What the UK still taxes after you leave
UK residence is decided by the Statutory Residence Test, which weighs your UK day count against ties such as home, work and family. In your departure year, split-year treatment can often tax you as non-resident from the date you leave. Once non-resident, UK-source income stays in the UK net: rental profits fall within the Non-resident Landlord Scheme, most UK pensions remain taxable subject to the treaty, and disposals of UK property must be reported with any non-resident CGT paid within 60 days. Two tails matter. If you return within roughly 5 years, the temporary non-residence rules can claw certain income and gains back into UK tax, and residence-based inheritance tax can keep your worldwide estate in scope for 3 to 10 years after departure.
What Italy taxes when you arrive
Italy taxes its residents on worldwide income at ordinary rates of 23 to 43 per cent, so the move swaps one tax net for another rather than removing tax altogether. For wealthier arrivals, Italy offers a flat-tax regime that substitutes a fixed 300,000 EUR a year for ordinary Italian tax on foreign income and gains, running up to 15 years, provided you were not Italian resident for at least 9 of the previous 10 years. Separate regimes exist for inbound workers and for foreign pensioners moving to southern municipalities. Our guide to moving to Italy from the UK covers the regimes, the qualifying tests and the UK-side steps in detail. Sequencing the two sides properly is what makes the move work.