What Is Making Tax Digital for Income Tax and Why Is It the Biggest Change to UK Self Assessment in a Generation?
From 6 April 2026, the way millions of sole traders and landlords report their income to HMRC is changing fundamentally. The change is called Making Tax Digital for Income Tax, often abbreviated to MTD for ITSA (Income Tax Self Assessment), and it represents the most significant overhaul of the UK self-employed tax reporting system in decades.
Under the current system, you file one Self Assessment tax return per year, typically in a rush before the 31 January deadline. Under Making Tax Digital for Income Tax, that single annual return is replaced by a continuous cycle of digital record-keeping and quarterly updates submitted to HMRC throughout the year, followed by a final year-end declaration.
The change does not happen to everyone at once. HMRC is rolling it out in stages based on income. But if you are a sole trader or landlord earning above the relevant threshold, this is coming for you, and the first phase starts in just weeks.
Awareness is dangerously low. Research by IPSE and Sage found that only 30% of sole traders have a clear understanding of what MTD for Income Tax involves. Seven out of ten either have not heard of it or do not realise it requires digital record-keeping and quarterly submissions. HMRC has begun sending warning letters, but many people will not receive theirs until close to the deadline, or after it.
Who Does Making Tax Digital for Income Tax Apply To? The Income Thresholds Explained for Sole Traders and Landlords
Making Tax Digital for Income Tax applies to sole traders and landlords whose combined gross income from self-employment and property exceeds the relevant threshold. The rollout is phased by income level:
Four Critical Details About the Threshold That Many Sole Traders Miss
It is gross income, not profit. The threshold is based on your total turnover before any expenses are deducted. If you earn £55,000 before expenses but only make £30,000 profit, you are still in scope from April 2026.
Self-employment and property income are combined. If you are a sole trader earning £32,000 and also receive £20,000 in rental income, your combined qualifying income of £52,000 takes you above the April 2026 threshold.
HMRC uses your 2024/25 tax return to assess your April 2026 start date. If you have not yet filed your 2024/25 return, do so as soon as possible so HMRC can assess your position correctly.
Limited companies are not affected. Making Tax Digital for Income Tax applies to sole traders and landlords only. Limited companies fall under Corporation Tax rules, which have a separate and later MTD timeline. This distinction is driving many sole traders to consider incorporation.
Who Is Exempt from Making Tax Digital for Income Tax?
Some individuals may be exempt from MTD requirements. HMRC can grant exemptions in specific circumstances including digital exclusion (where using software is not reasonably practicable), certain religious grounds, or where the administrative burden would be disproportionate. Exemptions must be applied for directly with HMRC and are not automatic. If you believe you qualify, apply as early as possible.
What Does Making Tax Digital for Income Tax Actually Require You to Do Differently from April 2026?
The core change is straightforward to understand but significant in practice. Instead of one annual Self Assessment return, you will need to do all of the following each tax year:
- Keep digital records of all income and expenses from your self-employment and property using MTD-compatible software from the very first day of the new tax year, 6 April 2026.
- Submit four quarterly updates to HMRC throughout the year, each covering a three-month period. These are summaries of your income and expenses, not full tax returns. No complex accounting adjustments are required at this stage.
- Add any other income sources to your software once per year. This includes things like employment income (PAYE), savings interest, and dividends, which are not included in the quarterly updates but must be declared in the final step.
- Submit a Final Declaration after your fourth quarterly update and before 31 January. This replaces your current annual Self Assessment tax return and confirms your complete tax position for the year.
- Pay your tax bill by 31 January, exactly as you do under the current Self Assessment system. The payment deadline does not change.
The quarterly updates are not tax returns. They are quick digital snapshots of your income and expenses for the period. No tax is calculated or paid at the quarterly stage. The purpose is to give HMRC a more up-to-date picture of your finances throughout the year and to spread your record-keeping admin rather than leaving it all to January.
Making Tax Digital Quarterly Update Deadlines for the 2026 to 2027 Tax Year: Key Dates for Sole Traders
For those entering MTD from 6 April 2026, here are the four quarterly update deadlines for the first tax year, plus the final declaration deadline:
| Update Period | Period Covered | Submission Deadline |
|---|---|---|
| First quarterly update | 6 April to 5 July 2026 | 7 August 2026 |
| Second quarterly update | 6 July to 5 October 2026 | 7 November 2026 |
| Third quarterly update | 6 October to 5 January 2027 | 7 February 2027 |
| Fourth quarterly update | 6 January to 5 April 2027 | 7 May 2027 |
| Final Declaration (tax return) | Full 2026/27 tax year | 31 January 2028 |
Note: If you prefer to align your reporting periods with the calendar year (ending on the last day of the month), you can opt for calendar quarter periods instead. These end on 31 July, 31 October, 31 January, and 30 April respectively, with deadlines one month and seven days after each period end. You need to set this up in your software before your first update.
No Penalty Points for Late Quarterly Updates in the First Year
HMRC has confirmed that for those joining MTD in April 2026, penalty points will not apply for late quarterly updates during the 2026/27 tax year. This is a grace period to allow new entrants time to adjust. However, penalties still apply for late submission of the Final Declaration (tax return) and for late payment of tax. From the 2027/28 tax year onwards, the full points-based penalty system will apply to quarterly updates as well.
1Office UK helps sole traders assess whether forming a UK limited company makes sense for their situation. We handle the company formation process, registered office, company secretarial obligations, and all ongoing Companies House and HMRC filings from day one.
Talk to 1Office UK about forming a limited company →What MTD-Compatible Software Do Sole Traders Need for Making Tax Digital for Income Tax?
Using HMRC-approved, MTD-compatible software is not optional. It is a legal requirement from the moment you enter the MTD system. You cannot submit quarterly updates or your Final Declaration manually or through the standard HMRC online portal once you are within the MTD regime.
What Must MTD-Compatible Software Be Able to Do?
- Record and store your income and expenses digitally in a format that meets HMRC's requirements.
- Submit quarterly updates directly to HMRC through the MTD application programming interface (API).
- Compile and submit your Final Declaration at the end of the tax year.
- Include any additional income sources (such as PAYE income, dividends, and savings interest) in the Final Declaration process.
Can I Use a Spreadsheet?
Yes, but not on its own. You need bridging software to create a digital link between your spreadsheet and HMRC's systems. A single dedicated MTD software solution is simpler and less error-prone.
HMRC Approved Software
HMRC maintains a full list of compatible software on GOV.UK. Popular options include QuickBooks, Xero, FreeAgent, and Sage. Many have free tiers for basic needs.
Multiple Businesses
If you have more than one self-employment business or both self-employment and property income, you must submit separate quarterly updates for each source, but only one Final Declaration.
Sign Up Before April 2026
You must sign up for MTD through HMRC's online service before your start date. You also need to have submitted a Self Assessment return in the last two years to be eligible to sign up.
Making Tax Digital Penalties for Late Quarterly Updates and Late Payment: What Sole Traders Risk from April 2027
HMRC is introducing a new points-based penalty system specifically for MTD submissions. Understanding how it works is important because it is meaningfully different from the current Self Assessment penalty regime.
| What Triggers a Penalty | How It Works | Financial Consequence |
|---|---|---|
| Late quarterly update | Each missed deadline adds one penalty point to your account. Points accumulate across all missed submissions. | £200 penalty once you reach 4 points. Points reset after a period of full compliance. |
| Late Final Declaration (tax return) | Fixed penalty applies from the day after the deadline. This is separate from the quarterly points system. | £100 immediately, rising with further delay |
| Late payment of tax | Penalty percentage of unpaid tax, starting after 15 days. Interest accrues from day one of late payment. | Approx. 3% of tax owed after 15 days, rising after 30 days |
| Multiple businesses, multiple updates | Each business source has its own submission requirement. Missing one counts as a separate late submission. | Points accumulate faster if you have multiple income sources |
If you are both a sole trader and a landlord, you may need to submit eight quarterly updates per year (four for your trade, four for your property income) plus one Final Declaration. That is nine HMRC submissions per year. Each missed update is a separate point. The risk of accumulating penalty points quickly is significantly higher for people with multiple income sources.
How to Prepare for Making Tax Digital for Income Tax Before April 2026: A Practical Checklist for Sole Traders and Landlords
If your qualifying income is above £50,000 and April 2026 is your start date, here is what you need to do right now:
- Check your qualifying income from your 2024/25 Self Assessment return. This is the figure HMRC uses to determine your April 2026 start date. If you have not yet filed your 2024/25 return, do so as soon as possible.
- Register for Self Assessment if you have not already done so. You must be registered for Self Assessment and have submitted a return in the last two years to sign up for MTD.
- Choose and set up your MTD-compatible software. Check the HMRC approved software list on GOV.UK and start using your chosen software to record income and expenses before your start date.
- Sign up for MTD through HMRC's online service before 6 April 2026. If you use an accountant or tax agent, they can sign you up on your behalf.
- Set reminders for all five annual submission deadlines: four quarterly updates and the Final Declaration. Missing deadlines is the most common and easily avoidable MTD mistake.
- Speak to an accountant or tax agent if you are unsure about any aspect of the transition, especially if you have multiple income sources, are close to the threshold, or are considering whether your current business structure is still right for you under the new system.
1Office UK helps sole traders assess whether forming a UK limited company makes sense for their situation. We handle the company formation process, registered office, company secretarial obligations, and all ongoing Companies House and HMRC filings from day one.
Talk to 1Office UK about forming a limited company →Is Making Tax Digital a Reason to Stop Being a Sole Trader and Form a UK Limited Company?
This is one of the most common questions we are hearing from sole traders as April 2026 approaches, and it is a genuinely important one. Here is the key fact: limited companies are not subject to Making Tax Digital for Income Tax. A limited company files one Corporation Tax return per year. Not four quarterly updates plus a Final Declaration. For sole traders already stretched on time and administration, this difference alone is prompting serious conversations about incorporation.
Beyond avoiding quarterly reporting, there is also a tax efficiency case. At a profit level of £60,000, a sole trader typically pays around £14,300 in combined Income Tax and National Insurance. A limited company director drawing the same income via salary and dividends typically pays around £9,700 in total, a potential saving of over £4,500 per year, even after additional accountancy costs.
MTD Is Not the Only Reason to Consider Incorporation, But It Is a Useful Trigger to Review Your Structure
If you are already thinking about whether a limited company makes sense for your situation, the arrival of MTD is a natural moment to have that conversation. Incorporation is not right for everyone, and the decision involves more than just tax. But for sole traders earning above £40,000 to £50,000 in profit, the combination of lower tax, limited personal liability, and no MTD quarterly reporting makes the case for incorporation stronger than it has been for years.
1Office UK helps sole traders assess whether forming a UK limited company makes sense for their situation. We handle the company formation process, registered office, company secretarial obligations, and all ongoing Companies House and HMRC filings from day one.
Talk to 1Office UK about forming a limited company →
