Ref. No. 2524/45-3853
In the name of Allah the most Gracious the most Merciful
The answer to your question is as follows:
You are a Muslim and bound by Shariah, it is not permissible for you and all Muslim participants to take fixed profit, similarly it is not permissible to give fixed profit to a person be it a Muslim or non-Muslim; since, both taking and giving interest are forbidden for a Muslim, therefore a Muslim cannot give a fixed interest to even a non-Muslim.
And Allah knows best
Darul Ifta
Darul Uloom Waqf Deoband