Most au pairs are between 18 and 30 years old. But some countries have slightly different age requirements for au pairs. Therefore an au pair should always check the specific regulations for the host country before finalising arrangements for an au pair stay.
| Australia | 18 - 30 years old |
| Austria | EU: 18 - 28 / Non-EU: 18 - 27 years old |
| Belgium | 18 - 25 years old |
| Canada | 18 - 30 years old |
| Denmark | 18 - 29 years old |
| Finland | 17 - 30 years old |
| France | 17 - 30 years old |
| Germany | EU: 17 - 30 / Non-EU: 18 - 26 years old |
| Iceland | 18 - 25 years old |
| Ireland | 18 - 30 years old |
| Italy | EU: 17 - 30 / Non-EU: 18 - 30 years old |
| Luxembourg | 18 -30 years old |
| Netherlands | 18 - 30 years old |
| New Zealand | 18 - 30 years old |
| Norway | 18 - 30 years old |
| South Africa | 18 - 24 years old |
| Spain | 17 - 30 years old |
| Sweden | 18 - 30 years old |
| Switzerland | EU: 17 - 30 / Non-EU: 18 - 25 years old |
| United Kingdom | 18 - 30 years old |
| USA | 18 - 26 years old |