Making Tax Digital for Sole Traders: The 2026 Thresholds, Deadlines and Software Rules

The biggest change to UK self-employed tax reporting in a generation is now live. From 6 April 2026, HMRC Making Tax Digital rules apply to the first wave of sole traders and landlords, and the annual tax return most people have filed for years is being replaced with quarterly digital updates. This guide covers who is caught, the exact deadlines, what the software must do, and the penalties for getting it wrong. Everything here is drawn from gov.uk and HMRC guidance, so you can plan around the rules as they actually stand. This article is general information, not legal or financial advice.

What is Making Tax Digital for income tax?

Making Tax Digital for income tax (often shortened to MTD ITSA) is HMRC's programme to move Self Assessment taxpayers onto digital record keeping and quarterly reporting. Instead of one annual return, mandated taxpayers must keep digital records of business income and expenses, send a summary update to HMRC every quarter through compatible software, and then file a final year-end declaration that confirms the figures and applies reliefs and allowances.

The amount of tax you pay does not change under MTD. What changes is how, and how often, you report. HMRC guidance says the aim is fewer errors and a closer, near-real-time view of what you owe, rather than one January scramble.

The MTD threshold 2026: who is in from April

According to gov.uk, mandation is based on your combined gross income from self-employment and property, before any expenses are deducted. That word gross matters: a landlord with 55,000 pounds of rent and 20,000 pounds of costs is still over the line, because the test looks at income, not profit. The rollout comes in three waves:

If your gross qualifying income is 20,000 pounds or less, you are outside the current mandation plans and carry on with Self Assessment as before. If you are both a sole trader and a landlord, the two income streams are added together for the test, so 30,000 pounds of trade income plus 25,000 pounds of rent puts you in the April 2026 wave.

Making tax digital for sole traders: what actually changes day to day

For a mandated sole trader, three habits change. First, records must be digital: a shoebox of receipts totted up once a year no longer satisfies the rules. Each transaction needs to be recorded in software or on a spreadsheet linked to bridging software. Second, you send a quarterly update summarising income and expenses for the period. Third, the year still ends with a final declaration by 31 January, which is where accounting adjustments, reliefs and other income go.

The quarterly updates are summaries, not four mini tax returns. You are not calculating tax each quarter, and you can correct earlier quarters in a later update. The final declaration is the legally decisive filing, just as the Self Assessment return is today.

Making tax digital for landlords

Making tax digital for landlords works on the same thresholds and the same dates, and the rules for MTD for landlords catch ordinary buy-to-let income, not just trading businesses. Rent from UK property counts towards the gross income test alongside any self-employment. Jointly held property adds a wrinkle: it is your share of the gross rent that counts towards your own threshold. Landlords who have always filed a paper-light annual return will feel the shift most, because rent, repairs, insurance, letting fees and mortgage interest all need to be logged digitally as they happen rather than reconstructed in January.

MTD income tax deadlines

The MTD income tax deadlines follow the tax year quarters. Per HMRC guidance, the standard quarters and their filing dates are:

• 6 April to 5 July: update due by 7 August
• 6 July to 5 October: update due by 7 November
• 6 October to 5 January: update due by 7 February
• 6 January to 5 April: update due by 7 May

After the fourth quarter, the final declaration for the year is due by 31 January, the same date the balancing payment is due. So a 2026/27 trader files quarterly through the year and completes the year by 31 January 2028. You can choose calendar quarters instead of tax-year quarters in your software if month-end bookkeeping suits you better; the deadlines stay the same.

MTD software for sole traders

You cannot file quarterly updates through the old HMRC online return. You need MTD-compatible software, and gov.uk publishes a list of recognised products. Broadly there are two routes. Full bookkeeping packages record transactions and file updates from the same place. Bridging software, by contrast, connects an existing spreadsheet to HMRC's systems, which suits people with simple affairs who want to keep their current workflow. When comparing MTD software for sole traders, check three things: that it appears on the gov.uk recognised list, that it covers both self-employment and property if you have both, and that the price you see includes quarterly filing rather than charging per submission.

MTD software for CIS subcontractors

Subcontractors in the Construction Industry Scheme have an extra moving part: tax is deducted at source from their payments, usually at 20 per cent. MTD does not change CIS itself, but your quarterly updates report your gross income, while the CIS deductions are reconciled in the final declaration, where they are set against your bill and often produce a repayment. If that is you, look specifically at MTD software for CIS subcontractors, meaning products that record CIS deduction statements against invoices as you go. Choosing a package with no CIS handling means keeping a parallel record all year, which is exactly the kind of duplication digital records are meant to remove.

Is Self Assessment ending?

You will see the phrase self assessment ending in headlines, and it is half true. For mandated taxpayers, the single annual Self Assessment return is being replaced by the quarterly-updates-plus-final-declaration cycle. But the underlying regime survives: the same 31 January payment date, the same payments on account, the same reliefs. People below the thresholds, and income types outside mandation, stay on the traditional return for now. Treat it as Self Assessment changing shape rather than disappearing.

Penalties: points first, then 200 pounds

HMRC Making Tax Digital penalties for late submissions run on a points system. Each missed deadline earns a point, and for quarterly filers a 200 pound penalty lands once you reach four points, with further 200 pound penalties for later misses, according to HMRC guidance. There is a soft landing for the first year: HMRC has said late submission penalties will not be charged on quarterly updates during 2026/27. Two cautions, though. The soft landing does not cover the final declaration, and it does not touch late payment penalties, which run on a separate and sharper regime. File on time from quarter one and the whole question disappears.

What to do this quarter

• Work out your gross qualifying income for the most recent full tax year and check it against the 50,000, 30,000 and 20,000 pound waves.
• If you are in the April 2026 wave, confirm you have filed your first quarterly update; the 7 August deadline for quarter one has already passed.
• Pick software from the gov.uk recognised list and get bank feeds or your spreadsheet connected now, not in January.
• Diarise 7 November, 7 February and 7 May, plus 31 January for the declaration and payment.
• If you are below the threshold, note the 2027 and 2028 waves so mandation does not surprise you.