VAT for online sellers: what to check before submitting your VAT return

Selling online can feel simple at the start. A customer places an order, you dispatch the product, the money reaches your account and the business keeps moving. But once VAT is involved, the numbers behind those sales need much closer attention.

If you sell through your own website, Amazon, eBay, Etsy, TikTok Shop, Shopify or several platforms at once, your VAT return can quickly become messy. Sales reports, refunds, marketplace fees, postage, imports and stock purchases all need to be treated correctly before you submit anything to HMRC.

That does not mean VAT has to become stressful. It simply means you need a proper check before every return. If you are unsure, working with a VAT return accountant can help you avoid mistakes before they become expensive.

Check whether your sales figures are complete

Start with your total sales. This sounds obvious, but online sellers often miss sales because income comes from several places.

You may have:

• Website sales through Shopify, WooCommerce or another platform
• Marketplace sales from Amazon, eBay or Etsy
• PayPal, Stripe, Clearpay or Klarna receipts
• Manual bank transfers
• Refunds and cancelled orders
• International sales
• Wholesale or business-to-business orders

Before submitting your VAT return, your sales in your accounting software should match your platform reports and bank receipts. If your system only records the payout that reaches your bank, you may be missing the gross sale value, marketplace fees and VAT breakdown.

This is one of the most common VAT return problems for online sellers. The amount paid into your bank is not always your sales figure. It may already have had fees, refunds or adjustments deducted.

Check the VAT rate on your products

Most goods and services in the UK are standard-rated at 20%, but not everything follows that rule. Some items may be zero-rated or reduced-rated, depending on what you sell.

For example, children’s clothing and many basic food items can be zero-rated, while most general retail products are standard-rated. If you sell a mixture of products, you should not assume the same VAT rate applies to everything.

This is especially important if you sell bundles. A product bundle may include items with different VAT treatments, so the VAT position needs reviewing properly. Getting this wrong can mean you either overpay VAT or underpay HMRC.

If your products have changed during the quarter, check whether your VAT settings were updated in your sales platform and accounting software.

Check marketplace VAT reports carefully

Online marketplaces can make VAT more complicated because the platform may provide several reports: sales, fees, VAT invoices, refunds, advertising costs and marketplace tax reports.

Do not rely on one report without checking what it actually includes. Some reports show gross sales. Some show net payouts. Some include VAT collected by the marketplace in certain situations, especially where overseas goods or overseas sellers are involved.

For UK online sellers, the key point is simple: your VAT return should reflect the correct sales value, output VAT and input VAT. If you are using Amazon, eBay or other platforms, keep the marketplace VAT reports with your records, not just the bank deposit.

Professional VAT return filing services can be useful here because they can review the reports before the return is submitted.

Check refunds, returns and cancelled orders

Online sellers often deal with regular returns. Customers may send products back, orders may be cancelled before dispatch, or you may issue partial refunds for damaged goods.

These need to be reflected correctly in your VAT return. If you charged VAT on the original sale and later refund the customer, your records should show the adjustment clearly.

Make sure you check:

• Full refunds
• Partial refunds
• Replacement orders
• Cancelled orders
• Chargebacks
• Returned stock
• Platform adjustments

If your accounting software imports sales automatically, check that refunds are also imported correctly. A sales feed that brings in income but misses refunds can overstate your VAT liability.

Check postage, delivery and packaging

Delivery charges can catch online sellers out. The VAT treatment of postage and delivery can depend on how the charge is made, what is being supplied and whether it follows the VAT treatment of the goods.

If you charge customers for delivery, make sure the VAT has been handled correctly in your checkout and accounts. Also check your courier invoices and packaging costs, as these may include input VAT you can reclaim if the purchase is for your VAT-registered business and you hold valid VAT evidence.

For growing sellers, this is where good bookkeeping matters. If postage labels, packaging supplies and courier costs are not recorded properly, your VAT return may not show the full input VAT you are entitled to claim.

If you need joined-up support, Asmat’s VAT accountants services can help you keep your VAT records clearer throughout the year.

Check import VAT and overseas purchases

Many online sellers buy stock from overseas suppliers. If you import goods into the UK, you may have import VAT, customs duty and shipping charges to deal with.

Before submitting your VAT return, check whether you have the right import VAT evidence. This may include postponed VAT accounting statements, import documents, supplier invoices and freight invoices.

Do not claim VAT just because you paid a supplier. You need proper VAT evidence, and overseas supplier invoices do not always work in the same way as UK VAT invoices.

If you buy stock in US dollars, euros or another currency, make sure the values are recorded correctly in pounds sterling. Exchange rate errors can affect both your profit and your VAT figures.

Check marketplace fees and advertising costs

Selling online usually comes with platform costs. Amazon referral fees, eBay fees, Etsy fees, payment processing charges and sponsored advertising costs can all affect your accounts.

Some of these costs may include VAT. Some may involve reverse charge VAT if the supplier is based overseas. That means you need to check the invoice, not just the bank payment.

Before submitting your return, review your main platform charges and make sure they have not been posted as simple bank charges without VAT treatment. If you use QuickBooks, a certified QuickBooks accountant can help make sure these transactions are categorised properly.

Check your Making Tax Digital records

VAT-registered businesses usually need to keep digital VAT records and submit VAT returns using Making Tax Digital compatible software. This means your records should not just be a last-minute spreadsheet put together from bank statements.

Your digital records should show your sales, purchases, VAT rates, VAT charged, VAT reclaimed and adjustments. If you use software such as QuickBooks, Xero or similar platforms, make sure your bank feeds are reconciled and your sales channels are connected properly.

Asmat offers VAT returns services that can help you file through compliant software and keep your return process more organised.

Check the VAT deadline and payment amount

Most VAT returns are due 1 calendar month and 7 days after the end of the VAT period. This is also usually the payment deadline.

Before submitting, check:

• The VAT period is correct
• All sales and purchases are included
• The VAT due agrees with your accounting records
• Any previous VAT payments or repayments are not duplicated
• The payment can reach HMRC on time

Late VAT returns and late payments can lead to penalties and interest, so it is better to review everything early rather than rushing on the deadline day.

If cash flow is tight, do not ignore the VAT bill. Speak to your accountant early so you can understand your options.

Check your business structure and wider tax position

Your VAT return is only one part of your business finances. If you are a sole trader, your online selling profits may also affect your Self Assessment tax return. If you run a limited company, your VAT records should also tie in with your company accounts and corporation tax position.

If you are self-employed and selling online as your main business, an accountant for sole trader can help you keep your VAT, bookkeeping and tax return records in one place.

You may also need help with personal tax if your online selling income sits alongside employment income, rental income or other earnings. In that case, tax return accounting services can help you report everything correctly.

Keep evidence for every VAT claim

You should keep proper records for your sales and purchases. This includes invoices, receipts, platform reports, import documents, VAT invoices, credit notes and bank records.

For online sellers, the challenge is that evidence can sit in many different systems. It may be in your Shopify dashboard, Amazon Seller Central, eBay account, PayPal account, email inbox, accounting software and bank account.

Try to keep a monthly routine. Download your statements, save your VAT invoices and reconcile your accounts before the quarter ends. This makes your VAT return much easier and reduces the risk of missing important figures.

If you want more support from vat accountants, it is better to ask before the return is due, not after HMRC has raised a query.

Common VAT mistakes online sellers should avoid

Online sellers often make the same mistakes because their systems are moving quickly. Watch out for:

• Recording only net marketplace payouts as sales
• Forgetting refunds and returns
• Using the wrong VAT rate on products
• Claiming VAT without a valid VAT invoice
• Missing import VAT evidence
• Treating all platform fees the same
• Not reconciling sales reports to bank receipts
• Submitting VAT returns before checking stock and purchase records
• Leaving MTD records until the last minute
• Not asking for advice when selling outside the UK

These mistakes may seem small, but across a busy quarter they can make a real difference to how much VAT you pay.

When should you get help?

You should consider getting help if your sales channels are growing, your VAT return no longer feels straightforward, or you are spending too much time trying to understand platform reports.

You may also need help if you sell internationally, import stock, use multiple payment providers, sell both VATable and zero-rated products, or have fallen behind with bookkeeping.

Asmat & Co works with sole traders, limited companies and growing businesses across Slough, Reading and beyond. If you want local support from chartered accountants in Slough, you can get practical advice before your VAT return is submitted.

You can also speak to vat specialist accountants if you want someone to review your records, prepare your return and help you avoid common online selling VAT errors.

FAQs

Do I need to register for VAT if I sell online?

You need to register for VAT if your taxable turnover goes over the UK VAT threshold, which is currently £90,000. You can also register voluntarily if your turnover is below this amount, but you should take advice first because it affects your pricing, invoices and VAT returns.

Do online sellers pay VAT on all sales?

Not always. It depends on whether you are VAT registered, what you sell, where your customers are based and whether the goods are standard-rated, reduced-rated, zero-rated, exempt or outside the scope of VAT. Most ordinary retail goods are standard-rated at 20%, but there are exceptions.

Does Amazon or eBay pay VAT for me?

In some situations, online marketplaces may be responsible for VAT, especially under specific rules for overseas goods or overseas sellers. However, you should not assume this applies to all your sales. Your VAT records still need to be checked carefully against your marketplace reports.

Can I claim VAT on online seller fees?

You may be able to reclaim VAT on business costs if you are VAT registered and have valid VAT evidence. However, some platform fees may involve overseas suppliers or reverse charge rules, so you need to check the invoice and VAT treatment properly.

What should I check before submitting my VAT return?

Check your gross sales, VAT rates, marketplace reports, refunds, delivery charges, import VAT evidence, platform fees, digital records and HMRC payment deadline. If anything does not match, sort it before submitting the return.

Need help with your online seller VAT return?

VAT can become complicated when you sell across several platforms, deal with refunds, import stock and manage fast-moving sales reports. You do not have to handle it alone.

Asmat & Co Accountants can help you review your records, prepare your VAT return and submit it correctly through Making Tax Digital software. Whether you are a sole trader, limited company or growing ecommerce business, you can get clear, practical support that keeps your accounts organised and your HMRC deadlines under control.

Contact Asmat & Co Accountants today to get reliable VAT support before your next return is due.