An emergency fund is the buffer that keeps a surprise — a car repair, a medical bill — from becoming high-interest debt. A common target is three to six months of essential expenses, but any cushion beats none.

Keep it somewhere safe and accessible, like a high-yield savings account, separate from your everyday checking so it's not spent by accident. The goal is liquidity, not investment returns.

Start small and automate it. Even a modest, recurring transfer on payday — paying yourself first — adds up faster than waiting for "leftover" money that rarely appears.