Which factor most increases the growth of your savings through interest?

Which factor most increases the growth of your savings through interest?

• A. A lower interest rate
• B. A longer lock-in period with no withdrawals
• C. A smaller balance
• D. A higher interest rate

Answer: (D)

Think about how savings grow: interest is money paid to you for keeping money in the account, and you earn a percentage of whatever is in the account. The bigger that percentage, the more money is added each period. When the interest is reinvested (compounded), the new money also earns interest, so the balance grows even faster over time. That means the factor that makes your savings grow the quickest is the interest rate—the higher the rate, the more your balance increases, especially as time goes on. For example, with the same starting amount, earning 3% each year grows your money more slowly than earning 5% each year, and the gap grows with each passing year because the larger balance from compounding earns even more interest. A longer lock-in period can help by keeping money invested, but it doesn’t raise the annual growth rate the way a higher rate does. A smaller starting balance starts lower, so absolute growth is smaller, even though the rate is the same.

Think about how savings grow: interest is money paid to you for keeping money in the account, and you earn a percentage of whatever is in the account. The bigger that percentage, the more money is added each period. When the interest is reinvested (compounded), the new money also earns interest, so the balance grows even faster over time. That means the factor that makes your savings grow the quickest is the interest rate—the higher the rate, the more your balance increases, especially as time goes on.

For example, with the same starting amount, earning 3% each year grows your money more slowly than earning 5% each year, and the gap grows with each passing year because the larger balance from compounding earns even more interest. A longer lock-in period can help by keeping money invested, but it doesn’t raise the annual growth rate the way a higher rate does. A smaller starting balance starts lower, so absolute growth is smaller, even though the rate is the same.