sellers into mandatory quarterly reporting. If you are currently below £50,000 but growing, this will almost certainly apply to you.
June 2025 | Marketplace VAT Liability Update HMRC confirmed that online marketplaces are now liable for VAT on all goods sold by overseas businesses that are located in the UK at the point of sale, regardless of the order value. Marketplaces must take reasonable steps to verify whether sellers are UK-established and retain evidence of those checks.
Ongoing | HMRC Data-Sharing Powers HMRC has been collecting sales data directly from digital platforms including eBay, Etsy, Amazon, and Vinted since January 2024. If you are selling online and have not declared that income, HMRC may already hold the data. Speaking to a specialist accountant now is far less costly than dealing with an HMRC enquiry later.
Why Choose GM Professional Accountants for Your Ecommerce Business?
GM Professional Accountants is an AAT-regulated practice founded by Sharaz Zaman, with experience since 2012 working with London and Essex businesses. We serve clients across London and Essex from offices in Ilford, Wimbledon, Old Street, and East London. We are not a generalist firm that occasionally works with an online seller. Ecommerce accounting is a core part of what we do, and we have built our processes around the platforms, the reporting formats, and the HMRC obligations that online sellers face every day. Our clients get a named accountant who knows their business, fast responses to queries, and proactive advice before deadlines arrive rather than after them. Whether you are just starting out on Etsy or running a seven-figure Shopify store, our team scales with you. Frequently Asked Questions
Do I need an accountant for my ecommerce business? Yes, particularly once your turnover is growing. VAT registration, platform payout reconciliation, import duty, MTD compliance, and corporation tax planning are all areas where specialist advice pays for itself many times over. HMRC scrutiny of online sellers has increased significantly since 2024, making professional advice more important than ever.
When do I need to register for VAT as an ecommerce seller? UK-based sellers must register for VAT once their taxable turnover exceeds £90,000 in any rolling 12-month period. You must register within 30 days of exceeding the threshold. Overseas sellers storing goods in UK fulfilment centres must register before their first taxable sale, with no minimum threshold. Failure to register on time results in backdated VAT liability plus penalties and interest.
What is Making Tax Digital and how does it affect my online shop? Making Tax Digital for Income Tax (MTD ITSA) requires sole trader ecommerce sellers earning over £50,000 to file quarterly digital income reports to HMRC from April 2026. The threshold falls to £30,000 from April 2027. You will need compatible bookkeeping software and a clean record of income and expenses from every platform you sell on. We prepare all our sole trader ecommerce clients for this ahead of the deadline.
Can I claim tax relief on ecommerce business expenses? Yes. Allowable expenses include marketplace fees, packaging, stock purchases, storage and fulfilment costs, software subscriptions, advertising spend, photography and design costs, a proportion of home office costs if you work from home, and postage. Claiming all allowable deductions reduces your taxable profit directly. Our team ensures no legitimate deduction is missed.
Does HMRC know about my online sales? Yes. From January 2024, digital platforms operating in the UK including eBay, Etsy, Amazon, Vinted, and others have been required to report seller income data directly to HMRC. If you are selling online and have not declared that income on your tax return, HMRC may already hold the data. Voluntary disclosure before HMRC contacts you results in significantly lower penalties than waiting to be investigated.
How do I choose the right accounting software for my ecommerce business? The right software depends on your platform mix and complexity. Xero and QuickBooks are the two most widely used cloud accounting tools for UK ecommerce businesses and both integrate directly with platforms like Shopify, Amazon, and Etsy via third-party connectors. We advise our clients on the best setup for their specific combination of sales channels and ensure it is MTD-compliant from day one.
Ready to Sort Your Ecommerce Accounts? Book a free consultation with GM Professional Accountants. We serve ecommerce businesses across London and Essex from offices in Ilford, Wimbledon, Old Street, and East London.
Written and reviewed by the GM Professional Accountants Team | AAT-Regulated Practice | London and Essex GM Professional Accountants serves clients across Ilford, Wimbledon, Old Street, East London, and Essex. This content is for general information purposes only and does not constitute tax advice. Please consult a qualified accountant for guidance specific to your circumstances.
