US–Denmark
In force since 2008. Danish periods can carry you over the US 40-credit line — if you hold six US credits of your own.
Pensionaut
A cross-border pension estimator for people whose working life spans borders. Enter your work history once and see one consolidated retirement-income estimate — with the per-country breakdown behind it.
Nine countries covered — United States, United Kingdom, Denmark, Bulgaria, Germany, Turkey, Mexico, Romania and Russia — across US totalization agreements, EU Reg. 883/2004, the UK–EU TCA Protocol and the German–Turkish agreement. Eight produce an estimate; the Turkish and Russian figures are shown in their own currency rather than folded into a euro total. Mexico is the exception, covered for what it can tell you rather than a figure: its pension is a private account balance no tool can see, and it says so instead of guessing.
Whether your years in one country can carry you over the qualifying line in another depends entirely on the corridor between them. Each page below answers that for one pair — what is in force, what combines, and what does not.
In force since 2008. Danish periods can carry you over the US 40-credit line — if you hold six US credits of your own.
In force since 1979. German contribution years count toward the US 40-credit test and build a German pension of their own.
Signed in 2004 and never brought into force: US and Mexican periods do not combine in either direction.
In force since 1 September 2026 — the 31st US agreement. Romanian periods now count toward the US 40-credit test.
In force since 1985. UK National Insurance years count toward the US 40-credit test; 35 of them buy a full new State Pension.
Sourced, plain-language writing on the machinery behind the numbers — EU coordination, US totalization, and the gaps between them.