Making Tax Digital Starts in 24 Days — What UK Developers Need to Know

#freelancing #webdev #career #productivity

Making Tax Digital Starts in 24 Days — What UK Developers Need to Know

If you're a freelance developer in the UK earning over £50,000, the way you report your taxes is about to fundamentally change.

From 6 April 2026, Making Tax Digital for Income Tax Self Assessment (MTD for ITSA) becomes mandatory. No more annual tax returns filed once a year in January. Instead: quarterly digital submissions, compatible software, and digital record-keeping.

Here's what you actually need to know.

Who's affected?

From April 2026: Self-employed individuals and landlords with qualifying income over £50,000.

From April 2027: The threshold drops to £30,000.

"Qualifying income" means your gross self-employed income before expenses. If you invoice £55k but your profit after expenses is £30k, you're still caught by the £50k threshold because it's based on turnover, not profit.

What changes?

Before MTD

Keep records however you want (spreadsheets, shoeboxes, whatever)
File one annual self-assessment tax return by 31 January
Done

After MTD

Keep digital records using MTD-compatible software
Submit quarterly updates to HMRC (every 3 months)
Submit an End of Period Statement after the tax year
Submit a Final Declaration (replaces the annual return)
HMRC can see your numbers in near-real-time

That's 5 submissions per year instead of 1.

The quarterly deadlines

For the 2026/27 tax year:

Quarter	Period	Deadline
Q1	6 Apr – 5 Jul 2026	5 Aug 2026
Q2	6 Jul – 5 Oct 2026	5 Nov 2026
Q3	6 Oct – 5 Jan 2027	5 Feb 2027
Q4	6 Jan – 5 Apr 2027	5 May 2027

Miss a deadline? There's a new points-based penalty system. Each late submission earns a point. Hit the threshold (4 points for quarterly submissions) and you get a £200 penalty. Points expire after 24 months of compliance.

What software do you need?

HMRC maintains a list of MTD-compatible software. The main options:

Free/cheap:

HMRC's own free tool (basic, but it works)
Spreadsheets with bridging software

Popular paid options:

FreeAgent (~£25/month) — popular with UK freelancers
Xero (~£15-42/month)
QuickBooks (~£12-35/month)
Sage (~£12-33/month)

For developers who want to build their own:

HMRC has MTD APIs — you can build your own submission tool
Several open-source bridging tools exist on GitHub

What to do right now (if you earn over £50k)

Sign up for MTD — Go to HMRC's MTD signup page and register. Do this before April 6.
Choose your software — Pick something MTD-compatible. If you're already using accounting software, check if it supports MTD submissions.
Digitise your records — If you're still using spreadsheets or paper, move to digital record-keeping now. Don't wait until Q1 is due.
Understand the new penalty system — The old flat-rate penalties are gone. The new system is points-based and arguably fairer, but you need to know how it works.
Check if your accountant is ready — If you use one, confirm they're set up for MTD submissions on your behalf.

What if you earn under £50k?

You're not affected yet. But the threshold drops to £30k from April 2027, and HMRC has signalled further reductions. Start getting your digital records in order now — it's coming for everyone eventually.