What to Know Before Locking Money in a CD

Before locking money in a CD, read four things in the account agreement: how the early-withdrawal penalty is calculated, whether the CD renews automatically and for how long you can still act after maturity, whether the full balance is covered by deposit insurance, and how the interest will be reported for taxes. The rate is the part everyone compares; these four terms decide what the CD costs you if your plans change.

Key takeaways

• Federal rules require a bank or credit union to disclose the maturity date, whether an early-withdrawal penalty applies, how it is calculated and when it is charged, and whether the CD renews automatically (and whether a grace period exists).
• A penalty measured in months of interest can exceed what a young CD has earned, so leaving early can cost more than the interest you collected. On Form 1099-INT, the penalty can include forfeited principal.
• Deposit insurance is $250,000 per depositor, per insured institution, per ownership category, and it counts principal plus accrued interest.
• CD interest is taxable even without a Form 1099-INT, and an early-withdrawal penalty is deducted separately on Schedule 1 (Form 1040), line 18 on the 2025 form, without itemizing.

What a CD commits you to

A certificate of deposit is a deposit account with a fixed term. In exchange for leaving the money in place until the maturity date, the bank or credit union generally pays a fixed rate. The Consumer Financial Protection Bureau says that withdrawing early means paying a penalty fee, and that the term should match when you expect to need the money.

The term works in both directions. A fixed rate protects you if market rates fall and leaves you behind if they rise. The FDIC's CD shopping guide also warns about callable CDs, which give the bank the right to close the account early. If rates drop, the bank can repay you and the money has to be reinvested at the lower rate, so the long rate you expected to lock in may not last. The agreement states whether a CD is callable. The same guide notes that most market-linked CDs, whose return is tied to a market index, do not allow early redemption at all.

One common way to manage the timing risk is a ladder: splitting a deposit across CDs that mature at staggered dates, so that part of the money comes free at regular intervals. A ladder does not change any penalty; it only reduces how much money is tied to a single date.

Reading the early-withdrawal fee

Under Regulation DD, the Truth in Savings rule, a bank must tell you before you open a time account that a penalty will or may be imposed for early withdrawal, how it is calculated, and the conditions for charging it. The same disclosure must give the maturity date. The text is in 12 CFR 1030.4(b)(6). The regulation does not set the size of the penalty; the bank does, so it varies by institution and by term. Regulation DD covers banks and savings institutions but not credit unions, which follow the NCUA's parallel Truth in Savings rule. Its 12 CFR 707.4(b)(6) lists the same disclosure items for share certificates, which the rule calls term share accounts.

A separate federal rule sets a minimum for the first week only. Under Regulation D, a deposit counts as a time deposit only if the depositor cannot withdraw within six days after the deposit, or any such withdrawal costs at least seven days of simple interest. Apart from that minimum, which also applies for six days after any partial early withdrawal, neither rule sets a penalty; the account agreement does.

Two details in the disclosure are easy to skip. First, if interest compounds during the term and can be withdrawn early, the bank must state that the annual percentage yield (APY) assumes the interest stays on deposit until maturity and that a withdrawal reduces earnings. The advertised APY is therefore the best case, not a forecast for an early exit. Second, the penalty can reach past the interest. The IRS instructions for Form 1099-INT describe box 2 as interest or principal forfeited because of an early withdrawal from a time deposit, such as a CD.

A worked penalty example

Illustrative example. Assume a $10,000, 12-month CD at 4.50% APY, with a penalty of three months of interest. For simplicity, the penalty is calculated here as the interest the deposit earns in three months at that yield (a bank's own formula may use the stated rate or the amount withdrawn, so the exact figure differs). The deposit earns interest of 10,000 × (1.045^(m/12) − 1) after m months.

The break-even point is month 3: before it, you leave with less than you deposited, because the penalty is larger than the interest and the shortfall comes out of principal. At month 6 you keep $111.87, about a quarter of the $450 a full term would have paid. The penalty is a fixed amount in this example, so it hurts most early in the term. Banks that tie the penalty to the remaining term, or to a percentage of principal, produce a different curve, which is why the formula matters more than the headline rate.

Maturity, renewal and grace period

When the term ends, many CDs renew automatically into a new term. The disclosure rule requires the bank to say whether that happens and, if it does, whether a grace period follows and how long it lasts. Regulation DD does not require a grace period or set its length; it only requires that the account agreement says whether there is one.

For automatically renewing time accounts longer than one month, 12 CFR 1030.5(b) requires a renewal notice mailed or delivered at least 30 calendar days before maturity. The alternative is at least 20 calendar days before the end of the grace period, if the bank allows a grace period of at least five calendar days. For terms longer than one year the notice must carry the full account disclosures for the new CD, and for terms of one year or less it can be a shorter notice stating the new maturity date, the new rate and APY if known, and any change in terms. If the new rate is not yet set, the notice must say when it will be and give a phone number for the rate. Credit unions must meet the same timing for share certificates under 12 CFR 707.5.

For CDs longer than one year that do not renew automatically, section 1030.5(c) requires a notice of the maturity date, and of whether interest will be paid after maturity, at least 10 calendar days before maturity.

The practical consequence is that the new rate can differ from the old one. The FDIC guide suggests checking whether a renewal happens at the old rate or the current rate. Put the maturity date and the end of any grace period in a calendar, then decide in advance whether the money will be withdrawn, renewed, or moved to a different CD.

Insurance limits for CDs

FDIC deposit insurance, which covers CDs, is $250,000 per depositor, per insured bank, for each account ownership category. As the FDIC's CD guide states, the limit includes principal and accrued interest, so a CD close to the limit may push you over once interest accrues. The FDIC's deposit insurance overview explains that all deposits in the same ownership category at the same insured bank are added together, and that categories such as single, joint, certain retirement accounts and trust accounts are insured separately.

At credit unions, share certificates are covered by the National Credit Union Administration. NCUA share insurance is also $250,000 per ownership category at each federally insured credit union, and it covers principal and posted dividends.

Brokered CDs add one step. The FDIC says it does not license or register deposit brokers, and that if a broker does not place your funds in a CD at an FDIC-insured bank, the money is not FDIC-insured. Confirm the issuing bank by name and check that it is FDIC-insured (the FDIC points to its BankFind tool for this), confirm in the documents that the product is a deposit and not an uninsured investment, and count it with any other deposits you hold at that bank in the same ownership category.

How CD interest is taxed

CD interest is taxable income. IRS Topic 403 says you must report all taxable interest on your return even if you receive no Form 1099-INT; a bank sends the form for interest of $10 or more. What the bank shows and what you report are different things: the bank reports the interest it paid or credited in box 1 and any early-withdrawal forfeiture in box 2, and you report the full box 1 amount as interest and claim the box 2 amount separately.

Timing depends on the term. IRS Publication 550 says interest paid at intervals of a year or less, or paid once at maturity on an account of a year or less, is generally taxed when you receive it or are entitled to it without a substantial penalty. For a CD with a maturity of more than one year where interest is deferred, a part of the total interest is included in income each year as original issue discount, reported on Form 1099-OID, even though you have not been paid. Pub. 550 also treats a renewal at maturity as a redemption and a purchase of a new certificate.

An early-withdrawal penalty is not netted against the interest. Pub. 550 says you include all the interest shown in box 1 and deduct the penalty on Schedule 1 (Form 1040), line 18. On the 2025 Schedule 1 that line sits in Part II, Adjustments to Income, so you can claim it without itemizing. In the worked example above, a withdrawal in month 2 would leave $73.63 of taxable interest and a $110.65 deduction for the penalty (hypothetical figures; the amounts on your forms come from your bank). Tax treatment depends on your situation, and a CD held inside an IRA follows the IRA's rules rather than these.

Frequently asked questions

Can an early-withdrawal penalty take some of my principal?

Yes, it can. Regulation DD requires the bank to disclose how the penalty is calculated, but sets no cap, and the IRS describes box 2 of Form 1099-INT as interest or principal forfeited. If the CD has earned less than the penalty, the difference comes out of the deposit.

What happens if I do nothing when my CD matures?

If the account renews automatically, it generally rolls into a new term, and the renewal notice must state the new maturity date, the new rate if known, and any changed terms. For an automatically renewing CD with a term longer than one month, the bank or credit union must send a notice before maturity, and you may have a grace period, if the agreement provides one, to withdraw or change the term without a penalty. If the CD does not renew automatically, the agreement must say whether interest is paid after maturity.

Is a credit union CD insured like a bank CD?

A share certificate at a federally insured credit union is covered by NCUA share insurance, up to $250,000 per ownership category per credit union. The insurance is separate from the FDIC, so balances at a bank and at a credit union are not added together.

Does a CD count toward the same $250,000 as my savings account?

Yes, if both are at the same insured bank and in the same ownership category. The FDIC adds all deposits in an ownership category at one bank together, including principal and accrued interest. A joint account or a retirement account at that bank is a different category, with its own limit.

Do I owe tax on CD interest I never withdrew?

Often yes. Interest credited to an account that you can withdraw from without a substantial penalty is generally taxable in that year, and CDs longer than one year with deferred interest accrue taxable interest annually. The IRS asks you to report all interest whether or not you receive a Form 1099-INT.

Before you fund a CD: a checklist

1. Write down the maturity date and the earliest date you might need the money, then compute the penalty at that date using the bank's formula, as in the table above.
2. Find the disclosure lines on renewal: whether it renews automatically, whether there is a grace period, and how long it lasts. Add both dates to a calendar.
3. Check whether the CD is callable, and when the bank may call it.
4. Confirm the issuer name, count the balance and expected interest against the $250,000 limit in your ownership category, and for a brokered CD confirm the issuing bank.
5. Keep a separate cash reserve for needs inside the term, so the CD does not have to be broken.
6. Plan for the tax forms: Form 1099-INT or 1099-OID, and Schedule 1, line 18 if a penalty is paid.

This article is general education, not tax or investment advice. Terms differ by institution, so the CD's own agreement and disclosures control.

Sources

• 12 CFR 1030.4, Account disclosures (Regulation DD), eCFR
• 12 CFR 1030.5, Subsequent disclosures (Regulation DD), eCFR
• 12 CFR 707.4, Account disclosures (NCUA Truth in Savings), eCFR
• 12 CFR 707.5, Subsequent disclosures (NCUA Truth in Savings), eCFR
• 12 CFR 204.2, Definitions (Regulation D), eCFR
• What is a certificate of deposit (CD)?, Consumer Financial Protection Bureau
• Shopping for a Certificate of Deposit?, FDIC
• Understanding Deposit Insurance, FDIC
• Share insurance coverage, NCUA
• Topic no. 403, Interest received, IRS
• Instructions for Forms 1099-INT and 1099-OID, IRS
• Publication 550, Investment Income and Expenses (2025), IRS