Finding the best CD rates requires looking beyond the headline APY. A 5.0% CD with a 12-month interest penalty and a $2,500 minimum isn't always better than a 4.7% CD with a 3-month penalty and no minimum.
Here's how to compare CDs like a pro.
Step 1: Compare APY, Not APR
APY (Annual Percentage Yield) includes the effect of compounding. It's the true return you'll earn. APR doesn't include compounding — it always looks lower.
Two CDs can both have a 5.0% APR but different APYs depending on how often interest compounds:
| Compounding | APR | APY |
|---|---|---|
| Annually | 5.00% | 5.000% |
| Quarterly | 5.00% | 5.095% |
| Monthly | 5.00% | 5.116% |
| Daily | 5.00% | 5.127% |
Always compare APY. Our CD Calculator shows you both the APR and effective APY for any compounding frequency.
Step 2: Check the Early Withdrawal Penalty
A slightly lower APY might still be the better deal if the early withdrawal penalty is more lenient.
Typical penalties by CD term:
| CD Term | Common Penalty |
|---|---|
| 3–6 months | 1–3 months of interest |
| 1 year | 3–6 months of interest |
| 2–3 years | 6–12 months of interest |
| 5 years | 6–12 months of interest |
A CD with a 3-month penalty gives you much more flexibility than one with a 12-month penalty. If life throws you a curveball, the penalty matters more than a 0.1% rate difference.
Use our Early Withdrawal Penalty Calculator to see the real cost.
Step 3: Consider the Minimum Deposit
Some banks offer top-tier rates but require $10,000+ to open. Others offer nearly the same rate with $0 minimum.
- If you have $25,000+, you have more options
- If you have under $5,000, focus on banks with low or no minimums
- If you're building a CD ladder, you need enough per rung — a 5-rung ladder on $5,000 means $1,000 per CD
Step 4: Online Banks vs Brick-and-Mortar
Online banks consistently offer higher rates because they have lower overhead (no branches, fewer employees).
- Online banks: Typically 0.5–1.5% higher APY than traditional banks
- Credit unions: Often competitive with online banks, sometimes better
- Traditional banks: Lower rates, but you get in-person service
Unless you specifically need a branch, online banks are almost always the better deal for CDs.
Step 5: Look at the Rate Trend
A 5.0% CD that's been dropping rates may not be as attractive as a 4.8% CD from a bank with stable or rising rates. Check:
- Has the bank been raising or lowering CD rates recently?
- Is the promotional rate temporary (3–6 months then drops)?
- Are the rates from the bank's website, or are they "teaser" rates from aggregator sites?
Step 6: Compare Across Term Lengths
The best rates aren't always at the longest term. Sometimes 1-year CDs pay more than 5-year CDs (an inverted yield curve).
Current strategies based on rate environment:
When long-term rates are higher (normal yield curve):
- Lock in the longest term you can afford
- A 5-year CD ladder maximizes long-term yield
When short-term rates are higher (inverted yield curve):
- Take shorter terms and reinvest as they mature
- 6–12 month CDs may outperform 5-year CDs
When rates are expected to rise:
- Use shorter terms so you can reinvest at higher rates later
- A 6–12 month CD ladder is optimal
Step 7: Build a CD Ladder
Instead of putting all your money in one CD, split it across multiple terms. This way you:
- Earn higher long-term rates on most of your money
- Have a CD maturing every few months for liquidity
- Can reinvest at prevailing rates as each CD matures
See our CD Ladder Calculator to build your own ladder and project earnings over time.
Step 8: Use Our Comparison Tool
We maintain a regularly updated comparison of CD rates from top FDIC-insured banks. You can:
- Sort by APY, rating, or bank name
- Filter by term length (6 months to 5 years)
- Click "Use this rate" to instantly load it into our CD Calculator
Red Flags to Watch For
- Rates that seem too good to be true — some banks offer "promotional" rates that drop dramatically after 3 months
- Non-FDIC-insured products — some banks sell "CDs" that are actually investment products without FDIC protection
- Automatic renewal traps — some banks auto-renew your CD at a lower rate if you don't act before maturity
- Hidden fees — monthly maintenance fees that eat into your interest
Key Takeaways
- Always compare APY, not APR
- Check the early withdrawal penalty — it matters more than a 0.1% rate difference
- Online banks almost always offer better rates than traditional banks
- A CD ladder balances higher yields with regular liquidity
- Watch for inverted yield curves — sometimes shorter terms pay more
Compare current rates on our CD Rates page, then model your returns with our free CD Calculator.