Yes, a bank can ask where you got your money, and in many situations federal law requires it to ask and to file a report with the government about the transaction. The Bank Secrecy Act has obligated financial institutions to keep these records since 1970, and the USA PATRIOT Act expanded the framework in 2001. When a teller asks what a deposit is for, they are following a compliance script, not making a personal judgment about you. How you answer, though, can matter a great deal.
Why Banks Have to Ask
The Bank Secrecy Act requires financial institutions to keep records and file reports that are “highly useful” in criminal, tax, and regulatory investigations, and in counterterrorism intelligence.1Office of the Law Revision Counsel. 31 USC 5311 – Declaration of Purpose Every bank in the country operates under this framework. It is not optional and it is not limited to certain customers or account types.
The USA PATRIOT Act added a requirement that banks maintain anti-money-laundering programs with internal controls, a designated compliance officer, employee training, and independent audits.2Financial Crimes Enforcement Network. USA PATRIOT Act The same law introduced the Know Your Customer framework, which obligates banks to verify who you are and understand the nature and purpose of your accounts. Questions about the source of a deposit come out of that framework.
Cash Deposits Over $10,000 Are Reported Automatically
Any cash transaction over $10,000 requires the bank to file a Currency Transaction Report with the Financial Crimes Enforcement Network (FinCEN).3eCFR. 31 CFR 1010.311 – Filing Obligations for Reports of Transactions in Currency The rule covers physical currency deposits, withdrawals, currency exchanges, and other transfers. Cashier’s checks, wire transfers, and electronic payments follow separate rules.
Before completing the transaction, the bank must verify and record your name, address, and Social Security or taxpayer identification number, along with specific identity documents such as a driver’s license or passport. Writing “known customer” is not permitted; the actual identifying information has to go on the report every time.4eCFR. 31 CFR Part 1010 Subpart C – Reports Required To Be Made Most banks also ask about the source of the cash as part of their internal anti-money-laundering programs. If you’re depositing $14,000 from a car sale, expect to explain that and possibly show a bill of sale.
The $10,000 threshold has not been adjusted for inflation since 1970. A CTR is routine paperwork. Banks file millions of them each year. Answering the questions and moving on is the normal outcome.
Suspicious Activity Reports and the $5,000 Threshold
Banks have a separate obligation to file a Suspicious Activity Report (SAR) when a transaction of $5,000 or more looks like it could involve illegal activity, money laundering, or an attempt to evade reporting requirements.5GovInfo. 31 CFR 1020.320 – Reports by Banks of Suspicious Transactions Unlike the CTR, which is triggered by a dollar amount, a SAR reflects the bank’s judgment that something doesn’t add up. A transaction with no apparent business purpose, an explanation that doesn’t match your normal activity, or funds that appear to come from an illegal source can all trigger one.
Banks can also voluntarily file SARs on smaller transactions if they believe the activity is relevant to a possible legal violation. There is no truly safe amount below which unusual activity goes unnoticed.
Here is the part most people don’t know. Federal law prohibits the bank from telling you a SAR has been filed. Any employee who discloses the filing to a person involved in the transaction violates the regulation.6eCFR. 12 CFR 208.62 – Suspicious Activity Reports If the bank asks questions, files the report, and processes your deposit normally, you’ll never know the report exists. SARs go directly to FinCEN’s database, where they’re available to law enforcement.
Do Not Try to Stay Under the Threshold
This is the single biggest mistake people make. Deliberately breaking up cash deposits to stay below the $10,000 CTR threshold is a federal crime called structuring. It doesn’t matter whether the underlying money is completely legitimate. The act of splitting deposits to dodge the reporting requirement is itself illegal, carrying penalties of up to five years in prison and fines.7Office of the Law Revision Counsel. 31 USC 5324 – Structuring Transactions to Evade Reporting Requirement
The definition is broad. Depositing $9,900 on Monday and another $9,900 on Wednesday, breaking $15,000 into three $5,000 deposits across different days, or spreading the same money across multiple branches all qualify as structuring if the purpose is to avoid a CTR. FinCEN’s guidance defines it as conducting transactions “in any amount, at one or more financial institutions, on one or more days, in any manner” to evade the CTR requirement.8Financial Crimes Enforcement Network. Frequently Asked Questions Regarding Suspicious Activity Reporting Requirements Banks train their staff to spot these patterns, and structuring is one of the primary triggers for a SAR.
Civil penalties for structuring can also equal the total amount of currency involved.9Internal Revenue Service. Bank Secrecy Act Penalties If you have $20,000 in legitimate cash from a garage sale, the right move is to deposit it all at once, answer the teller’s questions, and let the bank file the CTR. A CTR is paperwork. A structuring charge is a felony.
What to Bring So the Questions Are Easy
The specific documents a bank wants depend on where the money came from. Having the paperwork ready before you walk in makes the process faster and avoids holds on your funds.
- Asset sales: a signed bill of sale showing the price, date, and buyer’s contact information, plus any title transfer.
- Gifts: a gift letter from the giver confirming the money is a gift with no expectation of repayment.10Internal Revenue Service. Form 8300 and Reporting Cash Payments of Over $10,000
- Inheritance: a distribution letter from the estate’s executor or attorney, or a copy of the probate court order.
- Employment income: recent pay stubs or an employment verification letter.
- Business revenue: invoices, sales receipts, or financial statements that match the deposit amount. Owners who regularly deposit large sums in cash may find it easier to work through the bank’s commercial banking team.
- Gambling winnings: the Form W-2G issued by the casino.11Internal Revenue Service. Instructions for Forms W-2G and 5754
- Cash brought in from outside the United States: a stamped copy of FinCEN Form 105, which you’re required to file with Customs at entry for amounts over $10,000.12Financial Crimes Enforcement Network. FinCEN Form 105 Report of International Transportation of Currency or Monetary Instruments
What Happens If You Refuse to Answer or Lie
Declining to explain where the money came from doesn’t end the conversation. It escalates it.
The most immediate response is a hold on the deposit. Under Regulation CC, banks can delay availability of funds when they have reasonable cause for doubt, and their account agreements give them separate authority to restrict access when compliance concerns arise.13eCFR. 12 CFR Part 229 – Availability of Funds and Collection of Checks (Regulation CC) If the compliance department can’t resolve its concerns, the bank may freeze the account, blocking all activity until the matter is cleared or a court intervenes.
The bank can also close the account and mail you a cashier’s check for the balance. This is where the consequences last. Involuntary closures tied to suspected fraud or compliance issues are typically reported to specialty consumer reporting agencies such as ChexSystems and Early Warning Services.14Consumer Financial Protection Bureau. Will It Hurt My Credit if My Bank or Credit Union Closed My Checking Account? Negative records there stay for up to five years and make it hard to open a checking account at most other banks during that time. Meanwhile, the bank will almost certainly file a SAR with FinCEN, and it cannot tell you that it did.
Lying is worse. Under federal law, knowingly making a false statement to influence the actions of a federally insured financial institution is punishable by up to 30 years in prison and fines up to $1,000,000.15Office of the Law Revision Counsel. 18 USC 1014 – Loan and Credit Applications Generally; Renewals and Discounts; Crop Insurance That statute covers any false statement made during the course of banking business, including a fabricated source-of-funds explanation. Willful Bank Secrecy Act violations carry additional civil penalties, and violations involving special compliance measures can reach at least twice the transaction amount, up to $1,000,000.9Internal Revenue Service. Bank Secrecy Act Penalties
If you can explain where money came from, just explain it. If you can’t, the bank’s questions are not the real problem.
If Your Account Is Frozen or Closed
Start with the bank’s compliance department and ask for the specific reason in writing. Some restrictions come out of misunderstandings that documentation can resolve; the bill of sale or gift letter you didn’t have on deposit day may be enough after the fact.
If the bank won’t cooperate, file a complaint with the Consumer Financial Protection Bureau online or by phone at (855) 411-2372. Include the key facts, relevant dates, and supporting documents. The CFPB forwards the complaint to the bank, which generally must respond within 15 days, or up to 60 days in complex cases.16Consumer Financial Protection Bureau. Submit a Complaint You have 60 days after the bank’s response to give feedback.
A CFPB complaint won’t undo a SAR. Those filings are permanent and confidential. It can, however, put pressure on the bank to release frozen funds, reopen an account, or correct inaccurate ChexSystems reporting. You also have a right under federal law to request a free copy of your ChexSystems report and dispute any inaccurate information with the agency directly.