Making Tax Digital for Income Tax Self Assessment (MTD ITSA) became live for sole traders and landlords with combined gross income above £50,000 from 6 April 2026. The £30,000 threshold lands April 2027, with further thresholds following. For taxpayers catching up on multi-year arrears, MTD adds a forward-looking compliance layer that has to be planned alongside the historic catch-up. This guide explains how the two interact and how to handle both efficiently.
The principle of MTD is simple: digital records, quarterly submissions to HMRC, end-of-period statements, and a single annual final declaration. The execution is where most businesses get tripped up — choosing software, transitioning from spreadsheets, handling multi-source income across rental and trading, and navigating the new points-based penalty system that applies to MTD.
MTD does not retrospectively change historic obligations
A sole trader with three years of unfiled Self Assessment returns is not required to retrofit those years into MTD format. The historic catch-up is filed under the rules that applied at the time. MTD obligations apply only from the year the taxpayer enters the regime forward. Two systems running in parallel until the catch-up is complete is normal.
MTD ITSA thresholds and timeline
- 16 April 2026: MTD ITSA mandatory for sole traders and landlords with combined gross trading + rental income above £50,000 (based on the 2024-25 return).
- 26 April 2027: threshold drops to £30,000.
- 36 April 2028 and beyond: thresholds and inclusions to be confirmed; partnerships and lower-income individuals expected.
- 4Voluntary entry: any taxpayer can opt in earlier than the mandatory date.
The threshold tests gross income, not net profit. A landlord with £40,000 of rental income and £20,000 of trading income is in scope from April 2026 even where the net profit after expenses is much lower.
What actually changes for the taxpayer
- Records must be kept digitally in HMRC-recognised software, not in spreadsheets without bridging tools.
- Quarterly cumulative submissions to HMRC: by 7 August (Q1), 7 November (Q2), 7 February (Q3), 7 May (Q4).
- End-of-period statement at year end consolidating the four quarters.
- Final declaration replaces the existing Self Assessment return for the relevant trades.
- Penalties change from the old fixed-fine system to a points-based system (more on this below).
Choosing MTD software
HMRC publishes a list of MTD-recognised software. The leading options for sole traders and landlords:
| Software | Best for | Approximate cost |
|---|---|---|
| FreeAgent | Sole traders, especially through NatWest/Mettle/RBS bank accounts (free with eligible accounts) | £0 to £20/month |
| QuickBooks Self-Employed and QB Online | Sole traders to growing businesses | £10 to £50/month |
| Xero | Multi-property landlords, growing businesses | £15 to £55/month |
| Sage Business Cloud Accounting | Established businesses | £15 to £45/month |
| Spreadsheet + bridging tool | Simple sole traders comfortable with Excel + add-on | £0 to £100/year for bridging |
For a late-filing business already using a specific spreadsheet workflow, the bridging-software route lets the workflow continue while satisfying MTD. For a business starting fresh, native cloud accounting is usually the cleaner choice.
The points-based penalty system
MTD introduces a points-based penalty system: each missed quarterly submission earns one point, with no immediate fine. After 4 points (for quarterly filers), a £200 penalty is triggered. Points reset after a clean run of submissions plus a compliance period. This is more lenient than the old £100 day-one fine, but the £200 final-trigger penalty plus continuing points for further misses can compound. Persistent non-compliance still costs.
Transitioning from spreadsheets to cloud accounting
Many sole traders and landlords have used spreadsheets for years. The transition to cloud accounting is operationally manageable but takes a structured approach:
- 1Choose the software based on income types, complexity, and budget.
- 2Set up the chart of accounts to mirror your current spreadsheet categories (otherwise reporting comparisons break).
- 3Connect bank feeds (almost all UK banks support direct feed). This eliminates manual entry going forward.
- 4Import historic data from spreadsheets via CSV upload for at least the current tax year.
- 5Run parallel for one quarter (cloud + spreadsheet) to verify accuracy.
- 6Switch over fully and decommission the spreadsheet.
Exemptions from MTD
A small number of taxpayers can apply for exemption from MTD. The grounds:
- Religious objection to digital communication.
- Disability or age that makes digital tools genuinely impractical.
- Remote location with no reasonable broadband access.
- Business in liquidation or shortly to cease.
Exemption is granted by HMRC on application; it is not automatic. Most exemptions cover a defined period and require renewal. The exemption replaces MTD with the existing paper Self Assessment route.
Catching up on returns and worried about MTD? Get a transition plan.
A specialist will handle the historic catch-up under the rules that applied to those years and set up MTD for the forward-going period in the right software. Free initial assessment.