The Real Math on Starting Retirement Savings at 45

Two people put in the same amount of money. One started at 25, one at 45. Here's what 20 fewer years of compounding actually costs — and what catch-up contributions can buy back.
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Personal finance for people starting late — the math, the moves, and the mindset for building real wealth when you didn’t start in your 20s.

Two people put in the same amount of money. One started at 25, one at 45. Here's what 20 fewer years of compounding actually costs — and what catch-up contributions can buy back.

Here’s the interactive breakdown — drag any slider to see compound interest in action. The core formula is simple: A = P(1 + r/n)^(nt), where your interest earns interest on top of itself. That’s the magic. With simple interest, $10,000…

If your 401(k) could talk, it would probably be sending you passive-aggressive texts right now. And honestly, who can blame it? You’ve been ignoring it like that cousin who only calls when they need bail money. Before we fix that,…