MTD for Sole Traders: Everything You Need to Know for 2026

MTD for Sole Traders: Everything You Need to Know for 2026

If you're self-employed and earning more than £50,000 a year, Making Tax Digital for Income Tax (MTD for ITSA) becomes mandatory for you from 6 April 2026. That's not a distant government plan — it's this tax year. Here's everything you need to know as a sole trader.

Do You Qualify?

You're in scope for MTD from April 2026 if:

• You're self-employed (sole trader) or receive rental income
• Your qualifying income exceeds £50,000 (gross, before expenses)

Qualifying income includes all self-employment income and property income combined. If you have a side business alongside a PAYE job, only the self-employment and property portions count towards the threshold.

Not sure if you qualify? Check your 2024/25 Self Assessment return. Look at the total of your self-employment and property income boxes before deducting expenses. If it's above £50,000, you're in.

What Counts as Digital Records?

HMRC requires you to keep digital records of every business transaction, including:

• Date, amount, and category of each transaction
• Income from all sources (sales, invoices, other receipts)
• Expenses by category (travel, materials, office costs, etc.)

The records must be held in MTD-compatible software — or in a spreadsheet connected to HMRC via bridging software. The critical rule is that there must be a digital link from your records to HMRC. You cannot manually retype figures from a paper notebook or an unconnected spreadsheet into submission software.

Spreadsheets vs Accounting Software

You do not have to buy accounting software like Xero or FreeAgent. HMRC explicitly allows spreadsheets, provided they connect to HMRC through a digital link (bridging software).

Here's the practical difference:

• Full accounting software (FreeAgent, Xero, QuickBooks) — handles everything from invoicing to MTD submission. Best if you want an all-in-one solution and don't mind changing your workflow.
• Spreadsheet + bridging software — you keep your existing Excel or CSV records and use a bridging tool to submit quarterly updates. Best if you're comfortable with spreadsheets and don't want to migrate years of data.

Most sole traders who already use spreadsheets find the second option less disruptive. The challenge is making sure your spreadsheet data is clean, consistently categorised, and in the right format for the bridging tool.

The Quarterly Update Process

Each quarter, you'll submit a summary of your year-to-date income and expenses. For the 2026/27 tax year:

• Q1 (6 April – 5 July) — submit by 7 August 2026
• Q2 (6 July – 5 October) — submit by 7 November 2026
• Q3 (6 October – 5 January) — submit by 7 February 2027
• Q4 (6 January – 5 April) — submit by 7 May 2027

After Q4, you'll file a final declaration by 31 January 2028, where you make year-end adjustments and claim reliefs. This replaces your traditional Self Assessment return.

Quarterly updates are cumulative — each one shows year-to-date figures, not just that quarter's activity. They're simpler than a full tax return, but your data still needs to be accurate and properly categorised.

Key Deadlines

• 6 April 2026: MTD for ITSA goes live for income above £50,000
• 7 August 2026: First quarterly update due
• 31 January 2028: Final declaration for 2026/27
• April 2027: Threshold drops to £30,000 (more sole traders pulled in)
• April 2028: Threshold drops to £20,000

Common Mistakes to Avoid

• Waiting until the first deadline. Your Q1 data starts accumulating from 6 April 2026. If you haven't set up your digital records by then, you'll be playing catch-up.
• Assuming your spreadsheet is ready as-is. Most spreadsheets have inconsistent categories, missing data, or formatting issues that bridging software can't handle. Test your workflow before the deadline.
• Confusing bridging tools with data preparation. Bridging tools submit data to HMRC — they don't clean it. If your spreadsheet has errors, the bridging tool submits those errors.
• Ignoring the cumulative nature of updates. If Q1 has errors, they carry forward into Q2, Q3, and Q4. Catching mistakes early saves significant time later.

If you're a spreadsheet user looking to get your data MTD-ready without changing your workflow, TaxPrepUK transforms messy spreadsheets into clean quarterly summaries that bridging tools can accept — entirely in your browser.

For a broader overview of MTD, see our plain English guide to Making Tax Digital. And if you're not sure whether your current spreadsheet meets the digital records requirement, read why your spreadsheet isn't MTD-ready (yet).