HMRC 2026 Update: Navigating MTD Deadlines and the £137m Late-Payment Surge
HM Revenue & Customs (HMRC) is currently implementing the most significant changes to the UK tax system in a generation. As of mid-March 2026, the department is preparing for the mandatory rollout of Making Tax Digital (MTD) and adjusting thresholds for the new tax year starting 6 April.
HMRC also recently reported a significant revenue surge from late payment interest. The department collected over £137 million from late filers so far this year. This highlights the increasing cost of non-compliance as interest rates remain high.
The Digital Mandate: Making Tax Digital (MTD) 2026
The biggest shift for sole traders and landlords begins in less than three weeks. From 6 April 2026, the traditional annual Self Assessment return starts to disappear for high earners. You can find more details on the official MTD guidance.
- Who is affected? Any individual with a total gross income from self-employment or property exceeding £50,000 must comply.
- The New Process: You must now keep digital records and send quarterly updates to HMRC using compatible software.
- The First Deadline: Filers in this bracket must submit their first quarterly update by 7 August 2026.
- Penalty Points: HMRC is replacing immediate fines with a points-based system. You only receive a £200 financial penalty after reaching a specific points threshold.
2026/27 Tax Year: Key Thresholds and Changes
The Chancellor’s recent statements confirmed that many tax bands will remain frozen. This “fiscal drag” will pull more taxpayers into higher brackets as wages rise. Detailed rates are available on the HMRC rates and thresholds page.
| Tax Type | 2026/27 Rate/Threshold | Key Change |
|---|---|---|
| Personal Allowance | £12,570 | Frozen until 2028 |
| Dividend Tax (Basic) | 10.75% | Increased by 2% from 8.75% |
| Dividend Tax (Higher) | 35.75% | Increased by 2% from 33.75% |
| Vaping Products Duty | New for 2026 | Registration starts 1 April 2026 |
| Home-Working Relief | £0 | Relief Abolished (must be reimbursed by employer) |
Corporate and Customs Updates: AI and CBAM
HMRC is also modernising how it interacts with businesses. On 10 March 2026, the department launched a consultation to standardise Corporation Tax computations. They want to move away from “free-format” submissions to a fully tagged, machine-readable format by 2027.
Furthermore, the Carbon Border Adjustment Mechanism (CBAM) is moving into a critical phase. HMRC is currently seeking feedback on guidance for importers of carbon-intensive goods. This policy ensures imported products like steel and aluminium face a comparable carbon price to UK-made goods.
Finally, HMRC is aggressively using Generative AI and its “Connect” supercomputer to spot tax evasion. These systems cross-reference bank data, social media, and online platforms to identify lifestyle discrepancies. This digital-first approach helps the department target fraud more accurately than random audits.
Frequently Asked Questions (FAQs)
What happens if I earn between £30,000 and £50,000?
You do not need to join MTD this year. Your mandatory start date is 6 April 2027. Continue filing your Self Assessment annually until then.
Can I still use spreadsheets for my tax records?
You can, but only if you use “bridging software” to send the data to HMRC. Simple spreadsheets alone no longer meet the digital record-keeping requirements for MTD.
Is the National Insurance rate changing in April 2026?
No. The main rate for employees remains at 8% for earnings between £12,570 and £50,270. Employer contributions remain at 15%.
What is “AI-washing” in a tax context?
HMRC is monitoring firms that claim to use AI to improve tax compliance without actual proof. They want to ensure tech claims do not mislead the market or the tax office.
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