Betterment Cash Reserve is not a savings account—it's a money market fund that holds your cash in short-term bonds instead of a bank deposit account

The distinction matters because it changes how your money is protected, what interest rate you earn, and how quickly you can access funds. Betterment Cash Reserve invests your deposits in a portfolio of short-term bonds and other debt instruments rather than holding them in a traditional savings account at a bank. This means your money is not covered by FDIC insurance, which protects bank deposits up to $250,000 per account holder per institution.

If you opened a Cash Reserve account thinking it would work like a regular savings account at a bank, you should understand what you actually have and what the real risks and benefits are. The account does pay interest and lets you withdraw money, but the mechanics underneath are different from what most people expect when they hear the word "savings."

Key Takeaways

  • Betterment Cash Reserve is a money market fund, not a bank savings account, so deposits are not protected by FDIC insurance.
  • Your money is invested in short-term bonds and similar instruments, which means the value can fluctuate slightly, though the risk is low.
  • Interest rates on Cash Reserve typically track with money market rates and can change weekly, unlike some fixed-rate savings accounts.
  • Withdrawals usually process within one to three business days, not when ready, because the fund must sell holdings to send you cash.
  • If you need FDIC protection or want a may provide rate, a traditional bank savings account or money market account is a better fit.

How Betterment Cash Reserve actually works

When you deposit money into Cash Reserve, Betterment does not hold it in a bank account under your name. Instead, the money goes into a pooled fund that buys short-term bonds, Treasury bills, and other low-risk debt securities. The fund's value changes slightly as interest rates move and as the bonds it holds approach maturity. You earn interest based on the fund's performance, which is why the rate fluctuates rather than staying fixed.

This structure is called a money market fund, and it is regulated by the Securities and Exchange Commission (SEC), not by banking regulators. The fund itself is held at a custodian bank for safekeeping, but your deposits are not in a separate bank account. That distinction is why FDIC insurance does not explore—FDIC only covers deposits held directly at banks, not investments in funds.

Betterment publishes the current yield on Cash Reserve, and you can see what the fund holds and how it is performing. The holdings are very safe—mostly government debt and high-quality corporate bonds with short maturities—but they are not risk-free. If interest rates rise sharply, the value of existing bonds falls, and the fund's value can dip slightly. In practice, these moves are small, but they are possible in a way they are not with a bank savings account.

FDIC insurance and what it means for your money

FDIC insurance protects deposits at member banks up to $250,000 per account holder per institution. If the bank fails, the FDIC steps in and returns your money. Betterment Cash Reserve is not a bank deposit, so this protection does not cover it. If Betterment or the custodian bank holding the fund assets were to fail, your money would be part of the fund's assets and would be recovered through the fund's liquidation process, but you would not have the same may provide.

In practice, the risk is very low. Betterment is a registered investment adviser, and the fund is held at a major custodian bank. Money market funds have a long history of stability, and the SEC's rules require them to hold only high-quality, short-term securities. But the lack of FDIC insurance is a real difference from a traditional savings account, and it matters if you are risk-averse or if you have more than $250,000 to store safely.

If FDIC protection is important to you, open a savings account or money market account at a bank instead. Many banks now offer competitive interest rates on savings accounts, and your deposits will be fully insured up to $250,000.

Interest rates and how they compare to bank savings accounts

Betterment Cash Reserve's interest rate changes weekly based on the fund's holdings and current market conditions. When money market rates are high, Cash Reserve's rate is usually competitive with or better than bank savings accounts. When rates fall, the difference narrows. You can see the current rate on Betterment's website, and it updates automatically as the fund's yield changes.

Bank savings accounts typically offer a fixed rate that the bank sets and can change at any time, but usually only when the Federal Reserve moves rates. Some banks offer variable-rate savings accounts that track money market rates more closely, and those can be comparable to Cash Reserve. The key difference is that a bank account rate is may provide by the bank, while a money market fund rate depends on what the fund earns.

Over the past few years, both money market funds and high-yield savings accounts have offered rates well above the national average for regular savings accounts. The gap between them has been small. If you are choosing based on interest rate alone, compare the current rates at the time you are deciding, because both change frequently.

How fast you can access your money

Betterment Cash Reserve allows you to withdraw money, but the process is not when ready. Withdrawals typically take one to three business days to reach your bank account. This is slower than transferring money out of a traditional savings account at the same bank, which can be when ready. The delay happens because the fund must sell some of its holdings to raise cash, and that settlement takes time.

If you need money when ready, Cash Reserve is not the right place to keep it. Use a checking account or a savings account at your bank for money you might need within a day or two. Cash Reserve works better for money you are willing to leave alone for a few days and that you do not need when ready access to.

Betterment also limits how many withdrawals you can make per month, though the limit is usually high enough that it does not affect most people. Check the current terms on Betterment's website to see the exact limit.

When Cash Reserve makes sense and when it does not

Betterment Cash Reserve is a reasonable choice if you want to earn interest on cash you are holding temporarily, you do not need when ready access, and you are comfortable with the lack of FDIC insurance. It works well as a holding place for money you are saving toward a goal a few months away or for an emergency fund that you do not expect to touch often.

Cash Reserve is not the right choice if you need FDIC protection, if you might need the money within a day or two, or if you want a may provide fixed rate. In those cases, a high-yield savings account at a bank, a money market account at a bank, or a regular savings account is a better fit. Many banks now offer savings accounts with rates competitive to or better than Cash Reserve, and your deposits are fully insured.

If you already have Cash Reserve and are happy with the rate and the access, there is no urgent reason to move the money. But if you are opening a new account and are unsure whether you want a money market fund or a bank account, start with a bank savings account. The FDIC insurance and simpler mechanics are worth the small difference in interest rate.

What to check before you decide

Before you open or keep money in Betterment Cash Reserve, review the current interest rate, the fund's holdings, and Betterment's withdrawal terms. Compare the rate to what you can earn at your bank or at other money market funds. Check how long withdrawals take and whether the limit on monthly withdrawals fits your needs.

Read Betterment's disclosure documents, which explain the fund's strategy, risks, and fees. Money market funds typically have low fees, but they are not free. Knowing what you are paying helps you decide whether the rate is actually competitive after fees are deducted.

If you are moving money from a bank savings account to Cash Reserve, make sure you understand that you are trading FDIC insurance for a potentially higher rate. If you are moving money from a checking account, make sure you are comfortable with the one- to three-day withdrawal timeline.

Frequently Asked Questions

Can I lose money in Betterment Cash Reserve?

In theory, yes, because it is a money market fund and the value of its holdings can fluctuate. In practice, the risk is very small. Money market funds hold only high-quality, short-term debt, and the SEC's rules limit what they can own. Losses are rare and usually tiny. But it is not the same as a bank savings account, where your principal is may provide.

Is my money safe if Betterment goes out of business?

The fund's assets are held at a separate custodian bank, not by Betterment itself, so your money would not disappear if Betterment failed. However, you would not have FDIC insurance protecting the fund's value. The fund would be liquidated, and you would receive your share of the proceeds, but the process could take time.

Can I use Cash Reserve as my emergency fund?

You can, but only if you are comfortable with a one- to three-day withdrawal timeline. If you need money within hours, keep your emergency fund in a checking account or a savings account at your bank instead. Cash Reserve works for an emergency fund you do not expect to touch often and can wait a few days to access.

How does the interest rate on Cash Reserve compare to my bank's savings account?

It depends on the current rates at both institutions. Check Betterment's website for the current Cash Reserve yield and compare it to your bank's savings account rate. Rates change frequently, so the comparison today may not be the same next month. Both are worth checking regularly if you are deciding where to keep cash.

Do I have to pay taxes on the interest I earn?

Yes. Interest from Cash Reserve is taxable income and must be reported on your tax return. Betterment will send you a 1099 form at the end of the year showing how much interest you earned. This is the same as interest from a bank savings account.