Question: how much money do you need to retire in your 30s?
Answer: If you're 30 when you start saving, 10% won't be enough. You'll need to save 15% of your income, or about $7,200 per year, to meet your retirement goals. If you start at age 40, you'll need to save 24% of your income, or $12,000 per year, to reach your goal.