What is Split-Year Treatment?

Full Definition

Split-year treatment is a statutory mechanism within the Statutory Residence Test (SRT) framework that allows a UK tax year to be divided into a resident part and a non-resident part when an individual moves to or from the UK part-way through the year. Without it, UK tax residence is normally determined for the whole tax year, which could result in a person who arrives in the UK in January being taxed as a UK resident for the full year from April. There are eight defined cases in which split-year treatment can apply: three covering individuals leaving the UK (Cases 1 to 3) and five covering individuals arriving in the UK (Cases 4 to 8). The most common departure case is Case 1, which applies when a person leaves the UK to work full-time abroad. The most common arrival cases are Case 4 (starting to have a home in the UK) and Case 8 (returning to the UK having been non-resident). Split-year treatment is not automatic in all cases — it must be claimed on the Self Assessment tax return for the relevant year. During the overseas part of a split year, the individual is generally treated as non-resident, meaning foreign employment income and foreign investment income arising in that period is not subject to UK tax (subject to double taxation agreements). UK-source income remains taxable throughout. The treatment does not affect ISA or SIPP eligibility rules, which have their own residency requirements. The split-year rules are contained in Schedule 45 of the Finance Act 2013.