CD rates remain well above historical averages — even after easing from the 2023 peak. Before you lock in your money, here's how to run the math and make sure you're getting the best deal.
Certificate of Deposit (CD) rates surged to multi-decade highs following the Federal Reserve's aggressive rate hike cycle. While they've eased from the 2023 peak, top rates from online banks and credit unions still sit well above historical norms — and the gap between a mediocre rate and the best available can still mean hundreds or thousands of dollars over a multi-year term.
This guide shows you exactly how to calculate what you'll earn on any CD, what to look for when comparing rates, and how to use a CD calculator to verify bank claims before signing anything.
The national average CD rate across all banks sits well below the rates offered by online banks and credit unions. The spread is significant:
| CD Term | National Average APY | Top Online Bank APY |
|---|---|---|
| 3-Month | ~1.6% | 3.50–3.80% |
| 6-Month | ~1.8% | 3.80–4.15% |
| 12-Month | ~1.8% | 4.00–4.20% BEST |
| 24-Month | ~1.5% | 3.80–4.10% |
| 60-Month | ~1.3% | 3.50–3.90% |
💡 Key takeaway: The average bank pays roughly 2–3x less than the best available rate. On a $50,000 deposit over 12 months, that's the difference between earning ~$900 vs. ~$2,100.
When comparing CDs, always look at the APY (Annual Percentage Yield), not the APR. APY accounts for compounding — the fact that interest earned is added to your principal and earns more interest over time.
Banks are legally required to advertise APY for savings products, but it helps to understand what's underneath the number:
The difference is small on short terms but compounds meaningfully on multi-year CDs. Use our APY calculator to convert any rate instantly.
Not sure if a CD's APY adds up? Verify the math before you lock in.
💵 Run the Numbers with Our CD CalculatorThe formula for CD growth is the same as compound interest:
A = P × (1 + r/n)nt
Where:
Using monthly compounding:
Versus the national average at ~1.8% APY: $25,000 × (1.018) = $25,450 — just $450 in interest. The top-rate CD earns more than 2x more.
A CD ladder splits your deposit across multiple terms — for example, $20,000 split into four $5,000 CDs with 6-month, 12-month, 18-month, and 24-month terms. As each CD matures, you reinvest at whatever the current best rate is.
Benefits:
Planning a CD ladder around a savings target? Use our savings goal calculator to decide how much to allocate to each rung.
Online banks and credit unions consistently beat traditional banks on CD rates because their lower overhead translates to higher yields for depositors. Places to check:
✅ Pro tip: After finding a rate you like, plug the numbers into a CD calculator before opening the account. Verify that the advertised APY matches the actual maturity value for your deposit amount and term.
With high-yield savings accounts (HYSAs) also paying competitive rates, the CD vs. HYSA question is worth considering:
| Feature | CD | High-Yield Savings |
|---|---|---|
| Rate | Fixed for the term | Variable (can drop) |
| Access | Locked (penalties apply) | Withdraw anytime |
| Best for | Money you won't need | Emergency funds |
| Rate lock | Yes | No |
If you believe rates will fall, locking in a multi-year CD now protects your yield. If rates rise, a shorter-term CD or HYSA gives you flexibility to capture higher rates sooner.
Ready to calculate exactly what your CD will be worth at maturity?
💵 Use the Free CD CalculatorEven off their peak, CD rates in 2026 remain meaningfully above long-term historical averages — a solid window for risk-averse savers. The keys: shop beyond your primary bank, understand APY vs. APR, verify the math before committing, and consider a ladder strategy if you need periodic liquidity. A few hours of rate shopping on a $50,000 deposit can realistically mean $2,000–$2,500 more in your pocket over a 2-year period.