A certificate of deposit, or CD, is a savings account that locks your money away for a fixed period in exchange for a guaranteed interest rate. Banks and credit unions offer them, terms run anywhere from about one month to ten years, and the deposit is federally insured up to $250,000 per depositor per institution. In return for leaving the money alone until the end of the term, you get a predictable return that won’t shift with the broader rate environment.
How a CD Works
When you open a CD, you agree to leave your deposit untouched for a set term. Terms typically range from three months to five years, though some banks offer terms as short as one month or as long as ten years. In return, the bank pays you a fixed annual percentage yield (APY) that won’t change for the life of the CD, regardless of what happens to broader interest rates. APY reflects your total return over a year after accounting for how often the bank compounds your interest.
Banks compound interest on CDs daily or monthly, adding earned interest back to your principal so the balance grows faster over time. The APY formula accounts for this compounding, which is why it’s a more accurate measure of your real return than a simple interest rate would be.1Legal Information Institute. 12 CFR Appendix A to Part 1030 – Annual Percentage Yield Calculation The date your term ends is called the maturity date. At that point you get your original deposit back plus all accumulated interest, and you’re free to take the money or reinvest it.
The Tradeoff: Early Withdrawal Penalties
The price of a guaranteed rate is restricted access. Pull money out before the maturity date and the bank charges an early withdrawal penalty. Federal regulations require banks to disclose exactly how this penalty is calculated before you open the account.2eCFR. 12 CFR Part 1030 – Truth in Savings (Regulation DD) – Section: 1030.4 Account Disclosures
Penalties are usually expressed as a number of days’ or months’ worth of interest. A one-year CD might cost you 90 days of interest for breaking it early; a five-year CD might cost 150 or 180 days. On a CD you’ve only held for a few months, the penalty can actually exceed the interest you’ve earned so far, eating into your original deposit. Do the math before committing to a long term.
One consolation: the IRS treats early withdrawal penalties as an above-the-line deduction on your tax return, reported on Schedule 1 of Form 1040.3Internal Revenue Service. Schedule 1 (Form 1040) – Additional Income and Adjustments to Income You can claim it even if you don’t itemize.
Federal Deposit Insurance
CDs at banks are insured by the Federal Deposit Insurance Corporation (FDIC). If the bank fails, the government guarantees your deposits up to $250,000 per depositor, per insured bank, for each ownership category.4Office of the Law Revision Counsel. 12 USC Chapter 16 – Federal Deposit Insurance Corporation – Section: 1821 Insurance Funds A joint account counts as a separate ownership category, so a married couple sharing a joint CD account at one bank has up to $500,000 in coverage between them.5FDIC. Understanding Deposit Insurance
Credit unions offer equivalent protection through the National Credit Union Share Insurance Fund, administered by the National Credit Union Administration (NCUA). The coverage limit matches: $250,000 per member, per insured credit union, per ownership category.6Office of the Law Revision Counsel. 12 USC 1787 – Payment of Insurance Any amount above these limits is uninsured and at risk if the institution becomes insolvent, so depositors with large balances sometimes spread funds across multiple institutions.
Common Types of CDs
Not every CD works the same way. The variations below address different needs around flexibility, deposit size, and where you buy.
No-Penalty (Liquid) CDs
A no-penalty CD lets you withdraw your full balance before maturity without paying a fee. The catch is a lower APY compared to a standard CD of the same length. These work well for money you’re fairly sure you won’t need but want the option to access just in case.
Bump-Up and Step-Up CDs
Bump-up CDs give you the right to request a rate increase if the bank raises its published CD rates during your term. You typically get one bump-up opportunity per term. Step-up CDs work differently: the rate increases automatically at scheduled intervals throughout the term, regardless of market conditions. Both types start with a lower initial rate than a comparable fixed-rate CD, so they only pay off if rates actually climb during your holding period.
Add-On CDs
Most CDs only let you deposit money once, at opening. An add-on CD lets you make additional contributions during the term, and those extra deposits earn the same APY as your original balance. Banks set their own rules on how much and how often you can add.
Jumbo CDs
Jumbo CDs require a large minimum deposit, typically $100,000 or more, though some banks set the threshold at $25,000 or $75,000. They sometimes offer a slightly higher rate than standard CDs, but the gap has shrunk in recent years. If you’re parking six figures, compare jumbo rates against regular CDs at online banks before assuming the jumbo label means a better deal.
Brokered CDs
Brokered CDs are purchased through a brokerage account rather than directly from a bank. They’re still issued by FDIC-insured banks, so your deposit is protected up to $250,000 per issuing bank. The key difference is liquidity: instead of paying an early withdrawal penalty, you can sell a brokered CD on the secondary market before maturity. That flexibility comes with interest rate risk. If rates have risen since you bought the CD, newer CDs pay more, making yours less attractive to buyers, and you could sell at a loss. If rates have fallen, your CD becomes more valuable and could sell at a premium.
IRA CDs
An IRA CD is a certificate of deposit held inside an Individual Retirement Account. The CD itself works the same way, but the IRA wrapper changes how interest is taxed. In a traditional IRA, contributions may be tax-deductible and interest grows tax-deferred, but withdrawals in retirement are taxed as ordinary income. Taking money out before age 59½ generally triggers a 10% additional tax on top of regular income tax.7Internal Revenue Service. Retirement Plans FAQs Regarding IRAs – Distributions (Withdrawals) In a Roth IRA, you contribute after-tax dollars, but qualified withdrawals in retirement are tax-free.8Internal Revenue Service. Traditional and Roth IRAs
How CD Interest Is Taxed
Interest earned on a CD held outside a tax-advantaged account is taxable as ordinary income at the federal level. You owe tax on that interest in the year it’s credited to your account, even if you don’t withdraw it.9Internal Revenue Service. Topic No. 403, Interest Received This is the IRS’s constructive receipt rule: once the bank credits interest to your balance, the agency considers it available to you, and it’s taxable.10eCFR. 26 CFR 1.451-2 – Constructive Receipt of Income
For a multi-year CD, this means you’ll owe taxes on interest each year as it accrues, not just when the CD matures and you collect the money. If your CD earns $10 or more in interest during the year, the bank sends you Form 1099-INT reporting the amount.11Internal Revenue Service. About Form 1099-INT, Interest Income You’re required to report all taxable interest on your return regardless of whether you receive this form.
What Happens When a CD Matures
When your CD reaches its maturity date, the bank gives you a short window to decide what to do with the money. This is called a grace period, and it typically lasts 7 to 10 calendar days. During the grace period, you can withdraw the funds penalty-free, add money and renew, or move the balance elsewhere.
For CDs that auto-renew, federal rules require the bank to notify you at least 30 calendar days before maturity, or at least 20 days before the end of the grace period if the bank provides a grace period of at least five days.12eCFR. 12 CFR 1030.5 – Subsequent Disclosures If you ignore the notice and miss the grace period, the bank automatically rolls your balance into a new CD at whatever rate it’s currently offering. That rate could be significantly lower than what you were earning, and you’ll be locked in for another full term. This is where people lose money without realizing it.
If you leave a matured CD completely untouched for years without responding to the bank’s attempts to contact you, the funds eventually become unclaimed property. Most states require banks to turn over dormant accounts after three to five years of inactivity, with the clock typically starting at the maturity date. Any customer-initiated contact with the bank usually resets the dormancy timer. You can reclaim funds from your state’s unclaimed property program, but the process takes time and the money stops earning interest once the state takes custody.
How to Open a CD
Banks are required to verify your identity under the Customer Identification Program before opening any deposit account. At minimum, you’ll need to provide your full legal name, date of birth, a residential street address, and a taxpayer identification number such as a Social Security Number or Individual Taxpayer Identification Number.13eCFR. 31 CFR 1020.220 – Customer Identification Program Requirements for Banks Most banks also ask for a government-issued photo ID and let you name a beneficiary who would inherit the CD if you die.
You can open a CD online, over the phone, or at a branch. Funding options include an electronic transfer from a linked bank account through the ACH network, a wire transfer, or a mobile check deposit. Wire transfers move money faster but carry a fee, often in the $25 to $35 range at major banks. Before the account is finalized, the bank provides a Truth in Savings disclosure that spells out the exact APY, term, maturity date, and early withdrawal penalty.2eCFR. 12 CFR Part 1030 – Truth in Savings (Regulation DD) – Section: 1030.4 Account Disclosures Read the penalty section carefully. That one line of fine print determines what it costs you if plans change.