High-Yield Savings Accounts vs. Money Market Funds: Where Should You Keep Your Cash?

If you have cash set aside for an emergency, a large purchase or another near-term goal, you may be looking for a place where it can earn a competitive return without becoming difficult to access. Two options you may come across are a high-yield savings account and a money market fund.

Their names may sound similar, but they work very differently. A high-yield savings account is a deposit account at a bank or credit union. A money market fund is an investment that holds short-term debt, such as government or corporate securities.

That difference affects how your money is protected, how quickly you can use it and whether you could lose any of your original deposit. Before choosing based on the advertised return, it helps to understand what each option is designed to do.

Three similar names, three different products. 

Much of the confusion comes from three products that share similar names but do not work the same way:

• A high-yield savings account is a deposit account that generally offers a higher annual percentage yield, or APY, than a traditional savings account.

• A money market account is also a deposit account and may offer features such as check writing or debit card access.

• A money market fund, sometimes called a money market mutual fund, is an investment purchased through a brokerage firm, mutual fund company or other investment provider. It invests in short-term debt and other securities rather than holding traditional bank or credit union deposits.

The first two are deposit accounts. The third is an investment. That distinction affects insurance, risk and how you access your money.

High-yield savings accounts offer deposit insurance. 

A high-yield savings account held at a federally insured bank or credit union is generally covered by federal deposit or share insurance, subject to applicable limits. Accounts at federally insured banks are covered by the Federal Deposit Insurance Corporation, or FDIC. Accounts at federally insured credit unions are covered by the National Credit Union Share Insurance Fund, or NCUSIF, which is administered by the NCUA.

At a federally insured credit union, individual accounts are generally insured up to at least $250,000 per ownership category. Coverage can vary based on how accounts are owned and titled, so review the rules if you have larger balances.

This insurance protects eligible deposits if the financial institution fails. It does not cover every product the institution may offer. Stocks, bonds and mutual funds are investments and are not protected by FDIC or NCUA insurance.

Before opening an account, confirm that the institution is federally insured and that your balance falls within the applicable coverage limits.

Money market funds carry investment risk. 

A money market fund combines money from many investors and uses it to purchase short-term investments. Depending on the fund, those investments may include government securities, municipal debt or short-term debt issued by companies and financial institutions.

Many retail and government money market funds aim to keep their value at $1 per share. For example, an investor who places $1,000 in the fund would generally receive about 1,000 shares. The goal is for those shares to remain worth $1 each, but that value is not guaranteed. If the share price falls below $1, the investor could lose money.

Money market funds are generally considered lower risk than many other mutual funds, but they are still investments. They are not insured by the FDIC or NCUA.

The specific risks depend on what the fund invests in, which is why reviewing the fund's prospectus is important before investing.

A quick comparison.

These are general comparisons. Rates, fees, transfer times and account features vary, so review the terms of the specific account or fund you are considering.

How quickly can you actually use the money? 

High-yield savings accounts and money market funds are often described as “liquid,” meaning they can generally be converted to spendable cash without a long waiting period. But the steps required to access the money may differ.

With a savings account, you may be able to transfer money directly to checking through online or mobile banking. You may also be able to move it to an account at another financial institution. The timing depends on the account and the type of transfer.

With a money market fund, you generally need to sell, or redeem, your shares first. You may then have to transfer the proceeds from the investment account to the bank or credit union account you use to pay bills.

For example, if your car needs an unexpected repair, money in savings may be available after a transfer to checking. Money in a fund may require both a redemption and a separate transfer. Before deciding where to keep emergency savings, consider every step between requesting the money and being able to spend it.

Today’s return may not last.

The return on either option can change. A bank or credit union may raise or lower the APY on a high-yield savings account as interest rates and market conditions change. Money market fund yields also tend to move with short-term interest rates.

When comparing returns, remember that savings accounts typically advertise APY while money market funds often publish a seven-day yield. Because these figures are calculated differently, they are not always a direct comparison.

Fees, minimum-balance requirements and fund expenses can also reduce your actual earnings. Look beyond the headline number to understand what you may earn after costs and conditions.

Which option makes more sense for an emergency fund? 

An emergency fund has one primary job: giving you dependable access to money when an unexpected expense or loss of income occurs.

For many savers, a federally insured high-yield savings account can be a practical fit. It keeps emergency money separate from daily spending, allows it to earn interest and does not expose eligible deposits to investment losses within applicable insurance limits.

A money market fund may make sense for cash that is already in an investment account, particularly if you understand the fund’s holdings and are comfortable with its risks. But it should not be treated as federally insured simply because it is considered a relatively conservative investment.

You also do not have to make one choice for all your cash. For example, you might keep your core emergency fund in an insured savings account while using a money market fund for cash awaiting investment in a brokerage account. The right approach depends on when you expect to need the money, how you will access it and whether you are willing to accept investment risk.

Choose based on the money’s purpose. 

The choice between a savings account and a money market fund comes down to more than which one pays more. Start with what you need the money to do.

For many people, a high-yield savings account makes sense for emergency savings and other near-term goals because it combines earnings, federal insurance at eligible institutions and straightforward access to cash. A money market fund may be useful for cash held within an investment account, but it carries investment risk and does not include FDIC or NCUA insurance.

Before deciding, ask yourself one simple question: How soon might I need this money? The answer can help determine how much weight to give principal protection, accessibility and investment risk.