Compare fixed returns against variable rates to find the best home for your cash.
Should you lock your money in a CD or keep it liquid in a high-yield savings account (HYSA)? This tool helps you visualize the potential earnings difference based on your expected rates. Pull current CD rates and high-yield savings rates to see what's available right now.
Savings Comparison Tool
Compare total growth over a fixed period.
CD vs. HYSA: Key Differences
Both accounts are FDIC-insured, but they serve different financial purposes. The main trade-off comes down to rate certainty vs. liquidity:
- CDs lock in a fixed APY for a set term (3 months to 5+ years). The rate is guaranteed regardless of what the Federal Reserve does, but you pay a penalty if you withdraw early.
- HYSAs let you withdraw any time without penalty, but the APY is variable — banks adjust it as market rates move. You can lose yield quickly in a falling-rate environment.
- Yield gap. CDs typically offer 0.25% to 1.00% higher APY than HYSAs at the same bank, as compensation for the lock-up.
How to Use the CD vs. HYSA Calculator
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Enter your initial deposit
Type in the amount you'd be putting into either the CD or HYSA. The calculator assumes you deposit the same amount in both for an apples-to-apples comparison.
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Set the term length
Enter how many months you'd be comparing. Match this to the CD term you're considering — e.g., 12 months for a 1-year CD, 60 months for a 5-year CD.
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Enter the CD APY you've been quoted
Use a rate from a real CD offer if you have one. If you're just exploring, top nationally-available CDs in 2025 are running roughly 4.25% to 5.00%.
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Estimate the HYSA APY
Enter the HYSA rate you expect to earn over the same period. Be realistic: even if your HYSA pays 5.00% today, that rate is variable — using a slightly lower expected average is more honest if rates may fall.
Which One Is Right for You?
The right choice depends on what kind of money you're parking. Same dollars, different jobs — pick the account that fits the job:
Choose a CD when
- You have a specific timeline (wedding, house down payment, tuition due in 2 years)
- You want to lock in today's rate before the Fed cuts
- You won't need the money before the term ends
- You want to maximize yield on idle cash you don't need access to
- You're laddering (try the CD ladder calculator for that approach)
Choose a HYSA when
- This is your emergency fund — access matters more than yield
- You expect rates to rise (HYSA captures the increase automatically)
- You're saving for a goal with no fixed deadline
- You might need to dip in unexpectedly
- The CD yield premium over your HYSA is small (under 0.25%)
The hybrid play: many savers use both. Keep 3 to 6 months of expenses in a HYSA as your emergency fund, then put longer-term savings (down payment, future tuition, retirement gap) into CDs to capture the yield premium. You don't have to pick one.
Frequently Asked Questions
Do HYSA rates change?
Yes. High-yield savings rates are variable and typically move in tandem with the Federal Reserve's federal funds rate. When the Fed cuts rates, HYSA APYs usually fall within weeks. CDs lock in the rate at the time you open the account, regardless of what happens to market rates afterward.
Is my money safe in both?
Yes, as long as the bank is FDIC-insured (or NCUA-insured for credit unions), your deposits are protected up to $250,000 per depositor, per institution, per ownership category. If you have more than that, spread it across multiple banks to keep all of it covered.
Can I lose money in a CD if I withdraw early?
You won't lose your principal, but you can lose interest and sometimes a small portion of principal. The early withdrawal penalty is typically 3 to 12 months of interest depending on the term length. If you withdraw before earning that much interest, the penalty eats into your principal. Our early withdrawal penalty calculator shows the exact dollar impact.
Should I open a CD if I think rates will rise?
Generally no — if you lock in a 5-year CD at 4.5% and rates climb to 6%, you're stuck with the lower rate (or pay a penalty to break it). In a rising-rate environment, HYSAs win because the rate moves up automatically. In a falling-rate environment, CDs win because they preserve today's higher rate.
What's the minimum deposit for each?
HYSAs at most online banks have $0 minimums. CDs typically require $500 to $1,000 minimums per CD, though jumbo CDs may require $100,000. Some institutions offer "no-minimum" CDs at slightly lower rates than their standard CDs.
Are HYSA and CD interest taxable?
Yes. Interest from both accounts is taxed as ordinary income at the federal level (and most state levels). Banks send you a 1099-INT each January showing the interest you earned. The tax treatment is the same for both products — no advantage either way.
Can I add money to a CD after I open it?
Generally no for traditional CDs — the deposit is fixed at opening. Some banks offer "add-on CDs" that allow additional deposits during the term, usually at slightly lower rates. HYSAs allow unlimited deposits at any time. If you want to keep adding savings monthly, an HYSA is more practical, even if a CD's headline rate is higher. See current savings rates to find an HYSA that fits.
