The Beginner's Guide to Credit Card Processing

By GoPayhawk Editorial Team  ·  Reviewed by Travis Lastra  ·  January 1, 2023

If you're accepting card payments for the first time — or trying to understand what your current processor is actually doing — this guide covers everything you need to know: how the money moves, what you'll pay, what hardware you need, and what contract terms to avoid before you sign.

What Is Credit Card Processing?

Credit card processing is the system that enables your business to accept card payments and receive the funds in your bank account. When a customer pays with a Visa, Mastercard, Amex, or Discover card, a series of near-instant transactions moves their money to you — facilitated by your processor, the card network, and both banks involved.

Three parties are always involved in every card transaction:

• The acquiring bank (your bank): Holds your merchant account and deposits your settled funds into your business checking account.
• The card network (Visa, Mastercard, Amex, Discover): Sets the interchange rates and rules that govern all transactions on their network.
• The issuing bank (your customer's bank): Issued the card to your customer, approves or declines the transaction, and ultimately funds the payment.

Your payment processor sits in the middle — routing encrypted data between your terminal or gateway and these three parties, managing security standards, and depositing your funds on a predictable schedule.

How Does a Card Transaction Work?

Every card transaction has two phases: authorization and settlement.

Authorization happens in under three seconds:

1. Customer swipes, dips, taps, or enters their card details online
2. Your terminal or gateway encrypts the data and sends it to your processor
3. Your processor routes it to the card network (Visa, Mastercard, etc.)
4. The card network forwards it to the issuing bank for approval
5. The issuing bank verifies the card, checks available funds, and returns an approval or decline code
6. The result is returned to your terminal — sale completes or is declined

Settlement is the second phase — this is when you actually get paid. At the end of each business day (or at a scheduled batch time), your terminal or gateway submits all authorized transactions as a batch. The processor sends this batch to each card network, which debits the issuing banks and credits your acquiring bank. Funds typically arrive in your business checking account within 24–48 hours. GoPayhawk offers next-day funding on most transactions, so you're not waiting days to access your revenue.

What Equipment Do You Need?

The hardware you need depends on where and how your customers pay you. There is no single right answer — the best setup for a coffee shop is different from the best setup for a roofing contractor.

In-Person Transactions

Most brick-and-mortar businesses need a card terminal or point-of-sale (POS) system. At minimum, your device should read:

• EMV chip cards — the standard since 2015. If you only accept magnetic stripe and a chip card is used fraudulently, the liability shifts to you, not the issuing bank.
• NFC / contactless payments — Apple Pay, Google Pay, Samsung Pay, and tap-to-pay cards. Contactless is now the majority of in-person transactions at many retailers.
• Magnetic stripe — still used by some older and international cards as a fallback.

GoPayhawk's terminal lineup includes compact Android countertop terminals for retail, dual-screen devices for face-to-face checkout, and pocket mPOS units for mobile service providers who work at job sites or customer locations. See our full terminal and POS guide for a hardware comparison by business type.

Online Transactions

E-commerce businesses need a payment gateway — software that encrypts card data and routes it to your processor without the data ever touching your server directly. Most gateways integrate directly with your website's shopping cart or checkout form. GoPayhawk supports leading gateway integrations; see our integrations page for a full list.

Mobile and Field Transactions

If you work at job sites, farmers markets, pop-up events, or anywhere without a fixed counter, a mobile card reader that pairs with your smartphone handles both EMV and contactless acceptance without a dedicated terminal.

Virtual Terminal

A virtual terminal is a web-based interface that lets you manually key in card numbers — useful for phone orders, recurring billing, or invoicing situations where the card is not physically present. No hardware required. Keep in mind that card-not-present transactions typically carry slightly higher interchange rates because the fraud risk is higher.

What Is a Merchant Account?

A merchant account is a specialized bank account that temporarily holds your card payment funds before they are deposited into your regular business checking account. It is not the same as your business checking account — it is an intermediate holding account managed by your acquiring bank, sitting between the card networks and your operating account.

Here is the relationship step by step:

1. A customer pays you with a card
2. After authorization, funds settle into your merchant account (held by the acquiring bank)
3. Your processor batches those funds and transfers them to your business checking account — typically next business day with GoPayhawk

Some processors — Square, PayPal, Stripe — combine the merchant account and processing into a single product called a payment facilitator (PayFac). This simplifies onboarding but usually means flat-rate pricing that becomes expensive as volume grows. With a dedicated merchant account through a processor like GoPayhawk, you get interchange-plus pricing, more control over your funds, and typically lower effective rates at any meaningful volume.

To open a merchant account, you generally need:

• Business name, address, and EIN (or SSN for sole proprietors)
• Business bank account and routing number
• Three months of recent bank statements
• Processing history, if you have accepted cards before
• Government-issued ID for the business owner

GoPayhawk approvals typically take 24–48 hours. If your industry is considered higher risk — nutraceuticals, travel, subscription services, firearms — you may need a specialized merchant account. See our high-risk processing page for details.

For a deeper dive, read our full explainer: What is a merchant account?

How Much Does Credit Card Processing Cost?

Processing fees have three components that combine to form your effective rate (total fees divided by total volume):

• Interchange fees: Set by the card networks, paid to the customer's issuing bank. Non-negotiable and the same for all processors. Rates vary by card type, industry, and acceptance method. A basic debit card run as credit might cost 0.05% + $0.22; a premium rewards card might cost 2.10% + $0.10.
• Assessment fees: A small percentage charged by the card network itself (Visa, Mastercard, etc.) — typically 0.13–0.15%. These are published by the card networks and are non-negotiable.
• Processor markup: The fee your processor charges on top of interchange and assessments. This is where pricing models differ and where you have the most control.

Here is how the five main pricing models compare for a new business owner:

For most new merchants, interchange-plus is the default recommendation — it is transparent, scales well, and protects you from hidden markups. Once you have volume history, cash discounting or dual pricing can eliminate processing fees entirely. See our full pricing model breakdown to compare side by side.

To find out what model and rate is right for your business specifically, request a free statement analysis — if you are already processing, we will show you your current effective rate and where any excess is going.

What Happens If a Customer Disputes a Charge?

A chargeback occurs when a customer contacts their bank to dispute a charge rather than coming to you directly. The bank reverses the transaction, pulling the funds from your merchant account, and gives you a window — typically 20 to 45 days depending on the card network — to provide evidence that the charge was legitimate.

Why chargebacks matter more than most new merchants realize:

• Each chargeback typically costs $15–$50 in fees on top of the reversed transaction amount
• If your chargeback ratio exceeds 1% of monthly transactions, Visa and Mastercard can place you in a monitoring program — or terminate your merchant account entirely
• Some industries are structurally higher-risk for chargebacks: subscription services, e-commerce, high-ticket items, and anything with delayed delivery

The most common causes of chargebacks:

1. Friendly fraud — Customer does not recognize the charge on their statement (often because your statement descriptor is unclear)
2. Item not received or not as described — Fulfillment failures or quality disputes
3. Unauthorized transaction — True fraud; card was stolen or compromised
4. Subscription cancellations — Customer thought they had cancelled but was still billed

The best preventive measures are also the simplest: use a recognizable statement descriptor (the business name that appears on your customer's card statement), issue receipts for every transaction, maintain a clearly visible refund policy, and respond to customer complaints before they escalate to a dispute. GoPayhawk's chargeback protection service monitors your account and sends alerts early in the dispute cycle so you can respond in time.

For a complete breakdown of chargeback rules, timelines, and dispute strategies, see our full guide: Everything you need to know about chargeback fees.

Benefits of Accepting Credit Cards

For any business that is on the fence about the cost versus the benefit, consider what you give up by not accepting cards:

• Higher average transaction values — customers spend more when they are not limited by the cash they happen to be carrying
• Faster checkout — no change-making, no check-writing, no waiting for a customer to find exact bills
• Access to transaction data — card processing statements give you real volume data for planning, forecasting, and tax prep
• Competitive advantage — a cash-only business in 2026 is an immediate red flag to most customers
• Meets customer preferences — most consumers prefer to pay by card or mobile wallet, particularly for purchases over $20

Even if you are a solo service provider or a new startup, accepting cards from day one removes a friction point that costs you real revenue.

Tips for Reducing Processing Costs

• Choose interchange-plus pricing — the most transparent model. Once you have a few months of history, see 6 proven ways to reduce your processing fees.
• Review your merchant statement monthly — know your effective rate, and flag any new line items that appear unexplained
• Avoid long-term contracts with early termination fees — month-to-month terms with no cancellation penalty are standard with reputable processors
• Ask about PCI compliance support — non-compliance fees (often $20–$50/month) are entirely avoidable
• Request a free statement analysis to benchmark your current rate against what you should be paying

Common Myths Debunked

Myth: Small businesses need large accounts to get good rates.
Reality: GoPayhawk works with businesses at every volume level — and interchange-plus pricing benefits smaller merchants proportionally the same as large ones.

Myth: Fees are excessive and unavoidable.
Reality: With the right pricing model, most merchants pay an effective rate under 2.2%. Many GoPayhawk merchants save significantly more versus their prior provider after a statement review.

Myth: Setting up card processing is complicated.
Reality: GoPayhawk handles the setup. Approval and activation typically takes 24 hours. Most new merchants are processing transactions within one business day of applying.

Myth: You need to sign a long-term contract.
Reality: Reputable processors offer month-to-month terms with no cancellation fees. If your processor requires a 1–3 year commitment with early termination penalties, that is not an industry standard — it is a red flag.

Myth: Square is good enough for any business.
Reality: Square works well for very low volume, but its flat per-transaction fee structure becomes expensive as you grow. See why small businesses should reconsider Square before committing.

Choosing the Right Processor

If any term in this guide is still unfamiliar, our payment processing glossary defines every key concept in plain English.

Evaluate any processor against these six criteria before signing anything:

• Pricing transparency: Can they show you your full fee schedule in writing, including the exact markup over interchange?
• Contract terms: Month-to-month with no early termination fee, or locked in for years?
• Support: 24/7 live support with a dedicated account manager — not a 1-800 number call center?
• Security: PCI compliance support included at no additional monthly charge?
• Integrations: Compatible with your existing accounting, POS, or e-commerce software?
• Hardware: EMV chip and NFC contactless ready on all equipment?

Frequently Asked Questions