Declaring Income — Strategies & Pitfalls

There's no box that auto-fills this one for foreign pension income — you have to calculate and apply it yourself, or you'll quietly overpay income tax on your UK pension every year.

Your UK Government Service Pension pays zero French income tax — but the full gross amount still counts toward the figure France uses to decide your CAF eligibility, property tax relief, and social charges band.

One partner's S1 doesn't automatically halve your household's social charges — you have to isolate their share, income type by income type, or the tax office assumes it applies to nobody.

A valid CPAM-registered S1 doesn't lower your French tax bill but one missed box on Form 2042-C means you pay full social charges.

Kept a buyer's deposit after they walked away from your house sale? It's taxable — just not as a capital gain. Here's the category that actually applies.

Selling a French property that isn't your main home? You could owe 36.2% on the gain — but the longer you owned it, the less you pay. Here's the actual calculation.

Selling old furniture, a car, or clothes on Vinted? Almost none of it is taxable — but one category catches people out completely. Here's the actual line.

Selling a UK property while living in France? You pay HMRC first, then declare it in France — but the French tax credit doesn't cover everything. Here's what's actually due.

Selling your main home in France and not buying another? The gain is still completely tax-free — no reinvestment required. Here's the exemption that actually applies.

France's CatNat natural disaster scheme doesn't pay out for wildfire damage — fire is covered separately, under different rules and a different deadline. Here's what actually applies, and the €5,000 penalty some owners don't know about.

A new French tax status lets landlords deduct up to 80% of a rental property's price from taxable rental income. Here's how the statut du bailleur privé actually works, and the open question for UK buyers.

Some French communes can now charge up to 60% extra council tax on second homes. Here's how the zone tendue surtax actually works, which areas have adopted it, and why it barely touches the regions where most UK expats own property.

Securities losses carry forward 10 years. Property losses don't carry forward at all. Crypto losses can't even offset a different asset type. Here's the breakdown.

Premium Bonds are tax-free in the UK — but that exemption doesn't travel with you. If you're a French tax resident, every win is declarable, however small.

If you're PACS'd or married in France, your capital gains are pooled as one household total — not split by who sold what. Here's the one exception that trips people up.

A new French rule can block citizenship applications where most income comes from abroad — including UK pensions, even if you already pay French tax on them.

Selling power to EDF? Whether you owe tax depends on your installation's power rating, not your income. Here's exactly where the line falls.

Hosting World Cup 2026 fans in your French property? The furnished-let tax allowance just dropped to 30%, and local mairie registration is required before you list.

If you're a French tax resident with a UK bank account, ISA or SIPP, you must declare its existence every year — even with no income. Here's exactly how, and what it costs if you don't.

The tax allowance on unclassified French holiday lets was cut from 50% to 30% in 2026. One administrative step — getting your property officially classified — restores the better treatment. Here's how.

A pension lump sum or one-off windfall can push you into a much higher French tax bracket in a single year. France has a legal mechanism to prevent this — and most people don't know it exists.

Most of the ways to reduce your French tax bill are perfectly legal — and France won't tell you about them. Here are the five levers that UK expats most commonly miss.

If you've worked in France and are entitled to a French pension, claiming it could wipe out thousands in social charges savings each year. This guide explains the legal basis for deferring indefinitely, what it actually saves you, and the traps that trigger the process without you realising.

Wise interest and cashback is taxable income in France. Here's exactly how to declare it, how the Belgian withholding tax credit works, and what most people miss entirely.

If you don't have an S1, you must actively declare your pension income for social charges every year. Most people don't — and three years later, Impôts sends the bill.

UK expats in France can still build qualifying years toward a UK State Pension through voluntary contributions — but the rules changed dramatically in April 2026. This guide explains who qualifies, what it costs, and the France-specific aggregation advantage.

DWP sometimes refuses S1 applications on grounds of French pension eligibility — a position that is contrary to European law. This guide explains the legal basis for challenging the refusal, the exact wording to use, and how to get the result you are entitled to.