What is the FDIC and how does deposit insurance work?

The FDIC (Federal Deposit Insurance Corporation) is a federal agency that insures bank deposits up to $250,000 per depositor, per insured bank, per ownership category. The insurance fund comes from premiums that banks pay, not from taxpayer money. If an insured bank fails, the FDIC pays depositors back up to the coverage limit.

The Federal Deposit Insurance Corporation (FDIC) was created by Congress in 1933 after thousands of banks collapsed during the Great Depression, wiping out the savings of millions of Americans. Before deposit insurance existed, a bank failure meant depositors could lose everything. The FDIC restored public trust in the banking system by guaranteeing that deposits would be safe even if a bank went under.

Beyond insuring deposits, the FDIC serves as the primary federal regulator for state-chartered banks that are not members of the Federal Reserve System. It also steps in as receiver when any FDIC-insured bank fails, managing the process of closing the bank and paying out depositors or transferring their accounts to a healthy institution.

How Coverage Limits Work

Deposit insurance covers up to $250,000 per depositor, per insured bank, for each account ownership category. The ownership categories include:

Single accounts owned by one person

Joint accounts owned by two or more people

Certain retirement accounts such as IRAs

Revocable trust accounts

Irrevocable trust accounts

Employee benefit plan accounts

Corporation, partnership, and unincorporated association accounts

Government accounts

Because each ownership category is insured separately, one person can have well over $250,000 in insured deposits at a single bank. Someone with $250,000 in an individual savings account and $250,000 in a joint checking account with their spouse has $500,000 of coverage at that same bank. Add $250,000 in an IRA at the same institution and the total insured amount reaches $750,000.

Deposits held at different FDIC-insured banks are insured separately as well. The same person could have $250,000 in a single account at Bank A and another $250,000 in a single account at Bank B, with both fully covered.

The Deposit Insurance Fund

The Deposit Insurance Fund (DIF) is the reserve pool the FDIC draws from to pay depositors of failed banks. Banks fund the DIF through quarterly insurance premiums called assessments. No taxpayer money goes into the fund.

Assessment rates vary based on a bank's size, risk profile, and supervisory ratings. Well-capitalized banks with clean examination records pay lower rates, while riskier institutions pay more. Rates have historically ranged from roughly 1.5 to 40 basis points of assessable deposits. For a bank with $5 billion in deposits, a difference of just 5 basis points translates to $2.5 million in annual expense.

These assessments show up as part of non-interest expense on a bank's income statement. The FDIC targets a DIF reserve ratio of at least 1.35% of estimated insured deposits. When the fund dips below that level after periods of elevated bank failures, the FDIC raises assessment rates across the industry to rebuild the reserve. A wave of bank failures at other institutions can increase expenses for healthy banks too.

Why Deposit Insurance Matters for Bank Investors

Deposit insurance is the foundation of the modern banking business model. Because the government guarantees their deposits, people willingly park money in bank accounts at interest rates well below what they could earn elsewhere. A bank might pay 0.5% on a savings account while lending that money out at 6% on a mortgage. That spread between what banks pay depositors and earn on loans is the net interest margin (NIM), and deposit insurance is what makes it possible at scale.

This dynamic gives insured deposits special value in bank analysis. Insured deposits are considered "sticky" funding because depositors have no reason to flee when they know their money is guaranteed. A bank funded primarily by insured deposits has a more stable, lower-cost funding base than one relying heavily on wholesale funding or large uninsured balances.

FDIC assessment expense also affects profitability directly. Assessment rates have varied considerably over time, and banks with higher risk profiles pay meaningfully more. When comparing banks, differences in assessment rates can show up in the efficiency ratio and overall non-interest expense levels.

Uninsured Deposits as a Risk Factor

Deposits above the $250,000 per-ownership-category limit are uninsured. These depositors have real credit exposure to the bank and a strong incentive to pull their funds at the first sign of trouble. The ratio of uninsured deposits to total deposits is a widely tracked measure of this vulnerability.

Banks with high concentrations of uninsured deposits face greater liquidity risk during periods of stress. When confidence erodes, uninsured depositors can withdraw funds quickly, forcing the bank to sell assets (potentially at a loss) or seek expensive emergency funding. Several high-profile bank failures have followed exactly this pattern, where a rapid outflow of uninsured deposits overwhelmed the institution's ability to meet withdrawals.

For investors evaluating a bank's stability, the uninsured deposit ratio is worth monitoring alongside the bank's liquidity position and available borrowing capacity from sources like Federal Home Loan Bank advances and the Federal Reserve's discount window. A bank with 60% uninsured deposits carries different funding risk than one with 20%.

Verifying FDIC Coverage

All FDIC-insured banks display the FDIC membership sign at their branches and on their websites. Depositors can confirm a bank's insurance status through the FDIC's BankFind tool at fdic.gov, which also provides financial data, examination history, and other details about individual institutions. The FDIC's Electronic Deposit Insurance Estimator (EDIE) is another useful resource that helps depositors calculate whether their specific account arrangements are fully covered.