Vanguard Cash Plus is not a savings account — it's a money market fund that works like one

Vanguard Cash Plus (ticker VMFXX) holds your money in short-term bonds and cash equivalents rather than in a traditional savings account. The difference matters because it affects how your money is insured, how fast you can withdraw it, and what interest rate you earn. If you're comparing it to a regular savings account at a bank, you need to understand what you're trading off.

The fund is designed to feel like a savings account: you can deposit and withdraw money, you earn interest (called a "yield"), and the balance stays relatively stable. But legally and structurally, it's a mutual fund — which means your money is not covered by FDIC insurance the way a bank savings account is. Instead, it's protected by the Securities Investor Protection Corporation (SIPC), which covers up to $500,000 per account type at Vanguard.

Key Takeaways

  • Vanguard Cash Plus is a money market mutual fund, not a bank savings account, so FDIC insurance does not apply.
  • Your money is covered by SIPC insurance up to $500,000 per account type, which protects against brokerage failure but not against fund losses.
  • The yield on Vanguard Cash Plus changes daily and is typically higher than traditional savings accounts, but it can also fall.
  • You can withdraw money within one to two business days, which is faster than some savings accounts but slower than a checking account.
  • If you need FDIC protection or want a may provide rate, a bank money market account or high-yield savings account is a better choice.

How Vanguard Cash Plus works differently from a bank savings account

A bank savings account holds your money in the bank's vault or lends it out, and the bank pays you interest. The FDIC insures up to $250,000 per depositor per bank. Vanguard Cash Plus invests your money in a portfolio of short-term securities — mostly Treasury bills, commercial paper, and other low-risk debt that matures within 90 days. The fund's yield rises and falls with market interest rates.

Because Vanguard Cash Plus is a mutual fund, not a deposit account, the value of your shares can fluctuate slightly, though the fund is designed to keep the share price stable at $1.00. In extremely rare market conditions, the share price could drop below $1.00, which would mean a loss of principal — something that cannot happen with an FDIC-insured savings account. This has happened only once in U.S. history, during the 2008 financial crisis, and only to certain money market funds.

Withdrawals from Vanguard Cash Plus typically settle within one to two business days, which is faster than some banks but not as immediate as a checking account debit card. If you need the money today, a bank savings account or checking account is more practical.

Interest rates and yield: what you earn and how it changes

Vanguard Cash Plus publishes a current yield (also called the "7-day yield") that shows what you would earn if the fund's current interest rate stayed the same for a year. As of recent data, this yield has ranged from near zero during low-rate periods to over 5% during high-rate periods. The yield changes daily based on what interest rates the fund's holdings are earning.

Unlike a bank savings account with a fixed rate locked in for a term, the yield on Vanguard Cash Plus is variable. When the Federal Reserve raises interest rates, the yield typically rises within weeks. When rates fall, so does the yield. This means you benefit when rates are high but earn less when rates drop.

You can check the current yield on Vanguard's website or in your account. The yield is not the same as the interest you've actually earned — it's a projection. Your actual return depends on the yield during the time you hold the fund and any fees Vanguard charges (currently very low, around 0.13% annually for most investors).

SIPC insurance versus FDIC insurance

SIPC insurance protects you if Vanguard fails as a brokerage firm — it covers up to $500,000 per account type (so $500,000 in a brokerage account, another $500,000 in an IRA, etc.). It does not protect you against losses in the fund itself. If Vanguard Cash Plus loses value because of market conditions, SIPC does not reimburse you.

FDIC insurance, by contrast, protects your money up to $250,000 per depositor per bank against bank failure. It also protects you against any loss of principal — if the bank fails, you get your money back. FDIC coverage is broader in that sense, even though the dollar limit is lower.

In practice, Vanguard is one of the largest and most stable financial institutions in the world, and money market funds have an extremely strong safety record. But if absolute protection against any loss is your priority, an FDIC-insured savings account is the safer choice.

When Vanguard Cash Plus makes sense as a holding place for money

Vanguard Cash Plus works well if you have a large sum of money ($100,000 or more) that you want to keep safe and earning interest while you decide what to do with it. Because the yield is typically competitive with or better than bank savings accounts, and because there are no withdrawal limits or penalties, it's a practical temporary home for money.

It also works if you're already a Vanguard customer and want to keep cash in your brokerage account without moving it to a bank. The fund is easy to buy and sell within your Vanguard account, and you can set up automatic deposits.

Vanguard Cash Plus is less practical if you need immediate access to your money (use a checking account instead), if you want FDIC insurance protection, or if you're holding less than $10,000 (the yield difference from a bank account is usually small enough not to matter, and a bank account is simpler).

Alternatives if you want FDIC protection or a higher yield

If you want FDIC insurance, a high-yield savings account at an online bank typically offers rates competitive with or better than Vanguard Cash Plus, with full FDIC coverage up to $250,000. Banks like Marcus, Ally, and American Express offer rates that change daily just like Vanguard Cash Plus, but with FDIC protection.

A bank money market account is another option — it's an FDIC-insured account that often pays a higher yield than a regular savings account, though usually lower than Vanguard Cash Plus. Some banks also offer money market funds of their own, which work similarly to Vanguard Cash Plus but may have different fee structures.

If you have more than $250,000 to deposit, you can split it across multiple banks to stay within FDIC limits at each one, or you can use a service like InvestFunds or Sweep accounts that automatically distribute your money across multiple FDIC-insured banks. Vanguard Cash Plus avoids this complexity because SIPC covers up to $500,000 in a single account.

How to open and use Vanguard Cash Plus

To invest in Vanguard Cash Plus, you need a Vanguard brokerage account. You can open one online in about 10 minutes by providing your name, address, Social Security number, and employment information. There is no minimum deposit to open the account, though some Vanguard services have minimums.

Once your account is open, you can buy shares of Vanguard Cash Plus by transferring money from a bank account. The transfer typically takes one to two business days to settle. After that, you can buy or sell shares of the fund at any time during market hours (9:30 a.m. to 4 p.m. Eastern time on weekdays).

You can also set up automatic monthly deposits from your bank account, which is useful if you want to build up a cash reserve over time. Dividends from the fund are automatically reinvested into more shares unless you change that setting.

Frequently Asked Questions

Can I lose money in Vanguard Cash Plus?

In normal market conditions, no — the fund is designed to keep the share price stable at $1.00. In extremely rare circumstances (like the 2008 financial crisis), the share price could drop below $1.00, which would mean a loss. This has happened only once in U.S. history and only to certain money market funds, not Vanguard Cash Plus specifically.

Is Vanguard Cash Plus better than a high-yield savings account?

It depends on your priorities. Vanguard Cash Plus often pays a slightly higher yield and covers up to $500,000 per account type, but it lacks FDIC insurance and requires a brokerage account. A high-yield savings account is simpler, has FDIC protection, but typically covers only $250,000 and may pay slightly less.

How long does it take to withdraw money from Vanguard Cash Plus?

Selling shares typically takes one to two business days to settle. If you need the money faster, you can transfer it to a linked bank account, which usually takes another one to two business days. A checking account or bank savings account is faster if you need same-day access.

Do I pay taxes on the yield from Vanguard Cash Plus?

Yes, the yield is taxable as ordinary income in the year you earn it. If you hold the fund in a tax-advantaged account like an IRA or 401(k), the yield is not taxed until you withdraw the money. In a regular brokerage account, you owe taxes on the yield each year.

What's the minimum amount I need to invest in Vanguard Cash Plus?

There is no stated minimum to buy shares of Vanguard Cash Plus itself. However, you do need to open a Vanguard brokerage account first, and some Vanguard services have account minimums. Check Vanguard's current requirements when you open your account.