Certificate of Deposit

A Certificate of Deposit is one of the most straightforward savings instruments available through U.S. depository institutions. When a depositor opens a CD, they agree to leave a specific principal amount untouched for a set maturity period. In return, the bank or credit union commits to paying a fixed annual percentage yield (APY) for the duration of that term. At maturity, the depositor receives the original principal plus all accumulated interest.

CD terms at U.S. banks typically range from as short as one month to as long as five or even ten years. The general principle is that longer terms attract higher rates because the depositor is committing capital for an extended period, giving the bank greater certainty about its funding costs. In high-rate environments, shorter-term CDs have occasionally offered rates competitive with or exceeding longer-term products, a condition known as an inverted CD rate curve.

Federal Deposit Insurance Corporation (FDIC) insurance covers CD balances up to $250,000 per depositor, per institution, per ownership category at FDIC-member banks. At credit unions, the equivalent protection is provided by the National Credit Union Administration (NCUA) at the same coverage limit. This government-backed insurance makes CDs one of the few financial products that are genuinely risk-free for balances within coverage limits — the principal and promised interest are protected even if the institution fails.

The primary tradeoff with a standard CD is liquidity. Unlike a savings account, a CD balance cannot be withdrawn without penalty during the term. Early withdrawal penalties at U.S. banks typically range from 90 days of interest for short-term CDs to 150 to 365 days of interest for longer-term products. Some banks offer no-penalty or liquid CDs that allow early withdrawal without fees, though these products usually carry lower rates than traditional fixed-term CDs.

Interest on CDs is subject to federal and state income tax in the year it is credited, even if the depositor does not withdraw it. This is a critical distinction from certain other savings products. For tax-advantaged accounts, CDs can be held inside Individual Retirement Accounts (IRAs) at many banks, allowing interest to accumulate tax-deferred or tax-free depending on the account type.

CD rates are influenced heavily by the federal funds rate set by the Federal Reserve. When the Fed raises rates, new CD offerings typically improve quickly. When the Fed cuts rates, existing fixed-rate CDs become particularly valuable, locking in yields that may no longer be available on new products. This dynamic makes timing and term selection important considerations for depositors managing a cash allocation.