Nominal vs Effective Interest Rate Explained

The interest rate in your contract is NOT what you actually pay. Learn the difference between nominal and effective interest rates, how compounding frequency changes everything, and how to calculate the true cost of a loan. Nominal vs Effective Rate (0:00) Understanding the two types of interest rates. - Nominal (stated/contractual) = simple interest - Effective = compound interest (what you actually pay) - The formula: (1 + r/m)^m - 1 Compounding Frequency (8:00) How often interest is calculated matters. - Monthly, quarterly, weekly, daily - More frequent compounding = higher effective rate - 12% nominal monthly = 12.68% effective Practice Problems (17:00) Step-by-step examples with different periods. - Quarterly loan: 12% nominal = 12.55% effective - 8-month loan with quarterly compounding - Weekly compounding (every 7 days) - Converting between periods Loans with Fees and Upfront Interest (35:00) The real cost of borrowing. - Document fees increase effective rate - Upfront interest makes loans more expensive - Two-step approach: convert rate, then include fees - Stated 14% can actually cost 21.5% per year All About Economics - With Michael #InterestRate #NominalRate #EffectiveRate #CompoundInterest #Finance #Loans #Banking #Economics

Added 19 May 2026