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You missed a payment on your merchant cash advance. Maybe your account was short. Maybe you blocked the ACH on purpose. Doesn't matter. What matters is what happens next, because the NSF fees from an MCA aren't like an overdraft on your debit card. They're a compounding financial event that most business owners don't see coming until they're $2,000 deep in fees they didn't budget for.
Short answer: Every time your MCA lender's daily ACH debit gets returned by your bank, you get hit twice. Once from your bank (the NSF fee), and once from the lender (the returned payment fee). And most lenders will retry that debit two or three times before they stop. That means a single missed daily payment can trigger $100 to $200 in fees, in 48 hours, before anyone even picks up the phone to call you.
1How MCA NSF fees actually work
Here's what most people don't understand. Your MCA lender pulls a daily ACH debit from your business bank account. That's the remittance. When there's not enough money in the account to cover it, your bank returns it as an NSF (non-sufficient funds). Your bank charges you somewhere between $25 and $35 for that. Standard.
But the lender also charges you. Most MCA agreements include a returned payment fee, sometimes called a "failed ACH fee" or "dishonored payment fee." That fee is usually $25 to $50 per occurrence. Some funders charge more. And here's the part that kills you — the lender doesn't just try once and walk away. They retry.
2The retry problem
Most MCA funders will retry a failed ACH debit two to three times after the initial return. Each retry that bounces triggers another NSF fee from your bank, and another returned payment fee from the lender. So let's do the math on one missed day:
First attempt fails: $35 bank NSF + $35 lender fee = $70
Second attempt fails: $35 bank NSF + $35 lender fee = $70
Third attempt fails: $35 bank NSF + $35 lender fee = $70
That's $210 in fees from a single day's missed payment. And that's using conservative numbers. Some banks charge $38 per NSF. Some lenders charge $50 per returned payment. You do the math on a week of missed payments and you're looking at over $1,000 in fees alone, before anyone's even talked about the actual balance you owe.
3Why your bank won't protect you
A lot of business owners assume their bank will stop the retries. This is wrong. Your bank processes every ACH debit that comes through, and if it bounces, they charge the NSF fee regardless of how many times the same lender retries. They don't flag it. They don't call you. They just process and charge.
Some banks offer "overdraft protection" that covers the debit — but that just means you're now borrowing from your credit line to pay the MCA, which is its own disaster. And if you don't have overdraft protection, every single retry is another $35 hit to an account that's already short.
4The fees you don't see in your MCA agreement
Here's where it gets worse. Most MCA agreements have a provision that says all fees, penalties, and costs incurred as a result of default (including attorney fees) get added to the outstanding balance. That means those NSF-related fees aren't just charges on your bank statement. They're getting stacked on top of what you already owe the funder. Your balance is growing while your cash flow is shrinking. That's the trap.
Some funders also charge a "default fee" or "acceleration fee" that's separate from the returned payment fees. This can be a flat amount ($500 to $2,500) or a percentage of the remaining purchased amount. It gets triggered the moment the funder classifies you as in default, which can happen after as few as three consecutive missed payments. Sometimes less.
5Can you stop the ACH debits?
Technically, yes. You can issue an ACH revocation through your bank, or you can close the account entirely. But — and this is critical — doing either of those things is almost certainly a default event under your MCA agreement. You're not stopping fees, you're escalating the situation. The lender will treat it as a deliberate breach, accelerate the full balance, and likely move to legal action faster than they would have if you'd just been short on cash.
If you're considering blocking the ACH, you need to understand what you're triggering. It's not a pause button. It's an ejection seat.
6What to do if NSF fees are stacking up
If you're already in the cycle — daily debits bouncing, fees piling up, balance growing — here's the reality. You're not going to math your way out of this. The fee structure is designed to create urgency, and it works. Every day you wait, the number gets bigger.
Your options at this point are negotiation or intervention. You either get the funder to agree to a modified payment schedule (which most won't do voluntarily), or you get someone in between you and the funder who can force a conversation about the real numbers. Not the inflated ones. Not the ones with $3,000 in junk fees stacked on top.
The NSF fees are the first domino. What comes after — collections, UCC enforcement, lawsuits, confession of judgment filings, bank account freezes — is significantly worse. If the fees are already adding up, that's your signal. Not your grace period.