If your income has dropped and you're wondering when you can actually stop using MTD, you've probably seen the phrase "three consecutive years" mentioned somewhere — usually without much explanation. This page explains exactly what that rule means, how it's tested, and walks through real worked examples so the mechanics are genuinely clear, not just named.
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The rule in one sentence: Once you're in MTD, your qualifying income generally needs to stay below your relevant threshold for three consecutive tax years before you become eligible to exit and revert to annual Self Assessment. A single low year — even two — does not get you out.
Why Three Years, Not One?
This rule exists because income for many self-employed people and landlords genuinely fluctuates year to year — a quiet year, a big contract that didn't repeat, a tenant void period. If a single low year was enough to exit, people could realistically cycle in and out of MTD repeatedly, which defeats the point of the system providing HMRC with consistent, ongoing visibility of income.
Requiring three consecutive years below the threshold is HMRC's way of distinguishing a genuine, sustained drop in income from a temporary dip — only a real, durable change in your circumstances qualifies you to leave.
Worked Example 1: The Drop That Doesn't Qualify Yet
Sarah is a sole trader in Phase 1 (£50,000 threshold), mandated into MTD from April 2026 based on her 2024–25 income of £58,000.
2026–27
£52,000 — above threshold
2027–28
£38,000 — below threshold
2028–29
£35,000 — below threshold
After two consecutive years below £50,000, Sarah is not yet eligible to exit. She needs one more consecutive year below the threshold (2029–30) before the three-year test is satisfied. She remains in MTD, continuing quarterly updates, throughout this entire period.
Worked Example 2: The Reset
James is in the same position as Sarah, but his income behaves differently:
2026–27
£55,000 — above threshold
2027–28
£41,000 — below threshold
2028–29
£53,000 — back above threshold
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The consecutive count resets. Because James's income went back above the threshold in 2028–29, his progress towards the three-year exit test resets to zero. If his income drops below the threshold again in 2029–30, that becomes year one of a fresh three-year count — his earlier below-threshold year (2027–28) does not carry forward or count towards a new streak.
Worked Example 3: Successfully Qualifying to Exit
Doug sold his second rental property in 2026 and his remaining self-employment and rental income has settled at a genuinely lower, stable level:
2026–27
£24,000 — below threshold
2027–28
£22,000 — below threshold
2028–29
£25,000 — below threshold
Eligible to exit
Apply to HMRC to revert to Self Assessment
After three full consecutive tax years below the relevant threshold, Doug becomes eligible to apply to HMRC to exit MTD and revert to annual Self Assessment. Importantly, this is still an application, not an automatic switch — see our full exit process guide for exactly how to formally notify HMRC and what happens while you wait for confirmation.
Which Threshold Applies?
Because MTD is rolling out in phases with falling thresholds (£50,000 → £30,000 → £20,000), this raises a genuine question: if you joined under the £50,000 threshold, does the three-year test use £50,000, or the lowest threshold currently in force?
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This is assessed against your relevant threshold at the time, which in practice may track the lowest threshold in force given the ongoing phased rollout. As thresholds fall over time, this can make the exit test progressively harder to satisfy — income that would have qualified as "below threshold" in 2026 might not in 2028 once Phase 3's £20,000 threshold is the relevant benchmark. This is a genuinely nuanced area where your specific join date and phase matter — confirm your exact position with HMRC or a qualified accountant rather than assuming.
What Doesn't Change During the Three Years
While you're working towards meeting the three-year test, your obligations remain fully in place:
You continue submitting all four quarterly updates each year
You continue submitting a Final Declaration each year
Penalty points and deadlines apply exactly as they would for anyone else in MTD
You cannot pause submissions while "waiting out" the three years — there is no dormant or suspended status
This Is Not the Same as an Exemption
It's worth being precise here: the three-year exit rule is entirely separate from MTD exemptions. Exemptions are granted on grounds like disability, age-related digital exclusion, religious belief, lack of internet access, or temporary hardship — and can apply regardless of your income level, sometimes from day one. The three-year rule is purely about your income genuinely and sustainably falling below your relevant threshold over a sustained period. If you believe you qualify for an exemption on one of those separate grounds, that route doesn't require waiting three years at all.
Frequently Asked Questions
HMRC's guidance indicates that once you are in MTD, your qualifying income generally needs to fall below your relevant threshold for three consecutive tax years before you become eligible to come out of MTD and revert to annual Self Assessment. A single low-income year, or even two, does not automatically remove your obligation.
This is assessed against your relevant threshold at the time, which may be the lowest threshold in force given the phased rollout. As thresholds fall over the rollout (£50,000, then £30,000, then £20,000), the test naturally becomes harder to meet exiting under, since the bar to count as genuinely below threshold falls too. Confirm your specific position with HMRC or an accountant given your join date and phase.
Yes. Until HMRC has formally confirmed your exit, you remain obligated to submit quarterly updates and a Final Declaration each year, even while your income sits below the threshold and you are working towards meeting the three-consecutive-year test.
If your income rises back above the threshold in any of the three years, the consecutive count resets. You would need three full consecutive years below the threshold starting fresh from that point before becoming eligible to exit.
No, these are different routes. The three-year rule is about your income genuinely and sustainably falling below the threshold over time. MTD exemptions, covered in our dedicated exemptions guide, are a separate process based on disability, age, religious belief, lack of internet access, or hardship — granted by HMRC application regardless of income level.
Check Your Current MTD Position
Confirm exactly where your current income sits against the thresholds before assessing your exit timeline.