Compound interest means you earn interest on your interest — not just your principal. A $10,000 deposit at 5% APY grows to $10,500 after year 1, then earns 5% on $10,500 in year 2, and so on. Over 20 years that $10,000 becomes over $26,500 without adding a dollar. Starting earlier amplifies this dramatically.

Your marginal rate is the rate on your last dollar of income. Your effective rate is total tax divided by total income — usually much lower. Being “in the 22% bracket” does not mean you pay 22% on everything. Only income above each threshold is taxed at that rate.

Start with a 3–6 month emergency fund in a high-yield savings account. After that, direct savings toward specific goals: retirement (15% of income is a common target), a home down payment, or other targets. Use our Savings Goal Calculator to build a concrete plan.

Short-term goals (under 3 years): high-yield savings accounts or CDs — safe, accessible, and earning real interest. Long-term goals (5+ years): consider index fund investing where historical returns average 7–10% annually, though with more volatility. Never invest money you need within 3 years in stocks.