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A 6-month interest penalty on a $10,000 CD at 4.50% APY is $225. This CD early withdrawal penalty calculator computes the penalty in dollars, the interest earned so far, your net gain or loss, and your net proceeds if you break the CD now. It also compares keeping the CD to maturity against breaking it and reinvesting the proceeds at a new APY, so you can see whether breaking is worth it.
A 6 months of interest penalty on a $10,000.00 CD at 4.5% APY is $225.00.
Penalty
$225.00
6 months of interest on $10,000.00
Interest Earned So Far
$225.00
6 months at 4.5%
Net Gain / Loss
$0.00
Interest earned minus penalty
Net Proceeds (if you break now)
$10,000.00
$10,000.00 + $225.00 − $225.00
Compare keeping your CD to maturity against breaking now, paying the penalty, and reinvesting the net proceeds at a new APY for the 6 months remaining.
Keep to Maturity
$10,450.00
$10,000.00 + $225.00 earned + $225.00 remaining
Break & Reinvest
$10,250.00
$10,000.00 proceeds + $250.00 at 5%
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A CD early withdrawal penalty calculator converts your bank's penalty schedule into a dollar amount so you can see exactly what breaking your certificate of deposit will cost. Most banks express the penalty as a number of months of simple interest on the principal, using the CD's APY. The calculator above supports the three most common schedules (3, 6, and 12 months of interest) plus a custom days option for banks that use a day count instead.
The conversion matters because penalty schedules sound small in months but add up in dollars. A 6-month interest penalty on a $10,000 CD at 4.50% APY is $225, which wipes out six months of interest. On a $50,000 CD at 5.00% APY with a 12-month penalty, the penalty is $2,500. The calculator shows the penalty alongside the interest you have actually earned, so you can see whether the penalty eats into principal.
All outputs use a simple-interest approximation, which matches how most banks compute the penalty. Penalty policies vary by bank and product, and some banks cap the penalty at accrued interest while others do not. Always confirm the exact terms in your deposit agreement or Truth in Savings disclosure before breaking a CD.
The months-of-interest convention uses simple interest. The formula is penalty = principal × APY × penalty months ÷ 12. For a $10,000 CD at 4.50% APY with a 6-month penalty, the calculation is $10,000 × 0.045 × 6 ÷ 12 = $225.00. For a custom day count, the formula is penalty = principal × APY × days ÷ 365.
Interest earned so far uses the same convention: interest = principal × APY × months held ÷ 12. If you have held a $10,000 CD at 4.50% APY for 6 months, interest earned is $10,000 × 0.045 × 6 ÷ 12 = $225.00. Net gain from breaking now is interest earned minus penalty; net proceeds is principal plus interest earned minus penalty.
Worked Example: $10,000 at 4.50%, 6-Month Penalty, Held 6 of 12 Months
Penalty = $10,000 × 0.045 × 6 ÷ 12 = $225.00. Interest earned = $10,000 × 0.045 × 6 ÷ 12 = $225.00. Net gain = $225.00 − $225.00 = $0.00. Net proceeds = $10,000 + $225.00 − $225.00 = $10,000.00. Every figure is exact to the cent.
The calculator above is an early withdrawal penalty calculator built specifically for certificates of deposit. It is important to distinguish the CD early withdrawal penalty from other early withdrawal penalties in finance. The CD penalty is a bank charge set by your deposit agreement, calculated as months or days of interest. A separate and unrelated penalty is the 10% additional tax the IRS imposes on early distributions from an IRA or 401k taken before age 59 and a half; that is a tax penalty on retirement accounts, not a bank charge on a CD.
A CD held inside an IRA can trigger both: the bank's CD penalty for breaking the term early, and the IRS retirement penalty for taking a distribution from the IRA. A CD held in a taxable account only faces the bank penalty. This page covers only the bank CD penalty and does not provide tax advice. For retirement account questions, consult a tax professional or the IRS rules for your specific situation.
Outside of CDs and retirement accounts, early withdrawal penalties also appear on annuities (surrender charges), life insurance cash value, and some savings accounts with bonus rates. Each product has its own penalty structure, so use a calculator built for the specific product rather than generalizing.
The penalty for cashing a CD early depends on your principal, your APY, and your bank's penalty schedule. On a $10,000 CD at 4.50% APY, the three most common penalties are $112.50 for 3 months of interest, $225.00 for 6 months, and $450.00for 12 months. Each is computed as $10,000 × 0.045 × penalty months ÷ 12.
Typical Penalties on a $10,000 CD at 4.50% APY
3 months: $112.50. 6 months: $225.00. 12 months: $450.00. Custom 90 days:$110.96 ($10,000 × 0.045 × 90 ÷ 365).
These are dollar penalties, not reductions in your interest rate. The bank deducts the penalty from your accrued interest first, and if the penalty exceeds accrued interest, some banks then deduct the difference from principal while others cap the penalty at interest earned. The calculator above flags the case where the penalty exceeds interest earned so you know to check your bank's policy.
The CD penalty calculator above uses a simple-interest approximation, which matches how most direct banks compute the early withdrawal penalty. The penalty terms are set by your bank and disclosed in two documents you received when you opened the CD: the deposit agreement and the Truth in Savings disclosure. These documents specify the penalty schedule (months or days of interest), whether the penalty is capped at accrued interest, and any special rules for no-penalty or bump-up CDs.
Penalty schedules vary by term and by bank. A typical schedule is 3 months of interest for CDs with terms under 1 year, 6 months for terms of 1 to 2 years, and 12 months for terms over 2 years. Some banks charge more, some less, and a few offer no-penalty CDs that waive the early withdrawal fee entirely in exchange for a lower APY. Brokered CDs, sold through brokerage accounts, do not use a months-of-interest penalty; instead you sell them on the secondary market, where the price moves with prevailing rates.
When comparison shopping for CDs, the penalty schedule matters as much as the APY. A CD with a slightly higher APY but a 12-month penalty can cost more than a lower-APY CD with a 6-month penalty if you end up breaking it. Read the Truth in Savings disclosure before opening any CD, and use the calculator above to model the worst-case penalty for the principal and APY you are considering.
Whether breaking a CD is worth it depends on the penalty, the remaining term, and the new rate available elsewhere. The calculator above runs the comparison automatically using the same simple-interest math. To decide, compare two end values: the value of keeping the CD to maturity, and the value of breaking it now, paying the penalty, and reinvesting the net proceeds at the new APY for the same remaining months.
Worked Example: $10,000 at 3.00% APY, 12 Months Remaining, 6-Month Penalty, New CD at 5.00%
Penalty = $10,000 × 0.03 × 6 ÷ 12 = $150.00. Interest earned so far (0 months held) = $0.00. Net proceeds after breaking = $10,000 + $0.00 − $150.00 = $9,850.00.
Keep to maturity: remaining interest = $10,000 × 0.03 × 12 ÷ 12 = $300.00. Final value = $10,000 + $0.00 + $300.00 = $10,300.00.
Break and reinvest: reinvest $9,850.00 at 5.00% for 12 months = $9,850.00 × 0.05 × 12 ÷ 12 = $492.50 in new interest. Final value = $9,850.00 + $492.50 = $10,342.50.
Difference = $10,342.50 − $10,300.00 = $42.50. Breaking the CD and reinvesting at the higher rate wins by $42.50, because the extra 2.00% of yield on $9,850 over 12 months ($197.00) exceeds the $150.00 penalty.
The break-even point depends on how the new rate compares to the current rate, the size of the penalty, and the length of the remaining term. A larger rate gap, a smaller penalty, and a longer remaining term all favor breaking. A smaller gap, a larger penalty, and a shorter remaining term all favor keeping the CD. Use the calculator above with your own numbers to see which option wins and by how much.
One caveat: the calculator assumes you can actually reinvest the net proceeds at the new APY for the full remaining term. If the new rate is a promotional rate that drops after a few months, or if rates fall before you lock in the new CD, the break option may underperform the calculation. The comparison is a point-in-time estimate based on the rates you enter.
Browse all tools on the Savings Calculators hub. If you are weighing guaranteed income from an annuity against CD interest, the Annuity Payout Calculator estimates monthly and annual payouts for life and fixed-period annuities. If breaking a CD frees up cash to pay down high-rate debt, the Debt Payoff Calculator compares snowball and avalanche strategies and shows your debt-free date, so you can see whether the interest saved on debt beats the interest lost on the CD penalty.