The time value of money is the most fundamental concept in all of finance. A dollar today is worth more than a dollar tomorrow — because today's dollar can be invested and earn interest. This simple idea underpins every financial calculation: bond pricing, loan payments, retirement planning, and company valuation.
Two key formulas: Future Value = PV × (1 + r)^n (how much today's money grows); Present Value = FV / (1 + r)^n (what future money is worth today). At 8% interest, $10,000 today becomes $21,589 in 10 years. Flip it: $21,589 promised 10 years from now is only worth $10,000 today.
TVM explains why winning a $1 million lottery paid over 20 years is worth far less than $1 million today. At a 5% discount rate, $50,000 per year for 20 years is worth only about $623,000 in present value. Understanding TVM is essential for making any financial decision — from choosing a mortgage to evaluating a business investment.