You opened a merchant account and the salesperson walked you through the rate. You may have asked about statement fees, PCI fees, even early termination fees. But unless you specifically asked about a monthly minimum, it probably never came up.

That's by design. And it can cost you hundreds of dollars a year on a business you didn't even process.

What a monthly minimum actually is

A monthly minimum is a floor on the processing fees your processor will collect from you each month. It's most commonly set at $25, though some processors go as high as $50 or as low as $10.

Here's how it works:

  • Your rate produces some amount of processing fees each month based on your volume
  • If those fees come in below the minimum, the processor charges you the difference
  • If they come in above the minimum, the minimum doesn't apply

So if your minimum is $25 and you only process enough in February to generate $8 in fees, your processor bills you an extra $17 to make up the gap. The bill line usually reads "Discount Shortfall" or "Monthly Minimum Fee."

Who it hurts

Monthly minimums were originally created as a hedge against processors losing money on dormant accounts — essentially, a way to guarantee a minimum profit per customer. But the merchants who actually trigger them are almost always the ones who can least afford them:

  • Seasonal businesses — landscapers, holiday retailers, pool services, event vendors
  • Part-time or side-hustle merchants who don't run sales every month
  • New businesses that haven't ramped up yet
  • Businesses that got quiet during a slow stretch and didn't realize the fee was kicking in

If you do $10,000 a month in sales, the minimum is invisible — you blow past it every month. If you do $500 one month because your oven broke, you're paying full price.

How to find out if you have one

Your merchant agreement has it in writing, usually under "Fees" or "Processing Charges," sometimes buried in a separate rate schedule. If you can't find your agreement, look at a statement from a slow month — if there's a line item called "Monthly Minimum," "Discount Shortfall," or "Minimum Processing Fee," you have one.

A quick estimate: take your monthly fees over the last 12 months and find the lowest one. If any month shows fees that look suspiciously round (exactly $25, exactly $30), that's probably the minimum biting.

How to negotiate it away

Monthly minimums are one of the easiest fees to get removed, because they don't cost the processor anything to drop for active accounts. Your leverage:

  • If you're a healthy account (consistent volume, low chargebacks), ask your rep to waive the minimum. Many will agree on the spot.
  • If you're seasonal, ask for the minimum to be waived during your off-season months specifically. Some processors have an explicit seasonal provision.
  • If you're new to processing, ask for a 6-month waiver while you ramp.
  • If you're shopping a new account, make "no monthly minimum" a requirement before you sign anything.

The magic phrase is: "I need this fee removed before I can move forward." If the rep says no, escalate. If the processor says no, shop.

The bigger picture

The monthly minimum is a perfect example of a fee that looks tiny in isolation but compounds over time. Twenty-five dollars a month doesn't sound like much — but that's $300 a year in a fee that grows when your business shrinks. You're paying more when you can afford it least.

Worse, it's almost never disclosed up front. In a well-run sales process, a rep would tell you the floor exists. In practice, you'll find out about it the first time you have a slow month — and by then, it's too late.

Check your statement today. You might be paying for air.