An emergency fund is a pool of money kept easily and quickly accessible — typically in a savings account or a liquid fund — specifically set aside to cover unexpected financial shocks, like a sudden job loss, medical emergency, or urgent home or vehicle repair, without having to sell long-term investments or take on high-interest debt.
A commonly recommended size for an emergency fund is enough to cover 3 to 6 months of your essential living expenses, though this can vary depending on your job stability, whether you have dependents, and other personal circumstances — those with less predictable income, like freelancers or business owners, often keep a larger buffer. The key feature of an emergency fund isn't high returns, but easy accessibility, which is why it's usually kept away from volatile, market-linked investments.