Getting Started

What is Calceum?

Calceum is HMRC-recognised Making Tax Digital (MTD) software designed for self-employed individuals and landlords with straightforward tax affairs. It lets you keep using your spreadsheet for record-keeping while meeting all MTD compliance requirements.

Who is Calceum for?

Calceum is designed for:

Self-employed sole traders with income over £50,000 (April 2026), £30,000 (April 2027), or £20,000 (April 2028)
Landlords with UK or overseas rental property income
Anyone who prefers spreadsheets over complex accounting software

How it works

Connect to HMRC - Securely link your HMRC account using Government Gateway 2. Record your transactions - Use our Excel template or link your existing spreadsheet 3. Upload and review - Upload your spreadsheet and review the summary 4. Submit to HMRC - Send your quarterly update with one click

Key features

Spreadsheet-based

Keep using Excel or Google Sheets. No need to learn new software.

HMRC recognised

Listed on HMRC’s official register of MTD-compatible software.

Digital links

Automatic digital links from your records to HMRC - no copy-pasting.

Deadline tracking

Never miss a quarterly submission with built-in reminders.

What you can do with Calceum

Quarterly submissions

Submit your income and expenses to HMRC four times a year. Calceum handles the technical complexity - you just upload your spreadsheet.

Year-end filing

Complete your annual submission and final declaration when the tax year ends.

Multiple income sources

Track self-employment income, UK property, and foreign property all in one place.

Next steps

Create an account

Join the pilot to get started with Calceum.

Download the template

Get our spreadsheet template to start recording transactions.

Learn about MTD

Read our MTD overview to understand the requirements.