How does UK State Pension, National Insurance and tax work for Zimbabweans leaving the UK?

If you've worked in the UK and plan to return to Zimbabwe or split your time between both countries, your UK National Insurance (NI) record matters for your future State Pension. Mandatory NI contributions stop once you leave the UK and end UK employment, but you can continue building your entitlement through voluntary contributions from abroad. Until 5 April 2026, Class 2 voluntary NI was available to those employed or self-employed abroad at a low weekly rate, alongside Class 3 at a higher rate. From 6 April 2026, HMRC abolished Class 2 for anyone living outside the UK, meaning Class 3 is now the only option for protecting your State Pension record while overseas, at £17.45 per week in 2026/27 (previously quoted as £17.75/week in some sources - check HMRC's current published rate before paying). You apply using form CF83. Eligibility has also tightened. From April 2026, new applicants for voluntary Class 3 contributions must have either lived in the UK for 10 continuous years in a row, or already built up at least 10 qualifying years of UK National Insurance contributions - replacing the previous 3-year test. You need 35 qualifying years in total for the full new State Pension, which was £241.30 per week in 2026/27. Before paying anything, check your NI record and any gaps via your personal tax account on GOV.UK, and get a State Pension forecast to see whether voluntary contributions are worthwhile for you. On tax: if you're not required to file a self-assessment return and are leaving the UK, form P85 lets you notify HMRC of your departure and claim any income tax refund due for that tax year. National Insurance refunds on leaving are generally not possible. For pensions, the UK-Zimbabwe Double Taxation Convention governs how certain government service pensions are taxed, generally taxable only in the state paying them unless the recipient is a resident and national of the other state. Private and occupational pension income is treated differently: if you later return to the UK and draw a Zimbabwean pension, it's usually taxed as foreign pension income on a UK tax return, since tax isn't withheld at source abroad. Given the complexity of cross-border pension and NI rules, especially after the 2026 changes, consult HMRC's NI38 guidance or a cross-border tax adviser before making decisions. Sources: https://www.kaeltripton.com/uk-national-insurance-when-leaving, https://www.litrg.org.uk/international/national-insurance-cross-border-situations, https://www.greenbacktaxservices.com/blog/uk-ends-class-2-national-insurance-expats, https://www.litrg.org.uk/international/leaving-uk/uk-tax-refunds-people-leaving-uk-or-living-overseas, https://assets.publishing.service.gov.uk/media/5a7f6467ed915d74e33f6262/uk-zimbabwe-dtc191082_-_in_force.pdf