The main difference between a CD and a high-yield savings account is the trade-off between a guaranteed rate and access. A CD usually locks in a fixed rate for a set term, such as 12 months, but charges a penalty for early withdrawals. A high-yield savings account pays a variable rate and lets you withdraw money at any time.
Both are deposit accounts, and both are FDIC-insured up to $250,000 per depositor, per FDIC-insured bank, for each ownership category when held at an insured bank.
How do CDs and high-yield savings accounts compare?
| Feature | Certificate of deposit (CD) | High-yield savings account |
|---|---|---|
| Interest rate | Usually fixed for the term | Variable; can change after opening |
| Access to money | Locked until maturity | Withdraw any time (bank limits may apply) |
| Early withdrawal | Penalty, as disclosed by the bank | No penalty |
| Adding money | Usually not allowed after opening | Deposit any time |
| Terms | Commonly a few months to several years | No term |
| FDIC/NCUA insurance | Yes, up to $250,000 per category | Yes, up to $250,000 per category |
| Best for | Money with a known date of need | Emergency funds and flexible savings |
The CFPB describes a CD as a type of savings account where you generally agree not to withdraw money for a specified length of time. It recommends comparing the term, the interest rate and the early withdrawal penalty when shopping.
What is the difference between APY and APR?
Under the federal Truth in Savings rules (Regulation DD), banks quote two numbers for deposit accounts:
- Interest rate: the annual rate paid on the account, which does not reflect compounding.
- Annual percentage yield (APY): the total interest paid over a 365-day period, including the effect of compounding.
APY is the better number for comparisons because it puts accounts with different compounding schedules on the same footing. For example, an interest rate of 3.93% compounded daily works out to an APY of about 4.00%.
APR (annual percentage rate) is a borrowing term used for loans and credit cards. On savings products, look for APY.
How do early withdrawal penalties work?
Taking money out of a CD before it matures usually costs a penalty. There is no single standard amount. Banks set their own penalties, and Regulation DD requires them to disclose that a penalty may be imposed, how it is calculated and when it applies. Penalties are often stated as a number of days' or months' interest, with longer CDs typically carrying larger penalties.
Regulation DD's definition of a time account also sets a floor for the first week: withdrawals within six days of opening are generally either not allowed or subject to a penalty of at least seven days' interest.
A penalty can be larger than the interest earned so far, especially early in the term. In that case, the penalty can come out of principal.
Are CDs and high-yield savings accounts FDIC-insured?
Yes, when held at an FDIC-insured bank. The FDIC lists savings accounts, money market deposit accounts and time deposits such as CDs among covered deposits. The standard coverage amount is $250,000 per depositor, per FDIC-insured bank, for each account ownership category.
Accounts at federally insured credit unions are covered up to $250,000 by the NCUA. Stocks, bonds, mutual funds, annuities, Treasury securities and crypto assets are not FDIC-insured, even when bought through a bank.
Someone with more than $250,000 in cash can extend coverage by using different ownership categories (such as individual and joint accounts) or by spreading deposits across separate banks.
Worked example: which earns more?
The rates below are example rates for illustration only, not current offers. Actual rates change frequently.
Assume $20,000 deposited for 12 months:
- 12-month CD at 4.00% APY, fixed
- High-yield savings at 3.50% APY at the start
Scenario 1: savings rate stays the same
- CD: $20,000 × 4.00% = $800
- Savings: $20,000 × 3.50% = $700
The CD earns $100 more.
Scenario 2: savings rate drops halfway through
High-yield savings accounts typically pay a variable rate, so the bank can lower it. If the savings APY falls from 3.50% to 3.00% after six months:
- Savings: $20,000 × (1.035^0.5 × 1.030^0.5 − 1) ≈ $650
- CD: still $800
The fixed rate is worth about $150 here.
Scenario 3: the money is needed after nine months
Suppose the CD has a penalty of three months' interest and the money is withdrawn after nine months.
- CD interest earned: $20,000 × (1.04^0.75 − 1) ≈ $597
- Penalty: about $200 (three months' interest)
- CD net: roughly $400
- Savings (rate unchanged): $20,000 × (1.035^0.75 − 1) ≈ $523, with no penalty
Here the savings account comes out about $120 ahead. The CD wins only if the money stays in until maturity.
When does a CD make more sense?
- The money has a known date of use, such as a home down payment or tuition bill in 12 months.
- Rates are expected to fall and you want to lock in today's rate.
- You want to avoid the temptation to spend the savings.
When does a high-yield savings account make more sense?
- It is an emergency fund that may be needed at short notice.
- You plan to add money regularly.
- The timing of the expense is uncertain.
- The gap between CD and savings rates is small, so the lock-up is not worth much.
What is a CD ladder?
A CD ladder spreads money across several CDs that mature at different times. It combines higher fixed rates on longer terms with regular access to part of the money.
Example with $20,000:
| CD | Amount | Term |
|---|---|---|
| 1 | $5,000 | 1 year |
| 2 | $5,000 | 2 years |
| 3 | $5,000 | 3 years |
| 4 | $5,000 | 4 years |
Each year, one CD matures. You can spend that $5,000 or reinvest it in a new 4-year CD. After the first few years, every rung is a 4-year CD, yet one matures every year.
Before setting up a ladder, check whether each CD renews automatically at maturity. Banks must disclose this and state whether there is a grace period, and how long it lasts, to withdraw without penalty after renewal.
Can you use both?
Many savers do. A common setup keeps an emergency fund in a high-yield savings account and places money earmarked for a specific future date in CDs or a CD ladder. The split depends on how much access you need and how much rate certainty you want.
This guide is for education only and is not financial advice.