Savings & Banking
CD vs High-Yield Savings Calculator
A CD and a high-yield savings account can pay almost the same rate today. The real difference is what happens next: the CD locks its rate, savings floats with the market. If you expect rate cuts, locking wins; if you expect the money back soon or rates to rise, staying liquid does.
Tested against worked examplesHow we verify
Negative if you expect the Fed to cut. Savings rates follow it; the CD does not.
Months of interest forfeited for breaking the CD early.
The CD comes out ahead: $651
The CD comes out ahead
$651
Once your expected rate change is applied to the savings account.
You expect savings rates to fall, which is exactly when a CD earns its keep — you lock today's rate while the savings account drifts down. The cost is liquidity: break the CD early and you forfeit the penalty shown, so only lock money you are confident you will not need.
- CD value at maturity
- $27,301
- Savings if rates hold
- $27,040
- Savings after the rate change
- $26,650
- CD interest
- $2,301
- Early-withdrawal penalty
- $563
If you break the CD before it matures.
Compare scenariosTry three values of one input
| Amount to deposit | |||
|---|---|---|---|
| The CD comes out ahead | $599 | $651+$52 | $729+$130 |
| CD value at maturity | $25,117 | $27,301+$2,184 | $30,577+$5,460 |
| Savings if rates hold | $24,877 | $27,040+$2,163 | $30,285+$5,408 |
| Savings after the rate change | $24,518 | $26,650+$2,132 | $29,848+$5,330 |
| CD interest | $2,117 | $2,301+$184 | $2,577+$460 |
| Early-withdrawal penalty | $518 | $563+$45 | $630+$113 |
Every other input stays at the value you set above — currently $25,000 for amount to deposit. Differences are measured against the first column.
Saved scenariosSave this calculation
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How this calculator works
Both accounts compound their rate over the term on the principal. The rate-change scenario applies your expected change to the savings rate halfway through the term and compounds the rest at the new rate, while the CD stays fixed throughout. The early-withdrawal penalty is the monthly interest times the months of penalty you set.
Contributions are a one-time deposit — neither account is added to over time. The rate change is modelled as a single step at the midpoint, a simplification of the gradual moves rates actually make. Taxes are not deducted, and both are taxed identically as ordinary income, so the comparison holds before tax.
What this assumes
- The CD rate is locked for its term; the savings rate is variable and assumed constant, which it will not be.
- No early withdrawal from the CD — including the penalty would change the comparison substantially.
- Both are federally insured to the same limits, so the comparison is about access and rate rather than safety.
What changes this number
- Whether rates are rising or falling
- A CD wins when rates fall, because the rate is locked. Savings wins when they rise.
- Whether you might need the money
- The CD's advantage disappears entirely if you break it early.
- The size of the rate gap
- Often small. A locked rate is worth accepting a lower one only when the gap is genuinely narrow.
A worked example
Take the rates expected to fall scenario. These figures are produced by the calculator above, not written alongside it, so they always match what the tool returns.
What you enter
- CD rate
- 4.5%
- Savings APY today
- 4%
- Expected change in savings rate
- -1.5%
What it returns
- The CD comes out ahead
- $651
- CD value at maturity
- $27,301
- Savings if rates hold
- $27,040
- Savings after the rate change
- $26,650
- CD interest
- $2,301
You expect savings rates to fall, which is exactly when a CD earns its keep — you lock today's rate while the savings account drifts down. The cost is liquidity: break the CD early and you forfeit the penalty shown, so only lock money you are confident you will not need.
Try an example
Frequently asked questions
Should I put money in a CD or high-yield savings?
If you might need the money soon or expect rates to rise, keep it in savings — it stays liquid and floats upward. If you can lock it away and expect rates to fall, a CD holds today's rate while savings accounts drift down. The rates themselves are often nearly identical; the difference is the lock.
What is the penalty for breaking a CD early?
Typically three to twelve months of interest, depending on the term. On a 24-month CD, six months is common. It comes out of interest earned, and if you break it very early you can forfeit more interest than you have accrued, dipping into principal. It is the price of the higher, locked rate.
What is a CD ladder?
Splitting money across CDs maturing at staggered intervals — say, every six months — so part of it comes due regularly. You capture CD rates while keeping some access, and each maturing CD can be reinvested at the going rate. See our CD ladder calculator for how to structure one.
Do CD and savings rates move together?
Both follow the Fed, but differently. Savings rates adjust continuously — up when the Fed hikes, down when it cuts. A CD's rate is fixed the day you open it, for its whole term. That is the entire trade: give up the ability to follow rates up in exchange for protection if they fall.
Are CD and savings interest taxed?
Yes, both as ordinary income in the year earned, reported on a 1099-INT. For a CD longer than a year, you owe tax on the interest as it accrues each year, not only at maturity. Neither offers any tax advantage — unlike I bonds or municipal bonds.
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Disclaimer: DayCents provides this calculator for educational purposes only. Results are estimates based on your inputs and the stated assumptions — they are not financial advice, a quote, or an offer of credit. Consult a qualified financial professional before making major money decisions.