Making Tax Digital is Here: What Every Sole Trader Needs to Know in 2026

If you're a sole trader in the UK earning more than £50,000 a year, the way you handle your tax has just changed. Not next year. Not eventually. Right now.

From 6 April 2026, Making Tax Digital for Income Tax Self Assessment (MTD for ITSA) is live. It means digital record-keeping, quarterly updates to HMRC, and compatible software. No more shoeboxes of receipts. No more doing it all in one panicked weekend in January.

This is the biggest change to personal tax administration since self-assessment launched in 1996. And if you're reading this thinking "I had no idea," you're not alone. A 2025 survey found that more than one in four affected sole traders were still unaware of the changes.

Let's break down what's actually happening, who it affects, and what you need to do about it.

Who needs to comply?

MTD for ITSA is rolling out in three phases, based on your qualifying income. That's your gross turnover from self-employment and property income combined, before expenses. Not your profit. Your turnover.

This catches more people than you'd expect. If you invoice £55,000 a year but only take home £25,000 after costs, you're still in scope.

Phase 1 (April 2026): Sole traders and landlords with qualifying income above £50,000. HMRC estimates around 864,000 people fall into this group. If this is you, it's already started. Your first quarterly update is due by 7 August 2026.

Phase 2 (April 2027): The threshold drops to £30,000, pulling in roughly another 970,000 taxpayers.

Phase 3 (April 2028): It drops again to £20,000. Below that, compliance is voluntary for now.

One detail that trips people up: self-employment and property income get added together. A freelancer earning £35,000 from their business and £20,000 from a rental property has qualifying income of £55,000 and must comply from April 2026, even though neither income source would trigger it alone.

Partnerships are excluded entirely for now. So are limited companies.

Who's exempt?

HMRC does allow exemptions for people who genuinely cannot use digital tools due to disability, age, remote location, or religious beliefs. But the bar is deliberately high. Not being comfortable with technology or preferring paper doesn't qualify.

What do you actually have to do?

Three things change under MTD.

1. Keep digital records

Every business transaction needs to be recorded digitally: the date, the amount, and the category. You can still use spreadsheets, but only if they're digitally linked to software that submits to HMRC via their API. You can't type numbers from a spreadsheet into a separate submission tool. That manual re-keying is explicitly banned.

For most sole traders, the simplest approach is to use an accounting app that handles everything in one place. More on that in a moment.

2. Submit quarterly updates

Instead of filing once a year, you now submit four quarterly updates through your software:

• Q1 (6 April to 5 July): due 7 August
• Q2 (6 July to 5 October): due 7 November
• Q3 (6 October to 5 January): due 7 February
• Q4 (6 January to 5 April): due 7 May

Each update reports your cumulative income and expenses for the tax year so far. Even if you had no activity in a quarter, you still need to submit.

And here's the part that catches people out: if you have multiple income sources (say, a sole trade and a rental property), you submit separate updates for each. That's eight submissions a year, not four.

3. File a final declaration

At the end of the tax year, you submit a final declaration by 31 January. This replaces the traditional self-assessment tax return. It's where you report all your income (including non-business sources like employment or savings interest), claim any allowances, and confirm your tax liability.

Your tax payment dates stay the same: 31 January and 31 July. The quarterly updates are reporting obligations only. You're not paying tax four times a year.

A small mercy for simpler businesses

If your combined income is below the VAT threshold (currently £90,000), you can use "three-line accounts" in your quarterly updates. That means consolidated income, expenses, and profit totals rather than fully itemised categories. It's a meaningful simplification if you qualify.

Why is the government doing this?

The short answer: HMRC thinks it will close part of the UK's tax gap.

The UK tax gap stood at £46.8 billion in 2023/24, which is 5.3% of all tax that should theoretically be collected. Small businesses account for roughly 60% of that, around £28 billion. HMRC's own random enquiry programme found that 43% of self-assessment business returns contained errors.

The theory behind MTD is straightforward. Digital record-keeping eliminates arithmetic mistakes, transposition errors, and lost paperwork. Software can nudge you toward correct categorisation. Quarterly reporting means errors get caught in-year rather than festering until January. HMRC projects an additional £1.95 billion in tax revenue by 2029/30 as a result.

There's evidence this works, at least partially. MTD for VAT, which has been running since 2019, reportedly reduces error-related losses by around £400 million a year. But the Chartered Institute of Taxation notes it's still hard to say definitively how much of that improvement is down to MTD versus other factors.

The more sceptical view, shared by most professional bodies, is that while digital records are genuinely helpful, the quarterly reporting requirement is administrative overkill that benefits HMRC's data collection ambitions more than it helps small businesses. The ICAEW has been particularly vocal on this point, supporting digitalisation but opposing quarterly submissions.

What happens if you don't comply?

MTD introduces a new points-based penalty system, replacing the old automatic £100 fine for late filing.

Late submission penalties

Every time you miss a quarterly update or final declaration deadline, you receive one penalty point. For quarterly filers, the threshold is four points. When you hit it, you're charged a £200 penalty, and every subsequent late submission costs another £200.

Points expire after 24 months of clean compliance if you're below the threshold. If you're at or above it, you need 12 consecutive months of on-time filing and all outstanding submissions cleared before your points reset.

Late payment penalties

These work differently and are arguably more punishing. After a 15-day grace period (extended to 30 days in the first year), you face:

• 3% of tax owed at day 15
• A further 3% at day 30
• 10% per annum charged daily from day 31

These rates increase from the 2027/28 tax year onwards. Late payment interest also accrues from day one at the Bank of England base rate plus 2.5%.

The first-year soft landing

There is some good news for the first cohort. During the 2026/27 tax year, no penalty points will be issued for late quarterly updates. This gives you time to get your processes sorted without immediately racking up penalties.

But be careful with this. The soft landing only covers late quarterly updates. It does not protect you from penalties on the final declaration or late payments. And it only applies to the first group mandated from April 2026. If you join in April 2027, you face the full regime from day one.

Record-keeping penalties

If HMRC finds you're not maintaining proper digital records or you've broken the digital link between your software systems, they can charge a separate penalty of up to £3,000.

How much does compliant software cost?

You'll need MTD-compatible software. HMRC doesn't provide a full solution, so you're looking at commercial products.

Prices vary significantly. The big names like Xero start from around £7/month, QuickBooks from £10/month, and FreeAgent from £14.50/month (though it's free if you bank with NatWest or RBS). Sage starts at £12/month. If you prefer spreadsheets, budget bridging software starts at around £36/year.

Twelve software developers have committed to offering free versions for sole traders with straightforward affairs, so there are options if you're watching costs. All software costs are tax-deductible as a business expense.

HMRC maintains an official list of recognised software on gov.uk, which is worth checking before you commit to anything.

A programme with a rocky history

It's worth knowing that MTD for ITSA was supposed to launch in 2018. It has been delayed five times. The programme is running eight years behind schedule and roughly £1 billion over its original budget.

The National Audit Office published a damning report in 2023, finding that HMRC had left £1.5 billion in transitional costs to taxpayers out of its cost-benefit analysis. Their conclusion was stark: if those costs had been included, the combined cost of MTD would have exceeded the forecast additional tax revenue. The Public Accounts Committee's response was titled "Making Tax Difficult."

The final legislation was published on 24 March 2026, just 13 days before go-live. An industry survey found 85% of accounting firms were still in planning or pre-planning stages, and 62% said their clients were unprepared.

None of this changes the fact that the mandate is now live. But it does explain why there's so much confusion and frustration in the market right now.

What should you do right now?

If you're a sole trader earning over £50,000, here's your practical checklist:

Check your qualifying income. Look at your 2024/25 tax return. Add up your gross self-employment turnover and any property income. If the total exceeds £50,000, you're in the first wave.

Sign up for MTD. You need to register for MTD for Income Tax through your Government Gateway account before your first quarterly update. If you haven't done this yet, it's the single most urgent thing on this list.

Choose your software. You need something that's HMRC-recognised for MTD for ITSA. Look for software that handles digital record-keeping, quarterly submissions, and ideally bank connectivity so your transactions are imported automatically.

Start keeping digital records now. Even if you've been tracking things on paper or in your head, you need to be logging transactions digitally from 6 April 2026 onwards. The sooner you start, the less painful your first quarterly update will be.

Note your first deadline. Your Q1 update covering 6 April to 5 July is due by 7 August 2026.

Solas handles all of this for you, for free

This is exactly the problem Solas was built to solve.

Solas is a mobile-first accounting app designed specifically for UK sole traders. Connect your bank account and your transactions are imported and categorised automatically using AI. Snap a photo of a receipt and the details are extracted instantly. Your tax position updates in real time, not once a year when it's too late to do anything about it.

Most importantly, Solas is built for MTD from the ground up. Quarterly updates, digital record-keeping, HMRC submissions: it's all included in the free tier. You don't need to pay to stay compliant with the law.

The core features you need for MTD are completely free:

• Bank sync to automatically import transactions
• AI-powered receipt scanning that extracts merchant, amount, date and VAT
• Automatic transaction categorisation mapped to HMRC categories
• Quarterly MTD submissions direct to HMRC
• Real-time tax estimates so you always know what you owe

No spreadsheets. No desktop software. No January panic. Just your phone and a few minutes each week.

If you want to go further, the paid tier adds an AI tax assistant you can ask questions in plain English, invoicing with automatic payment tracking, and tax optimisation suggestions. But the compliance basics? Those are free. Because every sole trader above the threshold is now legally required to do this, and we don't think you should have to pay for the privilege.

Download Solas for free on the App Store and get set up before your first quarterly deadline.

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This article was researched and published in April 2026. Tax rules and deadlines can change. While we've done our best to ensure accuracy, this isn't tax advice. If your situation is complex, speak to a qualified accountant or tax adviser.