Praise be to Allah.
The money that you are going to take after five years will be composed of the capital – which is the money paid by the company – and the riba-based profits – which are known as interest. Because riba-based money is not permissible for you, you have no right to take any more than the capital, and you have to leave the interest to the bank, because Allaah says (interpretation of the meaning):
“but if you repent, you shall have your capital sums”
See also question no. 22392.
If the bank insists on your taking this haraam interest, then you should take it and you have to get rid of it by giving it to charity; it is not permissible for you to keep it or benefit from it in any way. See question no. 292.
And Allaah knows best.