A Vanguard Cash Plus account is a money market fund that holds your cash and pays interest while you wait to invest it elsewhere

When you open an investment account at Vanguard, your cash doesn't sit in a regular bank account earning nothing. Instead, Vanguard puts it into a Cash Plus account — a money market mutual fund that invests in short-term, low-risk securities like Treasury bills and commercial paper. You earn interest on the balance, the rate changes with market conditions, and you can move money out whenever you need it.

Cash Plus is the default place Vanguard holds uninvested cash in most brokerage accounts. It's not a savings account, not FDIC insured, and not a place to park money long-term if you're looking for the highest possible yield. It's a holding tank that pays better than zero while you decide what to do with your money next.

Key Takeaways

  • Cash Plus is a money market fund where Vanguard automatically deposits your uninvested cash, earning interest that varies with market rates.
  • Your money is not FDIC insured because it's invested in securities, not held in a bank deposit account.
  • You can withdraw cash from Cash Plus instantly to buy investments or transfer it out, with no holding period or penalty.
  • The interest rate you earn depends on current money market yields and changes daily, so it's higher when the Federal Reserve raises rates and lower when rates fall.
  • Cash Plus is designed for temporary cash holdings, not as a long-term savings vehicle — other options may pay more if you're willing to lock money away.

How money moves into and out of Cash Plus

When you deposit money into a Vanguard brokerage account, it lands in Cash Plus automatically unless you tell Vanguard otherwise. When you sell an investment, the proceeds go into Cash Plus. When you receive a dividend or interest payment from a holding, it goes into Cash Plus. You don't have to do anything — it's the default destination.

Withdrawing is just as simple. You can move money from Cash Plus to buy stocks, bonds, or mutual funds. You can transfer it to your bank account. You can send it to another brokerage. The money is available immediately — there's no settlement delay or waiting period. If you need cash fast, Cash Plus doesn't hold it hostage.

Interest rates and what you actually earn

Vanguard's Cash Plus account invests in money market securities, which means the interest rate you earn tracks the broader money market yield. When the Federal Reserve raises its benchmark rate, money market yields rise and you earn more. When rates fall, so does your Cash Plus rate. Vanguard publishes the current yield on its website, and it changes daily.

The actual rate you see will be lower than the headline money market yield because Vanguard deducts a small expense ratio — typically around 0.16% per year, though this varies slightly. That means if the money market is yielding 5%, you might earn 4.84% after expenses. It's not free, but it's transparent and competitive with other money market funds.

The interest compounds daily and is credited to your account monthly. You don't have to do anything to collect it — it just accumulates in your Cash Plus balance.

Why Cash Plus is not the same as a savings account

A bank savings account is FDIC insured up to $250,000, meaning the federal government guarantees your money even if the bank fails. Cash Plus is not insured that way because it's a mutual fund, not a bank deposit. If the money market fund itself fails — an extremely rare event — you could lose money.

In practice, money market funds are very safe. They invest only in short-term government and corporate debt, and regulators require them to hold only the highest-quality securities. But the legal protection is different from a bank account, and that matters if safety is your only concern.

Cash Plus also doesn't have the same withdrawal rules as a savings account. You can move money out instantly with no limits, which is convenient but also means Vanguard isn't treating it as a savings product with restrictions.

When Cash Plus makes sense and when it doesn't

Cash Plus works well if you're actively investing — you're buying and selling regularly, you receive dividends, or you're building up cash to deploy into a position. It pays better than letting money sit in a zero-interest account, and you never have to think about where your cash is going.

Cash Plus is less useful if you're holding a large amount of cash long-term and want the highest possible yield. High-yield savings accounts at online banks often pay 4% to 5% and are FDIC insured. Treasury money market funds or short-term Treasury bonds may also pay more. If you're not actively investing and you're just parking money, comparing rates makes sense.

Cash Plus is also not the right choice if you need absolute safety and FDIC insurance. If that's your priority, a bank savings account is the right tool, even if the rate is lower.

How to change where your cash goes

You don't have to use Cash Plus. Vanguard lets you choose a different money market fund or sweep your cash to a linked bank account instead. You can set this up in your account settings under "Cash Management" or "Sweep Options," depending on your account type.

Some investors choose a Treasury money market fund instead, which invests only in U.S. Treasury securities and may pay slightly less but feels safer. Others link their Vanguard account to a high-yield savings account and have uninvested cash sweep there automatically. The choice is yours, and you can change it anytime.

Frequently Asked Questions

Is my money in Cash Plus safe?

Money market funds are very safe because they invest only in short-term, high-quality securities. However, they are not FDIC insured like a bank account. In the extremely unlikely event a money market fund fails, you could lose money. For absolute protection, use a bank savings account instead.

Can I lose money in Cash Plus?

Theoretically yes, but it's extremely rare. Money market funds are designed to maintain a stable $1 share price, and Vanguard's Cash Plus has a strong track record. The bigger risk is that the interest rate will be low when you need the money, not that the fund itself will fail.

How often does the interest rate change?

The rate changes daily because it's based on the current money market yield, which moves with interest rates set by the Federal Reserve. You'll see the new rate reflected in your account each day, and interest is credited monthly.

What happens to my Cash Plus money if I don't invest it?

It stays in Cash Plus earning interest indefinitely. There's no time limit or penalty for leaving it there. However, if you're holding a large amount for months or years without investing, you might earn more in a high-yield savings account or Treasury fund.

Can I move money from Cash Plus to my bank account?

Yes. You can transfer money from Cash Plus to any linked bank account, and it typically arrives within one to three business days depending on your bank. There's no fee or penalty for moving money out.