Making Tax Digital for plumbers: what's actually changing in April 2026

If you're a self-employed UK plumber, the headline news is short. From April 2026, Making Tax Digital for Income Tax Self Assessment (MTD ITSA) becomes mandatory for sole traders earning over £50,000 in gross self-employment income. From April 2027 it drops to £30,000. From April 2028 it drops to £20,000.

That covers most working plumbers running a single van.