Deposit insurance is a guarantee, usually run or backed by the state, that repays bank depositors up to a fixed amount if their bank fails. It protects ordinary savers from losing money they keep in demand deposit accounts, savings accounts and certificates of deposit, and it removes their main reason to rush to withdraw cash at the first sign of trouble. Schemes are typically funded by premiums charged to the banks they cover.
Deposit insurance is one of the two classic defences against a bank run, alongside the central bank acting as lender of last resort. It covers deposits only, not investments such as shares, bonds or money market funds, and it is distinct from the segregation of funds rules that protect customer money at payment and e-money firms. The gap between insured banks and uninsured cash-like products is a large part of what makes shadow banking vulnerable to runs.
Deposit insurance in plain terms
A bank practises maturity transformation: it lends out most of the money its customers leave with it, so it never has enough cash on hand to repay everyone at once. If people fear the bank is in trouble, the safest move for each of them is to get their money out first, and that rush can sink even a healthy bank.
Deposit insurance changes the calculation. It works like a promise from a trusted third party: if the bank goes under, your money up to a stated amount will be paid back, usually within days. Because savers know they will not lose out, they have little reason to queue at the door. The promise rarely has to be paid in full, because its existence keeps the panic from starting. Banks pay into the scheme in advance, much as homeowners pay insurance premiums before any fire.
History
Several US states ran deposit guarantee funds in the early twentieth century, but most failed when agricultural banks collapsed in the 1920s. After thousands of bank failures in the early 1930s, the Banking Act of 1933 created the Federal Deposit Insurance Corporation (FDIC), and federal insurance began on 1 January 1934 with a limit of 2,500 dollars per depositor. The limit has risen many times since. In October 2008, during the 2008 financial crisis, it was raised temporarily from 100,000 to 250,000 dollars, and the Dodd-Frank Act made the 250,000-dollar figure permanent in 2010.
Most countries adopted schemes in the following decades. The International Association of Deposit Insurers, founded in 2002, sets core principles that many national schemes follow.
How deposit insurance works
Each scheme defines who and what is covered, the limit, and how quickly it pays. In the United States, the FDIC insures deposits at member banks up to 250,000 dollars per depositor, per insured bank, for each ownership category, such as individual, joint and certain retirement accounts. Credit unions have a parallel scheme run by the National Credit Union Administration. Key features of most systems include:
- A coverage limit. Balances above the limit are uninsured and become claims in the failed bank's liquidation.
- Pre-funding. Banks pay regular premiums into a fund, and in the US those premiums have been risk-based since the 1990s, so riskier banks pay more.
- Fast payout. Depositors are either paid directly or moved to a healthy bank that takes over the accounts, often over a weekend.
- A government backstop. The US fund is backed by the full faith and credit of the United States, so payment does not depend on the fund's balance alone.
Deposit insurance in other jurisdictions
Limits and rules differ widely. In the European Union, the Deposit Guarantee Schemes Directive (2014/49/EU) harmonises protection at 100,000 euros per depositor per bank and requires repayment within seven working days. The United Kingdom's Financial Services Compensation Scheme raised its limit from 85,000 to 120,000 pounds on 1 December 2025. Canada's scheme covers up to 100,000 Canadian dollars per category, and India's covers up to 5 lakh rupees per depositor per bank. Some countries also give temporary higher cover to large one-off balances, such as house sale proceeds.
Moral hazard and the 2023 bank failures
The main criticism of deposit insurance is moral hazard. Insured depositors have no reason to check how safely their bank is run, which can let weak banks attract funding and take larger risks. Coverage limits, risk-based premiums, capital rules, caps on leverage and close supervision are meant to offset this, and depositors above the limit are expected to provide market discipline.
The failures of Silicon Valley Bank and Signature Bank in March 2023 tested that design. Both banks relied heavily on large business deposits above the insured limit, and on 9 March 2023 depositors tried to withdraw about 42 billion dollars from Silicon Valley Bank in a single day. On 12 March the FDIC, the Federal Reserve and the Treasury invoked the systemic risk exception, protecting all deposits at both banks, insured and uninsured. The cost to the Deposit Insurance Fund is being recovered through a special assessment on larger banks. The episode revived debate on whether limits should be higher for business payment accounts and how far guarantees really extend in a crisis. The large unrealized losses on securities portfolios at Silicon Valley Bank also showed that insurance stops runs but does not fix the weakness that starts them.