Banking
What Is a Certificate of Deposit and How Does It Work?
Two people each put $10,000 away for five years. Both pick a safe, insured account that pays a fixed rate. Three years in, both need the money back. One pays $164 to get it. The other pays $400. Same amount, same rate, same decision to leave early. The only difference is which institution they signed with, and neither of them read that part.
That is a certificate of deposit, usually shortened to a CD. It is one of the plainest products in banking: you agree to leave a fixed sum untouched for a fixed period, and in return the bank promises a fixed rate that will not move while you are in it. No market risk, no surprises on the way up or down.
The catch is the exit. Almost every guide tells you there is a penalty for leaving early. Very few tell you what it actually costs, and none of them compare it across institutions, which is where the real money hides. This guide covers the ordinary mechanics in plain English, and then puts a dollar figure on the part everyone skips.
1. What Is a Certificate of Deposit?
A certificate of deposit is a savings product with a deadline. You hand the bank a lump sum, the bank tells you the exact rate it will pay, and you both agree on a date when you get the money back with the interest added. Until that date arrives, the money is supposed to stay put.
Banks call it a time deposit, which is a more honest name. You are selling the bank certainty. It knows your money will sit there for the full term, so it can lend that money out with confidence, and it pays you a better rate than an ordinary savings account for the privilege.
The features that define one:
- Fixed rate. The rate is locked the day you fund the account. If the market drops next month, yours does not.
- Fixed term. Anything from one month to ten years, chosen up front.
- A lump sum, once. Most do not let you add money later.
- A penalty for leaving early. This is the trade for the better rate, and it is the part this guide spends the most time on.
- Federal insurance. Up to $250,000 per depositor, per institution, per ownership category. Our guide to US savings bonds covers a differently structured government-backed option, with no coverage cap at all since it is a direct Treasury obligation rather than deposit insurance.
At a credit union the same product is usually called a share certificate, and what you earn is called a dividend rather than interest. The mechanics are identical.
2. How Does a Certificate of Deposit Work?
The whole life of the account has four moments, and nothing much happens between them.
- You open and fund it. You pick a term, deposit the money, and the rate locks. Many banks give you a short window, often ten days, in which you still get a better rate if their published rate rises.
- Interest accrues. Most institutions calculate interest daily and add it to the balance monthly, so you earn interest on your interest.
- The term runs out. This date is called maturity.
- You decide. Take the money, or let it roll into a new term. If you do nothing, most banks roll it automatically. Section 10 explains why that matters more than it sounds.
One point that surprises people: at most institutions you can withdraw the interest whenever you like without any penalty. It is only the original deposit, the principal, that is locked. If you want a small income stream rather than a lump at the end, ask for monthly interest payouts. You give up some compounding, but you keep access to what you have earned.
3. Certificate of Deposit Terms and Minimum Deposits
Two numbers decide whether an account is even open to you: how long you must commit, and how much you must bring.
Terms usually run from three months to five years, with a handful of institutions going out to ten. A short term certificate of deposit, such as a 6 month certificate of deposit, keeps your options open, while a high yield certificate of deposit is simply one paying a competitive rate rather than a separate product. Minimums vary far more than most people expect, and this is where online banks and branch banks separate:
| Institution | Minimum to open | Terms offered |
|---|---|---|
| Ally | $0 | 3 to 60 months |
| Synchrony | $0 | 3 to 60 months |
| Capital One 360 | $0 | 6 to 60 months |
| Marcus | $500 | 6 months to 6 years |
| Alliant Credit Union | $1,000 | 12 to 60 months |
| Bank of America | $1,000 | 28 days to 10 years |
| Chase | $1,000 | 1 to 120 months |
| Navy Federal | $1,000 | 3 months to 7 years |
| Wells Fargo | $2,500 | 3 to 12 months |
Minimums and terms read from each institution's own published pages, 25 July 2026. These are set by the institution and change without notice.
The pattern is worth naming. The banks with branches on the high street ask for $1,000 to $2,500 and pay the least. The online-only institutions ask for nothing and pay the most, because they have no branches to fund. If you are choosing between them, the same logic applies as it does to online savings accounts.
4. Interest Rate vs APY: What You Actually Earn
Every advertisement shows two numbers and most readers assume they are the same thing. They are not.
- Interest rate is the plain rate the bank applies to your balance.
- Annual percentage yield, or APY, is what you actually end up with after compounding is counted. It is always the slightly larger number, and it is the one to compare.
A worked figure makes the gap concrete. Put $10,000 into a one-year account at a 3.94% interest rate compounded daily. Simple interest would be $394. Because each day's interest starts earning its own interest, you finish with about $402, which is a 4.02% APY.
Federal rules require the APY to be disclosed, which is why every institution shows it. When you compare two offers, compare APY to APY. Comparing one bank's interest rate against another's APY will quietly mislead you every time.
5. Types of Certificates of Deposit
The plain version is called a traditional or fixed-rate certificate. Everything else is a variation that trades some of the rate away for some kind of flexibility. A no penalty certificate of deposit drops the exit fee, an IRA certificate of deposit sits inside a retirement account, and jumbo certificates of deposit ask for a much larger balance in exchange for a rate premium that is often smaller than you would expect. An IRA is an individual retirement account, a tax-advantaged account you open yourself to save for retirement.
| Type | What it changes | The trade |
|---|---|---|
| Traditional | Nothing. Fixed rate, fixed term. | Best rate, least flexibility. |
| No-penalty | Withdraw the full balance after about a week, penalty free. | Lower rate; usually all or nothing, no partial withdrawals. |
| Bump-up | You may request one rate increase during the term. | Starts lower; you must remember to ask. |
| Step-up | The rate rises on a published schedule. | The average across the term is often unremarkable. |
| IRA | Held inside a retirement account, so growth is tax-advantaged. | Retirement withdrawal rules apply on top of the bank's penalty. |
| Jumbo | Large deposit, often $100,000 or more. | The rate premium is frequently tiny or absent. |
| Brokered | Bought through a brokerage, sellable on a secondary market. | No bank penalty, but you can sell at a loss if rates rose. |
| Callable | The bank may end it early. | Higher headline rate; the bank calls it when rates fall, which is exactly when you least want it back. |
5.1 The two that catch people out
- Callable certificates look like the best rate on the page. The catch is that the option belongs to the bank, not to you. If rates fall, the bank hands your money back and you reinvest at the new lower rate. If rates rise, you stay locked in. You lose in both directions, which is why the headline rate has to be higher.
- Brokered certificates have no early withdrawal penalty at all, which sounds like a pure win. Instead you sell your certificate to another investor at whatever price the market gives you. If rates have risen since you bought, nobody wants your older, lower-paying certificate at face value, so you sell below what you paid. The penalty has not disappeared; it has changed shape.
6. What Early Withdrawal Actually Costs: A Bank-by-Bank Comparison
The certificate of deposit early withdrawal penalty is the part that every other guide summarises in one sentence and moves past. Almost all of them say the same thing: leaving early triggers a penalty, and you might lose some interest. Neither claim is wrong. Neither is useful, because the penalty is not one number. It is set by each institution, it changes with the length of the term, and the spread between the cheapest and the dearest is far wider than most savers imagine.
Federal rules set only a floor: a minimum of seven days' simple interest if you pull money out within the first six days. There is no ceiling. Everything above that floor is the institution's own choice.
These schedules were read from each institution's own disclosure pages on 25 July 2026.
| Institution | Type | Penalty by term | Can it touch your deposit? |
|---|---|---|---|
| Chase | Big bank | Under 6 mo: 90 days' interest. 6 to under 24 mo: 180 days. 24 mo and over: 365 days. | No, capped at interest earned |
| Wells Fargo | Big bank | Under 3 mo: 1 month. 3 to 12 mo: 3 months. Over 12 to 24 mo: 6 months. Over 24 mo: 12 months. | Yes |
| Bank of America | Big bank | Under 90 days: interest earned or 7 days, whichever is greater. 90 days to 12 mo: 90 days. 12 to 60 mo: 180 days. 60 mo and over: 365 days. | Yes |
| Ally | Online | Under 3 mo: 30 days. 3 to 24 mo: 60 days. 25 to 36 mo: 90 days. 37 to 48 mo: 120 days. 49 mo and over: 150 days. | Yes |
| Marcus | Online | Up to 1 yr: 90 days. Over 1 to 5 yr: 180 days. Over 5 yr: 270 days. | Yes |
| Synchrony | Online | Up to 12 mo: 90 days. Over 12 to under 48 mo: 180 days. 48 mo and over: 365 days. | Yes |
| Capital One 360 | Online | Up to 12 mo: 3 months. Over 12 mo: 6 months. | Yes |
| Navy Federal | Credit union | Up to 1 yr: lesser of 90 days' dividends or dividends earned. Over 1 yr: 180 days. 5 yr and over: 365 days. | No, capped at dividends earned |
| Alliant | Credit union | Up to 17 mo: days open, up to 90. 18 to 23 mo: up to 120. 24 to 60 mo: up to 180. | No, capped at days held |
6.1 The same decision, in dollars
Days of interest is an abstraction. Here is what those schedules cost on a $10,000 deposit paying 4.00%, where one day of interest is $1.10.
| Institution | Cost of leaving a 1-year certificate early | Cost of leaving a 5-year certificate early |
|---|---|---|
| Ally | $65.75 | $164.38 |
| Marcus | $98.63 | $197.26 |
| Alliant | $98.63 | $197.26 |
| Synchrony | $98.63 | $400.00 |
| Navy Federal | $98.63 | $400.00 |
| Capital One 360 | $100.00 | $200.00 |
| Wells Fargo | $100.00 | $400.00 |
| Chase | $197.26 | $400.00 |
| Bank of America | $197.26 | $400.00 |
On the one-year account the gap runs from $65.75 to $197.26, a threefold difference. On the five-year account it runs from $164.38 to $400.00. Identical money, identical rate, identical change of plan, and the outcome is set entirely by a clause nobody reads before signing.
6.2 The finding that reverses the usual advice
Look again at the last column of the first table. Only three of these nine institutions cap the penalty at the interest you have actually earned: Chase, Navy Federal and Alliant. At those three, the worst case is that you walk away with exactly what you put in. Your deposit cannot be reduced.
At the other six, including every online bank on the list, the penalty is calculated first and taken from your interest second. If you have not earned enough interest to cover it, the difference comes out of your deposit. Withdraw early enough and you genuinely get back less than you paid in.
This cuts directly against the standard advice, which is to head for the online banks because their rates are better. Their rates are better. But Chase, which pays some of the least attractive rates in American banking, has the more protective penalty structure of the two. Whether that trade is worth it depends entirely on how confident you are that the money will stay put.
One more reason to read the institution's own page rather than a comparison site: several large rate-comparison sites currently publish Marcus's penalty as 270 days for mid-length terms. Marcus's own disclosure says 180. When those disagree, the institution's disclosure is the one that governs your account.
6.3 Estimate your own early withdrawal cost
The table above uses $10,000 at 4.00%. Your numbers will differ, so this calculator applies the same published schedules to whatever you enter. It is an estimate for planning, not a quote.
Applies each institution's published schedule, using simple daily interest on the deposit. Real accounts compound, and some institutions calculate the penalty on the amount withdrawn rather than the whole balance, so treat this as a planning estimate. Schedules read 12 August 2026 and set by the institution.
7. The Break-Even: When Locking Up Beats Staying Liquid
The penalty is only half the question. The other half is what you gave up by not keeping the money somewhere you could reach it. A certificate has to out-earn a liquid high-yield savings account by enough to cover its own exit cost, or locking up was never worth it in the first place.
Take $10,000. A one-year certificate at 4.00% pays about $400. A high-yield savings account paying 3.50% pays about $350 over the same year but stays reachable. The certificate is ahead by roughly $50 for the full year.
Now suppose you leave after six months. This is where the numbers turn:
| Institution | Interest earned in 6 months | Penalty | You keep | Savings account would have paid |
|---|---|---|---|---|
| Ally (60 days) | $200 | $65.75 | $134.25 | $175 |
| Marcus (90 days) | $200 | $98.63 | $101.37 | $175 |
| Chase (180 days) | $200 | $197.26 | $2.74 | $175 |
Read the last two columns together. In every one of these cases, breaking the certificate at six months leaves you worse off than if you had simply used a savings account and kept full access the whole time. At Chase you finish the six months with $2.74 to show for tying up $10,000.
The rule of thumb this produces is short: a certificate only pays if you hold it to maturity. The rate advantage over a liquid account is usually a fraction of a percent, and a single early exit erases several months of that advantage in one stroke. If there is a realistic chance you will need the money, the honest certificate of deposit vs savings account comparison is not the obvious one. It is certificate-broken-early versus savings account, and the savings account wins that one nearly every time. If liquidity matters more than the last half percent, how a high-yield savings account works is the more sensible home for the money.
8. Is Your Money Safe? FDIC and NCUA Coverage
This is the least complicated part of the product. Certificates at an insured bank are covered by the Federal Deposit Insurance Corporation, and share certificates at an insured credit union are covered by the National Credit Union Administration. Both protect up to $250,000 per depositor, per institution, per ownership category. You can read the exact rules on FDIC deposit insurance limits and on NCUA share insurance for credit unions.
Two things people get wrong:
- The limit is per institution, not per account. Four certificates of $100,000 each at the same bank are not four separate $250,000 protections. They are $400,000 at one bank, of which $150,000 sits outside the guarantee.
- Bank mergers can quietly halve your coverage. When two insured banks combine, accounts you held at each are eventually treated as one. Anyone holding $200,000 at each of two banks that later merged went from fully covered to $150,000 uninsured without moving a dollar. Deposits opened at Discover and Capital One from 18 May 2025 onward now share a single limit for exactly this reason.
If you are weighing a bank against a credit union, the protection is equivalent in substance; how FDIC and NCUA insurance compare sets out the differences that do exist.
9. A Real Example: Priya's $10,000 Decision
Priya has $10,000 saved for a house deposit she expects to need in about two years. She wants it safe and she wants it earning. She is choosing between a five-year certificate at 4.15%, a one-year certificate at 4.00%, and a high-yield savings account at 3.50%.
The five-year account pays the most, so it looks like the obvious answer. Here is what each path actually delivers at the moment she needs the money, at the two-year mark.
| Choice | Interest earned by year 2 | Penalty to get the money | Priya ends with |
|---|---|---|---|
| 5-year certificate at 4.15%, broken at year 2 | $847 | $400 (365 days) | $10,447 |
| 1-year certificate at 4.00%, renewed once | $816 | $0, held to maturity | $10,816 |
| High-yield savings at 3.50% | $712 | $0, always accessible | $10,712 |
The highest rate on the page finishes last. The five-year certificate earned the most interest and still delivered the smallest balance, because one year of interest went straight back to the bank the moment she needed her own money.
The one-year certificate, renewed once, wins by $369 over the five-year choice and by $104 over the savings account. It wins for a reason that has nothing to do with rate: it was the only option whose term matched when she actually needed the money. Matching the term to the goal did more for Priya's return than chasing the highest number.
10. What Happens When a Certificate of Deposit Matures
Maturity is the day the term ends, and it is the one date worth putting in your calendar. What follows is a short window called the grace period, and it is the only time you can move the money without any penalty at all.
Grace periods are not standard, and nobody advertises the difference:
- Navy Federal: 21 days. By some distance the most generous on this list.
- Most banks, including Chase, Ally, Marcus and Synchrony: 10 days.
- Alliant: 7 days on new certificates.
Inside that window you can take the money, change the term, add to it, or close it. Miss it and most institutions roll your balance into a brand new term of the same length, at whatever rate they happen to be offering that day. That is the auto-renewal trap: a saver who was earning a competitive rate can find themselves locked into a fresh multi-year term at a far worse one, and the only way out is now the early withdrawal penalty they were trying to avoid.
Most institutions send a maturity notice ahead of the date. Treat it as an action item, not a receipt. The IRS is the Internal Revenue Service, the federal agency that collects taxes and writes the rules on what is taxable.
11. How Certificate of Deposit Interest Is Taxed
Interest from a certificate is ordinary taxable income at the federal level, taxed at your normal income tax rate rather than the lower rates that apply to long-term investment gains. The IRS Topic 403 on taxable interest income sets out the general rules.
- You owe tax in the year the interest is credited, not the year you finally withdraw it. On a multi-year certificate that means paying tax on money you cannot yet touch.
- You will receive a Form 1099-INT if you earned $10 or more in interest. Below that threshold no form is issued, but the income is still reportable.
- An early withdrawal penalty is generally deductible. It appears in its own box on the 1099-INT and can reduce your taxable income even if you do not itemise, which softens the blow of breaking a certificate.
- An IRA certificate is different. Growth is tax-deferred or tax-free depending on the account type, but retirement withdrawal rules apply on top of anything the bank charges.
Tax treatment depends on your own situation, so confirm the details with a qualified tax professional before acting.
12. Certificates of Deposit and the Rate Environment: Past, Present, Outlook
Certificate rates do not move on their own. They track what the Federal Reserve does with short-term rates, with a lag of a few weeks.
- The recent past. Through 2020 and 2021, with the federal funds rate near zero, one-year certificates commonly paid well under 1%. They were, for most savers, not worth the paperwork.
- What changed. The Fed's tightening cycle from 2022 through 2024 lifted short-term rates sharply, and deposit rates followed. Certificates went from an afterthought to one of the more attractive low-risk options available.
- Today. The federal funds target sits at roughly 3.50% to 3.75%, and competitive one-year certificates cluster near 4%, both confirmed current as of August 2026. Rates have eased from their peak but remain far above the levels of the early 2020s.
- The outlook. Informed observers generally expect only modest further easing rather than a return to near-zero. That is an expectation, not a forecast, and the Fed adjusts its position several times a year.
The practical consequence: when rates are expected to fall, locking a longer term looks more attractive because you keep today's rate. When they are expected to rise, shorter terms and a ladder keep you flexible. Nobody predicts these turns reliably, which is the argument for matching the term to your own timeline rather than to a rate forecast.
13. How to Choose and Open One
The decision breaks into five questions, and only one of them is about the rate.
- When do you need the money? Answer this first and let it set the term. Priya's example in section 9 shows what happens when it is answered last.
- What is the early withdrawal penalty, exactly? Find the schedule before you sign, and check whether it is capped at interest earned. That single clause is the difference between a bad outcome and a loss of deposit.
- How long is the grace period? Anything from 7 to 21 days, and it determines how much room you have at maturity.
- Is it insured, and are you under the limit at that institution?
- Then compare APY to APY. Rate is the last filter, not the first.
13.1 Building a certificate of deposit ladder
A CD ladder is the standard answer to the liquidity problem. Rather than putting $10,000 into one five-year certificate, you split it into five $2,000 certificates maturing one year apart. From year two onward something matures every twelve months. You get most of the rate advantage of longer terms while always having money coming free within a year, and you never have to pay a penalty to reach it.
The cost is a little admin: five accounts, five maturity dates, five grace periods to watch. For anyone whose main worry is being locked in at the wrong moment, that is a fair trade. The CFPB is the Consumer Financial Protection Bureau, the federal agency that writes and enforces the rules banks and lenders have to follow.
Opening one takes about ten minutes online. You will need identification, a funding source, and a decision on the term. If you are still weighing whether this money belongs in a locked account at all, the difference between checking and savings accounts is the place to start, and CFPB guidance on choosing a deposit account covers what to check on any deposit account before you open it.
Frequently Asked Questions
Final Thoughts
A certificate of deposit is a simple trade: you give up access for a while, and you get certainty and a slightly better rate in return. For money with a known date attached, a house deposit two years out, a tax bill next spring, that trade is often a good one.
What the research in section 6 shows is that the interesting variable is not the rate. It is the exit. Institutions paying almost identical rates charge two and three times as much to let you leave, and only a minority protect your deposit while doing it. That clause is one paragraph in a disclosure most savers never open, and it can matter more than the entire rate difference you spent an afternoon comparing.
So pick the term by when you actually need the money, read the penalty schedule before you sign, and put the maturity date in your calendar. Do those three things and the rest of the product looks after itself.
This article is for general information only and is not financial or tax advice. Certificate of deposit rates (APYs), minimum deposits, early withdrawal penalties and grace periods are set by each bank or credit union and change without notice, so confirm current terms directly with the institution before you open an account. Penalty schedules and minimums quoted here were read from each institution's own published pages on 25 July 2026. The dollar figures are illustrative calculations, not quotes. Always confirm an account is FDIC or NCUA insured before you deposit money. Read our full Disclaimer.