Effective interest Rate: Effective interest is simply called actual interest. Most often its varying from the normal interest rate. Effective interest depends on the loan duration and the mode of payment.
Calculating Effective interest of MFIs:
In Bangladesh and some other countries, Micro finance are spreading each corner of the country, so its become significant to control on this. Calculating Effective interest will show the real interest rate for the benefits of loan amount. As it is important to calculate the cost to find out the profit.
It is very difficult to calculate the Effective interest of Micro-finance as there is a huge no of installment on borrowed amount. But it will be easier by using the following formula.
Formula:
EIR = (Total Interest + service charges) / Average loan outstanding
Average loan outstanding is different for flat interest rate method and declining interest rate method
Average loan outstanding for Flat rate method:
= (Principle amount + Principle payment in each installment) / 2
Average Loan outstanding for Declining method:
= (Initial balance + all monthly or weekly balances) / No of payments
Example:
Flat rate method:
Borrowed amount (P) = 1000 (TK)
Interest rate (I) =15%
No of payments (n) = 12 (Monthly)
service charges =20 (TK)
Payments (P) = (1000+150)/12 + (20/12)
Average loan outstanding = Principle amount (1000) + Principal payments (83.33) / 2
= 541.66
Effective interest rate (Flat method)
= Total Interest (150) + service charges (20) / Average loan outstanding(541.66)
= 0.31 or 31% Effective interest.
As the result is for the 12 month so we don't have to convert it yearly. if it doesn't, have to covert yearly to find out the yearly interest rate.