UK pensions in France: what British retirees need to know

Pensions are where a comfortable French retirement is either quietly secured or quietly eroded — and, like healthcare, it's an area where honest guidance is oddly scarce. The advice that exists tends to come from firms hoping to manage your money. So here's the plain version, with the genuinely important bits — the ones that turn on timing and which type of pension you hold — pulled to the front.

As with so much in cross-border life, the muddle comes from assuming the UK rules travel with you. They don't. Two things change the moment France becomes your home: whether your pension keeps rising, and which country gets to tax it. We'll take them in that order, then deal with the lump-sum trap that catches people out.

First, the good news: France doesn't freeze your pension

You may have heard horror stories about British pensioners in Australia or Canada whose State Pension is "frozen" — stuck forever at the rate it was when they moved, while UK residents get an annual rise. That's real, and it's brutal over time. But it is a country-by-country rule, and France is on the right side of it.

Because France is in the European Economic Area, the UK State Pension paid to a French resident is uprated every year under the triple lock — the higher of inflation, average earnings growth, or 2.5%. From April 2026 the full new State Pension is £241.30 a week (about £12,547.60 a year), and as a French resident you get each year's increase just as you would in Britain. Over a long retirement that compounding is worth tens of thousands of pounds compared with a frozen country. So on this point, you can relax — moving to France protects your pension's value rather than eroding it.

The part that changes: who taxes your pension

Here's the principle to hold onto. France taxes its residents on their worldwide income — so once you're French tax-resident, France in principle wants to tax all of it. But the UK–France double tax treaty overrides that for certain income, deciding which country actually gets each slice so you're never taxed twice on the same money. For pensions, it sorts them into two boxes.

Box one — taxed in France (most pensions)

Under the treaty, your UK State Pension and your private and workplace pensions — personal pensions, SIPPs, and most defined-contribution and defined-benefit occupational schemes — become taxable in France once you're resident, not in the UK. You declare them on your French return, converted to euros, and they're added to your other income and taxed at French rates.

One point that surprises people: despite its name, the UK State Pension is not a "government" pension for treaty purposes — it's treated as an ordinary pension and taxed in France like the rest.

Box two — taxed in the UK (government-service pensions only)

There's a specific carve-out for government-service pensions: pensions from public-service employment — NHS, civil service, military, police, teachers, and other Crown service. These stay taxable in the UK, even when you live in France.

But — and this trips people up — you still have to declare them on your French return. They won't be taxed again in France, but France uses them to work out your taux effectif (effective rate): the rate it applies to your French-taxable income is calculated as if the UK pension counted, which can nudge your other income into a higher band. So the government pension is "UK-taxed" but not invisible to France.

The lump-sum trap — the one that genuinely costs people

This is the mistake worth crossing the room to avoid. In the UK you can usually take 25% of your pension pot as a tax-free lump sum (the "pension commencement lump sum"). It's one of the most prized features of the UK system — and its tax-free status does not survive the move to France.

If you take that lump sum after you've become French tax-resident, France treats it as ordinary taxable income — potentially at marginal rates up to 45%, plus possibly social charges. The "tax-free" promise is a UK rule, and France simply doesn't recognise it. People who take their lump sum a few months too late, having already moved, can face a tax bill that would have been zero had they acted before leaving.

There are two ways to handle it, and both require forethought:

• Take it before you go. If you draw the tax-free lump sum while still UK tax-resident, it keeps its UK tax-free status. For many people, this is the clean answer — but it's a decision to make before the move, not after.
• Use France's flat-rate option. If you take your entire pension pot as a single lump sum (not in slices), France offers a fixed 7.5% income tax rate on it (after a 10% allowance) under specific conditions — which can be very favourable. But it's all-or-nothing, condition-heavy, and needs proper structuring and documentation. Not a DIY move.

The thread running through both: this is a timing decision, and timing is the one thing you can't fix retrospectively. If a lump sum is part of your plan, it belongs in the conversation you have before you become resident.

Topping up your State Pension — the 2026 change

If you have gaps in your National Insurance record, you've long been able to pay voluntary contributions to boost your eventual State Pension — and for those abroad, the cheaper Class 2 rate was often superb value. From 6 April 2026, that changed: for overseas periods, voluntary Class 2 is generally no longer available, leaving the more expensive Class 3, and new applicants face a 10-year UK residence/contributions test. There are transitional rules for existing Class 2 payers, with their own deadlines.

The practical takeaway: if topping up your record is part of your retirement maths, check your NI record early (at gov.uk/check-national-insurance-record) and get advice on what you can still do — the cheap window has largely closed, and the remaining routes are time-sensitive.

A note on the French tax return itself

Once resident, you declare your worldwide pension income annually on the French return — UK pensions go on the foreign-income form (2047) and carry across to the main return (2042), converted to euros at the rate when received. Government-service pensions are declared in the section that applies the taux effectif rather than taxing them again. It's more involved than a UK return, and the first one especially is worth doing with help — getting the treaty treatment right from year one saves unpicking it later.

So, what should you actually do?

The headline reassurance stands: France won't freeze your pension, and the treaty means you won't be taxed twice. But three things genuinely need handling, and two of them only work if done in advance:

• Before you move: decide on any tax-free lump sum while it's still tax-free, and check whether topping up your NI record still makes sense under the new rules.
• As you become resident: apply for your NT code so HMRC stops taxing the pensions France will now tax, and — if you're at pension age — get your S1 to kill the social charges.
• Each year after: declare everything correctly, keeping government-service pensions in their own box.

This is the part of moving to France where a single conversation with a cross-border financial adviser or a French accountant, before you go, reliably pays for itself many times over — because nearly every expensive pension mistake here is a timing mistake, and timing is the one thing advice can still fix while there's road ahead of you.

This guide offers practical, general information, not financial, tax, pension, or legal advice. Pimpernel are not financial advisers, accountants, or tax specialists, and we have nothing to sell you. Pension taxation, the double tax treaty's application, French tax rates and social charges, National Insurance rules, and the figures quoted all change, and how they apply depends entirely on your own circumstances — your pension types, residence, age, income, and timing. Pension and lump-sum decisions can be irreversible and costly to get wrong. Always take advice from a qualified cross-border financial adviser, a French accountant, or HMRC before acting.