Cash alternatives are financial products built to keep your money safe and within easy reach while paying a modest return. The category covers savings accounts, money market deposit accounts, certificates of deposit, money market mutual funds, Treasury bills, and commercial paper. Returns are lower than what stocks or real estate can produce, and that is the price of knowing your principal is largely intact when you need it. The protections, tax treatment, and liquidity behind each option differ more than the shared “safe and liquid” label suggests, and those differences are what decide which one fits a given dollar.
Savings Accounts and Money Market Deposit Accounts
High-yield savings accounts and money market deposit accounts are the simplest options. Both sit at a bank or credit union, pay interest on the balance, and let you move money in or out with little friction. Money market deposit accounts sometimes add check-writing or a debit card; standard savings accounts usually do not.
The core protection is federal deposit insurance. The FDIC covers deposits at banks up to $250,000 per depositor, per institution, for each ownership category.1FDIC.gov. Deposit Insurance FAQs Credit unions carry equivalent coverage through the National Credit Union Administration. The ownership-category rule means a joint account and an individual account at the same bank each get their own limit, so households holding more than $250,000 in one place commonly spread deposits across categories or across banks to stay fully insured.
Interest is calculated daily or on an average daily balance and credited monthly in most cases. Rates move with the broader interest rate environment, so the “high yield” label can mean very different things depending on when you open the account. You get safety, insurance, and near-instant access; the yield will lag less liquid alternatives.
Certificates of Deposit
A CD locks up your money for a set term in exchange for a guaranteed, fixed interest rate. Terms run from a few months to five years or longer. Because the bank knows how long it has the funds, it pays more than it does on a savings account, and the rate holds for the full term regardless of what the market does afterward.
Federal rules under Regulation DD, the Truth in Savings rule, require banks to disclose rates, fees, and terms before you open a CD.2eCFR. 12 CFR Part 1030 – Truth in Savings (Regulation DD) CDs carry the same $250,000 FDIC insurance as savings accounts.1FDIC.gov. Deposit Insurance FAQs
Pulling money out early is where CDs bite. Federal law sets a minimum penalty of seven days’ simple interest for withdrawals within the first six days after deposit.2eCFR. 12 CFR Part 1030 – Truth in Savings (Regulation DD) Beyond that floor, banks set their own penalties, and they can be steep. Forfeiting three to six months of interest is common, and some banks charge more on longer-term CDs. There is no federal cap on the size of the penalty.3HelpWithMyBank.gov. What Are the Penalties for Withdrawing Money Early From a CD? Read the account agreement before you commit.
Brokered CDs
CDs are also sold through brokerage accounts rather than directly from a bank. Brokered CDs often come from multiple banks, which lets you spread money across institutions to stay within FDIC limits without managing many bank relationships. The bigger difference is liquidity: brokered CDs can be sold on the secondary market before maturity, so you avoid the issuing bank’s early withdrawal penalty. The selling price depends on current interest rates. If rates have risen since you bought, you may sell for less than face value; if rates have fallen, you may come out ahead.
Money Market Mutual Funds
Money market mutual funds look similar to money market deposit accounts but work very differently. These are investment products managed by fund companies, not deposits at banks. They invest in short-term, high-quality debt such as government securities and commercial paper. The SEC regulates them under Rule 2a-7, which limits what the funds can hold: eligible securities generally must mature within 397 days, and the fund’s board must determine that each holding presents minimal credit risk.4eCFR. 17 CFR 270.2a-7 – Money Market Funds
The critical distinction: money market mutual funds are not FDIC insured. The FDIC lists mutual funds among the products it does not cover, and that includes money market varieties.5FDIC.gov. Financial Products That Are Not Insured by the FDIC You can lose money. If you hold the fund through a brokerage account and the brokerage firm itself fails, the Securities Investor Protection Corporation covers up to $500,000 in missing securities and cash, with a $250,000 sublimit on cash. SIPC classifies money market mutual funds as securities for this purpose, not as cash.6Securities Investor Protection Corporation. What SIPC Protects SIPC does not protect you from investment losses; it steps in only when a brokerage collapses and customer assets go missing.
Stable NAV vs. Floating NAV
Retail money market funds and government money market funds still aim to hold a stable net asset value of $1.00 per share. Institutional prime money market funds do not. SEC reforms adopted after the 2008 financial crisis require institutional prime funds to use a floating NAV based on the actual market value of their holdings.7U.S. Securities and Exchange Commission. Money Market Fund Reform; Amendments to Form PF The share price on an institutional prime fund can therefore dip below $1.00 during periods of market stress. Government and retail funds were exempted from the floating NAV rule, so if stability of share price matters most, those are the categories to look for.
Treasury Bills
Treasury bills are short-term debt issued by the U.S. government in terms from four weeks to 52 weeks. They are backed by the full faith and credit of the United States, which puts them about as close to risk-free as any investment gets. Instead of paying periodic interest, T-bills are sold at a discount to face value. You might pay $9,800 for a bill with a $10,000 face value, and the Treasury pays you $10,000 at maturity. That $200 difference is your return.8TreasuryDirect. Treasury Bills
You can buy T-bills directly through TreasuryDirect or through a bank or brokerage. All T-bills are held electronically; paper certificates have not been issued in years. If you need the money before a bill matures, you can sell it on the secondary market, and the price will depend on where rates stand that day. With terms as short as four weeks, most individual holders simply hold to maturity.
Commercial Paper
Commercial paper is short-term corporate debt that large companies issue to cover everyday expenses such as payroll and inventory. These are unsecured obligations backed only by the issuing company’s creditworthiness; there is no collateral behind them. To avoid the expense of registering with the SEC, commercial paper must mature within nine months of issuance.9Office of the Law Revision Counsel. 15 U.S. Code 77c – Classes of Securities Under This Subchapter Most issues mature in days or weeks.10Board of Governors of the Federal Reserve System. Commercial Paper Rates and Outstanding Summary
This is not a market most individuals participate in directly. Minimum denominations typically start at $100,000 and can run much higher, which effectively limits buyers to money market funds, insurance companies, and pension funds. For an individual investor, exposure to commercial paper usually comes indirectly through a money market mutual fund that holds it. Rule 2a-7 restricts those funds to commercial paper meeting specific credit quality standards and caps how much lower-rated paper they can hold.4eCFR. 17 CFR 270.2a-7 – Money Market Funds That does not eliminate risk, but it keeps fund holdings in paper from issuers with the strongest balance sheets.
How Each One Is Protected
The protections vary and are worth comparing side by side before you decide where a dollar goes.
- Bank deposits (savings accounts, money market deposit accounts, CDs) are FDIC insured up to $250,000 per depositor, per institution, per ownership category.1FDIC.gov. Deposit Insurance FAQs
- Treasury bills carry the full faith and credit of the U.S. government.8TreasuryDirect. Treasury Bills
- Money market mutual funds are not insured by any government agency. SIPC covers brokerage failure, not fund losses.5FDIC.gov. Financial Products That Are Not Insured by the FDIC6Securities Investor Protection Corporation. What SIPC Protects
- Commercial paper carries no government guarantee. Repayment depends on the issuer’s credit.
Tax Treatment
Interest earned on most cash alternatives is taxed as ordinary income at the federal level. That covers savings accounts, CDs, money market funds, and commercial paper. There is no special rate or deferral; the interest is added to your taxable income for the year you earn it.
Treasury bills are the notable exception. The interest is subject to federal income tax but exempt from all state and local income taxes.11Internal Revenue Service. Topic No. 403, Interest Received Depending on your state’s rate, that exemption can meaningfully improve the after-tax return compared to a CD or savings account paying the same nominal yield. In a high-tax state, factor it into any comparison.
Some money market mutual funds invest exclusively in municipal securities, and the income from those holdings is generally exempt from federal income tax. A portion may still be subject to state tax or the alternative minimum tax depending on where the bonds were issued and where you live. Capital gains from the fund’s trading activity remain taxable regardless of fund type.
Risks and Limitations
The biggest risk with cash alternatives is not losing principal. It is inflation quietly eroding its purchasing power. If a savings account pays 4% and inflation runs at 3.5%, the real return is barely positive. In years when inflation outpaces the yield, you lose ground by sitting in cash alternatives even as the account balance keeps rising. That is the cost of safety, and it is easy to miss.
Credit Risk and Breaking the Buck
Money market funds aim for stability but are not bulletproof. SEC reforms after the 2008 crisis gave fund boards authority to impose redemption fees or temporary gates during periods of heavy outflows, in addition to requiring floating NAV at institutional prime funds.7U.S. Securities and Exchange Commission. Money Market Fund Reform; Amendments to Form PF Commercial paper defaults are rare among top-rated issuers, but the risk is not zero. Because the paper is unsecured, a sudden deterioration in the issuer’s financial health can leave holders exposed. Individual investors rarely face that risk directly because most of their exposure comes through regulated money market funds that diversify across many issuers.
Liquidity Is Not Always Instant
Cash alternatives are liquid by design, but liquid does not always mean same-day. CDs lock up your money for the full term unless you accept an early withdrawal penalty. Treasury bills can be sold before maturity, but the secondary market price moves with rates. Commercial paper is effectively illiquid for individuals. Even savings and money market accounts can take a business day or two for transfers to settle. If you need truly same-day access for an emergency, keep some portion in a plain checking account alongside these alternatives.