MTD multiplies the work.
Calceum absorbs it.
From April 2026, MTD for Income Tax puts your sole trader and landlord clients on quarterly digital filing — four updates and a final declaration, every year, for every affected client. Calceum runs that cycle inside the platform your practice already works in. HMRC-recognised, and included for every practice on Calceum.
The maths is the problem.
MTD doesn't make tax harder. It makes it more frequent — and frequency is a capacity problem. Staffing for it is one answer. Absorbing it into the platform is the other.
Submissions per affected client, per year
Four quarterly updates plus a final declaration.
Yearly submissions for a practice with 100 affected clients
Work that lands in the same four deadline windows.
Waves of clients between April 2026 and April 2028
Each threshold drop pulls more of your list in.
Three waves. Each pulls in more of your client list.
Qualifying income is self-employment and property income combined, measured from the previous tax year. The thresholds only move one way.
Sole traders and landlords with qualifying income over £50,000. The first wave — and for most practices, the largest.
Clients with qualifying income between £30,000 and £50,000 join the quarterly cycle.
The planned £20,000 threshold brings in the long tail of smaller clients.
The quarterly cycle, run end-to-end.
Records flow in
Clients keep digital records in the app, or stay in the spreadsheets they already use with digital links into Calceum. Chasing missing records is handled by the platform, not your inbox.
Calceum prepares the quarter
Income and expenses roll up into the figures HMRC expects, with digital links maintained from record to return — no copying, no re-keying.
Your team reviews and submits
One screen to review and submit through HMRC’s official MTD APIs, with a full submission log and deadlines tracked across every client on the platform.
Included with Calceum.
Not sold separately.
Calceum isn't consumer software, and MTD isn't an add-on. It's part of the platform, included in your practice's fee — no per-client licences, no separate tool for clients to buy, nothing to resell.
- HMRC-recognised software
- Self-employment, UK & foreign property
- No per-client licences
- Your brand in front of your clients
Calceum is available through accounting practices, not directly to individuals. If you want your MTD handled this way, ask your accountant about Calceum — or introduce us.
hello@calceum.comMTD,
answered.
What practice owners ask us about MTD for Income Tax. Something else on your mind? Book a 15-minute conversation.
Sole traders and landlords, based on qualifying income — self-employment and property income combined, from the previous tax year. Over £50,000 from April 2026, over £30,000 from April 2027, and over £20,000 from April 2028 (planned). Calceum helps you map which clients fall into each wave.
Ready to get
the hours back?
Book a 15-minute conversation. We'll map where your practice loses the most time and show you exactly what Calceum would take off your team's plate.