Calculating the true cost of a business loan means looking beyond the amount you borrowed and understanding every extra fee attached to it. Start with the principal (the amount you collect) and the interest rate, then calculate how much interest you will pay over the full loan period. Add all additional costs such as processing fees, insurance charges, late penalties, monthly account charges, early repayment fees, and tax-related deductions. You should also check whether the loan uses simple interest or compound interest, because compound interest increases the total cost. Finally, compare the total amount you will repay with the amount you borrowed—this difference shows the real cost. Understanding these details helps you avoid surprises and choose the most affordable loan for your business.