What a sweep account does

A sweep account is a checking account linked to a savings account or money market account at the same bank. At the end of each business day, the bank automatically moves any balance above a set threshold from your checking account into the linked savings or money market account, then sweeps the money back into checking the next morning when you need it.

The purpose is simple: earn interest on money sitting idle in checking, where it normally earns nothing. Since checking accounts traditionally pay zero or near-zero interest, the bank moves excess funds to a higher-yield account overnight, then returns them so your checking balance is ready for the next day's transactions.

You do not have to do anything. Once the sweep is set up, it happens automatically every business day. You write checks, use your debit card, and make deposits as normal. The sweep runs behind the scenes.

Key Takeaways

  • A sweep account automatically moves money from checking to savings or money market each night, then returns it the next morning so you have funds available for daily transactions.
  • The threshold—the amount left in checking—is set by you or your bank, and balances above that threshold get swept to earn interest.
  • Sweep accounts are most common at banks offering them to business customers or high-balance depositors, though some consumer banks offer them too.
  • The interest earned is usually modest because the money only sits in the savings account for one night, but it beats earning nothing in checking.
  • You retain full access to all your money; the sweep does not lock funds away or delay withdrawals.

How the sweep timing works

The sweep happens at the end of the business day, typically after 5 p.m. or whenever your bank closes its daily processing cycle. The bank calculates your checking balance, subtracts the threshold amount you set, and moves the remainder to the linked savings or money market account.

The next morning, before you start using your account, the bank sweeps the money back into checking. This means your checking balance is restored and ready for any transactions you make during the day. If you deposit money during the day, that deposit stays in checking until the next sweep cycle.

Weekends and holidays complicate the timing. If Friday is the last business day before a weekend, the sweep still happens Friday evening, and the money returns to checking Monday morning. Your funds are not locked away; they are simply earning interest over the weekend in the linked account.

The threshold and how to set it

The threshold is the minimum balance your bank leaves in checking. Everything above that amount gets swept out. For example, if your threshold is $5,000 and your checking balance is $8,000 at the end of the day, the bank sweeps $3,000 to savings.

You usually set the threshold yourself when you open the sweep, or your bank may set a default. The threshold should be high enough to cover your typical daily spending and any checks you write, but low enough that you have money to sweep and earn interest on. If your threshold is too high, little or nothing gets swept, and you earn almost nothing.

Some banks let you change the threshold anytime. Others require you to contact customer service. If you know you have a large bill coming due, you can raise the threshold temporarily so more money stays in checking and is available immediately.

Interest earned and how little it usually is

The interest you earn depends on the rate the linked savings or money market account pays. Money market accounts typically pay more than savings accounts, so if your sweep links to a money market account, you earn more.

The catch is that the money only sits in the higher-yield account for one night. If the money market account pays 4% annually, you earn roughly 0.01% on that one night's balance. Over a year, if you sweep $3,000 every night, the total interest is modest—often $10 to $50 per month, depending on the rate and your balance.

Sweep accounts make the most sense if you carry a large balance in checking and have no other use for that money. A small business with $50,000 in checking might earn $100 to $200 per month from a sweep. A consumer with $2,000 in checking might earn $2 to $5 per month. The interest is real but small.

Who offers sweep accounts and where to find them

Large national banks like Chase, Bank of America, and Wells Fargo offer sweep accounts, though they are more common on business checking accounts than consumer accounts. Credit unions sometimes offer them too. Online banks rarely do, because their savings rates are already high enough that the sweep adds little value.

If you have a business checking account, ask your bank whether a sweep is available. If you have a consumer checking account, you may need to ask specifically; many banks do not advertise the feature. Some banks require a minimum balance—$25,000 or $50,000—before they will set up a sweep.

If your current bank does not offer sweeps, you can still earn interest on idle checking money by moving it to a high-yield savings account at a different bank. You lose the automatic sweep convenience, but you control when to move money and can earn more interest because the money stays in savings longer.

Sweep accounts versus money market accounts

A sweep account is not the same as a money market account. A money market account is a standalone account that earns interest but usually requires a minimum balance and limits how many withdrawals you can make per month. A sweep account is a checking account paired with a money market account, where the checking account remains your main account for daily use.

The advantage of a sweep is that you keep your checking account as your primary account—you write checks, use your debit card, and receive direct deposits there. The sweep simply moves excess money to earn interest without changing how you use checking.

If you want to earn interest without the complexity of a sweep, you can open a high-yield savings account at a different bank and manually transfer money when you have excess checking balance. This gives you more control and often higher interest rates, but requires you to remember to move the money yourself.

Frequently Asked Questions

Does a sweep account protect my money if the bank fails?

Yes. Both your checking and the linked savings or money market account are covered by FDIC insurance up to $250,000 each. The sweep does not change your coverage. If the bank fails, the FDIC covers both accounts separately, so you are protected up to $500,000 total ($250,000 in checking, $250,000 in the linked account).

Can I withdraw money from the swept account before it sweeps back?

Yes. The money in the linked savings or money market account is yours and you can withdraw it anytime. If you withdraw swept money, it does not automatically return to checking, so you may have less available in checking the next day. Check your bank's rules before withdrawing from the linked account.

What happens if my checking balance falls below the threshold?

The sweep only moves money out of checking, not into it. If your balance falls below the threshold during the day, the sweep does not trigger. The next day, if your balance is still below the threshold, nothing gets swept. The sweep resumes once your balance rises above the threshold again.

Do I pay fees for a sweep account?

Most banks do not charge a separate fee for the sweep itself. However, the linked savings or money market account may have its own fees or minimum balance requirements. Read your account agreement to confirm what fees apply to both the checking account and the linked account.

Can I set up a sweep with an account at a different bank?

No. Sweeps only work between accounts at the same bank. If you want to move money between banks automatically, you would need to set up a transfer through your bank's online platform or use a third-party service, but that is not a true sweep and does not happen automatically each night.