Side income and assets
Written by PAYEWise editorial team, plain-English tax writers working from Revenue sources. Tax review: pending appointment of a named tax-qualified reviewer. Reviewed 28 October 2026.
Quick answer
Net profit of 5,000 euro or less and gross rent of 30,000 euro or less: declare it in the Return and Revenue collects the tax by reducing your credits. Above either limit you are a : register for Income Tax and file on by 31 October, paying .
A rental loss can be carried forward against future Irish rental profits only, not against your salary. Losses on a property let below market rent to a relative are ring-fenced to that property.
Last reviewed 2026-10-28 (awaiting sign-off by a named tax-qualified reviewer). Every factual tax rule on this page is backed by a dated Revenue source. Spotted an error? Use the contact page.
Reviewed 2026-10-28. Figures use 2026 rules unless a year is stated.