When a merchant cash advance company installs a lock box on your business, the arrangement is not administrative. It is structural control over your cash flow, built into the contract from the first day of funding.
A lock box is a bank-controlled account, separate from your operating account, through which all incoming receivables pass before you can access them. The MCA funder takes its designated portion first. What remains gets swept to you, usually once per day. The mechanics are seamless from the funder’s perspective, and disorienting from yours.
How the Lock Box Actually Functions
In a split-processing arrangement, the processor intercepts card receipts at the point of sale and diverts the funder’s percentage before the money reaches your account. A lock box works differently. Deposits, whether from cards, ACH transfers, or wire payments, land in a dedicated account that the funder controls or co-controls. The funder’s share is extracted automatically, and the residual is released to you.
The practical effect is that your bank account never sees the full transaction amount. By the time money arrives in your operating account, the funder has already collected. You cannot spend what has not arrived.
The Contract Creates the Right to Control
Lock box authority derives from language in the purchase and sale agreement itself, not from any court order or judgment. The contract grants the funder either direct account access or a security interest that permits it to direct deposits and intercept funds. Most business owners do not read this section carefully at signing. By the time the lock box is operational, the right to challenge the mechanism is already circumscribed by the agreement.
This is not necessarily unlawful. Courts in New York and elsewhere have repeatedly enforced lock box provisions as part of legitimate receivables purchase agreements. The question is not whether the mechanism exists, but whether the funder is operating within the boundaries the contract actually establishes.
Fees Associated With the Account
Lock box accounts frequently carry maintenance charges that appear nowhere in the factor rate calculation. Monthly fees ranging from forty to seventy-five dollars are common. Some agreements include wire transfer fees each time a sweep occurs, which in a daily-debit arrangement can accumulate across a funding term. These charges reduce the effective amount you receive without adjusting the amount owed.
The factor rate governs what you owe. The lock box fee schedule governs what it costs you to receive what remains after the funder collects.
Read both documents.
What Happens When Revenue Drops
A properly structured MCA should respond to revenue fluctuations. If the lock box is calibrated to a percentage of deposits, a slow month should produce smaller absolute deductions. The problem arises when the contract uses fixed daily amounts disguised as percentage-based language, or when the reconciliation mechanism the contract promises is never actually applied in practice.
A 2024 enforcement action in the Southern District of New York found that at least one major funder continued debiting fixed amounts from lock box accounts despite contractual reconciliation triggers, treating a purported purchase-of-receivables agreement as an installment loan in everything but name.
Your Right to Inspect the Account
You have a right to obtain account statements for any lock box tied to your business. The funder does not own your revenue stream in perpetuity. It holds a conditional interest in future receivables, limited by the amount purchased and the term of the agreement. If you cannot obtain statements showing deposit totals, deductions taken, and balances released, that absence of documentation is itself a basis for dispute.
Request them in writing. Keep the request.
The Reconciliation Right You May Not Know You Have
Many MCA contracts contain reconciliation provisions that require the funder to true-up deductions against actual receivables on a periodic basis, monthly in some agreements, quarterly in others. In a lock box structure, this right is harder to enforce because the funder controls the data. The funder knows what came in. You only know what came out.
Reconciliation claims require you to produce your own deposit records, often from a secondary account that received the lock box distributions, and compare them against the funder’s stated receipts. Discrepancies are not rare. Whether they reflect error or design depends on the pattern.
When the Lock Box Becomes Leverage
The funder’s control over the lock box converts a payment mechanism into a negotiating position. If you fall behind, the funder can simply allow the lock box to continue operating while your operating account receives diminishing distributions. No lawsuit is needed to maintain pressure. The cash flow restriction functions as continuous collection activity.
This dynamic is why legal intervention is most effective before the lock box depletes your operating capital entirely, not after. An attorney can challenge the validity of the lock box arrangement, contest the calculation methodology, or seek emergency relief if the funder has exceeded its contractual authority. Waiting until the account is exhausted narrows those options considerably.
If a lock box is restricting your cash flow in ways that do not align with your contract, a consultation is where this conversation begins. The arrangement is not immovable. Whether it can be modified, terminated, or challenged depends on what your specific agreement actually says, and what the funder has actually done.
