For example: in the case of the old age pension for particularly long-term insured persons, it is 45 years, whereas for the regular old-age pension it is only 5 years.According to European law, the German periods of insurance and the qualifying periods in the other member states are added together in the calculation of these qualifying periods.
If you live in another member state or a country which has an agreement with Germany (agreement country), you can file an application for a German pension through the insurance agency of your respective country; a time limit may apply.
The periods of insurance from a country with which the Federal Republic of Germany has not signed a social security agreement cannot be added to the German periods of insurance to fulfil the eligibility requirements.
In these cases, the requirements for a pension, such as reaching the age limit or being an invalid, are determined entirely by the respective national law.
Always find out about your pension entitlements from the relevant foreign countries in advance.
To calculate your pension, the principle applies that every member state or agreement country pays only the pension from its own insurance periods and according to its own legal provisions.