A certificate of deposit is a savings account where you agree to leave money untouched for a set period in exchange for a higher interest rate

When you open a CD, you deposit a lump sum — say $5,000 or $10,000 — and the bank or credit union locks that money away for a fixed term. That term might be three months, one year, five years, or longer, depending on the CD you choose. In return for agreeing not to touch the money until the term ends, the institution pays you interest at a rate higher than you would get from a regular savings account.

The tradeoff is straightforward: more interest in exchange for less access. If you withdraw the money before the term is up, you pay a penalty — usually a few months' worth of interest. That penalty exists to compensate the bank for the rate they locked in for you. Once the term ends, you get your original deposit back plus all the interest earned, and you can either withdraw it or roll it into a new CD.

Key Takeaways

  • A CD pays a fixed interest rate for a set period, ranging from a few months to several years, and you cannot withdraw the money without paying a penalty.
  • Interest rates on CDs are higher than regular savings accounts because the bank knows exactly how long they can use your money.
  • The penalty for early withdrawal is typically several months of interest, so only put money in a CD if you will not need it before the term ends.
  • When your CD matures, you receive your full deposit plus all earned interest, and you can then choose to withdraw or reinvest the money.
  • CDs are insured by the FDIC (at banks) or NCUA (at credit unions) up to $250,000 per account, making them a safe place to store money.

How the interest rate and term length work together

CD rates change based on what the Federal Reserve does with interest rates, and they also vary from one bank or credit union to another. When the Fed raises rates, new CDs pay more. When rates fall, new CDs pay less. The rate you lock in on the day you open your CD stays the same for the entire term — that is the point of a "fixed" rate.

Longer terms usually pay higher rates than shorter ones. A one-year CD might pay 4.5%, while a five-year CD at the same bank might pay 5.2%. The bank is willing to pay more because they want to keep your money longer. However, this also means you are taking on more risk: if rates rise sharply after you lock in your CD, you will be stuck earning the lower rate you agreed to.

Some banks offer "bump-up" or "step-up" CDs that let you increase your rate once during the term if rates rise, but these usually start at a slightly lower rate than a standard CD. Others offer "no-penalty" CDs that let you withdraw early without a penalty, but the interest rate is lower to offset that flexibility.

What happens when your CD reaches maturity

When the term ends, your CD "matures." At that point, the bank or credit union will notify you (usually by mail or email) that your money is available. You then have a window — typically 7 to 10 days — to decide what to do with it.

You can withdraw the full amount (your deposit plus all interest earned). You can open a new CD with the same institution, either for the same term or a different one. Or you can move the money to a different bank or credit union if you find a better rate elsewhere. If you do nothing during the grace period, many banks will automatically roll your CD into a new one at the current rate — so check your mail and make a deliberate choice rather than letting this happen by accident.

The penalty for withdrawing early

If you need your money before the CD matures, you can withdraw it, but you will pay an early withdrawal penalty. This penalty is usually expressed as a number of months of interest. A CD with a three-month interest penalty means you lose three months' worth of the interest you would have earned. On a $10,000 CD earning 5% annually, that is roughly $125.

The penalty amount depends on the CD's term and the bank's rules. Longer-term CDs often have larger penalties. Some banks charge a flat fee instead of an interest-based penalty. Before you open a CD, read the disclosure document to see exactly what the penalty is — it should be clearly stated.

The key question to ask yourself before opening any CD is: will I need this money before the term ends? If the answer is yes, a regular savings account is safer, even if the interest rate is lower. If the answer is no, a CD is a straightforward way to earn more on money you were not planning to touch anyway.

How CDs compare to other savings options

A high-yield savings account also pays more interest than a standard savings account, but it does not lock your money away. You can withdraw whenever you want without a penalty. The tradeoff is that high-yield savings accounts typically pay slightly less than CDs of the same length. Right now, high-yield savings might pay 4.5% while a one-year CD pays 5%, but that gap changes as rates move.

Money market accounts are another option — they work like savings accounts but often pay higher interest, though they may require a larger minimum deposit. Treasury bills and bonds are government-backed alternatives that also lock money away for a set period and pay interest, but they work differently and are bought through a brokerage rather than a bank.

The choice between these options depends on when you might need the money and how much interest rate difference matters to you. If you have money you will not touch for two years, a two-year CD might earn you $500 more than a high-yield savings account. If you might need the money in six months, the CD penalty could wipe out all that extra interest, making the savings account the smarter choice.

FDIC and NCUA insurance protection

Money in a CD at a bank is insured by the FDIC (Federal Deposit Insurance Corporation) up to $250,000 per depositor, per bank. If the bank fails, you get your money back. Money in a CD at a credit union is insured by the NCUA (National Credit Union Administration) with the same $250,000 limit.

This insurance covers your deposit plus all interest earned, up to the $250,000 total. If you have $250,000 in one CD at one bank, it is fully protected. If you have $300,000 in CDs at the same bank, only $250,000 is covered. To protect more than $250,000, you would open CDs at different banks, since the insurance limit applies per institution, not per account.

Frequently Asked Questions

Can I withdraw money from a CD before it matures?

Yes, but you will pay an early withdrawal penalty, usually equal to a few months of interest. The exact penalty depends on the CD's term and your bank's rules. Before opening a CD, ask what the penalty is so you know the cost if you need the money early.

What is the difference between a CD and a savings account?

A CD locks your money for a set term and pays a higher interest rate in exchange. A savings account lets you withdraw anytime without penalty but pays less interest. Choose a CD if you will not need the money for months or years; choose a savings account if you might need it sooner.

Do I have to pay taxes on CD interest?

Yes. Interest earned on a CD is taxable income in the year it is earned. Your bank will send you a 1099-INT form at tax time showing how much interest you earned. This is true even if you do not withdraw the money yet.

What happens if I do nothing when my CD matures?

Most banks automatically roll your CD into a new one at the current rate if you do not act during the grace period. This can work against you if rates have fallen. Check your mail when your CD is about to mature and make a deliberate choice about what to do with the money.

Is a CD a good place to keep emergency money?

No. Emergency money should stay in a regular or high-yield savings account where you can access it instantly without a penalty. CDs are best for money you know you will not need for a specific period — like a down payment you are saving for over the next three years.