Making Tax Digital for Income Tax: The Complete 2026 Guide for UK Sole Traders
Making Tax Digital for Income Tax Self Assessment (MTD ITSA) is now live for the first wave of UK sole traders and landlords. If your gross income exceeds £50,000, you are required to keep digital records and submit quarterly updates to HMRC starting from April 2026. Here's everything you need to know.
What is Making Tax Digital?
Making Tax Digital (MTD) is HMRC's programme to move the UK tax system online. The goal is straightforward: replace the annual Self Assessment tax return with a system of digital record-keeping and quarterly reporting.
MTD for VAT has been mandatory since April 2022. Now, MTD for Income Tax Self Assessment (MTD ITSA) extends these requirements to sole traders and landlords — the largest group of UK taxpayers yet to be affected.
Under MTD ITSA, you must:
- Keep digital records of all business income and expenses
- Submit quarterly updates to HMRC (every 3 months)
- Submit a final declaration by 31 January each year
- Use MTD-compatible software or approved bridging tools
Who is affected?
MTD ITSA applies to self-employed individuals and landlords — not limited companies (they file Corporation Tax separately).
The mandate is being rolled out in phases based on gross income (your total income before expenses, not profit):
| Start Date | Gross Income Threshold | Estimated Taxpayers |
|---|---|---|
| 6 April 2026 | Over £50,000 | ~780,000 |
| 6 April 2027 | Over £30,000 | ~900,000 additional |
| 6 April 2028 | Over £20,000 | ~1.1 million additional |
If you have both self-employment and rental income, your combined gross income determines your threshold. For example, £30,000 from self-employment plus £25,000 from property income puts you at £55,000 — you're in the Phase 1 group.
The MTD Timeline: 2026–2028
6 April 2026 — Phase 1
Self-employed and landlords with gross income over £50,000 must begin keeping digital records and submitting quarterly updates.
6 April 2027 — Phase 2
Threshold drops to £30,000. An additional ~900,000 taxpayers brought into scope.
6 April 2028 — Phase 3
Threshold drops to £20,000. Most sole traders and landlords now covered.
31 January 2028
First final declarations due for Phase 1 taxpayers (covering tax year 2026–27).
What You Need to Do
1. Keep Digital Records
You must maintain digital records of all business transactions. This means:
- Date, amount, and category for every transaction
- Records must use HMRC-defined categories (SA103 for self-employment, SA105 for property)
- Spreadsheets are acceptable — but must be submitted via MTD-compatible software
2. Submit Quarterly Updates
Instead of one annual return, you'll submit summaries every quarter:
| Quarter | Period | Deadline |
|---|---|---|
| Q1 | 6 April – 5 July | 5 August |
| Q2 | 6 July – 5 October | 5 November |
| Q3 | 6 October – 5 January | 5 February |
| Q4 | 6 January – 5 April | 5 May |
3. File a Final Declaration
After the tax year ends, you submit a final declaration by 31 January — similar to the current Self Assessment return, but your quarterly data is already in the system.
4. Use Compatible Software
All submissions must go through MTD-compatible software. HMRC maintains a list of recognised providers including QuickBooks, Xero, FreeAgent, and others.
Understanding Quarterly Updates
A quarterly update is a summary of your income and expenses for that quarter, categorised using HMRC headings. For self-employment (SA103), the categories include:
- Turnover / other income
- Cost of goods sold
- Wages, salaries, and staff costs
- Car, van, and travel expenses
- Rent, rates, power, and insurance
- Repairs and maintenance
- Phone, fax, stationery, and other office costs
- Advertising and business entertainment
- Interest and bank charges
- Accountancy, legal, and professional fees
- Other allowable business expenses
This is where tools like QuickMaths come in — our AI automatically categorises your bank statement transactions into these exact HMRC categories, saving you hours of manual work each quarter.
Categorise Your Transactions in 30 Seconds
Upload your bank statement and get instant HMRC-aligned expense categorisation. Free, no sign-up required.
Try the Statement Analyzer →Penalties for Non-Compliance
HMRC has confirmed a points-based penalty system for late submissions:
| Offence | Penalty |
|---|---|
| Late quarterly update | 1 penalty point per late submission |
| Reaching threshold (4 points) | £200 fine |
| Each subsequent late submission | Additional £200 |
| Late payment (15+ days) | 2% of tax owed |
| Late payment (30+ days) | Additional 2% |
| Late payment (ongoing) | 4% annualised on outstanding balance |
Points expire after 24 months of perfect compliance. The system is designed to be proportionate — you won't be fined for a single late submission.
Software Options
You need MTD-compatible software to submit your quarterly updates. Here are the leading options for UK sole traders:
We may earn a small commission from partner links. This helps keep QuickMaths free for everyone.
How to Prepare Now
- Check your threshold — Are you over £50,000 gross income? You're in Phase 1.
- Start categorising — Upload your recent bank statements to QuickMaths to see how your transactions map to HMRC categories.
- Choose your software — Pick an MTD-compatible provider and start using it for Q1 2026–27.
- Set up digital records — Begin recording all income and expenses digitally from 6 April 2026.
- Talk to your accountant — If you use one, discuss how MTD changes your workflow.
Not sure where your expenses fall?
Our AI analyses your bank statement and categorises every transaction to HMRC self-employment categories — with confidence scoring so you know what to review.
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