Making Tax Digital for Income Tax Self Assessment: Essential Compliance Steps for 2026

Published: April 13, 2026

As of 6 April 2026, the UK’s Making Tax Digital (MTD) regime for Income Tax Self Assessment (ITSA) has become mandatory for the first wave of taxpayers. This affects approximately 1.3 million sole traders, landlords, and partnerships with business or property income over £50,000 per year. For CFOs, PE professionals, and turnaround specialists, this is not just a self-employed issue—it’s a compliance risk permeating supply chains, portfolio companies, and operational costs.

What is MTD for ITSA?

MTD ITSA requires:

• Digital records: All income, expenses, and adjustments stored digitally, linked chronologically to tax calculations.
• Quarterly updates: Four submissions per tax year (ending 5 July, 5 October, 5 January, 5 April), showing cumulative position.
• Final declaration: Via Self Assessment by 31 January.

Compatible software is mandatory—no spreadsheets or manual methods. HMRC’s list: Check compatible software.

Recent ICAEW brief (31 March 2026): Tax news in brief. HMRC is strengthening tax software standards to reduce errors (details).

Who Does It Affect?

• Threshold 2026/27: £50k+ relevant income (self-employment/property).
• 2027/28: Drops to £30k.
• Exemptions: Limited company directors (unless side self-employment), trusts, non-residents (some).

For PE/M&A: Targets with self-employed key personnel or landlord assets must verify MTD readiness in due diligence. CFOs: Monitor contractors/freelancers—non-compliance risks cashflow disruptions.

Practical CFO Steps

1. Assess Exposure

Audit portfolio/supply chain: income thresholds, current record-keeping (Excel? Migrate now).

2. Select MTD Software

Top options: Xero, QuickBooks, FreeAgent—bridge to MTD. Cost: £10-50/month per user. HMRC oversight increasing—choose listed providers.

3. Implement Processes

Training: 2-4 hours per user.
Integration: Link accounting ERP to MTD.
Quarterly cadence: Automate reminders.

4. Error Mitigation

Penalties start £100/filing late, escalating. HMRC ‘nudge’ letters incoming.

Case study: Early adopters (voluntary 2025/26) report 20% admin time reduction post-setup (ICAEW surveys).

Risks in Turnaround & Distressed Scenarios

In distress, MTD adds burden: cash-strapped sole traders delay software investment. Quarterly updates strain liquidity.
CFO tip: Prioritise MTD funding in rescue plans; negotiate HMRC time-to-pay.

News Context

• Software standards: HMRC to enforce higher quality, oversight (ICAEW).
• Childminders guidance: Updated for MTD (link).
• Public debate: Costs vs benefits—£849m spent since 2015, critics question ROI (X discussions).

PE/M&A Considerations

• DD checklist: MTD compliance status, software licenses transferable?
• Post-deal: Harmonise reporting across portfolio.

Call to Action

Stay ahead of compliance pitfalls. Tanous Limited offers specialist CFO advisory for MTD transitions, PE due diligence, and turnaround planning. Contact Mark Hendy or subscribe for weekly insights.

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Sources: HMRC, ICAEW, AccountingWeb insights, X news aggregation.