The £30k Line Moves in April 2027 — Your Month-by-Month Prep Plan
Photo: Sebastian Ballard, CC BY-SA 2.0, via Wikimedia Commons
April 2027 feels like a problem for Future You. It isn't. If you're a sole trader with turnover somewhere in the £30,000 to £50,000 band, the next few months decide whether Making Tax Digital for Income Tax (MTD ITSA) turns out to be a mild inconvenience or a panicked weekend with a shoebox of receipts.
The good news: nobody is asking you to become an accountant. You're being asked to keep digital records and send four quarterly updates a year. The bad news: 'digital records' covers a fair bit of ground, and a lot of people leave it until March.
Here's the calmer route.
First, work out whether you're actually in scope
From 6 April 2027, MTD for ITSA becomes mandatory for sole traders and landlords with qualifying income above £30,000. The £50,000 group has been in since April 2026, and the £20,000 tier follows in April 2028.
The word that catches people out is qualifying. It means your gross income from self-employment plus your gross rental income, added together, before a single expense is deducted. Profit is irrelevant.
Take Priya, a freelance graphic designer in Leeds. Her design billings are £24,000. She also lets a small flat above her garage for £9,000 a year. Her qualifying income is £33,000 — so she's in from April 2027, even though her actual profit is nowhere near £30,000.
HMRC generally works out who to contact using your 2025/26 Self Assessment return. If that return showed £30,000 or more of combined self-employment and property income, expect a letter through the door. If it was close to the line, plan as though you're in. Nobody ever regretted being ready early.
What 'going digital' really means
Three moving parts:
- Digital records of your income and expenses, kept as you go rather than reconstructed in January.
- Four quarterly updates sent to HMRC during the year.
- One final declaration after the tax year ends, confirming your overall figures.
The quarterly deadlines are predictable, which is the one mercy in all this:
| Quarter covers | Update due |
|---|---|
| 6 April – 5 July | 7 August |
| 6 July – 5 October | 7 November |
| 6 October – 5 January | 7 February |
| 6 January – 5 April | 7 May |
The final declaration for 2027/28 lands on 31 January 2029. Same date as always, just a different label on the form.
You'll need compatible software. Plenty of off-the-shelf options exist, and if your affairs are simple, spreadsheets paired with bridging software are allowed too. What isn't allowed is the envelope of petrol receipts under the van seat.
The month-by-month plan
November 2026 — check your own numbers
Dig out your 2025/26 return. Add your self-employment turnover to your property income. If the total clears £30,000, you're in. Note the figure down somewhere you'll find it again — it's the number that decides everything.
December 2026 — choose software, not 'a spreadsheet someday'
Shortlist two packages and use the free trials properly. Check three things: whether your bank supports a live feed, whether your accountant can log in, and whether the quarterly update button is somewhere you can actually find it. Ignore any feature you'd never use. You are not running a multinational.
January 2027 — do the dull setup
This is the month for opening balances, sensible expense categories, and a separate bank account for the business if you haven't got one. A dedicated account isn't strictly compulsory, but mixing personal spending with business income is the single fastest way to make quarterly updates miserable.
Also, if you use an accountant, sort out their authorisation now. Agent access isn't automatic and it isn't instant.
February 2027 — backfill and test
Enter January's transactions, then re-enter a couple of past months as practice. Compare the totals with what you'd have written on a tax return. If the numbers don't match, you've found a categorising problem while it's still cheap to fix.
March 2027 — rehearse a quarterly update
Most software lets you prepare an update without submitting it. Do that. Put all four deadlines in your calendar with a reminder a week before each one. If you use an accountant, agree now who submits what — plenty of people assume it's covered and discover in August that it isn't.
April 2027 — go live on the 6th
Your first digital quarter runs from 6 April to 5 July 2027. First update due: 7 August 2027.
Where people come unstuck
Confusing turnover with profit. HMRC wants your income figures, not your bottom line. Two different things, one very common mix-up.
Forgetting the rental income. A single rental property can push you over the threshold on its own. It counts towards qualifying income even if the property made a loss.
Leaving the bank feed uncategorised. A feed that pulls in transactions is not the same as bookkeeping. Someone still has to say what each payment was.
Running personal spending through the business account. Every one of those transactions has to be sorted out later.
Assuming your accountant will handle it. They can, but only with proper access and timely information from you.
Treating the final declaration as optional. It isn't. The quarterly updates don't replace your end-of-year position.
Filing at 23:58 on deadline day. Servers get busy. So do accountants.
Is there any leeway?
If you genuinely can't use digital tools — say, because of your age, disability, location or religious grounds — you can apply for an exemption. HMRC has also signalled a softer approach to penalties in the first year of MTD for newly affected businesses, and late submission penalties run on a points system rather than a flat fine. That's breathing room, not a free pass. Talk to your accountant about your specific situation.
Three things to do this week
- Add up your 2025/26 self-employment and property income. Write the total down.
- Book half an hour with your accountant to confirm your start date and software.
- Put 7 August 2027 in your diary. It'll be here sooner than you think.
