Money Mustache - The Shockingly Simple Math Behind Retirement

If you save a percentage of income at a certain rate of growth over time and on, stay out of the weeds with the numbers. You will never get, never be retired at 65. So every financial plan that i run for a 20 something year old, they need to save about 15 % of their income. But it's dramatically differet if they're 34, or if they're forty, four or at 15%.