Starting retirement investments at age 20 with $100/month at 8% return yields $504,000 by age 65. Waiting until age 25 results in $337,000, a difference of $167,000 due to the impact of compounding over five extra years.
"if you invest a hundred dollars a month beginning at the age of 20 at an eight percent return by the time you're 65 you'll have five hundred and four thousand dollars invested but instead if you figured oh no I'm young I want to go to Coachella I'll start doing this at the age of 25 instead well by the same time you're 65 you'll only have 337,000 invested that's a 167 thousand dollar difference just by waiting five years to invest"