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UK split-year treatment: what it means and when to investigate it

UK split-year treatment can divide a UK-resident tax year into a UK part and an overseas part when a statutory case and all its conditions are met. It is not a free choice, and the physical move date is not automatically the statutory split date.

Coverage period
UK statutory framework (Finance Act 2013, Schedule 45). The article states no year-specific figures and does not determine the residence or split-year position of any person; every case, condition and split date depends on the facts of the year in question.
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Whole-year residence comes first

The Statutory Residence Test determines residence for the whole tax year first; only an individual who is UK resident for that year then has to consider the split-year cases. The analysis should not begin by dividing the year at the travel date and working backwards.

Each case has its own conditions

Arrival and departure situations are covered by different statutory cases involving facts such as homes, work, and residence in adjacent periods. If more than one case applies, priority rules determine which case and split date govern.

The split affects later income analysis

A confirmed split can change how foreign income is considered between the UK and overseas parts for many purposes, but it does not itself classify every income item. Preserve payment, earning, service, ownership, and source facts for the downstream rules.

Worked example

Synthetic example: Lee arrives from Boston in August, begins full-time UK work in September, and retains the US home until November.

  • Determine Lee's UK residence for the full tax year under the Statutory Residence Test.
  • Evaluate every potentially applicable arrival split-year case using the required home, work, and adjacent-period facts.
  • Apply the statutory priority and split-date rules before analysing income between any UK and overseas parts.

Arrival and employment dates alone are insufficient to select a split-year case or date in this example.

Split-year investigation order

  • Determine whole-year UK residence first
  • Identify every potentially applicable statutory case
  • Prove every condition with period-specific facts
  • Apply priority rules when cases overlap
  • Use the resulting split only in supported downstream rules

Sources

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