Key Takeaways
Direct answer: A certificate of deposit is a fixed-term, fixed-rate deposit account at a bank or credit union. In exchange for agreeing not to withdraw the funds until the term ends, the depositor generally earns a higher rate than a savings account. Withdrawing early usually costs a penalty, most often a set number of months of interest, and CDs issued by FDIC-member banks are insured up to the standard $250,000 per depositor, per bank, per ownership category.
- Rate and term are fixed at opening; the rate does not move with market rates during the term the way a high-yield savings account's rate can.
- Early access almost always costs a penalty, disclosed at account opening, typically scaled to the CD's term length.
- FDIC insurance (or NCUA for credit unions) covers principal and credited interest up to the standard $250,000 limit, the same protection that applies to a savings account.
- A callable CD lets the bank end the term early if rates fall, shifting reinvestment risk to the depositor in exchange for a higher stated rate.
How CDs Work
Opening a CD means depositing a set amount for a set term, commonly ranging from a few months to five years or longer, at a rate fixed for the life of the term. The bank uses that committed funding to make loans or investments of its own, and passes part of the resulting yield back to the depositor as the CD rate. Because the bank knows the money will not be withdrawn early under normal circumstances, it can typically offer a higher rate than on an account where funds can leave at any time.
Interest can be paid out on a schedule, monthly, quarterly, or at maturity, or it can compound and add to the balance, depending on the specific CD's terms. At maturity, most banks give a short grace period, often seven to ten days, during which the depositor can withdraw the funds, roll them into a new CD, or let the bank automatically renew into a similar term at the prevailing rate. Missing that window usually means the funds renew automatically, which is worth checking before the maturity date arrives.
Early Withdrawal Penalties
The defining tradeoff of a CD is the early withdrawal penalty. Banks disclose the penalty schedule when the account is opened, and it is typically expressed as a number of months or days of interest, for example three months of interest on a one-year CD or six months on a five-year CD. The penalty is deducted from the amount returned and can, in some cases, reduce the payout below the original principal if the CD is closed very soon after opening, before much interest has accrued.
Some banks offer a no-penalty CD as a distinct product, trading a lower rate for the ability to withdraw the full balance early without a fee. That structure sits between a standard CD and a high-yield savings account on the liquidity spectrum, and it is worth comparing against Swoopr's High-Yield Savings Accounts guide before assuming a locked-term CD is the right fit for funds that might be needed sooner than planned.
FDIC and NCUA Insurance
A CD held at an FDIC-member bank is insured up to the standard $250,000 per depositor, per insured bank, per ownership category, the same limit that covers checking and savings balances at the same institution. Principal and any interest already credited both count toward that limit. A CD at a federally insured credit union carries the equivalent NCUA share insurance instead, at the same standard limit. Full details on how the ownership-category rules work are covered in Swoopr's FDIC Deposit Insurance guide.
The FDIC's own guidance on shopping for a CD warns that CDs purchased through a third-party broker carry an extra step of risk: the FDIC does not license or register deposit brokers, and if a broker fails to actually place the funds at an FDIC-insured bank, the deposit is not covered. This is a separate concern from the mechanics of a brokered CD itself, covered next in Swoopr's Brokered CDs guide.
Callable CDs
A callable CD gives the bank, not the depositor, the option to end the term early, usually after an initial non-callable period stated up front. Banks exercise that option when market rates have fallen enough that continuing to pay the CD's fixed rate costs more than issuing new deposits at the lower prevailing rate. When a CD is called, the depositor receives principal and accrued interest back and has to reinvest at whatever rate is available at that time, a risk known as reinvestment risk. Because the depositor bears that risk, callable CDs typically pay a higher stated rate than a comparable non-callable CD of the same term, compensation for the possibility of being called away early.
Tax Treatment
CD interest is taxable as ordinary income at the federal level in the year it becomes available, which matters for multi-year CDs where interest accrues before the maturity date: the IRS treats interest credited to the account as taxable in that tax year even if it has not yet been withdrawn. The bank reports interest of $10 or more on Form 1099-INT, but all taxable interest must be reported on the federal return regardless of whether a 1099 was issued. CD interest does not carry the state and local tax exemption that applies to interest from Treasury securities, so it is generally taxed at the state level as well, unlike the Treasury-based instruments covered later in this cluster.
CDs vs. Other Cash Equivalents
| Feature | CD | High-yield savings | Money market fund |
|---|---|---|---|
| Rate | Fixed for the term | Variable, can change anytime | Variable, tracks short-term market rates |
| Access to funds | Locked; penalty for early withdrawal | On demand | Generally next business day |
| FDIC/NCUA insured | Yes, standard limit | Yes, standard limit | No, it is a security |
A CD's advantage is a locked-in rate: if rates fall after opening, the CD keeps paying the original rate for its full term, something a variable-rate savings account cannot promise. The tradeoff is the reverse case, if rates rise after opening, the CD is stuck at the lower original rate until maturity or an early-withdrawal penalty is paid. CD laddering, covered next in this cluster, is the standard way investors manage that rate-direction uncertainty without giving up all of a CD's rate advantage.
Evaluation Checklist
- Confirm the bank or credit union is FDIC or NCUA insured before opening the CD.
- Read the early withdrawal penalty schedule before funding the account, not after.
- Check whether the CD is callable, and if so, what the non-callable period is.
- Compare the CD's rate against current Treasury bill and money market fund yields for a similar horizon, not just against other banks' CD rates.
- Note the maturity date and the grace-period window for renewal decisions.
- Confirm total balances at one institution stay within the $250,000 per-ownership-category insurance limit.
Frequently Asked Questions
What happens if I withdraw from a CD before it matures?
Most bank-direct CDs charge an early withdrawal penalty, commonly a set number of months of interest, deducted from the amount returned. The exact penalty schedule is disclosed when the CD is opened and varies by bank and term length; a longer-term CD generally carries a steeper penalty than a short one. This is different from a brokered CD, which is typically sold on the secondary market instead of being redeemed early, so its price can rise or fall rather than incurring a flat penalty.
Are CDs FDIC insured?
A CD issued by an FDIC-member bank is insured up to the standard $250,000 per depositor, per insured bank, per ownership category, the same limit that covers a savings account. Interest already credited to the CD counts toward that limit along with principal. A CD issued by a federally insured credit union carries the equivalent NCUA share insurance instead, at the same standard limit.
What is a callable CD?
A callable CD gives the issuing bank the right to redeem it before the stated maturity date, usually after an initial non-callable period, by returning principal and accrued interest. Banks tend to call a CD when interest rates have fallen, which lets the bank stop paying an above-market rate and leaves the depositor to reinvest the returned funds at lower prevailing rates. Because that reinvestment risk falls on the depositor, callable CDs generally pay a higher stated rate than a comparable non-callable CD.
How is CD interest taxed?
CD interest is taxable as ordinary income at the federal level in the year it becomes available to you, even if you leave it in the account rather than withdrawing it, and even on a multi-year CD where interest accrues before maturity. The bank reports interest of $10 or more on Form 1099-INT, but all taxable interest must be reported regardless of whether a form was issued. CD interest does not receive the state-tax treatment that Treasury-based income does.
Can an early withdrawal penalty be larger than the interest the CD has earned?
Yes. The penalty is defined as a number of months or days of interest, not as a share of interest actually earned, so a CD closed early in its term can owe more interest than it has accrued. When that happens the shortfall comes out of principal, and the depositor gets back less than was deposited. This is the one situation where an insured deposit returns less than the amount put in, and it is a contractual term rather than a market outcome.
What is a no-penalty CD?
A no-penalty CD, sometimes called a liquid CD, lets the depositor withdraw the full balance after a short initial waiting period without the usual interest forfeiture. The tradeoff is normally a lower rate than a standard CD of the same term, and terms often require withdrawing the entire balance rather than part of it. It sits between a CD and a savings account: a rate fixed for the term, without the lock that gives a standard CD its rate advantage.
What happens to a CD at maturity if the depositor does nothing?
Most CDs carry a grace period after maturity, commonly a short window of days stated in the account agreement, during which the balance can be withdrawn or moved without penalty. If nothing is done, the CD typically renews automatically into a new term at the institution's current rate for that term, which may be well below the maturing rate. The renewed CD is then subject to a fresh early withdrawal penalty, so an unattended maturity can quietly relock the money.
What are bump-up and step-up CDs?
A bump-up CD lets the depositor request a rate increase, usually once during the term, if the institution raises its rate on that product. A step-up CD raises the rate automatically on a schedule set at issuance. Both address the same discomfort, holding a fixed rate while rates rise, and both usually start at a lower rate than a plain CD of the same term. The value of either depends on how the actual rate path compares with that starting concession.
How does a CD compare with a Treasury bill of similar maturity for someone in a high-tax state?
The comparison is not rate against rate. CD interest is taxable at federal, state and local levels, while interest on a Treasury bill is generally exempt from state and local income tax. For a resident of a state with meaningful income tax, an after-tax comparison can favor the bill even when the CD shows a higher headline rate. The offsetting considerations are deposit insurance on the CD and market pricing if the bill is sold before maturity.