A bank certificate is a savings product where you give the bank a fixed amount of money for a set period, and they pay you a may provide interest rate in return.
The most common type is a Certificate of Deposit (CD). You deposit money—anywhere from $500 to $100,000 or more, depending on the bank—and agree to leave it untouched for a specific term. That term might be three months, six months, one year, three years, or five years. In exchange, the bank locks in an interest rate that is higher than what you would earn in a regular savings account.
The trade-off is simple: you cannot touch the money without a penalty. If you withdraw before the term ends, the bank charges you a fee—usually a few months' worth of interest. You know exactly how much you will have at the end because the rate does not change, and the FDIC insures deposits up to $250,000 per bank, per account type.
Key Takeaways
- A CD locks your money for a set term (three months to five years) in exchange for a higher interest rate than a savings account offers.
- You pay a penalty if you withdraw early, typically equal to a few months of the interest you would have earned.
- Your deposit is FDIC insured up to $250,000, so your principal is protected even if the bank fails.
- Interest rates on CDs vary by bank, term length, and market conditions—shopping around can mean hundreds of dollars in difference.
- CDs are best for money you know you will not need for several months or years.
How the interest rate and term work together
The longer you commit your money, the higher the interest rate usually is. A three-month CD might pay 4.5 percent annual percentage yield (APY), while a five-year CD at the same bank might pay 4.8 percent. That extra 0.3 percent does not sound like much, but on $10,000 over five years, it adds up.
The rate is fixed for the entire term. If you open a one-year CD at 4.75 percent APY and interest rates drop to 2 percent six months later, you still earn 4.75 percent. The flip side: if rates rise to 6 percent, you are locked in at 4.75 percent. When the term ends, the bank will offer you a new rate based on what the market looks like at that moment.
Interest compounds—usually daily or monthly—which means you earn interest on your interest. The bank calculates this automatically and adds it to your balance. At maturity (when the term ends), you receive your original deposit plus all the interest earned.
What happens when your CD reaches maturity
When the term ends, you have a window—usually 7 to 10 days—to decide what to do with the money. You can withdraw it, move it to another account, or let it roll over into a new CD at whatever rate the bank is offering at that time.
If you do nothing and the bank's automatic renewal is turned on, your money will roll into a new CD with the same term length but at the current rate. This can work in your favor if rates have risen, or against you if they have fallen. Many people miss this window and end up in a new CD without realizing it. Check your bank's renewal policy and set a calendar reminder a week before maturity.
The early withdrawal penalty and when it matters
If you need the money before the term ends, you will pay a penalty. The amount varies by bank and term length. A bank might charge three months of interest on a six-month CD, or six months of interest on a two-year CD. On a small balance or short term, this might be $20 to $50. On a large balance or long term, it could be several hundred dollars.
The penalty comes out of your interest earnings first. If you have not earned enough interest yet, it comes out of your principal. For example, if you open a $5,000 one-year CD at 4.5 percent APY and withdraw after three months, you have earned about $56 in interest. If the penalty is three months of interest ($56), you get your $5,000 back with nothing extra. If the penalty is six months ($112), you get back $4,944.
Some banks offer CDs with no penalty for early withdrawal, though the interest rate is usually lower to compensate. If you think you might need the money, ask about this option.
Shopping for CDs: where rates differ and why
Not all banks offer the same rate on the same CD term. A large national bank might offer 4.2 percent APY on a one-year CD, while an online bank offers 4.8 percent on the same term. Over one year on $10,000, that 0.6 percent difference equals $60 in extra interest.
Online banks and credit unions often pay higher rates than brick-and-mortar banks because they have lower overhead costs. You can compare rates across banks using sites like Bankrate, DepositAccounts, or the banks' own websites. Rates change daily, so check a few days before you plan to open a CD.
The FDIC insurance limit is per bank, not per CD. If you have $250,000 in one bank's CDs, that is fully covered. If you have $300,000, the extra $50,000 is not. If you want to hold more than $250,000 in CDs and keep it all insured, you need to split it across different banks.
CDs versus savings accounts and money market accounts
A regular savings account is more flexible—you can withdraw money anytime without penalty—but the interest rate is much lower, often under 0.5 percent APY at large banks. A CD pays more because you commit to leaving the money alone.
A money market account sits in the middle. It usually pays more than a savings account but less than a CD, and it gives you limited check-writing or debit card access while still requiring you to keep a minimum balance. If you might need the money within a few months, a money market account is safer than a CD. If you know you will not touch it for a year or more, a CD usually pays better.
Laddering CDs to balance safety and access
One strategy is to open multiple CDs with different maturity dates. For example, you might open five one-year CDs, each with $2,000. One matures every few months, giving you regular access to money without paying an early withdrawal penalty. This is called laddering.
Laddering works best when you have a lump sum to invest and want to keep some money accessible while still earning CD rates on most of it. As each CD matures, you can decide whether to spend the money, reinvest it in a new CD, or move it to a savings account. It requires more bookkeeping but gives you flexibility that a single long-term CD does not.
Frequently Asked Questions
Can I add money to a CD after I open it?
No. A CD is a fixed deposit for a fixed term. Once you open it, you cannot add more money. If you want to invest additional funds, you must open a separate CD. Some banks let you open multiple CDs at once with different terms.
What if the bank fails while my money is in a CD?
The FDIC insures your deposit up to $250,000, so you will receive your full balance plus any accrued interest. The FDIC will transfer your account to another bank or send you a check. This protection applies even if the bank closes unexpectedly.
Do I pay taxes on CD interest?
Yes. The interest you earn on a CD is taxable income. The bank will send you a 1099-INT form at the end of the year showing how much interest you earned. You report this on your tax return. If you earn $10 or more in interest, you will receive the form.
Is there a minimum amount I have to deposit?
Most banks require a minimum deposit to open a CD, usually between $500 and $2,500. Some online banks have no minimum. Check the bank's website or call to confirm before you open an account.
Can I move a CD to a different bank?
You can withdraw the money and open a new CD elsewhere, but you will pay the early withdrawal penalty at your current bank. You cannot transfer a CD directly to another bank without closing it first. If the penalty is high, it might not be worth moving until the CD matures.