Payment Processor
A payment processor is the company that handles your card transactions. When a customer taps "Pay," the processor takes the card details, routes them through the card network (Visa, Mastercard) to the customer's bank, gets an approve or decline response, and eventually settles the funds into your bank account.
The term gets used loosely. "Processor" can mean the company that handles the technical routing (the actual processor), the company that holds your merchant account (the acquirer), or an all-in-one platform that does both (Stripe, Square, PayPal). For most small businesses, these are the same company.
Why It Matters
Your processor is the most important vendor in your payment stack. They determine:
| What They Control | Impact |
|---|---|
| Your pricing | How much you pay per transaction (2.6-3.5% is the typical range) |
| Your payout timing | When money hits your bank (1-3 business days, sometimes longer) |
| Your fraud tools | What built-in fraud protection you get |
| Your chargeback experience | How disputes are communicated and managed |
| Your uptime | If they go down, you can't accept payments |
| Your account stability | They can freeze or terminate your account |
Two Models
Bundled (Payment Facilitator / PayFac)
Companies like Stripe, Square, Shopify Payments, and PayPal act as payment facilitators. You sign up in minutes, process under their master merchant account, and they handle everything.
| Pros | Cons |
|---|---|
| Fast setup (minutes, not weeks) | Flat-rate pricing (overpay at higher volume) |
| No underwriting hassle | Less pricing flexibility |
| Built-in fraud tools | Account freezes with little warning |
| Simple dashboard | Limited customization |
Best for: Businesses under $500K/year, businesses that want simplicity, businesses just starting out.
Standalone (Gateway + Merchant Account)
A traditional setup where you have a separate merchant account (from an acquirer like Worldpay, First Data, or your bank) and a payment gateway (like Authorize.net or NMI) that connects them.
| Pros | Cons |
|---|---|
| Interchange-plus pricing | Setup takes days to weeks |
| More stable accounts | Underwriting required |
| Negotiable rates | More vendors to manage |
| Direct relationship with acquirer | More technical complexity |
Best for: Businesses over $500K/year, businesses with high-risk MCCs, businesses that need pricing control.
How to Choose
The right processor depends on your volume and complexity:
| Your Situation | Recommended Path |
|---|---|
| Just starting, under $10K/month | Stripe or Square (fastest setup) |
| E-commerce, $10K-$100K/month | Stripe, Shopify Payments, or PayPal (still simple) |
| Growing, $100K-$500K/month | Start comparing interchange-plus options |
| Over $500K/month | Dedicated merchant account + gateway, negotiate rates |
| High-risk MCC | Specialized high-risk processor (PayKickstart, Durango, etc.) |
| In-person sales | Square or Stripe Terminal (best hardware integration) |
What to Watch For
- Effective rate creep. Calculate your effective rate monthly (total fees / total volume). If it rises without explanation, your processor may have changed pricing or you're getting more downgrades. Anything above 3.0% on card-not-present deserves investigation.
- Reserve holds. Some processors hold a percentage of your sales as a reserve, especially for new or high-risk accounts. Understand the terms before you sign up. A 10% rolling reserve on a $50K month means $5,000 of your money is locked up.
- Termination clauses. Know what can get your account shut down. Common triggers: chargeback ratio over 1%, sudden volume spikes, selling prohibited products. Getting terminated can land you on the MATCH list, which makes it very hard to get a new merchant account for 5 years.
- Payout delays. Standard is 2 business days for most processors. If you're seeing 7+ days consistently, something is wrong. Ask your processor why.
- Support quality. When your payments go down at 8pm on a Friday, can you reach a human? Test this before you need it.
Common Mistakes
- Choosing based on rate alone. The cheapest processor with terrible support or account stability issues will cost you more in the long run. A $25/month savings means nothing if they freeze your account for two weeks.
- Not reading the contract. Early termination fees, minimum monthly fees, PCI non-compliance fees, batch fees, statement fees. Read the fine print or ask your processor to walk through every line item.
- Running too long on flat-rate. Stripe's 2.9% + $0.30 is great for simplicity but expensive at volume. At $50K/month, switching to interchange-plus can save $200-$500/month.
- No backup processor. If your single processor freezes your account or goes down, your business stops taking payments. At $100K+/month, having a secondary processor is worth the setup cost.
See Also
- Buying Payments Guide - End-to-end guide for selecting and onboarding a processor
- Processor Comparison - Side-by-side comparison of major processors
- Processor Fees Guide - Understanding all the fees your processor charges
- Processor Management - Managing the ongoing relationship with your processor
- Holds and Reserves - How processors hold funds and when reserves apply
- MATCH List and TMF - What happens if a processor terminates your account