Number of tax returns with more than just salary information

Summary

The requester asked for statistics on Isle of Man tax returns for the 2023/2024 year to assess administrative burdens and potential savings from a UK-style self-assessment system. The Treasury disclosed that 61,225 returns were submitted, with 86.3% containing income sources or deductions beyond simple employment income.

Key Facts

• A total of 61,225 tax returns were submitted for the 2023/24 tax year.
• Approximately two-thirds of the tax returns were submitted online.
• 13.7% of returns recorded employment income as the only source of income.
• 86.3% of returns contained more than one income source and/or tax deductions.
• The request was formally closed by the Treasury on 12 February 2026.

Data Disclosed

• 61,225
• 13.7%
• 86.3%
• 2023/24
• 2026-01-22
• 2026-01-29
• 2026-02-12
• 5247929

Original Request

I would like to know how many tax returns are submitted annually on the IOM, and out of those returns, how many (or what percentage) just contain information submitted by an employer with regards to income, and how many continue additional income. What I am trying to understand is the administrative burden placed on the individual tax returns department to assess if significant savings of personnel could be made, if a system similar to the UK was implemented where only people with additional income on top of their salary have to submit a self assessment tax return. Can this please cover the previous tax year, 2023/2024.