Depositing cash into a business account works much like a personal deposit: you take the cash to the bank with a deposit slip and your ID, or you use an ATM or night drop. The complications are not at the counter. They start at the $10,000 reporting threshold, at the recordkeeping the IRS expects behind every deposit, and at the line between a legitimate capital contribution and an unexplained deposit an auditor treats as income.
What to Bring and How the Deposit Works
Bring the account number, a government-issued photo ID such as a driver’s license or U.S. passport, and the cash itself.1HelpWithMyBank.gov. Required Identification Types If an employee is making the deposit for you, they have to be listed on the account as an authorized signer or representative. Banks will turn away someone who isn’t, even with a correct account number and a filled-out slip.
The deposit slip is the formal record. Fill in the date, the business’s legal name as it appears on the account, and the amount. Most banks want a breakdown by denomination so the total on the slip matches what the teller counts. Blank slips sit in the lobby.
Handing cash to a teller is the most reliable method because the count happens in front of you and you leave with a receipt. ATMs that accept cash deposits work for smaller amounts, with daily limits that vary by bank and card. Night drop boxes let you leave a sealed bag of cash and a deposit slip in a secure chute after hours, and staff process it the next business morning. If you use the night drop, a tamper-evident deposit bag with a unique serial number is worth the small cost; the bag shows if someone opened it in transit.
When the Cash Becomes Available
Regulation CC sets the timing. Cash handed to a bank employee in person must be available for withdrawal no later than the next business day. Cash deposited through an ATM has until the second business day.2eCFR. 12 CFR Part 229 – Availability of Funds and Collection of Checks (Regulation CC) Either way, the funds must be accessible by 9:00 a.m. local time on the day they become available, or whenever teller windows and ATMs open.
Night drop deposits follow the ATM timeline, since no bank employee took the cash from your hand. If a payroll run or vendor payment is riding on the deposit, the counter is the fastest route.
Fees and Monthly Cash Deposit Allowances
Most business checking accounts come with a free monthly cash deposit allowance, and fees start once you exceed it. At Bank of America, basic business accounts allow $5,000 in free cash deposits per statement cycle, and relationship-tier accounts raise that to $20,000. Beyond the allowance, the fee is $0.30 per $100 deposited.3Bank of America. Fees at a Glance Other major banks use a similar structure with different numbers. For a cash-heavy business, comparing those thresholds across banks adds up to real money over a year.
Online-only business banks often don’t accept cash at all because they have no branches. Some partner with retail or ATM networks for cash deposits; many don’t. Check this before opening the account if cash is part of your revenue.
The $10,000 Reporting Threshold
Two separate federal reporting duties kick in at $10,000, and they apply to different parties.
Your Bank Files a Currency Transaction Report
Under the Bank Secrecy Act, your bank must file a Currency Transaction Report for any cash deposit, withdrawal, or exchange exceeding $10,000 in a single business day.4Financial Crimes Enforcement Network. The Bank Secrecy Act The bank also aggregates multiple transactions in the same day, so a $6,000 deposit in the morning and a $5,000 deposit in the afternoon triggers one.5Internal Revenue Service. Bank Secrecy Act The CTR identifies you, your business, and the account, and goes to the Financial Crimes Enforcement Network. The bank handles the filing. You should expect to show ID and provide a taxpayer identification number. The CTR itself is routine paperwork and doesn’t trigger an audit by itself.
You File IRS Form 8300
If your business receives more than $10,000 in cash from a customer in a single transaction or a series of related transactions, you must file IRS Form 8300 within 15 days.6Office of the Law Revision Counsel. 26 USC 6050I – Returns Relating to Cash Received in Trade or Business7Internal Revenue Service. Form 8300 and Reporting Cash Payments of Over $10,000 For Form 8300 purposes, “cash” includes paper currency, foreign currency, certain monetary instruments such as cashier’s checks and money orders with a face value of $10,000 or less, and digital assets.
Penalties are steep. Negligent failure to file carries at least $310 per return, with annual caps in the millions. Intentional disregard raises the penalty to the greater of $31,520 or the amount of cash involved, up to $126,000 per transaction. Willful failure is a felony punishable by up to five years in prison and fines up to $25,000 for individuals or $100,000 for corporations.8Internal Revenue Service. IRS Form 8300 Reference Guide
Why You Should Never Split Deposits to Avoid the Threshold
Breaking a large cash deposit into smaller amounts to stay under $10,000 is called structuring, and it is a federal crime on its own. The money doesn’t have to be dirty. A restaurant owner who deposits $9,500 Monday and $9,500 Wednesday to keep the bank from filing a CTR has committed structuring, even though every dollar came from legal sales.
Banks are trained to spot the pattern. They can file Suspicious Activity Reports on amounts well below $10,000; the SAR threshold is $5,000 when a suspect can be identified, and banks can file voluntarily on any amount they find suspicious.9FFIEC. Suspicious Activity Reporting – BSA/AML Manual Deposits that cluster just under $10,000 are one of the most common triggers.
A structuring conviction carries up to five years in federal prison, a fine, or both. If the structuring is connected to other illegal activity involving more than $100,000 in a twelve-month period, the maximum doubles to ten years and a doubled fine.10Office of the Law Revision Counsel. 31 USC 5324 – Structuring Transactions to Evade Reporting Requirement Civil forfeiture of the funds is also on the table. The paperwork is harmless. Trying to avoid it is what creates the problem.
Depositing Your Own Cash as a Capital Contribution
Owners often put personal cash into the business, especially at startup or during a slow month. You can do this, and the deposit itself is not taxable income to the business. The catch is documentation. The IRS will not take your word that a large cash deposit came from your savings rather than unreported sales.
Record every capital contribution in your books with the date, amount, and source. A short memo such as “owner capital contribution — personal savings” creates the paper trail. For LLCs and partnerships, a capital contribution also increases your basis in the company, which affects how much of the business’s losses you can deduct and what you owe in tax when you sell your interest or leave.
If you operate as an LLC or corporation, keep personal and business funds strictly separate. Moving personal cash through the business account without clear records can give a court grounds to pierce the corporate veil, which costs you the liability protection the entity was supposed to provide. Sole proprietors face less legal risk from commingling because there is no legal separation between the owner and the business, but clean records still matter for tax purposes.
Records the IRS Expects Behind Every Deposit
The IRS expects every cash deposit in a business account to trace back to a source: sales receipts, register tapes, invoices, or a documented capital contribution. The burden sits on you to show that a deposit is not taxable income if they question it.11Internal Revenue Service. Examination of Income When an auditor uses the bank deposits method to reconstruct income, unexplained deposits are presumed taxable.
Your records need to show gross income clearly and tie back to register tapes, deposit slips, invoices, and 1099 forms.12Internal Revenue Service. What Kind of Records Should I Keep A daily habit helps: reconcile the register or point-of-sale total against the cash you deposit. If today’s register shows $2,300 in cash sales and the deposit is $2,300, that consistency is what protects you later.
Retention periods depend on the situation. The general rule is three years from the date you filed the return. Underreport income by more than 25% of gross receipts and the IRS has six years to audit, so keep records that long. A claim for a loss from worthless securities or bad debt stretches retention to seven years. If you never file a return, there is no statute of limitations, and you keep the records indefinitely.13Internal Revenue Service. How Long Should I Keep Records