Commercial Paper

Last reviewed: September 30, 2026

Commercial paper is short-term, unsecured debt that companies and financial firms issue to cover near-term funding needs such as payroll, inventory, and receivables. In the U.S., maturities are typically 270 days or less, and buyers are mostly institutional investors who focus heavily on the issuer’s credit quality.

Reviewed September 2026

How commercial paper works

An issuer sells notes—often at a discount to face value—to investors or through dealers. At maturity the issuer repays face value. Because the paper is unsecured, there is no collateral pledged to note holders; repayment depends on the borrower’s cash flow and continued access to short-term funding markets.

Large, highly rated corporations and financial institutions dominate issuance. Money market funds, banks, and other institutions are typical buyers. Individual investors usually encounter commercial paper indirectly through money market funds or short-term bond funds rather than buying notes directly.

Why companies use it

Commercial paper can be a flexible, relatively low-cost way to bridge timing gaps between expenses and cash collections. It can also refinance other short-term borrowings. When markets are calm and credit is strong, rolling commercial paper is routine. When markets seize up, issuers may struggle to refinance maturing paper—a risk that became visible in past funding stresses.

Commercial paper vs. Treasury bills and bonds

U.S. Treasury bills are short-term obligations of the federal government and are generally considered among the lowest credit-risk instruments. Commercial paper carries corporate or financial-issuer credit risk and usually offers a higher yield as compensation.

Corporate bonds typically have longer maturities, may be secured or unsecured, and often trade in a deeper secondary market for retail-accessible sizes. Commercial paper is mainly a money-market instrument: short dated, institutional, and sensitive to overnight and short-term funding conditions.

Simple example

A manufacturer needs cash for 90 days while customers pay invoices. It issues commercial paper to institutional investors, receives cash immediately, and repays at maturity from collections or by rolling into new paper. If credit markets tighten and buyers demand much higher yields—or refuse to roll—the company may need bank lines or other backup liquidity.

Risks investors should understand

Credit risk is central: an issuer can default. Liquidity risk matters in stress, when secondary trading thins and rolling paper becomes expensive. Investors also face reinvestment risk as short notes mature frequently. Ratings and sponsor strength matter, but ratings are opinions, not guarantees.

Money market funds that hold commercial paper follow regulatory rules on liquidity, maturity, and credit quality. Even so, fund share prices and yields can move when short-term credit spreads widen.

Where this fits in a personal portfolio

Most individuals do not need to buy commercial paper directly. Emergency cash often belongs in insured deposits, Treasury bills, or high-quality money market funds after you understand fees and risks. Longer-term goals usually rely on a diversified mix of stocks and bonds sized to your risk tolerance—see our guides on asset allocation and risk and return.

The commercial paper market in stressful periods

In calm markets, rolling commercial paper is routine for strong issuers. In stress, buyers can disappear quickly, spreads can widen, and even well-known names may need backup bank lines or government facilities historically used in crises. That history is why cash investors should understand what sits inside a money market fund, not only its recent yield.

Yield is compensation for credit and liquidity risk over a short horizon. Chasing the highest yield among short-term instruments without reading holdings can backfire when credit conditions tighten. Prefer transparent funds and understand whether they emphasize Treasuries, agencies, or prime commercial paper.

How individuals usually get exposure

Direct purchase of commercial paper is uncommon for households. Exposure usually arrives through prime money market funds, some ultrashort bond funds, or corporate cash-management vehicles. Read the fund’s summary prospectus for maturity limits, credit standards, and liquidity rules.

If your priority is safety for near-term spending, high-quality Treasury bills or government money market funds are often a clearer fit than stretching into lower-quality short-term credit. Match the instrument to the job: emergency cash, near-term tuition, or long-term growth each deserve different tools.

For long-term investing, commercial paper is rarely a strategic asset class. Asset allocation across stocks and longer bonds usually drives outcomes more than optimizing a few basis points of money-market yield.

Ratings, programs, and backup liquidity

Issuers often maintain commercial paper programs with stated maximum outstanding amounts and work with dealers to place paper. Credit ratings from major agencies influence who can buy the notes—many money market funds are limited to high short-term ratings.

Backup liquidity lines from banks are a common risk-management feature for issuers. Those lines are not a guarantee that investors will be repaid in every scenario, but they reduce rollover risk when public markets temporarily close. As an end investor in a fund, you mainly need to know whether the fund emphasizes government paper or prime credit.

For household planning, treat commercial paper literacy as part of understanding cash investments—not as an invitation to concentrate savings in a single corporate issuer’s short-term notes.

Primary reference

See the Federal Reserve’s materials on money markets and commercial paper for institutional context, and Investor.gov for plain-language investing basics.