Understanding Payment Processing Fees
This is the guided learning path version. For advanced fee analysis, see Processor Fees Guide (hidden fees and statement auditing) and Interchange Optimization (qualifying for lower rates).
Payment processing fees can be confusing. Here's what you actually need to know.
On a $100 sale, you'll pay roughly $3.20 in fees with most providers. About $2.20 goes to banks and card networks (you can't change this), and about $1.00 goes to your processor (you can negotiate this at volume).
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Where Your Fees Go
Here's a real example of a $100 Visa credit card transaction:
| Component | Amount | Who Gets It | Can You Negotiate? |
|---|---|---|---|
| Interchange | ~$1.80 | Customer's bank (Chase, Citi, etc.) | No |
| Assessment | ~$0.14 | Card network (Visa, Mastercard) | No |
| Processor Markup | ~$1.26 | Your processor (Stripe, Square, etc.) | Yes, at volume |
| Total | ~$3.20 |
Rates vary by card type, transaction type, and your pricing model.
A note on American Express: Amex cards typically cost 0.3-0.5% more than Visa/Mastercard because Amex acts as both the network and the issuer.
The Three Components Explained
- Interchange Fee: This is the largest portion of the fee, and it goes to the bank that issued the customer's card (the issuer). This is the price you pay for the customer's bank taking on the risk that the charge is legitimate and the customer will pay their bill. Interchange rates are set by the card networks (Visa, Mastercard, etc.) and are non-negotiable.
- Assessment Fee: This is a smaller fee that goes to the card network itself (Visa, Mastercard, etc.). Visa and Mastercard charge this for running the network that connects all the banks. Like interchange fees, these are non-negotiable.
- Processor Markup: This is the fee that your payment processor charges for their services. This is your processor's revenue for the software, fraud protection, support, and infrastructure you use. This is the only part of the fee that is negotiable.
How Pricing Models Affect Your Fees
On flat-rate pricing (Stripe, Square, PayPal)? You pay one rate on every transaction. Skip to When Should You Care.
- Flat-rate: With this model, you don't see the individual components of the fee. The processor bundles everything into a single rate (e.g., 2.9% + $0.30). This is simple and predictable, but you may be overpaying for some transactions. See our processor comparison for examples.
- Interchange-plus: This is the most transparent pricing model. You pay the actual interchange and assessment fees for each transaction, plus a fixed markup from your processor. This allows you to see exactly what you're paying and to whom.
- Tiered: This model groups transactions into tiers (e.g., "qualified," "mid-qualified," "non-qualified"). Each tier has a different rate. This is the least transparent model, and it's often difficult to know why a transaction was placed in a particular tier. For most businesses at scale, this is the worst option.
When Should You Care About This?
| Your Monthly Volume | What to Do |
|---|---|
| Under $10K | Don't optimize. Use flat-rate pricing and focus on growing your business. |
| $10K - $50K | Ask your processor about volume discounts. A simple email can save you 0.1-0.2%. |
| $50K - $100K | Consider switching to interchange-plus pricing. Run the math first. |
| Over $100K | Negotiate hard. Every 0.1% saved is $100+/month in your pocket. |
Reading Your Statement
Here's the fastest way to check if you're overpaying:
- Log into your processor dashboard
- Find last month's total sales and total fees
- Divide fees by sales. That's your effective rate
- Healthy range for most small businesses: 2.5-3.2%
If your effective rate is above 3.5%, you're likely overpaying. Email your processor and ask for a rate review, or compare your rate against current pricing in the Processor Comparison.
Some processors bury extra fees in your statement. Common ones to look for:
- PCI non-compliance fee: $10-150/month (varies by processor) if you haven't completed your annual PCI (the security standard for handling card data) questionnaire
- Monthly minimum fee: $25/month if your processing volume is too low
- Statement fee: $5-10/month for mailing a paper statement
These fees are common with traditional processors. Stripe, Square, and PayPal don't charge them.
If you're on a flat-rate plan (Stripe, Square), your statement will be simple. If you're on interchange-plus or tiered, request a detailed breakdown if it's not provided. For help reconciling, see settlement and reconciliation.
Your First Week Action
Log into your processor dashboard and find your effective rate (total fees divided by total sales). Write it down. You'll use this number to decide when it's worth optimizing.
You've Completed the Payments Basics
You now understand:
- The players in the payments ecosystem
- How to choose a payment processor
- The different types of payment processing fees
Next Steps
Come back to these after finishing The Guide: