What happens when you open a CD

When you open a certificate of deposit, you give a bank or credit union a lump sum of money for a fixed period — typically three months to five years, though some institutions offer longer terms. In exchange, the institution pays you a set interest rate that does not change. You cannot withdraw that money before the term ends without paying a penalty, usually a loss of some or all of the interest you would have earned.

The bank uses your money during that time and returns your full deposit plus the interest when the term matures. The interest rate is locked in on the day you open the account, so you know exactly how much you will have at the end.

CDs are different from savings accounts because the rate does not fluctuate, and you commit to leaving the money untouched. They are different from bonds because you deal directly with a bank or credit union, not a secondary market, and the FDIC or NCUA insures them up to $250,000 per account owner per institution.

Key Takeaways

  • A CD requires you to deposit money for a set term — usually three months to five years — and leave it there until maturity to avoid an early withdrawal penalty.
  • The interest rate is fixed when you open the account and does not change, so you know your exact return before you commit your money.
  • Early withdrawal penalties vary by institution and term length; some charge a flat fee, others charge a percentage of interest earned or a portion of principal.
  • When your CD matures, you can withdraw the money, open a new CD at the current rate, or let it roll over automatically if your institution offers that option.
  • CDs are insured by the FDIC (banks) or NCUA (credit unions) up to $250,000 per account owner per institution.

How the interest rate and term length work together

The interest rate on a CD depends on two things: the current market rate and how long you lock your money away. Longer terms usually come with higher rates because the bank has use of your money for a longer period. A five-year CD typically pays more than a three-month CD opened on the same day.

The rate you receive is set the moment you open the account. If rates rise after you open your CD, your rate stays the same. If rates fall, you keep your higher rate. This is why the term length matters: you are trading access to your money now for a may provide return later.

Interest compounds on a schedule set by the institution — daily, monthly, or quarterly are common. The more frequently it compounds, the slightly more you earn, though the difference is usually small. You do not receive the interest until the CD matures unless you withdraw it early and accept the penalty.

What happens if you need the money before maturity

Early withdrawal penalties exist because the bank counts on having your money for the full term. The penalty structure varies widely. Some institutions charge a flat fee — say, $25 or $50. Others charge a percentage of the interest you have earned so far, such as three months' worth of interest. A few charge a percentage of principal, which is more severe.

Before you open a CD, ask the institution what the early withdrawal penalty is. It should be in writing in the account agreement. Some banks offer "no-penalty CDs" that let you withdraw without a penalty, but these pay lower interest rates to offset that flexibility.

If you withdraw early, you receive your principal back minus the penalty. The penalty comes out of the interest you have earned, or from your principal if the penalty exceeds the interest. You do not owe taxes on the withdrawal itself, but you do owe income tax on any interest you earned before withdrawing, even if the penalty consumed it.

What maturity means and what your options are

When your CD term ends, it has matured. On that date, your money is available to withdraw without penalty. The institution will notify you before maturity — usually 10 to 30 days in advance — and tell you what happens next.

You have three main options. First, you can withdraw the full amount — principal plus all interest earned. Second, you can open a new CD with the same institution, usually at the current rate for whatever term you choose. Third, many institutions offer automatic renewal, which rolls your CD into a new one at the current rate for the same term length if you do nothing by the maturity date.

Automatic renewal is convenient but can work against you if rates have fallen. If your CD renews automatically and you did not want it to, you usually have a grace period — often 10 days — to withdraw the money without penalty. Check your account agreement for the grace period length at your institution.

How CD ladders and bump-up CDs change the strategy

A CD ladder is a strategy where you open multiple CDs with different maturity dates — for example, one that matures in one year, one in two years, one in three years, and so on. As each one matures, you can withdraw it or roll it into a new longer-term CD. This gives you regular access to portions of your money while keeping some locked in at higher rates.

A bump-up CD lets you increase your interest rate once during the term if rates rise. You do not get the full benefit of a rate increase, but you get some of it without breaking the CD. The rules for bump-ups vary — some institutions let you bump once, others let you bump multiple times, and some limit when you can bump. Ask before you open the account.

Both strategies let you balance the security of a fixed rate with some flexibility. They do not change how the CD itself works, but they change how you use multiple CDs together.

How taxes work on CD interest

Interest you earn on a CD is taxable income in the year you earn it, even if you do not withdraw the money. The bank will send you a 1099-INT form in January showing how much interest you earned in the previous year. You report this on your tax return.

If you withdraw early and pay a penalty, the penalty does not reduce your taxable interest. You still owe tax on all the interest you earned, even if the penalty consumed part of it. This is one reason to think carefully before opening a CD with a term longer than you can commit to.

If you have a very small amount of interest — usually under $10 — some institutions may not send a 1099-INT, but you still owe tax on it if you are required to file a return.

Where to open a CD and how rates compare

You can open a CD at any bank or credit union. Rates vary significantly between institutions, even for the same term length on the same day. Online banks typically offer higher rates than brick-and-mortar banks because they have lower overhead costs.

Before you open a CD, compare rates across at least three to five institutions. A difference of 0.5% on a $10,000 CD for one year means $50 more in your pocket. Websites that aggregate CD rates can show you current offerings, though you will need to visit each institution's site to confirm the rate and open the account.

Make sure the institution is FDIC-insured (if it is a bank) or NCUA-insured (if it is a credit union). This insurance protects your deposit up to $250,000 if the institution fails. You can check FDIC or NCUA status on their websites.

Frequently Asked Questions

Can I move my CD to a different bank before it matures?

No. A CD is not transferable. If you want your money at a different institution, you must withdraw it from the current CD, pay the early withdrawal penalty, and then open a new CD elsewhere. The penalty makes this expensive, so it is usually not worth doing unless rates have risen dramatically or you have an urgent need for the money.

What happens if the bank fails while my CD is open?

The FDIC or NCUA takes over and honors your CD at the rate and term you agreed to. You receive your principal plus all interest earned up to the failure date. Your money is protected up to $250,000 per account owner per institution. If you have more than $250,000 in CDs at one bank, only $250,000 is insured.

Is a CD a good place to put money I might need soon?

Not usually. If you might need the money within a few months, the early withdrawal penalty will likely cost you more than you earn in interest. A high-yield savings account has no penalty for withdrawal and pays competitive interest, though usually slightly less than a CD. If you are certain you will not need the money for at least one year, a CD makes more sense.

Can I add money to a CD after I open it?

No. A CD is a fixed deposit for a fixed amount. You cannot add to it or withdraw from it without penalty. If you want to deposit more money, you must open a separate CD. This is another reason some people use CD ladders — they can open new CDs on different schedules.

What is the difference between a CD and a money market account?

A money market account has no fixed term and no penalty for withdrawal, but the interest rate can change at any time. A CD has a fixed rate for a set term and a penalty for early withdrawal. Money market accounts offer more flexibility; CDs offer more certainty about your return. The rate on a CD is usually higher because you give up flexibility.