Since the FDIC opened its doors in 1934, no depositor has lost a penny of insured deposits in a bank failure. That is the agency's own record, and it held through the Depression's aftermath, the savings-and-loan crisis, 2008, and the bank runs of 2023. The catch sits in one word: insured. The guarantee is real, but it has precise boundaries, and the people who get burned in bank failures are almost always the ones who assumed the boundaries were somewhere other than where they are.

The basic formula

The FDIC insures deposits up to $250,000 per depositor, per insured bank, per ownership category. Credit unions have an exact mirror: the National Credit Union Share Insurance Fund, run by the NCUA, with the same $250,000 formula and the same federal backing. Neither costs the depositor anything, requires enrollment, or involves a claims form for insured amounts. If your institution is federally insured, coverage is automatic.

Each of the three dimensions matters:

  • Per depositor: the limit applies to each person, not each account. Ten accounts at one bank titled to one person in the same category share a single $250,000 ceiling.
  • Per insured bank: spread money across two unrelated banks and you have two ceilings. Two branches of the same bank, or two brands owned by the same chartered bank, count once, a detail that catches people using multiple online brands of a single institution.
  • Per ownership category: the same person at the same bank can hold separately insured buckets when the money is titled differently.

Note what the ceiling is not: it is not per account, not per branch, and not increased by opening more accounts of the same type. It does not depend on the bank's size or age, and coverage does not require citizenship or residency; any depositor at an insured institution is covered on identical terms. The insurance funds are financed by premiums the industry itself pays, with the full faith and credit of the United States standing behind them.

Ownership categories: how coverage stacks

The categories are where the arithmetic gets interesting. The main ones for households:

  • Single accounts, owned by one person: $250,000 per owner per bank.
  • Joint accounts, owned by two or more people: $250,000 per co-owner, so a two-person joint account is insured to $500,000, on top of what each person holds individually. The titling rules that make this work are covered in our joint accounts guide.
  • Certain retirement accounts, including IRAs holding bank deposits: a separate $250,000 per owner per bank.
  • Trust accounts, including informal payable-on-death designations: since April 2024, insured at $250,000 per beneficiary, up to five beneficiaries, for a maximum of $1,250,000 per owner per bank in this category.

Worked example: a married couple at one bank with $250,000 in each spouse's single account, $500,000 in a joint account, and $250,000 in each spouse's IRA share certificates is fully insured for $1.5 million at that single institution. Nothing exotic was required, only titling. The reverse example is the painful one: an individual with $600,000 in one single-ownership savings account is uninsured for $350,000 of it, no matter how many separate accounts the sum is split across at that bank.

What deposit insurance never covers

Both funds insure deposits: checking, savings, money market deposit accounts, and certificates. They do not cover investment products, even ones bought through a bank lobby: stocks, bonds, mutual funds, ETFs, annuities, life insurance, and crypto assets are all outside the perimeter, along with the contents of a safe deposit box. A brokerage's cash and securities protections come from an entirely different regime with different rules. Treasury securities held directly are not FDIC-insured either, but as our piece on CDs and Treasury bills explains, they carry the government's direct backing instead, which makes the insurance question moot.

Losing money to a market decline is never an insured event. Deposit insurance answers exactly one question: what happens to your deposits if the institution itself fails.

The fintech gap

Here is the modern trap. Many popular money apps are not banks. They are technology companies that hold your balance and, somewhere behind the scenes, park customer funds at one or more partner banks. The marketing usually says "FDIC insured," and the phrase is doing subtle work: the insurance applies if the partner bank fails, and only if the records establishing your individual ownership are clean. If the middleman fails, the FDIC does not step in at all, because no bank failed. Recent fintech collapses left customers locked out of their money for months while courts untangled whose dollars were whose, even though the funds sat at healthy insured banks the entire time.

The Consumer Financial Protection Bureau has warned specifically about balances stored in payment apps, which may not be swept to an insured bank at all while they sit in the app. The clean rule: money you cannot afford to have frozen belongs in an account you hold directly at a chartered, federally insured institution, in your own name.

What a failure actually looks like

Bank failures are anticlimactic by design. The regulator typically takes over on a Friday, and the standard playbook either transfers accounts to an acquiring bank over the weekend or pays insured depositors directly, historically within a few business days. Direct deposits reroute, debit cards generally keep working or are quickly reissued, and insured customers experience an ownership change more than a loss event. Insured CDs are typically either honored by the acquiring bank or paid out without early-withdrawal penalty. Uninsured balances above the limits become claims against the failed institution's assets, which can take years and may not pay in full. The difference between those two experiences is the entire reason the limits are worth ten minutes of your attention.

How to check yourself in ten minutes

Both agencies publish calculators that apply the category rules to your actual accounts: the FDIC's EDIE tool for banks and the NCUA's share insurance estimator for credit unions. Verify the institution itself while you are at it, since the FDIC's BankFind and the NCUA's directory confirm federal coverage, and a handful of state-chartered credit unions carry private insurance instead, a distinction flagged in our comparison of banks and credit unions. If any single-institution balance is drifting toward the ceiling, the fixes are unglamorous: retitle across ownership categories where that genuinely fits your situation, or open an account at a second institution, ideally one paying a competitive rate in the first place, as covered in our high-yield savings explainer.

Next step: total what you hold at each institution, by ownership category, and run the numbers through EDIE or the NCUA estimator. For most households the answer will be "fully covered, carry on." If it is not, you will have found out from a calculator instead of a receivership notice, which is the only good way to find out.