Running an online store comes with a long list of costs, from hosting fees to courier charges, and the good news is that most of these can be deducted from your profits before you calculate tax. This guide explains what counts as an allowable expense, how the claiming process works for sole traders and limited companies, and how to keep HMRC on your side.
What Counts as an Allowable Expense
HMRC applies a simple but strict test known as the “wholly and exclusively” rule. A cost only qualifies as an allowable business expense if it was incurred purely for running the business, with no personal benefit attached. If a cost serves both business and personal purposes, such as a mobile phone or home broadband, you can only claim the business proportion, calculated on a reasonable and consistent basis.
Allowable expenses reduce your taxable profit, which in turn lowers the Income Tax or Corporation Tax you owe. Money withdrawn from the business for personal use, such as your own drawings or wages if you are a sole trader, is never an allowable expense.
Common Ecommerce Expense Categories
Ecommerce businesses tend to have a distinctive mix of costs compared with traditional retailers. The main categories HMRC recognises include:
- Stock and materials, meaning goods bought for resale or raw materials used to make products
- Website and platform costs, including hosting, domain registration, Shopify or WooCommerce fees, and app subscriptions
- Marketing and advertising, covering social media ads, email marketing tools, SEO services and influencer partnerships
- Shipping and packaging, such as courier fees, postage, boxes and packing materials
- Payment processing fees charged by providers like PayPal, Stripe or card terminals
- Office costs, including stationery, printing, software licences and IT maintenance contracts
- Staff costs, such as wages, subcontractor payments, pension contributions and employer National Insurance
- Insurance, including public liability and professional indemnity cover for the business
- Professional fees, such as accountancy, bookkeeping and legal advice
- Travel costs linked to the business, calculated using flat mileage rates or actual running costs
Home Office and Use of Home Costs
Many ecommerce sellers operate from home, at least in the early stages, and HMRC allows a proportion of household running costs to be claimed. Sole traders can choose between two approaches: a flat rate based on monthly hours worked from home, or a calculation based on the number of rooms used for business and the hours spent working there.
The flat rate method requires a minimum of 25 hours worked from home per month to qualify, with the allowance rising the more hours are logged. The proportional method involves working out the percentage of your home used for business, then applying that percentage to bills such as electricity, council tax and mortgage interest or rent, while telephone and internet costs can often be claimed on top.
Dual Purpose and Mixed Use Expenses
Where a cost has both a business and personal element, such as a laptop used for order processing and personal browsing, HMRC expects a fair and defensible split. The apportionment should reflect genuine usage, for example by time spent or the proportion of a bill attributable to the business, and this method should be applied consistently across tax years.
Costs with an inherent duality of purpose, such as everyday clothing worn while working, are not allowable even if you would not otherwise have bought them. Protective or specialist clothing required for the business, however, can usually be claimed.
How to Claim as a Sole Trader
If you trade as a sole trader, allowable expenses are deducted from your income on your Self Assessment tax return, specifically within the self employment section (form SA103 for full accounts). You total your allowable costs against your turnover to arrive at your taxable profit, which then determines your Income Tax and Class 4 National Insurance liability.
Sole traders with simpler affairs can use HMRC’s simplified expenses for mileage and home working instead of calculating actual costs, which reduces the administrative burden. Note that if you use the £1,000 tax free trading allowance instead of claiming actual expenses, you cannot also deduct allowable expenses separately, so it is worth comparing which option leaves you better off.
How to Claim as a Limited Company
Limited company ecommerce businesses record expenses through the company’s bookkeeping during the year, and these figures feed into the statutory accounts and the Corporation Tax return, known as CT600. Allowable expenses reduce the profit on which Corporation Tax is calculated.
Directors and employees who pay for business costs personally, for example buying stock or paying for a software subscription from a personal card, should submit an expense claim with receipts attached for reimbursement. If the company is VAT registered, invoices must meet VAT rules so that input VAT can be reclaimed alongside the net expense.
Record Keeping Requirements
Whichever structure you trade under, HMRC requires you to keep evidence supporting every expense claimed. Sole traders must retain records for at least five years after the 31 January submission deadline, though many accountants recommend keeping them for up to seven years as good practice. Limited companies generally need to retain records for six years from the end of the accounting period.
Practical habits that make this easier include using a dedicated business bank account to separate income and costs, capturing receipts digitally through an app as soon as a purchase is made, and using cloud bookkeeping software such as Xero or QuickBooks with automated bank feeds. A short written note explaining any apportionment, such as how you split home office costs, is often enough to satisfy HMRC if it later asks questions.
Capital Allowances and Bigger Purchases
Larger purchases, such as computer equipment, warehouse shelving or a company van, are usually treated as capital expenditure rather than a straightforward running cost. These items may qualify for the Annual Investment Allowance, which lets you deduct the full cost from profits in the year of purchase, subject to the current limit. It is worth checking with an accountant before a large purchase to confirm whether it should be treated as a capital allowance or an immediate expense, since this affects the timing and size of your tax relief.
VAT on Ecommerce Costs
Ecommerce sellers who are VAT registered can generally reclaim the VAT charged on allowable business expenses, provided they hold a valid VAT invoice. This applies to costs such as stock purchases, packaging, platform fees and professional services. Getting VAT treatment wrong on cross border sales or marketplace fees is a common pitfall for online sellers, making accurate bookkeeping especially important.
Common Mistakes to Avoid
Several errors come up repeatedly among ecommerce sellers when claiming expenses. These include claiming the full cost of a mixed use item instead of only the business proportion, failing to keep receipts for smaller purchases that add up over the year, mixing personal and business transactions in the same bank account, and misclassifying capital purchases as day to day running costs. Getting a short professional review before filing can catch missed claims and correct risky entries before HMRC raises a query.
How UK Ecommerce Accountants Can Help
Managing expense claims across stock, platforms, marketing and shipping can quickly become complicated for a growing online store. Our team at UK Ecommerce Accountants specialises in ecommerce bookkeeping and tax, helping sellers claim every allowable expense correctly while staying compliant with HMRC.
- We review your full expense list and identify allowable costs you may have missed, from platform fees to home office claims
- We set up cloud bookkeeping systems such as Xero or QuickBooks with bank feeds tailored to ecommerce transactions
- We handle apportionment calculations for mixed use costs, including home working and vehicle expenses, using defensible methods
- We advise on capital allowances for equipment, vehicles and warehouse fit outs to maximise available relief
- We manage VAT registration, filing and recovery on eligible business costs, including cross border and marketplace sales
- We prepare and file Self Assessment returns for sole traders and Corporation Tax returns for limited companies
- We provide ongoing support throughout the year, not just at year end, so nothing is missed before the deadline
Frequently Asked Questions
What expenses can an ecommerce business claim in the UK?
Common claims include stock, website and platform fees, marketing, shipping and packaging, payment processing fees, staff costs, insurance and a proportion of home office costs.
Can I claim my home office if I run my ecommerce store from home?
Yes, sole traders can use either HMRC’s flat rate for hours worked from home or calculate a proportional share of household bills based on room and time usage.
Do I need receipts for every expense I claim?
Yes, HMRC expects documentary evidence for every claim, and records should be kept for at least five years for sole traders and six years for limited companies.
Can I claim expenses if I use the £1,000 trading allowance?
No, you must choose either the trading allowance or actual allowable expenses, not both, so it is worth comparing which gives a better outcome.
How do I claim VAT on business expenses?
If your business is VAT registered, you can reclaim VAT on allowable expenses provided you hold a valid VAT invoice for each purchase.
Is stock a claimable expense before it is sold?
Stock generally becomes an allowable expense when it is sold, not simply when purchased, so accurate inventory tracking matters for accounting purposes.
