An emergency fund (also called a rainy day fund) is money set aside specifically to cover unexpected costs or a loss of income — a financial safety net that protects you from needing to borrow at short notice when life throws a curveball.
A common guideline is three to six months' worth of essential living costs (rent/mortgage, bills, food, transport). The right target varies by circumstances — less job security or a single household income might mean aiming higher; very stable dual incomes might be comfortable with less.
Without a buffer, an unexpected bill, job loss, or emergency repair often has to go on a credit card or loan, adding interest costs on top of an already stressful situation. An emergency fund breaks that cycle, and is widely considered one of the foundational building blocks of financial resilience — often recommended as a priority before other savings or investment goals.
Easily accessible savings (not locked away or invested), and ideally kept separate from everyday spending so it's not accidentally dipped into. Our free rainy day fund tracker and annual financial review help you build and track it. This is general information, not financial advice.