Making Tax Digital for Income Tax is no longer a distant administrative change for higher-earning sole traders. It has applied from 6 April 2026 to many businesses and landlords, and September brings an immediate new risk: HMRC has begun signing up people who should already be using the service but have not enrolled themselves.
For a busy owner-manager, this is not simply a question of ticking an HMRC box. Making Tax Digital changes the rhythm of record keeping, software use and reporting. If you are caught by the rules, you need compatible software, digital records for each relevant business, quarterly updates and an end-of-year tax return completed through that software.
The practical priority this month is to establish whether the rules apply to you, check that HMRC’s information matches your current position and, if you have not yet joined, get control of the process before an automatic enrolment letter lands. Here is the September 2026 checklist for sole traders.
Why September 2026 is a key MTD deadline moment
HMRC says that, from September 2026, it will begin signing up people required to use Making Tax Digital for Income Tax for the 2026 to 2027 tax year if they have not already enrolled. The exercise will happen in stages over the coming months, using information HMRC already holds, principally the income reported on the 2024 to 2025 Self Assessment return. HMRC’s guidance for people it has signed up confirms that it will contact taxpayers after enrolment.
That is an important distinction. September is not a new commencement date: the obligation for the first group began on 6 April 2026. It is the point at which HMRC starts bringing non-enrolled people into the service itself. Waiting for HMRC to act leaves you reacting to records that may not reflect a change since your last return.
When you sign up yourself, or instruct your agent to do so, you can check income sources and current circumstances at the outset. HMRC specifically notes that its automatic sign-up process relies only on information already held and may not include later changes. This matters if you stopped trading, sold a rental property, amended a return or believe an exemption applies.
There is also a practical timing issue. Standard-period users should have sent their first quarterly update for 6 April to 5 July by 7 August 2026. A late enrolment does not remove the need to build records from the start of the tax year. It simply means there is catch-up work to do.
Who must use Making Tax Digital for Income Tax from 6 April 2026?
You must use the service from 6 April 2026 if all the relevant conditions apply. In broad terms, you are an individual registered for Self Assessment, you receive income from sole-trader self-employment, property or both, and your qualifying income is more than £50,000. HMRC bases the first 2026 to 2027 cohort on the qualifying income shown in the 2024 to 2025 return.
“More than” matters. Qualifying income of exactly £50,000 is not above the threshold. Equally, do not confuse turnover with profit. The test is built around gross qualifying income before expenses, not the profit left after materials, travel, wages, mortgage interest or other costs.
The phased rollout will later extend to people with qualifying income above £30,000 from 6 April 2027 and above £20,000 from 6 April 2028. But for September 2026, the urgent population is the first group: sole traders and landlords whose 2024 to 2025 qualifying income was above £50,000 and who are not exempt. The official MTD sign-up guidance is the best place to check the current entry conditions before taking action.
Do not assume that a limited company puts you outside the rules
Company income itself is not sole-trader income. However, a director who also runs an unincorporated consultancy, freelance business or property portfolio may still be within MTD because of those personal income sources. Dividends do not count towards the entry threshold, but sole-trader and property turnover can.
Similarly, a partnership share does not itself count as qualifying income for this purpose. A partner with a separate sole-trader business or personally received property income should assess those sources carefully. MTD eligibility is personal, so business structures and side activities need to be viewed together rather than in isolation.
Qualifying income: calculate the right number
Qualifying income is the combined total of income from self-employment and property before expenses. It can include more than one trade and more than one property income source. It is not a test of taxable profit, total personal income or money left after tax.
Consider a wedding photographer with £41,000 of trading turnover and £14,000 of gross rental income in 2024 to 2025. Their qualifying income is £55,000. Even if substantial camera, marketing, repair and property costs reduce taxable profits sharply, they fall within the first MTD group for 2026 to 2027.
Now consider a consultant with £48,000 of sole-trader turnover, £30,000 of employment income and £8,000 of company dividends. Their qualifying income is £48,000, not £86,000, because employment and dividends are excluded from the MTD threshold calculation. They may not be mandated from April 2026, although they should keep an eye on future thresholds.
HMRC’s detailed qualifying income guidance confirms that PAYE employment income, partnership profit shares, dividends, State Pension and private pension income do not count. It also explains more specialised cases, including jointly owned property, ceased sources, short accounting periods and income linked to trusts.
Check ceased businesses and amended returns
Do not make a quick calculation based only on today’s trading. A property or trade that ceased after the 2024 to 2025 return can still affect the initial test where another self-employment or property source continues. Conversely, a correction to the earlier return that reduces qualifying income below the threshold can change the position, including after the tax year has begun.
Review the actual submitted 2024 to 2025 return, not a rough set of accounts or a bank balance. If your accountant prepared it, ask for confirmation of the qualifying-income figure and a clear statement of whether you should be mandated for 2026 to 2027.
Digital records: what must now happen in your business
MTD does not mean photographing a pile of invoices once a quarter and leaving everything else on paper. A digital record is one created and stored using software that works with Making Tax Digital for Income Tax. For every relevant self-employment or property business, records must capture the amount, date and category of income received or expense incurred.
For a typical sole trader, that means recording sales, takings and fees, then categorising business expenditure in the same broad categories used for Self Assessment. A retailer, tradesperson or consultant should establish a routine that captures transactions as they occur or at least frequently enough to make each quarterly submission reliable.
You must still retain normal supporting evidence, such as invoices, receipts and bank statements. Digital bookkeeping is not a licence to dispose of the evidence behind the entries. HMRC says records must generally be kept for at least five years after the 31 January submission deadline for the relevant tax year. The official digital-records guide also sets out rules for corrections, simplified expenses and mixed business/private costs.
A simple discipline helps: issue invoices from your bookkeeping system, connect the business bank feed where appropriate, upload receipt images promptly and review uncategorised transactions every week. The aim is not perfection after every coffee purchase; it is a current, defensible record set that is ready when an update is due.
Separate businesses need separate attention
If you run two sole-trader activities, keep records that distinguish them. If you let UK properties, HMRC generally treats them together as one UK property business rather than requiring a separate record set for every individual property. But a trade and property income remain distinct sources, each with its own reporting needs.
Small income sources can matter too. There are limited exceptions where income is below the relevant trading or property allowance and was not declared on the preceding return. Do not treat a minor side hustle or occasional rental income as automatically outside the digital-record rules without checking the conditions.
Software: choose for compliance and for how you work
Compatible software is central to the regime. It needs to support digital record keeping, quarterly updates and the annual tax return process. Existing accounting software may be adequate, but “I already use software” is not the same as “my software supports MTD for Income Tax.” Confirm compatibility directly with the provider and compare products using HMRC’s commercial software listings.
Choose based on your real workflow. A mobile-first trades business may value receipt capture, bank feeds and simple invoicing. A consultant with project income may need better customer tracking. A landlord may prioritise property-specific expense categories. If an accountant maintains the books, agree who enters transactions, who checks coding, who sends updates and who finalises the annual return.
Using more than one product is possible, but the records and submission process need digital links. Manually copying figures from a spreadsheet to another system after a record has been submitted is not a sound compliance process. Test the full journey before the next update: transaction entry, bank reconciliation, quarterly totals, HMRC authorisation and submission confirmation.
Quarterly updates: four summaries, not four tax returns
Every three months, compatible software aggregates your digital records into totals for income and expense categories. These quarterly updates are summaries, not final tax returns. You do not need to make every year-end accounting or tax adjustment before submitting one. Instead, record the underlying transactions accurately and use the end-of-year process to complete outstanding adjustments, reliefs and other income details.
For standard update periods, the deadlines are:
- 7 August for the period from 6 April to 5 July;
- 7 November for 6 April to 5 October;
- 7 February for 6 April to 5 January; and
- 7 May following the end of the tax year for 6 April to 5 April.
Each update is cumulative from the beginning of the tax year to the end of that period. This is useful: if you find a missing April expense in October and correct the digital record, the next update can reflect the correction without resubmitting previous quarters. HMRC’s quarterly-update guidance explains the standard and optional calendar periods in detail.
If your accounts run to 31 March, calendar update periods may make administration easier. However, select them in software before your first quarterly update; once an update has been sent, you cannot switch period type for that tax year.
Your September 2026 action checklist
- Check the 2024 to 2025 return. Add gross self-employment and property income before expenses. Identify whether the total is more than £50,000.
- Review HMRC’s view of your income sources. List every current trade and property business. Note anything that stopped, started or changed after the return used for the test.
- Decide whether to sign up yourself now. Do not rely on automatic enrolment. Self-enrolment gives you an opportunity to correct the starting position; an authorised agent can also sign up a client.
- Check for an exemption before enrolling. Digital exclusion can apply where it is not reasonable to use compatible software because of age, disability, location or certain religious beliefs. There are also specific transitional exemptions. Read HMRC’s exemption guidance and apply rather than merely ignoring the new process.
- Confirm software capability. Make sure it can handle every relevant source, submit quarterly updates and support the annual return. Agree access, backup and review responsibilities with your bookkeeper or accountant.
- Reconstruct records from the start date. Standard-period businesses need digital records from 6 April 2026; calendar-period businesses need them from 1 April 2026. Reconcile sales, bills, bank entries and receipts before you attempt a submission.
- Catch up on the first update. The 7 August deadline has passed, but records and updates are still required before the annual return can be filed. Do not let a missed first deadline become a missed second deadline on 7 November.
- Put recurring dates in the diary. Schedule a monthly bookkeeping close and a review at least two weeks ahead of each quarterly deadline. Build in time for your accountant to query unusual items.
- Keep cash planning separate from filing. Quarterly updates can give a useful tax estimate, but they do not create four annual Income Tax payment dates. Continue setting money aside for the normal Self Assessment obligations.
Do not mistake the transitional penalty position for permission to delay
There are no penalty points for late quarterly updates in the 2026 to 2027 tax year for people required to join from April 2026. That breathing space should be used to fix systems, not to postpone them. You must still keep digital records and complete the outstanding quarterly updates before submitting the year’s tax return.
Late tax-return and payment consequences still matter. The annual return for 2026 to 2027 must be submitted through compatible software by 31 January 2028, and the normal payment deadline remains 31 January after the end of the tax year. HMRC’s penalties guidance explains the new points-based late-submission system, the transitional treatment for 2026 to 2027 quarterly updates and late-payment charges.
Remember, MTD has not abolished the end-of-year task. You will still check the full-year figures, make adjustments, claim reliefs and allowances where appropriate, add income that has not already been populated and submit a final tax return. The software reduces repetition; it does not transfer responsibility for accuracy away from the taxpayer.
Take control before HMRC does it for you
September 2026 is the moment to move from awareness to action. If your qualifying income exceeded £50,000 in 2024 to 2025, treat MTD as an active operating requirement, not a future project. Check the threshold calculation, verify your current sources, choose suitable software, rebuild any missing digital records and prepare the next quarterly update.
Most importantly, do not wait for an HMRC sign-up notice to discover a gap between its records and your business reality. Speak to your accountant or bookkeeper this week, complete the checklist and make your digital process routine before the 7 November deadline arrives.
