A certificate of deposit trades access for yield. You agree not to touch the money for a fixed term and the bank pays more than it would on an instant access account.
Breaking that agreement has a price, and the way it is quoted hides how large it can be.
The penalty is counted in months
An early withdrawal penalty is almost always expressed as a number of months of interest. Typical terms:
| Certificate term | Common penalty |
|---|---|
| Under 12 months | 3 months of interest |
| 1 to 3 years | 6 months of interest |
| 4 years or more | 12 months of interest |
Those are conventions, and they vary widely between banks. The figure that applies to you is in the disclosure you received when the account was opened.
Notice what the quote does not reference: how much interest you have actually earned.
Why it can exceed the gain
Take $10,000 in a 5-year certificate at 4.00% APY, with a penalty of 12 months of interest, broken after 4 months.
Interest earned in four months, at roughly a third of a year:
10,000 x 0.04 x (4 / 12) = $133.33
Penalty, twelve months of interest:
10,000 x 0.04 = $400.00
The penalty is three times what the certificate has earned. The first $133.33 comes out of the interest and the remaining $266.67 comes out of your $10,000.
You withdraw about $9,733, having deposited $10,000 four months earlier.
That is not a bank behaving badly. It is the stated term of the product, and most disclosures say plainly that the penalty may reduce principal. It is simply not what “penalty” sounds like.
When the same break costs almost nothing
Run the identical certificate to month 48 and break it one year early.
Interest earned over four years is several thousand dollars. The penalty is still twelve months of interest, about $400, now a small fraction of the gain. You keep the rest.
The penalty is a fixed quantity of interest, so its weight falls as the certificate matures. Early is expensive, late is not, and the quoted number never changes.
What our calculator does and does not do
Our CD calculator projects the balance at maturity from the rate, the term and the compounding frequency. It does not model early withdrawal, for a specific reason. Each bank sets its own penalty, so it is a term of your account, and any figure we produced would be a guess dressed as a calculation.
What it will tell you is the interest accrued to a given point, which is the number the penalty is measured against. Compare that against the months of interest in your disclosure and you have the real answer for your account.
Where to check
Deposit account terms, including how a penalty is disclosed, fall under the Truth in Savings Act and Regulation DD. The yield itself is calculated per Appendix A to Part 1030, which is why APY is comparable between banks even when penalties are not.
The deposit itself is insured within limits regardless of any penalty. The Federal Deposit Insurance Corporation sets out the coverage on its deposit insurance pages.
The structural alternative
If the reason you might break a certificate is that you cannot predict when you will need the money, a CD ladder addresses it directly. Splitting the deposit across staggered maturities means something is always coming due soon, so an unexpected need usually meets a maturing rung rather than a penalty.
A ladder yields slightly less than putting everything in the longest term. That difference is the price of not being forced into the arithmetic above.
Questions
- Can a penalty be bigger than the interest I earned?
- Yes, and this is the detail that catches people. The penalty is defined as a number of months of interest, not as a share of what accrued. Break a five-year certificate after four months when the penalty is twelve months of interest, and the shortfall comes out of your principal. Many banks disclose exactly that in the account terms.
- Is the penalty set by law?
- Federal rules set a minimum penalty in some cases, but the amount is mostly the bank's own term, which is why it varies so much between institutions. It is in the account disclosure you received when you opened the certificate, and it is worth reading before you need it.
- Does a no-penalty CD solve this?
- It removes the penalty and usually pays a lower rate in exchange, so you are buying flexibility with yield. Whether that trade is worth it depends on how likely you are to need the money, which is not something a calculator can judge.
- What is a CD ladder for?
- It is the structural answer to the same problem. Splitting a deposit across certificates maturing at different dates means something is always close to maturing, so an unexpected need rarely requires breaking one early.