Do I Need an Accountant for My Mail Order Business?
Starting a mail order business can be an exciting venture, whether you're selling clothing, gifts, beauty products or household goods. But while managing orders and keeping customers happy might be second nature, dealing with business expenses, VAT, bookkeeping and tax returns can be a little more complicated.
So, do you need an accountant for your mail order business? And should you speak to one before registering your company with Companies House?
Here's what UK mail order and online retail business owners need to know.
Do I legally need an accountant for my mail order business?
No, there's no legal requirement to hire an accountant to run a mail order business in the UK.
However, you are responsible for keeping accurate financial records, reporting your income correctly and meeting your tax obligations.
If you're operating as a limited company, this includes preparing annual accounts, filing a Company Tax Return and meeting Companies House requirements. Sole traders have different reporting obligations, including Self Assessment where applicable.
Although you can manage these responsibilities yourself, many mail order business owners choose to work with an accountant to help them stay organised, understand their finances and avoid costly mistakes.
After all, running a successful retail business involves more than simply knowing how much money is coming in.
Should I find an accountant before or after registering my retail mail order business with Companies House?
Ideally, it's worth speaking to an accountant before registering your mail order business as a limited company.
When registering a company with Companies House, you'll need to select a Standard Industrial Classification (SIC) code that describes your business activities.
For many mail order and online retail businesses, the relevant code has traditionally been:
SIC code 47910 – Retail sale via mail order houses or via Internet.
This classification covers businesses selling products through mail order or online channels, rather than primarily through physical shops. You should check the current Companies House SIC code list when registering, as classifications can change.
But choosing the correct SIC code is only one consideration.
Before registering, an accountant can help you understand:
- Whether operating as a sole trader or limited company is more appropriate.
- How Corporation Tax and personal tax might affect your earnings.
- What expenses your mail order business may be able to claim.
- Whether you need to register for VAT.
- How to set up bookkeeping and accounting software from day one.
- What your ongoing filing and reporting responsibilities will be.
Already registered your mail order business? That's absolutely fine. An accountant can still help you get your finances organised, review your current processes and make sure you're meeting your obligations.
What expenses can a mail order business claim?
This is one of the most common questions online retailers ask accountants.
Mail order businesses often have a wide range of expenses, and understanding which ones are allowable for tax purposes can make a real difference to how accurately your profits are calculated.
Depending on your circumstances, allowable business expenses may include:
However, not every purchase can simply be deducted from your tax bill.
For example, stock that's still sitting in your warehouse at the end of your accounting period generally needs to be considered when calculating your cost of sales. Equipment purchases may also receive different tax treatment depending on the circumstances.
An accountant who understands retail and mail order businesses can help ensure expenses are recorded correctly and that you're claiming the tax reliefs available to your business.
Do mail order businesses need to register for VAT?
Not necessarily.
In the UK, businesses generally need to register for VAT when their VAT-taxable turnover exceeds £90,000 over a rolling 12-month period, or when they expect it to exceed that amount in the next 30 days alone.
You can also choose to register voluntarily if your business is below the threshold.
For mail order businesses, VAT can become particularly complicated when selling through multiple online platforms, importing goods or supplying customers overseas.
An accountant can help you understand when VAT registration is required, how VAT applies to your products and what records you need to maintain.
Can I do my own bookkeeping for a mail order business?
Yes, and many smaller retailers start by managing their own bookkeeping.
However, as your business grows, keeping track of sales, refunds, stock purchases, platform fees and delivery charges can become increasingly time-consuming.
For example, if a customer pays £100 through an online marketplace, you might only receive £88 into your bank account after platform fees and other deductions.
Recording that £88 simply as sales income could mean your accounts don't accurately reflect the original sale and associated charges.
Using accounting software such as Xero, alongside professional bookkeeping support, can help you understand your actual sales, costs and profitability.
It's particularly useful when you're selling through multiple channels, such as your own website, Amazon and eBay.
What tax returns does a mail order business need to file?
The tax returns and financial reports you need to submit will depend on how your business is structured.
If you're running a limited company, your responsibilities will generally include:
- Filing annual accounts with Companies House.
- Submitting a Company Tax Return (CT600) to HMRC.
- Paying Corporation Tax on taxable company profits.
- Submitting VAT returns if VAT registered.
- Managing PAYE reporting if you employ staff or operate a payroll.
If you're operating as a sole trader, you'll generally report your business income and expenses through Self Assessment, provided you're required to submit a tax return.
You may also need to comply with Making Tax Digital for Income Tax, depending on your qualifying income and when the rules apply to you.
An accountant can help you understand which deadlines apply to your business, prepare the necessary returns and ensure you're reporting the correct figures.
Can an accountant help my mail order business become more profitable?
Absolutely. An accountant can offer much more than tax return preparation.
For example, you might be generating £20,000 in monthly sales, but how much of that is actually profit once you've accounted for stock, postage, advertising, marketplace commissions and other running costs?
Understanding these figures can help you make better business decisions.
At Blue Rocket Accounting, we help business owners understand their financial position, manage cash flow and identify opportunities to improve profitability.
Whether you're considering investing in more stock, expanding your product range or employing your first member of staff, having accurate financial information makes those decisions easier.
How much does an accountant cost for a mail order business?
The cost of hiring an accountant will depend on your business structure, turnover, transaction volumes and the services you need.
For example, a small mail order business that needs annual accounts and tax return support will have different requirements from an established online retailer managing VAT, payroll and hundreds of monthly transactions.
At Blue Rocket Accounting, we offer transparent, fixed monthly pricing, so you'll know what you're paying for.
We also provide unlimited client support, meaning you can ask questions throughout the year without worrying about being charged every time you pick up the phone.
Looking for an accountant for your mail order business?
Whether you're just starting your mail order business, have recently registered with Companies House or are looking to switch accountants, we're here to help.
At Blue Rocket Accounting, we work with business owners across Dartford, Kent, South East London and beyond, helping them manage their accounting responsibilities while focusing on growing their businesses.
Our dedicated teams can help with bookkeeping, VAT, Corporation Tax, annual accounts, payroll and ongoing financial advice.
Not sure what accounting support your mail order business needs? Just ask us.
We'd be happy to have a chat, answer your questions and provide a free, no-obligation quote based on your business requirements.
Call us on 01322 555442 or email happytohelp@bluerocketaccounting.com.
Disclaimer: This article was correct at the time of publishing, 4th November 2026. This article is intended as general guidance only and does not constitute professional tax or accounting advice. Tax rules and allowances may change, and individual circumstances vary. We recommend speaking with a qualified accountant for advice tailored to your business.
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