What Happens If You Miss the August 2026 MTD Deadline?
Making Tax Digital for Income Tax went live on 6 April 2026. The very first quarterly deadline is 7 August 2026. If you haven’t set up your MTD-compatible software yet, here’s exactly what HMRC will (and won’t) do.
The Good News: 2026/27 Grace Period
Take a breath. HMRC has confirmed that there are no penalty points for missing quarterly update deadlines during the first tax year (2026/27). The government knows this transition is complex, so the first 12 months are a “soft landing.” If you miss the August, November, February, or May deadlines, you will not receive a fine.
The Bad News: From April 2027
From the 2027/28 tax year, HMRC’s points-based penalty system kicks in permanently:
- Every late quarterly update earns 1 penalty point
- At 4 points, you receive a £200 fine
- Every subsequent late submission also triggers £200
- Points expire after 24 months of perfect compliance
Late Payment Fines Still Apply Now
Critical distinction: late submission penalties are waived in 2026/27, but late payment penalties are not. If you fail to pay your actual tax bill by 31 January, interest accrues immediately at the Bank of England base rate plus 2.5%, with additional percentage penalties after 15 and 30 days.
What You Should Do Now
Even though quarterly update penalties are waived this year, you are still legally required to keep digital records from 6 April 2026. Get MTD-compatible software set up, connect your bank account, and practice submitting before the August deadline. Use the grace period to learn the system, not to avoid it.