Money Market vs HYSA vs CD Calculator

Money market accounts, high-yield savings accounts, and certificates of deposit are all federally insured, interest-bearing deposit products, but they differ in their rate structure, liquidity, and typical use case. A money market account (MMA) generally offers a higher yield than a traditional savings account and may include check-writing privileges and a debit card, but typically requires a higher minimum balance and may limit withdrawals. A high-yield savings account offers competitive rates with more flexibility and no check-writing, often with no minimum balance at online institutions. A certificate of deposit (CD) locks your money for a fixed term in exchange for a guaranteed fixed rate; early withdrawal typically triggers a penalty, often equal to several months of interest. Rates on all three products fluctuate with the federal funds rate set by the Federal Reserve, so the best option changes as the interest rate environment changes. This comparison calculator takes your deposit amount, time horizon, and the current rate on each product, then shows the ending balance and total interest earned for all three accounts side by side so you can quantify the trade-off between liquidity and yield for your specific situation. It also notes whether each product is likely to meet FDIC or NCUA insurance limits on your balance.

For a $25,000 deposit at current rates over 24 months, CDs earn the most with a final balance of --.

Formula: compound interest for each vehicle using rates and time horizon you enter. Source: FDIC Weekly National Rates, as at 13 June 2026.

Amount to compare across products
User-provided; check your institution
User-provided; check your institution
User-provided; check your institution
Lock-in period; cannot access without penalty
How long until you need the money

Money Market Account

APY--
Final balance--
Interest earned--
LiquidityFully liquid

High-Yield Savings

APY--
Final balance--
Interest earned--
LiquidityFully liquid

Certificate of Deposit

APY--
Final balance--
Interest earned--
LiquidityLocked for term

How each product calculates interest

All three products compound interest daily at the stated APY. The calculation is identical: final balance = principal x (1 + daily rate)^days. The difference is liquidity and term.

Daily rate = APY / 365
Days = time horizon in months x 30.44
Final balance = principal x (1 + daily rate)^days
Interest earned = final balance - principal

Worked example

$25,000 for 24 months at Money Market 4.50%, HYSA 4.75%, CD 5.10% (12-month term):

  1. Money Market: 25,000 x (1 + 0.0450/365)^730 = $27,348.78
  2. HYSA: 25,000 x (1 + 0.0475/365)^730 = $27,469.44
  3. CD (first 12 months): 25,000 x (1 + 0.0510/365)^365 = $26,311.35
  4. CD (at maturity, reinvest at same rate for 12 more months): 26,311.35 x (1 + 0.0510/365)^365 = $27,646.67
  5. Winner over 24 months: CD at $27,646.67 (but only if you reinvest at maturity)

Choosing between the three products

The choice depends on your time horizon, rate environment, and need for liquidity.

  • Near-term goals (less than 6 months): Use HYSA or money market for full liquidity and competitive rates. CDs may not pay enough extra to offset a potential need to withdraw early.
  • Medium-term goals (6 months to 2 years): CDs can make sense if the rate premium is meaningful (0.25-0.50% higher) and you are confident you will not need the money. Otherwise, HYSA is safer.
  • Longer-term goals (2-5 years): CDs often pay significantly more (0.50-1.00% higher) and justify the lock-in period. Ladder CDs with staggered maturities to get periodic access to principal.
  • Emergency funds: Always use HYSA or money market. Liquidity matters more than the extra 0.1-0.2% a CD might pay.

This calculator assumes CDs are held to maturity and reinvested at the same rate. If rates change or you need the money early, results will differ. Use this as a planning tool, not a guarantee.

Savings vehicles: frequently asked questions

What are the differences between money market, HYSA, and CD accounts?

All three are FDIC-insured deposit accounts but with different features. High-yield savings accounts (HYSA) offer full liquidity: withdraw at any time without penalty, though rates are user-provided. Money market accounts also offer liquidity and typically pay rates comparable to HYSA, but may include check-writing features. Certificates of Deposit (CDs) lock your money for a fixed term (3 months to 5 years) and charge penalties for early withdrawal, typically forfeiting 90 days of interest. CDs usually pay higher rates in exchange for locking your money.

Should I choose the highest rate or consider liquidity?

It depends on your time horizon and risk tolerance. If you need access to your money within six months, a CD penalty could erase the benefit of a higher rate. For near-term goals or emergency funds, HYSA offers the best combination of competitive rates and full liquidity. For money you do not need for 1-5 years, a CD often pays enough higher rate to justify the lock-in period. This calculator shows all three options so you can compare total balance at your time horizon.

What happens if I withdraw money from a CD early?

CDs impose early withdrawal penalties, typically forfeiting 90 days of interest on short-term CDs (3-6 months). Longer-term CDs may penalize one year's worth of interest. The penalty reduces your final balance. For example, if you open a $25,000 CD at 5% for 12 months but need the money after 6 months, you lose roughly $625 in penalty and earn only $625 in interest, netting zero. This is why liquidity matters: if you might need the money, HYSA is safer.

Are money market accounts, HYSA, and CDs all FDIC-insured?

Yes, all three products at FDIC-insured banks (and credit union equivalents at NCUA-insured credit unions) are protected up to $250,000 per depositor, per bank, per ownership category. The insurance covers principal and accrued interest. If your balance exceeds the limit, spread funds across multiple banks. This calculator assumes all three accounts are at FDIC-insured institutions.

How do I know what CD term to choose?

Choose a CD term that matches your time horizon. If you need the money in 12 months, a 12-month CD makes sense. If you need it in 6 months, a 6-month CD is safer. Longer-term CDs (3-5 years) often pay higher rates but lock your money for longer. You can also build a CD ladder: open multiple CDs with staggered maturity dates so portions of your money mature at intervals, giving you periodic liquidity.

What if rates change after I open an account?

Once you open a savings account or HYSA, the rate may change based on Federal Reserve policy and bank competition. Rates for existing deposits can go up or down. CDs are different: your rate is locked in for the entire term. If rates rise, your CD earns the original rate, which is now below market. If rates fall, your locked-in rate looks good. This lock-in is both a benefit and a risk depending on where rates move.

Official sources

Reviewed by the CalculatorHub team, edited by James Graham, 13 June 2026. See our methodology. General information, not financial advice. Rates are user-provided and subject to change.