CDs and Money Market Accounts: Safe Places to Park Cash

Certificates of deposit and money market accounts are the two main options for cash you want to keep safe but earn more than a traditional savings account offers. The core distinction is straightforward: a CD locks in a fixed rate for a defined term — three months, six months, one year, five years — and penalizes early withdrawal. A money market account (MMA) is a deposit account with immediate access, a rate that floats with market conditions, and FDIC insurance. Both are substantially safer than investing, which is exactly the point: they're for money that shouldn't be in the market.

A note on terminology: money market accounts (bank deposit accounts with FDIC insurance) are different from money market funds (investment funds holding short-term debt securities, not FDIC-insured). Both are commonly called 'money markets,' which creates confusion. The bank deposit version is what most people mean when comparing to a CD; the fund version is what you'll typically find inside a brokerage account holding uninvested cash.

Certificates of deposit — locking in rate certainty

CDs pay a fixed interest rate for a fixed term, guaranteed by the issuing bank and FDIC-insured up to $250,000 per depositor per institution. The rate advantage over high-yield savings accounts comes from surrendering liquidity — you're compensating the bank for knowing it has your money for a defined period. Early withdrawal penalties vary by bank and term; common structures charge 60 to 180 days of interest for early redemption on a 12-month CD, and up to 12 months of interest on a 5-year CD. Compare the penalty to your expected return before committing.

No-penalty CDs exist at some banks — Marcus (Goldman Sachs) and Ally have offered them periodically — allowing early withdrawal after a brief holding period with no interest forfeiture. Rates on no-penalty CDs are typically lower than standard CDs of the same term, reflecting the extra flexibility. Brokered CDs, purchased through a brokerage rather than directly from a bank, are tradable on the secondary market before maturity (avoiding the penalty) but may sell below face value if interest rates have risen since purchase, introducing price risk similar to bonds.

CD ladders — capturing higher rates while maintaining liquidity

A CD ladder solves the liquidity problem by staggering maturities. Instead of putting $20,000 into a single 5-year CD, you put $5,000 into a 1-year, 2-year, 3-year, and 4-year CD. Each year one CD matures, giving you access to a quarter of your cash. When it matures, you reinvest in a new 4-year CD (maintaining the ladder). After four cycles, all your CDs mature annually. This approach captures higher long-term rates while ensuring regular access to principal, and reinvestment at maturity allows you to benefit from rising rates rather than being locked into older, lower rates.

In a flat or declining rate environment, a CD ladder loses some appeal — locking in long-term rates is more attractive when you expect rates to fall, and less so when you expect them to rise. In 2023 and 2024, short-term CD rates were often higher than long-term rates (inverted yield curve), making a short-duration CD or T-bill ladder more rational than extending to 5 years. The right ladder length depends on your liquidity needs and your view of where rates are headed.

Money market accounts vs. high-yield savings — what actually differs

Money market accounts and high-yield savings accounts (HYSAs) are functionally similar: both are FDIC-insured bank deposit accounts earning variable rates. The structural differences are minor: MMAs historically had limited transaction capability and sometimes offered check-writing privileges, while HYSAs were pure savings accounts. Federal regulations previously capped savings account withdrawals at six per month; that rule was suspended in 2020 and most banks no longer enforce it. In practice, the two products are now nearly interchangeable — compare rates and pick the better one.

The right framework: cash you'll need within three months goes in an MMA or HYSA for full liquidity. Cash earmarked for a specific purpose in 6 to 24 months — a home down payment, a tax bill, a planned purchase — may belong in a short-term CD or T-bill to capture a slightly higher guaranteed rate. Cash beyond that horizon either belongs in a longer ladder or, if the time horizon is truly five-plus years, should prompt the question of whether some of it should be invested. Keeping more than two years of living expenses in cash instruments at historically normal rates means accepting meaningful inflation erosion in exchange for certainty — a trade-off worth making intentionally.