A sweep transaction is an automated bank process that, at the end of each business day, moves money between two of your accounts based on a balance you set in advance. Cash above that target gets swept into an account that earns interest or pays down a loan; if your primary account falls below the target, money flows back the other way. Sweeps are offered by banks, brokerages, and treasury management platforms, and the rate you earn, the insurance behind your money, and the risk you carry all depend on where the swept cash actually lands.
How the Mechanics Work
Every sweep runs off a number sometimes called a target balance or a peg. You tell the bank how much cash you want left in your primary account at the close of business. After the daily cutoff, once deposits, checks, and wires have posted, the system compares your actual end-of-day ledger balance to that target.1eCFR. 12 CFR 360.8 – Method for Determining Deposit and Other Liability Account Balances at a Failed Insured Depository Institution
Say your target is $10,000. If the day closes with $18,000 in the account, the extra $8,000 sweeps into a secondary account overnight. If the next day’s transactions would leave you at $6,000, the system pulls $4,000 back to restore your target. The transfers happen during overnight batch processing and settle before the next business day opens, so you rarely see a gap in availability.
That two-way flow is the whole point. The sweep up keeps idle cash productive. The sweep down prevents overdrafts without you watching the balance. You set the rule once, and the system handles the arithmetic every night after that.
The Main Kinds of Sweep Accounts
Commercial Sweeps
Businesses with sizable operating accounts often sweep excess cash into overnight repurchase agreements or money market funds. In a repo sweep, the bank effectively sells you government securities at the close of business and buys them back the next morning at a slightly higher price; the difference is your overnight return. These trades are typically collateralized by U.S. Treasury securities, which dominate the bilateral repo market.2Federal Reserve Bank of New York. The Use of Collateral in Bilateral Repurchase and Securities Lending Agreements The collateral is federal government debt, so credit risk is relatively low, but a repo is not the same thing as an FDIC-insured deposit, and that distinction matters if the bank fails.
The other common commercial choice sweeps cash into a money market fund. The mechanics are simpler: your cash buys fund shares overnight. Money market funds carry no FDIC coverage because they are securities, not bank deposits.3U.S. Securities and Exchange Commission. Cash Sweep Programs for Uninvested Cash in Your Investment Accounts – Investor Bulletin
Brokerage Sweeps
When you sell a stock, receive a dividend, or deposit cash into a brokerage account, that money doesn’t just sit there. Most firms automatically sweep uninvested cash into either a bank deposit program or a money market fund.4FINRA. Don’t Lose Interest: Managing Cash in Your Brokerage Account Which default your broker picked matters more than most people realize. As of early 2026, one major brokerage’s bank deposit sweep paid 0.02% annually on balances under $1 million while money market fund options at the same firm yielded over 3.5%. On $50,000 of uninvested cash, that gap works out to roughly $1,740 a year.
Your account agreement or brokerage statement tells you which option you’re enrolled in, and most firms let you switch.3U.S. Securities and Exchange Commission. Cash Sweep Programs for Uninvested Cash in Your Investment Accounts – Investor Bulletin Worth five minutes.
Personal Banking Sweeps
For individuals, the common setup links a checking account to a savings account. Excess funds move into savings at a higher rate; money flows back if checking runs low. The old six-transfer-per-month cap under Regulation D was deleted by the Federal Reserve in 2020, so that federal restriction no longer applies.5Federal Reserve Board. Savings Deposits Frequently Asked Questions Some banks still enforce their own transfer limits as internal policy, so read your account terms before assuming unlimited movement.
Loan Sweeps
Instead of earning interest on idle cash, a loan sweep uses it to reduce debt. Excess funds in checking automatically pay down the principal on a line of credit at the close of each business day. When you need cash back, the system draws against the credit line to restore your checking balance. You end up borrowing only what you actually need, and every dollar of surplus goes toward the balance. For businesses carrying revolving credit, this can meaningfully cut annual interest costs without anyone moving funds by hand.
What Insurance Actually Covers
Where the money lands determines what protects it, and this is where people get tripped up. Coverage runs from full government-backed insurance to essentially none.
Bank deposit sweeps. If funds land in an FDIC-insured bank account, they’re covered up to $250,000 per depositor, per bank, for each ownership category.6Federal Deposit Insurance Corporation (FDIC). Understanding Deposit Insurance The catch: if your brokerage sweeps cash to an affiliated bank, the $250,000 limit includes any other deposits you already hold at that same bank.
Money market fund sweeps. No FDIC coverage; these are mutual fund shares. If the brokerage firm itself fails (not the fund, the firm), SIPC may cover up to $500,000 per customer, including a $250,000 sublimit for cash claims. SIPC protects against broker insolvency, not investment losses.7SIPC. What SIPC Protects
Repo sweeps. The trickiest. If the transaction is properly executed and you have a perfected security interest in the collateral, you can claim those securities if the bank fails. If the arrangement wasn’t properly structured, the FDIC treats the funds as if they never left your deposit account, which means the standard $250,000 cap applies and you may be an unsecured creditor for anything above it.8Federal Deposit Insurance Corporation (FDIC). Processing of Deposit Accounts in the Event of an Insured Depository Institution Failure
Multi-Bank Sweep Networks
If you hold well over $250,000 in swept funds, some platforms use multi-bank networks that spread deposits across several FDIC-insured banks. Each bank insures up to $250,000 independently, so $1 million split across four banks can carry full FDIC coverage. You still see a single balance on your primary account; the distribution happens behind the scenes. These networks are most common in wealth management and commercial treasury platforms.
The Disclosure You Should Actually Read
Banks are required to disclose in writing whether swept funds remain FDIC-insured deposits. The disclosure must appear in new sweep contracts, in renewals, and at least annually.8Federal Deposit Insurance Corporation (FDIC). Processing of Deposit Accounts in the Event of an Insured Depository Institution Failure If the funds are not deposits, the disclosure has to explain what happens to your money if the bank fails: whether you’d have general creditor status or secured creditor status. It’s usually buried in the sweep agreement, and it’s the most important page in the whole document.
Taxes on Sweep Income
Interest earned through a sweep is taxable, and your bank or brokerage will report it. If you earn $10 or more in interest during the year, the institution must send you a Form 1099-INT.9Internal Revenue Service. Instructions for Forms 1099-INT and 1099-OID Below $10, you still have to report the income; the bank just isn’t required to send the form.
Money market fund sweeps are treated a bit differently. Stable-NAV money market funds, the type commonly used in sweeps, declare dividends daily and distribute them monthly, and shareholders typically reinvest automatically. Because the share price stays at $1.00, redemptions don’t generate capital gains or losses; you’re taxed on the income distributions. Bank sweep interest arrives on a 1099-INT. Money market fund income comes on a 1099-DIV.
For businesses running a loan sweep, the tax benefit is on the other side of the ledger. The interest you avoid by paying down a credit line faster isn’t reported as income; it simply reduces your deductible interest expense. Your accountant should track the sweep interest earned and the interest expense saved to see the full picture.
Setting Up a Sweep
Setup runs through a sweep service agreement that spells out the terms, fees, and linked accounts. You identify the primary account, choose the sweep vehicle (money market fund, bank deposit, repo, or credit line), and set the target balance. The agreement also says whether sweeps run daily or only when your balance crosses a threshold.
A few choices deserve real thought:
- Target balance. Too low, and you’ll trigger constant sweep-downs that can create timing issues. Too high, and cash sits in checking earning nothing. Look at your typical daily outflows over the past few months and add a reasonable cushion.
- Sweep vehicle. Bank deposit, money market fund, or repo each affects your rate, your insurance, and your liquidity. A business with $2 million in operating cash and an individual with $20,000 in a brokerage account will not land in the same place.
- Fees. Some institutions charge monthly fees for sweep services. One bank’s published commercial schedule shows $25 per month as of 2025, though costs vary. Brokerage programs often have no explicit fee and instead compensate the firm through the spread between what the affiliated bank earns on your deposits and what it pays you. That spread is why brokerage bank sweep rates can be so low.
Commercial accounts usually get set up through a treasury management portal or a relationship manager. Personal and brokerage sweeps are configured through online banking or a call to the broker. Most institutions need a few business days to verify linked accounts before the first sweep runs.10American Bankers Association. ABA Routing Number: Find Your Number, and Search Database
Watching the Account
Once active, sweep transactions show up in your daily activity reports and monthly statements. Each entry shows the amount swept in or out, the rate on the secondary account, and the resulting balance. Many banks send a confirmation through secure messaging when the first sweep executes, so you can check the system is doing what you asked.
If something looks wrong, a sweep that shouldn’t have triggered or an incorrect amount, contact the bank promptly and put it in writing. For accounts at nationally chartered banks, the institution generally has 30 days to acknowledge a written notice and must resolve the issue within two billing cycles, up to 90 days.11HelpWithMyBank.gov. How Long to Resolve a Billing Error Dispute on My Credit Card Account Keep the daily reports; they’re your best evidence in a dispute, and you’ll need the interest totals at tax time anyway.