What the window does, and what it does not do
The window protects eligibility, not price. From 6 April 2026 voluntary Class 2 contributions were abolished for periods spent living or working outside the UK, and for 2026/27 onwards most people overseas can only pay Class 3. At the same time the entry test for new overseas applicants rose from 3 years to 10: you now need either 10 years of UK residence in a row or 10 years of paid qualifying contributions, and National Insurance credits do not count. The transitional rules let two groups sidestep that tougher test for a limited time. They do not let anyone carry on at the Class 2 rate for time abroad after 5 April 2026. HMRC's policy paper says around 46,000 people were paying voluntary Class 2 from abroad, and HMRC wrote to them in July 2026 about their options. Our voluntary National Insurance from abroad guide sets out the full decision path.
The two transitional routes
If you were already paying Class 2 from abroad, your Class 2 liability closed with the 2025/26 tax year. The concession is that you can apply to pay Class 3 without satisfying the new 10-year test, as long as the application is submitted before 6 April 2027. You can also still pay Class 2 for gaps before 6 April 2026 if you met the old conditions, within the normal time limits. If instead your CF83 was already in the pipeline, an application made on or before 5 April 2026 for 2024/25 or 2025/26 keeps the previous rules, including the old 3-year test, provided the contributions are paid on or before 5 April 2027 and any 2026/27 application is made by the same date. That treatment stops if you return to live or work in the UK. Existing Class 3 payers carry on unchanged. The leaving the UK tax guide covers the rest.
What to do before 6 April 2027
Check your State Pension forecast first. If you are already on course for 35 qualifying years, extra years may add nothing; if you were contracted out before 2016, verify the effect of each year. Do not cancel a Class 2 direct debit until any final collection for 2025/26 has cleared and HMRC has confirmed your position in writing. Then submit the CF83 online well ahead of the April 2027 deadlines and keep evidence of the submission date, because that is what counts, not the date HMRC processes it. Even at the Class 3 rate the maths usually works: one extra qualifying year typically adds roughly £358 a year to the new State Pension, so a £956.80 year is normally recovered within about three years of retirement. Over State Pension age, or within 6 months of it, HMRC cannot process a CF83 and directs you to the International Pension Centre. Our expat Self Assessment guide covers your UK filing once abroad.