We always encourage borrowers to repay early if they can so as to reduce default risk for our investors. We do charge a modest early repayment fee of 1% of the remaining principal for investors to compensate the loss of the remainder interest on the loan.
E.g. You invest $1,000 at 12% p.a. into a 4 month loan. You receive $250 x 2 in principal and $10 x 2 in interest for the first and second installments, but then the borrower decides to pay off the remainder of the loan. You will then receive your outstanding principal of $500 and $5 in early repayment interests.