If you've worked in more than one country, there's a comforting assumption most people make without noticing: that all your years are quietly stacking up somewhere, and one day they'll be added together into a pension. They won't. There is no single world pension, no central ledger, no institution whose job is to see your whole career. Each country pays you separately, under its own rules — and whether your time in one country can help you qualify in another depends entirely on which corridors between them happen to connect.
Some connect. Some are dead ends. Knowing which is which is the difference between claiming everything you're owed and leaving money sitting unclaimed in a country you've half-forgotten.
There isn't one rulebook — there are several, at once
The reason this is confusing is that more than one system can apply to the same person at the same time, and they work differently. Here are the ones that matter.
EU coordination. If you've worked in EU or EEA countries, a single regulation — 883/2004 — coordinates them. Your periods across all of them are added together to check whether you qualify in each, so a three-year stint that would otherwise be too short to count isn't lost. Then each country pays its own share. This is the most generous kind of connection, and it's automatic between member states.
US totalization agreements. The United States has around thirty bilateral agreements — with most of Europe, plus Canada, Japan, South Korea, Australia and others. If you're short of the forty credits (about ten years) you need for a US benefit, an agreement lets you combine your foreign periods to qualify — as long as you have at least six US credits. The catch: the US still pays only on your US earnings, pro-rated down. It's a partial benefit, not a full one.
The UK and the EU. After Brexit, a dedicated protocol preserves the ability to aggregate periods between the UK and EU countries — so the connection survived, even though the UK left the coordination system.
Older bilateral agreements. Some countries have long-standing one-to-one deals outside any bloc — the German–Turkish agreement, in force since 1965, is the oldest of its kind. These aggregate periods between the two named countries and nowhere else.
And then the dead ends. Where no agreement is in force, there is no connection at all. Your periods don't transfer, and neither country's system knows the other exists. Two people can have identical-looking careers and very different outcomes depending on which of their corridors are live.
Why "there's an agreement" can still mean nothing
The most expensive misunderstanding in this whole area is the gap between signed and in force. An agreement only does anything once both countries have brought it into effect — and that final step doesn't always happen.
The clearest example is the United States and Mexico. The two signed a totalization agreement in June 2004. It was never brought into force, and more than twenty years later Mexico still isn't on the list of agreements the US actually operates. So for anyone who split a career between the two, the agreement is real as a piece of paper and irrelevant to anything that pays them: US and Mexican years don't combine in either direction. "There's an agreement between the US and Mexico" is a sentence that is technically true and practically false, and a lot of confident, wrong advice lives in that gap. We've written that corridor up in full on the US–Mexico page.
There's a subtler dead end too: a corridor can be an agreement on paper but broken in practice. A pension you're entitled to in a currency that can't easily be moved or converted — because of sanctions, or because the money simply can't reach you across a closed banking channel — is an entitlement you may not be able to collect. Being owed a pension and being able to receive it are two different things.
What this means for you
The practical upshot is that you can't reason about your pension one country at a time. What matters is the shape of your particular career — which of your countries connect to which, and where the dead ends are.
Someone who worked nine years in the US and five in Denmark is in good shape: Denmark has a US agreement, so those Danish years can carry them over the US qualifying line. Change Denmark to a country with no US agreement and the same nine US years suddenly pay nothing, with no way to bridge the gap. Same person, same nine years, completely different result — decided entirely by which corridor was live.
So before you assume anything: map your corridors. For each pair of countries you've worked in, find out whether an agreement is in force — not signed, not proposed, in force. Check your record with each country's institution directly, because none of them will show you the combined picture. And if you'd rather not assemble it by hand, that's the exact gap our estimator is built to fill: you enter the countries and years you've worked, and it works out which ones connect, which don't, and what the whole thing adds up to.
The countries you worked in are fixed. Which of them count together isn't obvious — but it's knowable, and it's worth knowing before you retire, not after.
Free, and nothing is saved unless you ask.
New to how the pieces fit together? Start with How your pension works when you've worked in multiple countries.
Sources
- EU state pensions abroad — Regulation 883/2004 (Your Europe)
- EU social security coordination (European Commission)
- SSA — Totalization Agreements (the list in force, and the 40/6-credit rules)
- SSA — International Programs: agreements overview
- GAO — Proposed US–Mexico totalization agreement (GAO-03-993)
- EU–UK Trade and Cooperation Agreement (Protocol on Social Security Coordination)
- Deutsche Rentenversicherung Knappschaft-Bahn-See — 60 years of the German–Turkish social security agreement (in force 1 November 1965)
Confirm specifics with the relevant national institutions — SSA and each country's own pension authority — before making decisions.