For a startup or small business, cash has near-term jobs: payroll, taxes, vendor invoices, and enough runway to absorb surprises. Treasury bills (T-bills) and money market funds can each provide short-term exposure, but they are different instruments with different cash-access mechanics and risks. Compare the exact security or fund and its terms, not just a quoted yield. Neither is a bank deposit, and neither should be treated as a guaranteed cash balance.
The basic difference: a bill you own or shares in a fund
A Treasury bill is a marketable U.S. Treasury debt security with an original maturity of one year or less. Bills are generally issued at a discount and pay their face amount at maturity. If the Treasury makes the scheduled payment, an investor holding a bill to maturity receives that face amount; the purchase price determines the return. A bill sold before maturity can be worth more or less than its purchase price as market rates and remaining time change. A bill is a direct U.S. government obligation, not an FDIC-insured bank deposit.
A money market fund is a mutual fund that holds a portfolio of short-term debt and cash-like instruments. Treasury and government funds, prime funds, and other categories can hold different securities, so their credit and liquidity exposures are not interchangeable. You own fund shares rather than a particular bill. Many government money market funds seek to keep a stable $1 share price, but that value is not guaranteed and a fund can lose value. Fund yields also change as holdings and market rates change, while expenses reduce the return to shareholders.
Liquidity is a process, not just a product label
With a bill, the planned cash date is its maturity date. Before maturity, an investor may be able to sell through a brokerage, but the market price can be above or below the purchase price and the sale has its own execution and settlement timing. At maturity, proceeds still need to settle in the investment account and move to the company’s bank. Brokerage cutoffs, weekends, holidays, and bank transfer times matter when payroll or a tax payment is due.
Many money market funds accept redemptions on business days, but the fund’s prospectus and account terms set the cutoff, pricing, settlement, and payment process. A redemption request does not always mean same-day cash in the operating account. Fund rules and applicable regulations can also allow liquidity fees or limits in specific circumstances. Check the current terms for the exact fund and account before relying on access for a dated obligation.
How the risks differ
- A T-bill’s repayment depends on the U.S. Treasury meeting its obligation. Selling before maturity adds market-price risk, including the possibility of receiving less than the purchase price.
- A money market fund is not FDIC-insured. Its exposure depends on its actual holdings and structure; a Treasury fund and a prime fund do not carry identical credit risks.
- A stable $1 target is not a promise. A fund’s share value can fluctuate, its yield can reset, and redemption timing can be affected by fund policies or stressed markets.
- Both choices can involve brokerage eligibility, minimums, cutoffs, settlement steps, and fees. Fund expenses and transaction costs reduce the return available to the business.
A practical cash-planning framework
- Set aside an operating reserve for payroll, taxes, and other near-term obligations before comparing investment options.
- Match any amount beyond that reserve to forecasted cash dates. A bill ladder can stagger maturities, but it still requires planning around each maturity and transfer.
- Compare the fund’s holdings and expenses, a bill’s maturity and purchase price, account or transaction fees, settlement timing, and any entity or account restrictions.
- Confirm how the company can access proceeds, who can authorize transfers, and which documents govern the specific account or fund.
Questions to ask before moving business cash
- What exact Treasury security or money market fund share class would hold the company’s cash?
- How soon can proceeds reach the company’s operating bank after a maturity or redemption, including cutoffs and non-business days?
- What can happen to price, redemption access, and fees in a stressed market?
- Which fees, tax reporting, eligibility requirements, and account restrictions apply to this entity?
This overview is educational, not individualized investment, tax, or legal advice. The right choice depends on a company’s cash forecast, risk tolerance, account terms, and professional guidance. Review the current offering documents and consult qualified advisers before making a decision.