What Is the Time Value of Money?
In plain English
The time value of money is the principle that a sum of money is worth more now than the same sum in the future due to its earning potential. Money available today can be invested to generate returns, making present dollars inherently more valuable than future dollars of the same amount.
Why Does Money Lose Value Over Time?
Money loses purchasing power over time primarily because of inflation, which erodes what a dollar can buy. Even without inflation, a dollar held idle today foregoes the interest or investment returns it could have earned. This opportunity cost means waiting to receive money always carries a hidden price.
How Is Time Value of Money Used in Financial Planning?
Financial planners use time value of money to calculate present value, future value, and loan amortization. It drives decisions like whether to take a lump-sum pension payout now or monthly payments for life, how much to save today to reach a retirement goal, and whether an investment's future cash flows justify its current price.
What Are Present Value and Future Value?
Present value is what a future sum is worth in today's dollars after discounting for time and interest. Future value is what a current sum grows to after earning returns over a period. Both calculations use an interest or discount rate to convert between the two, making them essential tools for comparing financial options across time.
Frequently asked questions
How does inflation relate to the time value of money?
Inflation is one of the main reasons money loses value over time. As prices rise, each dollar buys fewer goods. The time value of money accounts for this by discounting future sums back to their equivalent worth in today's purchasing power.
Is the time value of money relevant for everyday decisions?
Yes. Whether you're deciding to pay off debt early, lease versus buy a car, or invest a bonus, the time value of money helps you compare options involving different amounts at different points in time so you can make the financially optimal choice.
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Related terms
Inflation
Inflation is the rate at which the general price level of goods and services rises over time, reducing the purchasing power of money. It affects everything from grocery bills to retirement savings.
Opportunity Cost
Opportunity cost is the value of the next-best alternative you give up when making a financial decision. Every financial choice has an opportunity cost, even when no money changes hands.
Compound Annual Growth Rate (CAGR)
CAGR is the rate at which an investment would have grown if it grew at a steady rate each year over a specific period. It is the most reliable way to compare the performance of different investments over different time frames.
Purchasing Power
Purchasing power is the quantity of goods and services that a unit of currency can buy. Inflation erodes purchasing power over time, making it essential to invest in assets that grow faster than prices.