A money market fund is one alternative to money market and savings accounts. MMFs are mutual funds that invest in short-term debt, like Treasury notes, CDs, commercial paper, cash, and cash equivalents. These are all very liquid assets, and MMF money is quite accessible, which means you can often get the funds on the same day. Some MMFs even come with checks or debit cards. Another possibility is a high-interest checking account. These have all the features that come with traditional checking accounts—plus, as the name says, they offer interest rates that rival and sometimes exceed those of money market accounts (though they often impose a cap on the amount of the balance they'll pay on). They may also require a certain number of transactions per month.