The AOW is not designed to be a standalone income for retirees in the Netherlands and should be supplemented by a company/occupational pension (labour-based pension) or private pension scheme, or both.
The pension built up via your employer. If you leave the Netherlands, you might be able to transfer the pension you built up here to a pension fund in your new country. This is called international value transfer of your pension. It is advised to ask an expert to check if this is possible and if it is beneficial for you. He can also inform you about the steps to take.
For more information on this subject please visit the following website:
To summarise: If you have lived or worked in the Netherlands, you will receive a state pension (Pillar 1) which will be calculated proportional to the number of years that you have worked in the Netherlands. If you receive pension benefits from a work pension fund (Pillar 2) depends on if you signed a pension agreement with your employer and if you keep track of your Dutch pension scheme. How much you will receive depends on your salary and the number of years you worked. Should you die, your partner may be entitled to a part of your Dutch pension. If you are not married, it is essential to inform the pension fund you want your partner to be egilible of a part of your pension after your death. If you fail to do so, your partner may not be egilible to receive any money from the pension fund. You will only receive benefits from personal/individual pension (Pillar 3) if you took out a private pension.