What the UK stops taxing when you leave
Move to Ireland and, provided your UK days and ties are low enough under the Statutory Residence Test, you become non-UK resident and your foreign income generally leaves UK tax. Split-year treatment can divide the year you move into a UK part and an overseas part, so the change often takes effect from around your departure date rather than the following 6 April. It is not automatic: you must meet one of the specific cases and claim it on the SA109 residence pages. Tell HMRC you are leaving with form P85 or through your Self Assessment return.
What stays UK-taxable
UK-source income keeps its UK tax charge. Rent from a UK property remains taxable under the Non-Resident Landlord Scheme, with 20% deducted at source unless you apply for gross payment on form NRL1. Gains on UK property must be reported and any tax paid within 60 days of completion. Pay for days physically worked in the UK often stays taxable here too. And if you were UK resident in at least 4 of the 7 tax years before leaving and return within 5 years, the temporary non-residence rule brings gains realised while you were away into charge in the year you come back, an easy trap given how simple returning from Dublin is.
The Irish side of the move
Ireland levies its own taxes on you as an Irish resident, so the move is a handover between tax systems, not an escape. The UK-Ireland double tax treaty decides which country taxes each item, and it reallocates most ordinary UK occupational and private pensions to Ireland while leaving government-service pensions with the UK. As at mid-2026 Ireland still offered a remittance basis to non-Irish-domiciled residents, with no time limit or annual charge, but that is an Irish point to confirm with a local adviser. The full picture, including a worked example of the 5-year trap, is in our Ireland country guide.
