HMRC’s official figures on Making Tax Digital for Income Tax put compliance at around 87%. The ground-level data presented by Bright at Accountex Manchester on 28 September 2026 tells a different story: only 54% of the 864,000 mandated taxpayers actually submitted their Q1 MTD ITSA return (Accountancy Age, 28 September 2026). The 33-percentage-point gap is what Paul Onions, VP Product at Bright, calls a “silent crisis”.
Context: A First Compliance Wave That Fell Short
Making Tax Digital for Income Tax came into force in April 2026 for taxpayers with annual income above £50,000. The Q1 quarterly report submission was the first concrete milestone. And that is precisely where the numbers diverge.
HMRC counts as “compliant” any taxpayer registered on its portal with declaratory obligations configured. Bright, which aggregates data from over 14,000 UK accounting practitioners, measures actual submission of returns. Out of 864,000 mandated taxpayers:
- 67% (583,000) were registered with HMRC
- 61% (530,000) had active obligations configured
- 54% (463,000) had actually submitted their Q1 return
The gap between “registered” and “return filed” is the blind spot in the official statistics.
Impact on Accounting Firms and SME Finance Teams
Bright’s survey exposes two structural fractures that go well beyond simple administrative delays.
70% of MTD clients have no native cloud accounting software. Among them, 37% still rely on paper or Excel spreadsheets to maintain their books. This segment explains the heavy reliance on transitional solutions: 24% of Q1 submissions used bridging software — tools that extract data from a spreadsheet and submit it in MTD-compliant format. “Bridging software is not a niche workaround — it accounts for nearly a quarter of all quarterly submissions,” Paul Onions noted in his presentation (ibid.).
For unprepared firms, the operational cost is immediate. Practices whose clients lack compatible cloud software reported a 46% increase in processing time per file — roughly 35 additional non-billable minutes per return. At scale, across a monthly book of clients, that represents a significant burden for technical teams and account managers alike.
For a CFO or IT director at a UK SME with one or more taxable entities above the MTD threshold, the risk is not purely regulatory. Four recurring technical friction points have been identified: lack of standardised submission confirmation, “wrong year” registration bugs, mismatches between the fiscal and calendar year schedules, and gaps in the HMRC pilot programme. Together, they signal a still-fragile ERP-to-HMRC integration that in-house teams must plan for.
What to Watch
The next wave arrives in 2027: the MTD ITSA threshold drops to £30,000 annual income, then to £20,000 the year after. If only 54% of taxpayers at the £50,000 threshold — the best-advised cohort, most likely to have an accountant — submitted Q1, the arrival of the £30,000 tier represents a far larger population that is less equipped and less supported.
For ERP vendors and implementation partners, this is a clear commercial window: firms that absorbed those 35 extra minutes per return in Q1 will look to rationalise their software stack before Q2 and Q3. The question put directly at Accountex: move to a native cloud solution now, or keep absorbing the manual overhead quarter after quarter.
For background on the MTD legal framework, read our article Making Tax Digital UK: Income Tax Obligation for £50k+ Earnings Takes Effect. For context on HMRC’s September 2026 auto-enrolment campaign, see HMRC Is Automatically Enrolling Sole Traders in MTD — What Changes from September 2026. To track adoption rates since launch, see MTD Income Tax: 219,000 Registrations Out of 780,000 — Slow but Real Adoption.
