Quick answer: Making Tax Digital for Income Tax (MTD for ITSA) requires sole traders and landlords earning over £50,000 to keep digital records and submit quarterly updates to HMRC using compatible software — starting from 6 April 2026. AI-powered accounting tools like Xero, QuickBooks, and Sage now automate receipt capture, expense categorisation, and quarterly submission, cutting compliance time from hours to minutes. With 41% of small businesses unprepared for the first deadline on 7 August 2026, the businesses that adopt AI-assisted MTD tools now will save the most time and avoid the most stress as the threshold drops to £30,000 in April 2027.
What is Making Tax Digital for Income Tax?
Making Tax Digital for Income Tax Self Assessment (MTD for ITSA) is a UK government mandate requiring sole traders and landlords to maintain digital records and submit quarterly income and expense summaries to HMRC through compatible software. It replaces the traditional annual self-assessment paper return with a continuous digital reporting cycle.
From 6 April 2026, the first phase applies to sole traders and landlords with qualifying income above £50,000 (based on 2024/25 tax year figures). HMRC has written to over 864,000 individuals in this first wave. The second phase begins 6 April 2027 for those earning above £30,000, and a third phase follows in April 2028 for income above £20,000.
Who needs to comply with MTD and when?
The rollout is phased by income threshold:
| Phase | Income threshold | Start date | Estimated people affected |
|---|---|---|---|
| 1 | Over £50,000 | 6 April 2026 | ~780,000 |
| 2 | Over £30,000 | 6 April 2027 | ~970,000 |
| 3 | Over £20,000 | 6 April 2028 | TBC by HMRC |
According to HMRC's own impact assessment, approximately 42% of the 7 million taxpayers with self-employment or property income will need to comply between 2026 and 2028.
HMRC estimates an average transitional cost of £320 per business and an ongoing annual cost of £110 — totals of £561 million transitional and £196 million annual across all affected businesses.
How MTD quarterly updates work
Each quarter, your MTD-compatible software automatically totals your digital records and sends a summary to HMRC. The deadlines are fixed:
| Quarter | Period | Deadline |
|---|---|---|
| 1 | 6 April – 5 July | 7 August |
| 2 | 6 July – 5 October | 7 November |
| 3 | 6 October – 5 January | 7 February |
| 4 | 6 January – 5 April | 7 May |
The software handles the submission — you don't manually log into HMRC. But you do need to ensure your records are accurate and complete before each deadline.
Why are 41% of small businesses struggling with MTD?
Research from Xero, published on 7 April 2026, surveyed 1,000 UK small business owners with revenue over £50,000 who must comply with MTD from April 2026. The findings were stark:
- 41% were not ready to comply with MTD for Income Tax
- 28% were behind schedule and unsure if they would meet the first quarterly filing deadline on 7 August
- 14% had taken no action at all
The main barriers cited were software costs, confusion about which tools to use, and the sheer time required to transition from manual bookkeeping to digital record-keeping.
How AI accounting tools make MTD compliance easier
Modern MTD-compatible accounting software now includes AI features that dramatically reduce the manual work involved in digital record-keeping:
AI receipt and invoice capture
Tools like Dext and AutoEntry use AI-powered document intelligence to scan receipts and invoices, extracting supplier name, amount, date, and VAT breakdown with 98–99% accuracy. You snap a photo; the software does the rest. No manual data entry, no spreadsheets.
Automated expense categorisation
QuickBooks and MYT use AI to automatically categorise transactions based on patterns in your historical data. Once the system learns that "Costa Coffee" is a client meeting expense, it stops asking. This reduces categorisation time from minutes per transaction to seconds.
AI-assisted reminders and insights
Sage Copilot, launched in 2026, acts as an AI assistant within Sage's accounting platform. It nudges you about unpaid invoices, upcoming tax deadlines, and suggests categorisation for uncategorised transactions. Think of it as a digital bookkeeper that never forgets.
Bank feed automation
All major MTD-compatible platforms (Xero, QuickBooks, Sage, FreeAgent) connect directly to UK business bank accounts. Transactions flow in automatically, and AI-assisted matching links them to the corresponding invoices or receipts. This satisfies MTD's digital link requirement without manual reconciliation.
Best MTD-compatible accounting software for small businesses in 2026
| Software | Price from | Best for | Key AI features |
|---|---|---|---|
| Xero | £20/month | Growing sole traders | Bank feed AI matching, receipt scanning |
| QuickBooks | £12/month | UK-specific features | AI expense capture, VAT + ITSA filing |
| Sage | £15/month | Compliance-focused | Sage Copilot AI assistant, deadline reminders |
| FreeAgent | £15/month | Freelancers and contractors | Auto bank feeds, HMRC submission |
| MYT | £10/month | Tradespeople (builders, plumbers) | AI receipt processing, mileage tracking |
All five are HMRC-recognised for MTD for VAT and are developing or have launched MTD for ITSA support.
How to prepare for MTD if you haven't started yet
If you missed the first quarterly deadline on 7 August — or you're preparing for the April 2027 phase — here's a practical checklist:
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Check your qualifying income. If your combined self-employment and property income exceeded £50,000 in 2024/25, you're already in scope. If it was between £30,000 and £50,000, you join in April 2027.
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Choose MTD-compatible software. Pick one platform and commit to it. Switching later is painful. Most offer 30-day free trials — test two or three before deciding.
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Move your records to digital. Photograph all receipts, connect your bank feed, and let the AI categorise transactions. Don't try to maintain a parallel spreadsheet — the digital link rule means your records must flow digitally from source to HMRC without re-keying.
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Set a quarterly reminder. Even with automated software, you need to review and approve the quarterly submission before it goes to HMRC. Put the four deadline dates in your calendar now.
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Get help if you need it. If your records are messy, your income sources are complex, or you're unsure about what qualifies as digital record-keeping, a two-hour Business Optimisation audit can map your processes and identify exactly what needs to change before the next deadline.
How CortexLeap helps: We map your current bookkeeping and tax workflows, identify where AI and automation can reduce manual admin, and set up MTD-compliant systems that work for your specific business. Our Business Optimisation audit gives you a clear roadmap to MTD compliance in two hours — including software recommendations tailored to your business type and budget.
Common MTD mistakes to avoid
Using bridging software as a permanent fix
Bridging software connects Excel or CSV files to HMRC's API, satisfying the digital link rule. It works for straightforward cases, but HMRC expects you to move to full digital record-keeping. Bridging is a stopgap, not a long-term solution.
Assuming MTD for VAT is the same as MTD for ITSA
MTD for VAT has been mandatory since April 2022 and only requires quarterly VAT returns. MTD for ITSA requires quarterly income and expense summaries — a different set of data and a different filing process. Don't assume your current VAT setup covers everything.
Waiting until the last minute
The businesses that struggled most with the 7 August deadline were the ones that started in June or July. Transitioning to digital records takes 2–4 weeks of consistent work. Start at least one full quarter before your first filing deadline.
FAQ
What happens if I miss an MTD quarterly deadline?
HMRC applies a points-based penalty system. Each missed deadline accumulates points, and once you reach a threshold (based on your filing frequency), you receive a £200 penalty. Points reset after a period of compliance. It's far cheaper to get compliant now than to pay penalties on top of accounting costs.
Can I use Excel for MTD?
Yes, but only with bridging software that creates a digital link to HMRC's API. HMRC does not provide its own MTD for ITSA software, so you'll need a third-party bridge tool. For most small businesses, full accounting software is simpler and more reliable than maintaining a bridging Excel setup.
Do I still need to do a self-assessment tax return?
For the 2025/26 tax year, yes — you'll file a self-assessment return the traditional way by 31 January 2027. From the 2026/27 tax year onwards, your final declaration is submitted directly through your MTD for ITSA software, replacing the traditional self-assessment return.
What's the cheapest MTD-compatible option?
MYT starts at around £10/month and includes AI receipt processing. Sage Sole Trader and FreeAgent both start at £15/month. If your income is modest and your bookkeeping is simple, the lower-tier plans from any major provider will cover your MTD needs.
Is MTD coming to Portugal too?
Portugal already requires electronic invoicing (e-fatura) and digital VAT reporting through the Portal das Finanças. While the structure differs from the UK's MTD, the trend is the same: tax authorities across Europe are moving to real-time digital reporting. Portuguese SMEs should expect similar compliance pressures as the government continues digitising tax processes.
Take action before the next deadline
The second MTD quarterly update is due 7 November 2026. If you haven't set up compliant software yet, you have a narrow window to get it right before the pressure builds again. And with the threshold dropping to £30,000 in April 2027, another 970,000 businesses will face the same challenge — so getting ahead now saves stress later.
Book a Business Optimisation audit to get your MTD compliance roadmap in two hours. Book a free discovery call if you're not sure where to start.
Last updated: 2026-08-16