Last reviewed: 8 August 2026
Quick summary
- HMRC gives the example of an electrician who is also a driving instructor: each is a separate business with its own digital records and quarterly update.
- For the MTD entry test, qualifying self-employment and property income is considered in total before expenses. Do not test each trade in isolation.
- Build two clean income-and-expense views first, then use one personal year-end checklist to bring the position together.
Part of Making Tax Digital by business type.
Direct answer
If you genuinely run two separate sole-trader businesses, keep a digital record set for each one and send a quarterly update for each. HMRC's own example is someone who works as an electrician and a driving instructor. They need one record set for the electrical work and another for the driving-instruction work, followed by separate quarterly updates.
That does not mean you become two people for tax purposes or automatically have two completely separate annual returns. It means the business-level information should remain identifiable. The annual picture still needs to bring together the income sources, any employment income and other relevant items. The practical risk is less about the number of submissions and more about losing the trail between a transaction and the business it belongs to.
First decide whether you have two businesses rather than one business with different jobs, clients or services. That classification can turn on the way the activities are run, marketed, contracted and recorded. An accountant can help where the answer is not obvious; do not force a split just because it looks tidier in software.
What should stay separate?
Separate does not simply mean separate bank accounts. It means you can explain the commercial story of each activity without borrowing evidence from the other one. A driving instructor may have lesson income, a pupil booking system, instructor insurance and dual-control car costs. An electrician may have job invoices, materials, subcontractor costs and trade insurance. If a single card or bank account is used, that is manageable only when every transaction is labelled and supported clearly enough to rebuild the two ledgers.
Start with the income route. Give each trade its own sales prefix or reference: for example, DI- for lessons and EL- for electrical work. Use two income categories, two customer lists and, where useful, two separate invoice templates. Then consider expenses. Some costs are clearly trade-specific, while a phone, general accounting subscription or home office may be shared. Do not duplicate a shared cost in both businesses. Keep one note saying what the cost is and why it has been allocated in a particular way.
Qualifying income for MTD is not your profit and it is not a per-business allowance. HMRC's current guidance uses total qualifying self-employment and property income before expenses. So a GBP 34,000 trade and a GBP 22,000 trade may put someone over a relevant threshold even though neither number alone does. Check the current GOV.UK threshold and start-date guidance before acting because the rollout dates and thresholds are time-sensitive.
A two-business MTD control sheet that actually works
Create a one-page monthly control sheet with two columns: Business A and Business B. For each, list gross sales, refunds or credit notes, cash received, banked payments, unpaid invoices, expenses recorded, missing receipts and the software status. Add a third, personal column for questions that must not be mixed into either business, such as PAYE, savings interest or a property income source.
At the end of each month, reconcile each column back to its evidence. Your electrical-work column might say: three invoices issued, one supplier refund, materials receipt missing. Your lesson column might say: fourteen card payments from a booking platform, one cash lesson, one cancelled lesson refunded. That is much more informative than one line saying "self-employed income".
At each MTD update point, check that both businesses cover the same update period, that transactions are not sitting in the wrong file, and that any adjustment is retained as a note rather than silently overwriting the original entry. Quarterly updates are cumulative for the tax year, so good monthly discipline makes the quarter less dramatic. Keep the original report from a booking platform or payment processor if it explains a difference between sales and the bank.
Three situations that need different handling
- Electrician and driving instructor: use separate sales and expense records. A part purchased for an electrical job does not belong in the lesson business, while instructor car costs need their own evidence and method.
- Photographer and wedding-stationery seller: the activities may share a website and a payment processor, but separate order references, product costs, shoot invoices and refunds mean the accountant can see whether there are one or two businesses and keep records usable either way.
- Builder with a small online tool-resale activity: do not treat every bank receipt as construction turnover. Retain marketplace statements, stock-purchase evidence and a note explaining whether the online activity is a genuinely distinct trade or incidental sales.
The decision is not a branding exercise. Preserve the facts that explain the activity, income route and expenses behind each figure. It also makes quote comparisons more meaningful because a bookkeeper can see the real reconciliation work involved.
Records to gather before setting up the workflow
- One recent month of invoices or booking-platform reports for each activity.
- Bank and card-processor statements, marked with the business each receipt belongs to.
- Expense receipts split into trade-specific costs and genuinely shared costs.
- Contracts, terms, website pages or marketing material that describe each activity.
- Refunds, deposits, credit notes and unpaid-invoice reports.
- Your latest Self Assessment return and any HMRC MTD letter.
- A list of software, subscriptions and bank accounts currently used.
Do not send an accountant a folder named "two businesses" with no labels. Name files with the trade, period and source, such as Driving lessons - July 2026 - booking export. That small habit makes it possible to audit a quarter without guessing.
Common mistakes with two businesses
The first mistake is treating the net amount received in one bank account as the whole record. A booking platform can deduct its fee before payment; a payment processor can delay a settlement; a refund can relate to an earlier sale. Save the report that bridges gross sales, fees, refunds and the bank payout.
The second is splitting a shared cost twice because both businesses use it. Make one documented allocation rather than entering the same phone, software or home-office amount twice. The third is assuming two client types automatically mean two businesses. A consultant may provide different services within one trade; another person may run two genuinely different activities. Record the facts and ask the accountant to confirm the treatment where it affects reporting.
Questions to take to an accountant
- Do these activities need separate MTD digital records and separate quarterly updates?
- What facts support treating them as separate businesses, or as one wider trade?
- How should I allocate the software, phone, vehicle or home-office costs used by both?
- Can one MTD-compatible package handle both businesses clearly, or should I use two files?
- What should my monthly control sheet show before you review the quarter?
- How do my combined self-employment and property income affect my MTD start date?
Useful related guides
Key takeaway
Two sole-trader businesses can mean two sets of MTD records and two quarterly updates, while the MTD entry test looks at qualifying income in total. Build the separation into your invoices, platform reports, expense notes and monthly reconciliations now, then take the resulting control sheet to an accountant before the first filing.
Official sources checked on 8 August 2026
Frequently asked questions
Do I send separate MTD quarterly updates for two sole-trader businesses?
If they are separate self-employment businesses, HMRC's digital-record guidance says to create one record set for each and send a separate quarterly update for each.
Does that mean two Self Assessment returns?
The business records and updates can be separate while your annual personal tax position is brought together. Keep the activities clearly documented and ask an accountant how they should be reported in your circumstances.
Can one bank account be used for both businesses?
It is possible, but the evidence must still show which business each receipt and expense belongs to. Separate accounts or clearly labelled transactions reduce the reconciliation work.