Payment On 150000 Mortgage Current Interest Rates On Business Loans Average small business loan Interest Rates in 2019: Comparing. – Average Small Business Loan Interest Rates by Lender. The average interest rate on a conventional small business loan is around 4% to 6%. That said, interest rates will vary across lenders, with banks typically offering lower rates than alternative or online lenders.Bank One Loan Calculator Loan Calculator – Mauritius Commercial Bank – MCB – Our loan calculator is an indicative tool and is meant to provide information and estimates based on information provided by you. The bank does not guarantee the accuracy, adequacy and completeness of any information or computation provided.