Returning the Loan Money with Increased Amount

I want to borrow money from a person working in my office for a period of six months. I will return the money with increased amount. Is it Jayez (permissible)?

It is lawful to pay more than the borrowed money provided there is no condition of extra amount and the creditor does not desire to receive an extra amount, rather it is good and proven by Hadith. However, at the time of paying the debt one should say like this, here is your capital and this extra amount is from my side. This not Riba, there was no precondition of extra payment.
 

Options

Layout type:

Layout color: