A 3-month CD locks your money away for exactly three months in exchange for a fixed interest rate

A 3-month certificate of deposit is a savings product where you give a bank or credit union a lump sum of money and agree not to touch it for three months. In return, the institution pays you a set interest rate—higher than what you'd earn in a regular savings account. At the end of three months, you get your original money back plus the interest you earned.

The trade-off is simple: you lose access to your cash for those 90 days. If you need the money before the three months are up, you'll pay an early withdrawal penalty—usually a few months' worth of interest. The bank or credit union sets both the interest rate and the penalty amount when you open the CD, so you know both numbers upfront.

Three-month CDs are the shortest term available at most institutions. They're useful if you have money you won't need immediately but don't want to lock it away for a year or longer.

Key Takeaways

  • Your money earns a fixed interest rate for exactly three months, and you cannot withdraw it without paying a penalty.
  • The interest rate and early withdrawal penalty are set when you open the CD and do not change during the term.
  • At maturity (after three months), you receive your principal plus all accrued interest in a lump sum.
  • You must decide before maturity whether to withdraw the money, renew the CD at the current rate, or move it elsewhere.
  • Interest earned on a CD is taxable income in the year you receive it, even if you reinvest the money.

How the interest rate and term work together

When you open a 3-month CD, the bank tells you the annual percentage yield (APY)—the rate you'll earn if the money stayed in the account for a full year. Since your money is only there for three months, you earn roughly one-quarter of that annual rate. If a CD offers 4.50% APY, you'll earn about 1.125% on your deposit over three months.

The exact amount depends on how the bank calculates interest. Most use daily compounding, meaning interest accrues a tiny bit each day and gets added to your balance. Some use monthly or quarterly compounding instead. The difference is small on a three-month term, but it's worth asking your bank which method they use.

The rate is locked in the moment you fund the CD. If rates drop the next day, you keep your original rate. If rates rise, you're stuck with the lower rate until maturity. This is why timing matters: opening a CD right before a rate increase means you miss out on the higher return.

What happens when your CD reaches maturity

On day 91 (or the exact maturity date your bank specifies), your CD term ends. Your bank will automatically deposit your principal plus all earned interest into the account you linked when you opened the CD—usually a checking or savings account at the same institution.

Most banks give you a grace period—typically 7 to 10 days—during which you can decide what to do next. You can withdraw the money, let it sit in your linked account, or tell the bank to roll it into a new CD. If you do nothing and the grace period expires, many banks automatically renew the CD at whatever the current rate is. Read your CD agreement to see what your bank does by default.

If you want to move the money elsewhere—to a different bank or a different type of account—the maturity date is the easiest time to do it without a penalty. Some banks will transfer it for you; others require you to withdraw it first and then move it yourself.

Early withdrawal penalties and when they apply

If you need your money before the three months are up, you can withdraw it, but you'll lose some of the interest you earned. The early withdrawal penalty is usually expressed as a number of months of interest. A common penalty is three months of interest, meaning if your CD would have earned $45 over three months, you'd lose $45 if you withdrew after one month.

Some banks calculate the penalty differently—as a percentage of your principal or a flat dollar amount. Always ask what the penalty is before you open the CD. On a small deposit, the penalty might be just a few dollars. On a larger one, it could be substantial.

The penalty comes out of your interest earnings first. If your penalty is larger than the interest you've earned so far, the bank takes the difference from your principal. This means you could get back less money than you put in if you withdraw very early. For example, if you deposit $5,000, earn $50 in interest after one month, and the penalty is $150, you'd receive $4,900 back.

Where to find 3-month CDs and compare rates

Traditional banks, online banks, and credit unions all offer 3-month CDs. Online banks typically offer higher rates than brick-and-mortar banks because they have lower overhead costs. Credit unions sometimes offer competitive rates to their members.

To compare rates, visit the websites of banks you're considering or use a rate-comparison tool that aggregates current CD offers. Look at the APY, the early withdrawal penalty, and whether the bank compounds interest daily or less frequently. A slightly higher rate at one bank might be offset by a steeper penalty at another.

Make sure the bank or credit union is insured by the Federal Deposit Insurance Corporation (FDIC) or the National Credit Union Administration (NCUA). This insurance protects your deposit up to $250,000 if the institution fails. Most banks and credit unions carry this insurance, but it's worth confirming.

Tax treatment of CD interest

Interest you earn on a CD is taxable income. You'll receive a Form 1099-INT from your bank in January showing how much interest the CD earned during the previous year. You must report this on your tax return, even if you reinvested the money into another CD.

The tax is due in the year you earned the interest, not the year you withdraw the money. If you open a CD on December 15 and it matures on March 15 of the next year, the interest earned in December is taxable in the year you opened it, and the interest earned in January through March is taxable in the following year.

If you're in a high tax bracket, this is worth considering. A CD earning 4.50% APY might net you only 3% after taxes if you're in the 33% federal tax bracket. Some people use CDs in tax-advantaged accounts like IRAs to avoid this, though rules vary by account type.

3-month CDs versus other short-term savings options

A 3-month CD is not the only way to earn interest on cash you won't need immediately. High-yield savings accounts offer rates competitive with CDs but let you withdraw money anytime without penalty. The trade-off is that savings account rates can change monthly, while CD rates are locked in.

Money market accounts are another option—they're similar to savings accounts but sometimes offer slightly higher rates in exchange for higher minimum balances. Treasury bills (short-term government debt) also come in 3-month terms and are backed by the U.S. government, though they require a minimum investment and are less convenient to buy than CDs.

If you think you might need the money within three months, a high-yield savings account is safer because you avoid the early withdrawal penalty. If you're confident you won't touch the money, a CD locks in a may provide rate, which protects you if rates fall.

Frequently Asked Questions

Can I withdraw money from a 3-month CD before it matures?

Yes, but you'll pay an early withdrawal penalty. The penalty is usually a few months of interest, though it varies by bank. You'll receive your principal minus the penalty, and possibly minus some of your earned interest if the penalty is large. Check your CD agreement for the exact penalty amount before you open the account.

What happens if I don't withdraw my money when the CD matures?

Most banks automatically renew your CD at the current rate if you don't act during the grace period (usually 7 to 10 days after maturity). Some banks instead move the money to a linked savings or checking account. Read your CD agreement or call your bank to confirm what happens by default at your institution.

Is a 3-month CD better than a savings account?

A 3-month CD usually offers a higher interest rate than a savings account, but you lose access to your money for three months. If you're certain you won't need the cash during that time, the CD's higher rate makes it worthwhile. If you might need the money sooner, a high-yield savings account is safer because you can withdraw anytime without a penalty.

How much interest will I earn on a 3-month CD?

The amount depends on your deposit size and the CD's APY. If you deposit $10,000 in a CD offering 4.50% APY, you'll earn roughly $112.50 over three months (one-quarter of the annual rate). Use your bank's CD calculator or multiply your deposit by the APY and divide by four to estimate your earnings.

Do I have to pay taxes on CD interest?

Yes. Interest earned on a CD is taxable income in the year you earn it. Your bank will send you a Form 1099-INT in January showing the interest earned during the previous year. You report this on your tax return, regardless of whether you withdrew the money or reinvested it into another CD.