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Retiring after a career split across two countries
Each country pays the share it owes you. Nothing is lost, and nothing is centralised either.
The pro-rata principle
A European career does not merge into a single pension. Each country you contributed in pays its own share, computed on its own rules and years. You will therefore draw several pensions, on different dates and different scales. Periods completed elsewhere still count towards eligibility: that is aggregation, which stops you losing a pension for want of enough years in one country.
One claim, several institutions
The claim is filed in the country of residence, which forwards it to the other schemes involved. So you do not write separately to Luxembourg's CNAP and to your national fund — but the delays stack up, and a cross-border file needs preparing far earlier than a domestic one. Gathering your career statements from each country a few years ahead avoids most of the unpleasant surprises.
Why the Luxembourg share weighs heavily
The Luxembourg scheme is among Europe's more generous, and it sits on salaries that are themselves high. A few years of contributions in the Grand Duchy therefore often weigh more than the same span elsewhere. It is one of the strongest long-run arguments for cross-border work — and a reason to check your Luxembourg quarters as carefully as the rest.
Where you will be taxed
How pensions are taxed depends on the treaty between Luxembourg and your country of residence, and it does not necessarily follow the rule that applied to salary. A Luxembourg pension may stay taxable in Luxembourg where the salary already was, or switch — the answer varies by country and by the nature of the scheme. It is the point to have checked by name before choosing where to retire.
