Complete Guide to Merchant Account Fees

Payment processing fees are confusing by design. Understanding the fee structure saves thousands per year. Here is every fee explained.

The Three Types of Fees

1. Interchange Fees (Non-Negotiable)

Set by card networks (Visa, Mastercard). Paid to the card-issuing bank. Typically 1.5-2.5% of transaction. These are fixed - no processor can lower them.

2. Assessment Fees (Non-Negotiable)

Charged by card networks (Visa, Mastercard, Amex, Discover). Small percentage (0.13-0.15%) plus a per-transaction fee. Also fixed.

3. Processor Markup (Negotiable)

This is what your payment processor adds on top. The ONLY part you can negotiate. Ranges from 0.1% to 1.5% depending on your processor and volume.

Pricing Models

Flat-Rate (Square, Stripe, PayPal)

One rate for everything: 2.6-3.5% + $0.10-$0.30. Simple but expensive for high-volume businesses. Best for under $10K/month.

Interchange-Plus (Helcim, Stax)

Interchange + fixed markup. Example: Interchange + 0.3% + $0.08. Most transparent and usually cheapest for $10K+/month.

Tiered (Traditional Merchant Accounts)

Transactions sorted into qualified, mid-qualified, and non-qualified tiers. Opaque and usually most expensive. Avoid if possible.

Subscription (Stax, Payment Depot)

Monthly fee ($99-199) + interchange + small per-transaction fee ($0.08-$0.15). Best value for $20K+/month in processing.

Hidden Fees to Watch

How to Calculate Your Effective Rate

Effective rate = Total fees paid / Total processing volume

If you processed $50,000 and paid $1,750 in total fees: 1,750 / 50,000 = 3.5%

A healthy effective rate is 2.5-3.0% for card-present and 2.8-3.3% for card-not-present transactions. If yours exceeds these ranges, you are overpaying.