CD Early Withdrawal: Calculate the Real Penalty

A CD early withdrawal penalty is usually a set number of days or months of interest, and it can be larger than the interest you have earned so far, in which case the bank takes the difference out of your deposit. To calculate the real penalty, multiply the interest rate by the amount the penalty applies to and by the penalty period in years (days divided by 365), then compare the result with the interest actually earned. This article is general education, not personal financial or tax advice; your account agreement controls the exact terms.

Key takeaways

• The penalty is set by your account agreement. Federal rules require that it be disclosed and set a minimum of 7 days' simple interest only on money withdrawn in the first six days; neither Regulation D nor Regulation DD sets a maximum.
• On a $10,000 12-month CD at 4.00%, a 90-day penalty is $98.63. Withdrawing after two months, when only $66.78 of interest has accrued, leaves $9,968.15, which is $31.85 below the original deposit.
• A penalty charged on the whole balance costs more than one charged only on the amount withdrawn: $100.62 versus $39.45 for a $4,000 partial withdrawal in the example below.
• On a regular (non-IRA) CD, the penalty is reported in Form 1099-INT box 2, which covers interest or principal forfeited, and is deducted on Schedule 1 (Form 1040).
• Breaking a CD pays only if the new rate over the remaining term beats the break-even rate: 5.26% in the 5-year example with a 365-day penalty, or 4.04% with a 180-day penalty.

CD early withdrawal penalty math

Most banks state the penalty as an amount of interest forfeited, scaled to the CD's term. As an illustration of the range, U.S. Bank describes typical industry penalties as 30 to 90 days of interest on 3-to-6-month CDs, 90 to 180 days on 1-year CDs, 90 to 365 days on 2-to-3-year CDs and 150 to 365 days on 4-to-5-year CDs. That is one bank's description of industry norms, not its own policy and not a rule; the number that counts is in your disclosure.

Three choices in the wording change the dollar amount:

• Days or months. A "3-month" penalty is roughly 90 days, but a contract may define it differently, so convert everything to the same unit.
• Simple or compounded interest. Simple interest ignores interest on interest. Compounded interest is slightly larger.
• Base amount. The penalty may apply only to the amount withdrawn, or to the whole balance even on a partial withdrawal. It may be figured on the original principal or on the current balance with interest.

simple penalty     = amount x interest_rate x days / 365
compounded penalty = amount x ((1 + interest_rate / 365) ^ days - 1)

• amount is the balance the contract says the penalty applies to
• interest_rate is the CD's stated annual interest rate as a decimal (0.04 for 4.00%), not the APY
• days is the penalty period expressed in days

Illustrative example: a $10,000 12-month CD at a 4.00% interest rate compounded monthly (a 4.07% APY) with a 90-day penalty. The simple penalty on the principal is $98.63. Compounded daily it is $99.11, and simple on a balance of $10,201.67 (six months in) it is $100.62. The method moves the figure by about $2, but the base amount matters more once a partial withdrawal is involved.

def simple_penalty(amount, rate, days):
    return amount * rate * days / 365

balance = 10_000 * (1 + 0.04 / 12) ** 6    # 10,201.67 after six months
print(round(simple_penalty(4_000, 0.04, 90), 2))     # 39.45, amount withdrawn only
print(round(simple_penalty(balance, 0.04, 90), 2))   # 100.62, whole balance

So a $4,000 partial withdrawal costs $39.45 under an "amount withdrawn" clause and $100.62 under a "whole balance" clause, which is about 2.6 times as much for the same withdrawal. When rates are low the dollars shrink: at the 1.76% national average for 12-month CDs in the FDIC's national rates release of October 19, 2026, a 90-day penalty on $10,000 is $43.40.

When the penalty cuts principal

A penalty touches principal when it exceeds the interest earned so far. U.S. Bank's page says the rest of an oversized penalty comes out of the deposit. The early weeks of a CD, and any long penalty on a long-term CD, are the danger zones.

The 12-month CD

Using the 4.00% example with a 90-day simple penalty of $98.63 on principal:

A penalty equal to 90 days of interest cannot reach principal once you have held the CD about 90 days, because by then you have earned roughly what you are forfeiting. The crossover here falls between months 2 and 3, and it stays there if the penalty is figured on the whole balance ($99.62 at three months) or compounded daily ($99.11). Two conditions matter: the penalty must be counted at the CD's own rate, and if the CD pays interest out to you along the way, compare the penalty with all interest received, not only what is still in the CD.

The 5-year CD

Take $10,000 at 4.50% compounded monthly with a 365-day penalty, which is $450.00 in simple interest. After six months the CD has earned $227.12, so cash out is $9,777.12 and $222.88 of principal is gone. After 12 months it has earned $459.40 and the loss disappears ($10,009.40 received). At 11 months it has earned $420.32 and $29.68 of principal is still lost. Long penalties push the crossover out: here it falls between months 11 and 12, not near three months.

What federal rules require

Federal rules touch the penalty in three places.

• Regulation D minimum. Under 12 CFR 204.2(c)(1)(i), a time deposit is one the depositor cannot withdraw from within six days of deposit unless it carries an early withdrawal penalty of at least seven days' simple interest on amounts withdrawn in that first six days. A time deposit that allows partial early withdrawals must impose the same minimum on amounts withdrawn within six days after each partial withdrawal. After those six-day windows Regulation D sets no minimum, and neither Regulation D nor Regulation DD sets a maximum, so the size of the penalty is a matter of the contract.
• Regulation DD disclosure. For banks, 12 CFR 1030.4(b)(6)(ii) requires account disclosures to state that a penalty will or may be imposed for early withdrawal, how it is calculated and the conditions for its assessment.
• Credit unions. The NCUA's 12 CFR 707.4(b)(6)(ii) carries the same requirement for term share accounts, which are the credit union version of a CD. Reg D's time deposit definition also lists share certificates.

When a bank may waive it

A footnote to the Regulation D time deposit definition lists cases where an institution may pay a time deposit early without the penalty "specified by this part." That penalty is only the seven-day minimum described above, so the footnote does not cancel a bank's own, larger contractual penalty. The listed cases include the death of any owner, a court or administrative determination that an owner is legally incompetent, and a withdrawal within ten days after maturity even though the contract provides for automatic renewal. U.S. Bank's page notes that some banks waive the penalty in hardship cases such as the death or disability of the account holder, but whether yours does is set by its disclosure, so ask.

Retirement accounts have their own entries in the same footnote. A time deposit held in an IRA, a Keogh (H.R. 10) plan or a 401(k) plan may be paid without the Regulation D penalty once the person the account is for reaches age 59 1/2 or is disabled (as defined in 26 U.S.C. 72(m)(7)). An IRA deposit paid out within seven days after the IRA is established is also covered, provided the depositor forfeits at least the simple interest earned on the amount withdrawn. Those are bank-penalty rules. Tax is a separate question: the IRS applies a 10% additional tax to the taxable part of IRA distributions taken before age 59 1/2, in addition to regular income tax, unless an exception applies. It applies only to money that leaves the IRA; amounts rolled over or transferred to another IRA or qualified plan are not subject to it, as long as the one-per-year limit on IRA-to-IRA rollovers is respected. Breaking an IRA CD early and keeping the money inside the IRA can therefore cost the bank penalty without the 10% tax, while taking the cash out before 59 1/2 can cost both.

Tax treatment of the penalty

The bank reports the interest you earned in Form 1099-INT box 1 without subtracting the penalty, and the 1099-INT instructions tell the payer to show "interest or principal forfeited" in box 2. You report all the box 1 interest as income, then deduct the box 2 amount. IRS Publication 550 (2025) says the penalty is deducted on Schedule 1 (Form 1040). The instructions describe the box 2 amount as deductible from gross income, so the deduction does not depend on itemizing. This applies to CDs held in regular taxable accounts: the same instructions say tax-deferred interest earned but not distributed from an IRA is not reported on Form 1099-INT.

Illustrative effect: the $400.00 penalty in the break-even case below, deducted by a taxpayer in an assumed 22% bracket, lowers tax by $88.00, so the after-tax cost is $312.00. The deduction softens the penalty but does not replace it.

When breaking a CD still pays

Leaving early pays if the cash you walk away with, reinvested for the rest of the old term, ends up above what the old CD would have paid. The break-even rate is the new rate that makes the two equal.

cash_out   = balance - penalty
old_value  = balance x (1 + old_rate / 12) ^ months_left
new_rate*  = 12 x ((old_value / cash_out) ^ (1 / months_left) - 1)

• balance is the CD value when you break it
• penalty is the dollar penalty from your agreement
• months_left is the remaining term, and the new CD is assumed to run exactly that long
• new_rate* is the break-even rate, compounded monthly

Illustrative results on $10,000, breaking after 24 months:

In the first row, a new 36-month CD at 5.50% finishes $88.15 ahead of staying put, while one at 5.00% finishes $94.15 behind. In the second row, 4.50% finishes $163.97 ahead. Compare the same one-point gap in both rows: moving from 4.00% to 5.00% loses $94.15 against a 365-day penalty, while moving from 3.50% to 4.50% gains $163.97 against a 180-day penalty. If either penalty were figured on the full balance instead of the principal, it would be $433.26 and $185.10, and the break-even rates would rise.

This ignores taxes, assumes the new CD has no penalty risk of its own, and assumes you would not need the money anyway. A rate that merely beats your old one by a point can still lose once the penalty is counted.

Frequently asked questions

Is there a grace period after a CD matures?

Under Regulation DD a bank must disclose whether an automatically renewing CD gives a grace period and how long it is (12 CFR 1030.4(b)(6)(iv)). Regulation D separately lets an institution pay a time deposit without its minimum penalty when it is withdrawn within ten days after maturity even though the contract provides automatic renewal. The grace period that applies to you is the one in your disclosure.

Can a depositor withdraw only part of a CD?

Only if the contract allows it. Regulation D says a time deposit that permits partial early withdrawals must impose the seven-day minimum penalty on amounts withdrawn within six days after each partial withdrawal. Whether the penalty is figured on the amount withdrawn or the whole balance depends on the contract, and the difference was $39.45 versus $100.62 in the example above.

Do credit union share certificates have the same penalty rules?

The Regulation D time deposit definition includes share certificates issued by credit unions. The NCUA's rule at 12 CFR 707.4(b)(6)(ii) requires the credit union to disclose that a penalty will be imposed, how it is calculated and the conditions for its assessment. The amount is still set by the credit union's own terms.

Is the penalty deductible if it was larger than the interest?

The 1099-INT instructions say box 2 covers interest or principal forfeited on an early withdrawal and that the amount is deductible from gross income by the recipient. Publication 550 says to report all the box 1 interest and deduct the penalty on Schedule 1. Neither source limits the deduction to the interest earned, but a tax preparer can confirm how it applies to your return.

How can a depositor find the exact penalty before closing?

Regulation DD requires the account disclosure to state how the penalty is calculated, so the formula is in your account agreement. Ask the bank or credit union for the dollar figure for your specific withdrawal date and amount, in writing if possible, and confirm whether it comes from interest only or can reduce principal.

A checklist before you break a CD

1. Find the penalty clause: days or months, simple or compounded, and the base amount (withdrawn sum or whole balance).
2. Compute the dollar penalty with the simple formula and compare it with interest earned to date.
3. If you are reinvesting, compute the break-even rate for the remaining term and compare it with offers whose terms you have read.
4. Ask whether your bank waives its penalty in your situation (death of an owner, legal incompetence, age 59 1/2 or disability on a retirement CD, the window after maturity); the disclosure, not Regulation D, decides.
5. For an IRA CD, decide whether the money stays in the IRA; taking it out before 59 1/2 can add the 10% additional tax.
6. For a regular CD, keep Form 1099-INT; deduct box 2 on Schedule 1.

Sources

• 12 CFR 204.2, Regulation D definitions (eCFR)
• 12 CFR 1030.4, Regulation DD account disclosures (eCFR)
• 12 CFR 707.4, NCUA account disclosures (eCFR)
• Instructions for Form 1099-INT, IRS
• Publication 550 (2025), IRS
• Topic 557, Additional tax on early distributions from traditional and Roth IRAs, IRS
• National rates and rate caps, FDIC (as of October 19, 2026)
• CD early withdrawal penalty, U.S. Bank