To calculate a CD early withdrawal penalty, multiply the amount you’re withdrawing by the CD’s nominal annual interest rate, divide by 365, and multiply by the number of penalty days your bank specifies in the deposit agreement. On a $10,000 withdrawal from a 4% CD with a 180-day penalty, that works out to about $197. The rate, the penalty period, and a few situations that can change the result are all in the agreement you signed when you opened the account.
What You Need From Your Deposit Agreement
Federal disclosure rules require your bank to state the penalty formula upfront in the Truth in Savings disclosure, usually under a heading like “Early Withdrawal.”1eCFR. 12 CFR Part 1030 – Truth in Savings (Regulation DD) Pull four numbers before you start:
- The principal balance in the CD before any pending interest is credited.
- The nominal annual interest rate, not the APY. The penalty uses simple interest, so the compounding baked into the APY would inflate the result.
- The penalty period, expressed as a number of days or months of interest. Common values are 90, 180, or 365 days.
- Whether the bank calculates the penalty by day count, by month count, or as a flat fee. Most use day count.
The disclosure will spell it out in language like “the fee imposed will equal ___ days of interest.”
The Three-Step Calculation
The formula charges you the interest your money would have earned over the penalty window, whether or not you’ve actually earned it yet.
Step 1: Daily Interest Rate
Divide the nominal annual rate by 365 (or 366 in a leap year). For a 4% CD:
0.04 ÷ 365 = 0.00010959
Keep the full decimal. Rounding early throws off the final number.
Step 2: Penalty Factor
Multiply the daily rate by the number of penalty days. For 180 days:
0.00010959 × 180 = 0.019726
Step 3: Apply to the Withdrawal
Multiply the factor by the dollars you’re pulling out. On a $10,000 withdrawal:
0.019726 × $10,000 = $197.26
That $197.26 is what the bank keeps. On the same CD with a 90-day penalty, the charge falls to roughly $98.63. With a 365-day penalty, it climbs to about $400.
If Your Bank Uses Months Instead of Days
Some agreements state the penalty in months. Divide the annual rate by 12 and multiply by the penalty months. For 4% and six months on $10,000:
(0.04 ÷ 12) × 6 × $10,000 = $200.00
The small gap between $197.26 and $200.00 comes from six calendar months not lining up to exactly 180 days. Use the method your agreement names.
Typical Penalty Periods by CD Term
If you don’t have the agreement in front of you, banks generally scale the penalty to the length of the term. A common pattern:
- CDs of 12 months or less: 90 days of simple interest.
- CDs longer than 12 months but shorter than 48 months: 180 days.
- CDs of 48 months or more: 365 days.
Every bank sets its own schedule, so treat this as an expectation, not a rule. Confirm the number in your disclosure.
When the Penalty Eats Into Your Principal
If you break the CD before it has earned enough interest to cover the penalty, the bank takes the shortfall out of your deposit. You get back less than you put in.2Internal Revenue Service. Instructions for Forms 1099-INT and 1099-OID Say you opened a $10,000 CD two months ago and have earned $66 in interest, but the penalty is $197. The bank absorbs the $66 and deducts the remaining $131 from principal. You receive $9,869.
Partial withdrawals work the same way at some banks, with the penalty applied only to the amount removed. Others require you to close the full CD if pulling money out would drop the balance below a minimum. A forced closure means the penalty applies to the entire balance, not just the piece you meant to withdraw. Check the agreement for a minimum balance requirement before requesting a partial withdrawal.
When the Penalty Doesn’t Apply
Federal regulations recognize two situations in which an early withdrawal from a time deposit is not subject to the standard penalty: the death of an account owner, and a court determination that an account owner is legally incompetent.3eCFR. 12 CFR 204.2 – Definitions
Beyond those, any waiver is bank policy. Some institutions waive the penalty on IRA CDs when the owner needs to take a required minimum distribution. Some have internal discretion to reduce the charge in hardship situations. Calling to ask costs nothing.
There’s also the maturity grace period. Banks must disclose whether one exists and how long it lasts, and auto-renewing CDs must offer at least five calendar days.4eCFR. 12 CFR Part 1030 – Truth in Savings (Regulation DD) – Section 1030.4(b)(6)(iv)5eCFR. 12 CFR 1030.5 – Subsequent Disclosures Withdraw during that window and no penalty applies. Miss it, and the CD rolls into a new term with a fresh penalty schedule.
Deducting the Penalty on Your Taxes
The penalty is deductible on your federal return whether or not you itemize. The Internal Revenue Code treats the forfeited amount as an adjustment to gross income, so it reduces taxable income even for taxpayers who take the standard deduction.6Office of the Law Revision Counsel. 26 USC 62 – Adjusted Gross Income Defined
Your bank will report the penalty in Box 2 of Form 1099-INT for the year of the withdrawal. Box 1 will show the full interest earned without subtracting the penalty, so both numbers need to be reported separately.2Internal Revenue Service. Instructions for Forms 1099-INT and 1099-OID Enter the penalty on Schedule 1 (Form 1040), Line 18, “Penalty on early withdrawal of savings.”7Internal Revenue Service. 2025 Schedule 1 (Form 1040) – Additional Income and Adjustments to Income The Schedule 1 total flows to Line 10 of your Form 1040 and reduces your adjusted gross income before other deductions or credits are calculated.8Internal Revenue Service. Penalty on Early Withdrawal of Savings On the $197.26 penalty above, someone in the 24% bracket would recover about $46 in federal taxes.