On 7 August 2026, hundreds of thousands of UK sole traders and landlords face their first quarterly deadline under Making Tax Digital for Income Tax. Most coverage frames the year that follows as a friendly grace period — a "soft landing" while HMRC eases people into a new way of filing. The phrase has been everywhere since the Spring 2025 announcement.

The phrase is also misleading. HMRC's actual wording is sharper than "soft": there are no penalties for missing a quarterly update deadline in 2026/27. Not reduced penalties, not warning letters — none. That's softer than most commentary describes. But it's also exactly what makes year two dangerous. Sole traders who treat 2026/27 as practice, miss a few updates, and never build the cumulative-record habit will walk into 2027/28's points-based regime with no muscle memory and a £200 fine waiting at the fourth miss.

This post is the honest read on what year one actually requires, what it doesn't, and what to do between now and 7 August. Every figure here comes from HMRC's own guidance, verified at gov.uk, with sources at the bottom.

Skip to the four 2026/27 deadlines

What HMRC actually said about year one

HMRC's penalty guidance for MTD for Income Tax contains one sentence that does almost all of the work in the current debate:

HMRC: "There are no penalties for missing a quarterly update deadline for the 2026 to 2027 tax year."

That is broader than most commentary acknowledges. It isn't "no points but still fines" — it's no penalties at all on the four quarterly deadlines in year one. Late payments get a separate concession too: "In your first year of new penalties, you have 30 days from the payment due date to either make full payment or contact HMRC to set up a payment plan." Pay or call within 30 days, no late-payment penalty either.

So what does year one still penalise? Three things. The annual final declaration — your Self Assessment return for 2026/27, due 31 January 2028 — is covered by the standard Self Assessment late-submission rules, untouched by the MTD soft landing. Late payment from day 31 onward triggers the new MTD penalty regime in full. And anything in year two onward starts ticking against the new points-based late-submission framework from its very first quarterly deadline.

The "soft landing" is real. It is also the setup for the year-two trap.

The four 2026/27 deadlines

Each quarterly update covers a period that starts on 6 April and ends three, six, nine, or twelve months later. The submission deadline falls on the 7th of the following month.

Update period Deadline
6 April 2026 — 5 July 20267 August 2026
6 April 2026 — 5 October 20267 November 2026
6 April 2026 — 5 January 20277 February 2027
6 April 2026 — 5 April 20277 May 2027

Two things to note. First, every period starts on 6 April. The November submission isn't "July–October" — it's "April–October". That isn't a typo; it's the most-misunderstood thing about MTD ITSA, and it gets its own section below. Second, if your accounting period runs to a calendar month-end instead of the tax-year date (1 April – 30 June, 1 April – 30 September, and so on), your software can opt you into "calendar quarters" — same deadlines, just neater period dates for businesses that already close their books on month-end. Standard tax-year quarters are the default.

The rules moved this year — be careful which guides you trust. HMRC finalised the 7th-of-month deadline late in the design cycle; volunteer testers were filing on the 5th throughout 2025. The year-one "no penalties" concession was confirmed after the original penalty framework was published. Blog posts written in 2024 or early 2025 may still show 5 August / 5 November / 5 February / 5 May, and may still describe a points-only soft landing rather than a no-penalty one. Verify against gov.uk.

What the soft landing doesn't cover

Three uncovered surfaces. Each is the kind of thing that's easy to miss when commentary is framing year one as "free".

1. The final declaration on 31 January 2028

The year-one waiver covers the four quarterly updates only. The final declaration — your annual Self Assessment return, the thing that calculates your actual tax bill for 2026/27 — sits inside the standard Self Assessment penalty regime. Miss it by a day and you get the same £100 fixed penalty Self Assessment has charged for years. Three months late adds £10 a day. Six months late adds another £300 (or 5% of tax due, whichever is higher). None of this is new; none of it is covered by the soft landing.

2. Late payment from day 31 onward

The 30-day grace covers year one — but only year one, and only up to day 30. If your tax bill is paid late and you haven't contacted HMRC by day 31, the new MTD late-payment regime applies in full: 3% of unpaid tax charged at day 15 (counted retrospectively), another 3% at day 30, and a 10% annualised daily interest rate from day 31 onward. From 2027/28 the first two charges rise to 4% each. The 30-day window is genuinely useful — it's also genuinely a window.

3. Anything in 2027/28 onward

Year two is when the points-based late-submission regime turns on for everyone mandated. One point per missed quarterly deadline, four points triggers a £200 fixed penalty, then £200 for each subsequent missed deadline. Points below the four-point threshold expire automatically 24 months after the missed deadline. Above the threshold, points only clear once you've submitted on time for 12 consecutive months and caught up any outstanding submissions from the previous 24. Year one is practice. Year two is for keeps.

Year one is for building habits. Whether or not the software you choose submits MTD updates directly, the muscle memory of "log it as you go" is what makes year two manageable. Most sole traders fail MTD not because the rules are hard, but because they're trying to reconstruct three months of receipts the night before a deadline.

Nuxo Tax is built for that habit: real-time income and expense tracking, AI categorisation against HMRC's expense categories, and a cumulative year-to-date position that's ready whenever you need it — for a quarterly update, a payment-on-account estimate, or just to know where you stand. Note: Nuxo Tax is not on HMRC's MTD-compatible submission software list yet — we're working on it. See the software section below.

Quarterly updates are cumulative — and most coverage gets this wrong

Search "MTD quarterly updates" and you'll find dozens of guides describing the new regime as "four mini tax returns a year". That description is categorically wrong, and the misunderstanding it creates is the single most expensive habit a new MTD filer can pick up.

Quarterly updates aren't isolated periods. Each one reports income and expenses cumulatively, from 6 April to the end of the relevant quarter. The August update covers April to July. The November update covers April to October. The February update covers April to January. The May update covers April to April — the full year. Every submission is a year-to-date snapshot, not a quarterly slice.

This sounds like a pedantic distinction. It isn't. It changes how errors get corrected: you don't file amended quarterly returns to fix a miscoded expense from August. You submit the November update with the right figures, and the cumulative arithmetic supersedes August's wrong figures. The cumulative model is forgiving of mid-year corrections in a way the "four mini returns" mental model isn't. It also means your software's job is fundamentally different from a traditional bookkeeping tool: instead of "balance the quarter", it's "track the running total from 6 April, every day".

For people who already use real-time tracking — receipts captured at point of sale, expenses categorised the day they happen — the cumulative model is roughly free. For people running spreadsheets that get reconciled once a quarter, the cumulative model is materially harder, because every reconciliation has to surface earlier errors before the deadline lands.

The cumulative model is exactly what real-time tracking was built for. Most software treats quarterly updates as four discrete periods because it's easier to engineer. Nuxo Tax tracks your position cumulatively from 6 April every time you log income or an expense — so your year-to-date figure is always current. Whether the eventual MTD submission is filed via bridging software, an accountant, or future Nuxo functionality, the underlying records are already in the shape HMRC wants them in.

Who has to do this — and what "£50,000" actually means

The mandation timetable in full, per HMRC's published thresholds:

Qualifying income threshold Assessed against MTD applies from
Over £50,0002024/25 tax return6 April 2026
Over £30,0002025/26 tax return6 April 2027
Over £20,0002026/27 tax return6 April 2028

Two clarifications matter more than the headline figures.

First, "qualifying income" is gross, not net. HMRC's wording: "HMRC will assess your gross income (income before you deduct expenses, also called your turnover)." A sole trader billing £52,000 with £8,000 of allowable expenses has gross income of £52,000, net profit of £44,000, and is mandated for MTD in 2026/27. The gross figure decides who has to file; the actual tax owed is still calculated on net profit at the final declaration. Two different numbers, two different purposes — but the threshold test ignores expenses entirely.

Second, self-employment and property income combine. "Your qualifying income is the total income you get in a tax year from self-employment and property." Someone with £27,000 of freelance income and £25,000 of buy-to-let rental income has £52,000 of qualifying income and is mandated, even though neither stream alone clears £50,000. Multiple self-employment trades stack the same way. Employment (PAYE), pensions, dividends, and partnership income do not count toward the threshold.

If you're close to a threshold and unsure where you land, our live sole-trader tax calculator will show you both gross and net positions from a single profit figure. And if the gross-not-net rule worries you that you can't claim expenses — you can. Our complete expenses guide covers what HMRC actually accepts.

Cash basis vs accruals: the unsung MTD admin lever

From 6 April 2024 cash basis became the default accounting method for sole traders and partnerships without corporate partners. HMRC's wording is straightforward: "Cash basis accounting is the standard way to record your income and expenses if you're a sole trader or partnership without corporate partners." Most one-person businesses are already on it without realising the change was specifically named.

For MTD purposes the choice matters more than usual. Under cash basis, a quarterly update is essentially a sum of money received and money spent in the period — bank-statement arithmetic. Under accruals, the same update has to track debtor positions (invoices issued but not yet paid), creditor positions (bills received but not yet paid), and any work-in-progress that's been performed but not invoiced. Every quarter. The administrative gap between the two methods is genuinely large.

If you're already on cash basis, stay there unless a specific reason demands otherwise. If you opted into accruals years ago for financing requirements, complex stock, or VAT-flat-rate edge cases, check whether that reason still applies before adding accruals overhead to four quarterly updates a year.

The final declaration IS your Self Assessment return

One framing that often gets garbled in commentary: the final declaration does not replace Self Assessment. It is Self Assessment, submitted differently.

HMRC's exact wording on payments and deadlines is unambiguous: "Making Tax Digital for Income Tax will not change the way you pay tax or the dates that payments are due." Your balancing payment for 2026/27 is still 31 January 2028. Your first payment on account for 2027/28 is also 31 January 2028. The second payment on account is 31 July 2028. None of this moved.

What changed is the submission mechanism. Instead of typing figures into HMRC's online Self Assessment form once a year, your MTD-compatible software accumulates the year's quarterly updates, lets you add the year-end adjustments (capital allowances, private-use adjustments, basis-period balancing items if any apply), and submits the whole thing as the final declaration by 31 January. Your Government Gateway login, UTR, and Self Assessment account all still apply.

Same deadline. Same payment date. Same underlying tax calculation. Different filing route.

The year-two trap: how £200 penalties actually accrue

From 6 April 2027 — that is, on the very first quarterly update of the 2027/28 tax year — the points regime turns on for everyone mandated. The rules:

  • One point per missed deadline (quarterly update or final declaration).
  • Four points triggers a £200 fixed penalty. Every subsequent missed deadline after the threshold is another £200, immediately.
  • Below the four-point threshold, individual points expire automatically 24 months after the missed deadline.
  • Above the threshold, points only clear once you've submitted on time for 12 consecutive months and brought all submissions from the previous 24 months up to date.

Consider what this looks like for someone who treats 2026/27 as practice and never builds a quarterly habit. They miss all four 2026/27 deadlines — no consequence. Year two arrives. They miss the August 2027 update (1 point). November (2 points). February 2028 (3 points). May 2028 (4 points → £200 penalty). The year-two final declaration on 31 January 2029, if also missed, is another £200 — points are already at threshold so every additional miss is an automatic fine. To clear those points, they need 12 consecutive months of on-time submissions and to have caught up the previous 24 months. By that point they're effectively rebuilding from zero.

The same person who treats 2026/27 as if penalties applied — who hits all four deadlines on time even though nothing would happen if they didn't — enters year two with the cumulative-tracking habit already wired in. Year two becomes a continuation, not a discovery.

Late payment is the other half

Late submission and late payment are two separate regimes. The points framework above applies only to submission. Paying tax late is governed by HMRC's reformed late-payment penalty schedule, which compounds rapidly past day 30.

Days late 2026/27 (year-one) 2027/28 onward
1 — 150%0%
16 — 303% of tax owed4% of tax owed
Day 31++ another 3% + 10% annualised daily rate+ another 4% + 10% annualised daily rate

The year-one column has one extra concession on top of the percentages: "In your first year of new penalties, you have 30 days from the payment due date to either make full payment or contact HMRC to set up a payment plan." Pay or call within 30 days in 2026/27 and the 3% doesn't bite. From day 31, the year-one column applies in full and the 30-day grace is gone.

A worked example for 2027/28. Tax bill of £4,000, paid 60 days late, no payment plan in place. At day 15, the first late-payment charge applies: 4% × £4,000 = £160. At day 30, the second charge applies: another 4% × £4,000 = £160. From day 31 through day 60 — 30 days — daily interest accrues at the 10% annualised rate: 30 × (10%/365) × £4,000 = £32.88. Total cost on top of the original tax: £352.88.

What to do between now and 7 August 2026

A short, sequential checklist. None of these takes more than an evening; together they remove almost every avoidable surprise.

  1. Check your 2024/25 qualifying income. Add gross self-employment turnover to gross rental income. If the total is over £50,000, you're mandated for MTD from 6 April 2026 and the first deadline is yours. HMRC writes to people they think are mandated, but verifying yourself is faster.
  2. Pick MTD-compatible submission software. The current recognised-software list is published at gov.uk and updated monthly. Bridging software counts (it connects existing spreadsheets to HMRC's API). What does not count: paper records, spreadsheets emailed to HMRC, or the regular online Self Assessment form. If your accountant files for you, ask which software they're using and whether you need a paired client tool.
  3. Confirm you're on cash basis unless you have a specific reason not to be. Default from 6 April 2024; materially simpler under MTD.
  4. Set up the digital record habit now. Don't wait for 6 April 2026. Track income and expenses today, in the format your eventual MTD software will want them in, so the first cumulative quarterly update is a finished snapshot rather than a reconstruction project.
  5. Treat the first quarterly update like it counts even though nothing happens if you miss it. The four 2026/27 deadlines are practice runs; the points regime turns on 6 April 2027 with no further grace.

On software, the honest disclosure: Nuxo Tax is not on HMRC's MTD-compatible submission software list yet — we're working on it. What Nuxo does today is keep the digital records HMRC requires, in the format they expect, with AI categorisation against HMRC's expense categories. When you file through MTD-compatible submission software (or your accountant does), your records are already in the right shape to feed straight in.

Frequently asked questions

Do I actually have to do MTD if my income is under £50,000?

Not in 2026/27. The £50,000 qualifying-income threshold applies for the 2026/27 tax year only. From 6 April 2027 the threshold drops to £30,000, and from 6 April 2028 it drops again to £20,000. HMRC checks your previous Self Assessment return to decide mandation — so 2024/25 income decides 2026/27 mandation, 2025/26 income decides 2027/28 mandation, and so on. If you're close to a threshold, expect HMRC to write to you the spring before the rules apply.

Is the £50,000 threshold gross income or after expenses?

Gross. HMRC's wording is explicit: "HMRC will assess your gross income (income before you deduct expenses, also called your turnover)." This worries people who think it means they can't deduct expenses — that isn't what it means. Mandation is decided on gross income. The actual tax you pay is still computed after every allowable expense you claim, on the final declaration at the end of the year. Two different figures, two different purposes.

What if I have both self-employment and rental income — do they stack?

Yes. HMRC adds them together: "Your qualifying income is the total income you get in a tax year from self-employment and property." Someone with £27,000 from a freelance trade and £25,000 from a buy-to-let has £52,000 of qualifying income and is mandated for MTD in 2026/27 — even though neither stream alone clears £50,000. Multiple self-employment trades stack the same way. Employment (PAYE), pensions, dividends, and partnership income do not count toward the threshold.

Can I just keep using spreadsheets?

Spreadsheets alone, no. Spreadsheets plus bridging software, yes. HMRC requires that records be kept and submitted via commercial software that works with Making Tax Digital for Income Tax. Bridging software counts — it connects your existing spreadsheet records to the HMRC API. What does not count: paper records, spreadsheets emailed to HMRC, or the regular online Self Assessment form. The compatible-software list is published at gov.uk and updated as more vendors complete HMRC's recognition process.

What happens if I miss the 7 August 2026 deadline?

Nothing — in 2026/27 only. HMRC's exact wording: "There are no penalties for missing a quarterly update deadline for the 2026 to 2027 tax year." That covers all four quarterly deadlines in year one. From 2027/28 the points-based regime kicks in: one point per missed deadline, with a £200 fixed penalty when you hit four points. The risk is treating year one as optional, never building the quarterly habit, then missing four updates in 2027/28 and triggering £200 on the fourth miss with £200 for each subsequent miss after that.

Does MTD change when I pay my tax?

No. HMRC is explicit: "Making Tax Digital for Income Tax will not change the way you pay tax or the dates that payments are due." Your balancing payment for 2026/27 is still 31 January 2028. Your first payment on account is 31 January 2028 too; the second is 31 July 2028. The quarterly updates report income — they don't demand payment. Tax is still calculated and paid annually.

Will my existing Self Assessment login still work?

Yes. MTD ITSA runs inside the Self Assessment framework, not alongside it. Your Government Gateway login, your UTR, your Self Assessment account — all still apply. What changes is the submission mechanism: instead of typing figures into HMRC's online form once a year, your compatible software sends quarterly cumulative updates and the year-end final declaration through HMRC's API. The final declaration IS your Self Assessment return — same deadline, same payment date, different delivery.

Should I switch to cash basis if I'm not already on it?

Probably already on it. Cash basis became the default accounting method for sole traders and partnerships without corporate partners from 6 April 2024. For MTD purposes cash basis is materially simpler — quarterly updates just summarise money received and money spent in the period. Accruals basis requires tracking debtor and creditor positions every quarter, which is real work. If you're already on cash basis, stay there. If you switched to accruals for a specific reason (financing requirements, complex stock), check whether that reason still applies before adding accruals overhead to every quarterly update.

Sources & further reading

All thresholds, deadlines, and penalty figures cited on this page come from official HMRC and gov.uk publications. Tax facts are public domain; any directly-quoted HMRC text would be reused under the Open Government Licence v3.0 with attribution.