What does FDIC insured actually mean?

FDIC insurance is a federal guarantee: if an insured bank fails, depositors are paid back up to $250,000 per depositor, per bank, per ownership category, typically within a business day or two, historically often over a weekend. The agency was born in 1933 after bank runs vaporized savings, and its record since is perfect: not one cent of insured deposits lost in over ninety years. Credit unions carry the identical guarantee under the NCUA.

The fine print that matters is the category math. Individual accounts, joint accounts, and certain retirement accounts are separate categories, so a couple can structure well past $250,000 of coverage at one bank, and balances beyond that simply move to a second bank for a fresh limit. What FDIC does not cover: investments, stocks, bonds, mutual funds, crypto, even when bought through a bank. Those are protected against brokerage failure by SIPC, which is a different promise, not a guarantee against losing value.