Payment gateway fees are not one number — they stack

A payment gateway charges you in layers. The most visible is the transaction fee, usually between 2.2% and 3.5% of each sale plus a flat amount per transaction (often $0.30). But that is only one piece. You may also pay a monthly gateway fee (ranging from nothing to $30 or more), fees for failed transactions, fees for refunds, and fees for chargebacks when a customer disputes a charge.

The total cost depends on your business type, your sales volume, your industry, and which gateway you choose. A coffee shop processing $5,000 a month in small card transactions pays a different percentage than an online retailer processing $50,000 in larger orders. Understanding which fees explore to you means looking at your actual transaction patterns, not just the advertised rate.

Key Takeaways

  • Transaction fees — the percentage plus per-transaction flat fee — are the largest cost for most businesses, and they vary based on how customers pay (card, digital wallet, ACH transfer).
  • Monthly gateway fees, failed transaction fees, and chargeback fees add to your total cost and are straightforward to overlook when comparing providers.
  • Interchange fees (what the card networks charge) are built into the transaction percentage and vary by card type, so a Visa debit card costs less than an American Express corporate card.
  • Your actual cost per transaction depends on your sales mix — a business with many small sales pays more as a percentage of revenue than one with fewer large sales.

Transaction fees: the main charge you see on every sale

Every time a customer pays through your gateway, you pay a transaction fee. This fee has two parts: a percentage of the sale amount, and a flat per-transaction charge. A typical rate might be 2.9% + $0.30, meaning a $100 sale costs you $3.20 in fees.

The percentage varies. Stripe, Square, and PayPal all publish their standard rates, but they differ slightly — Stripe's online rate is 2.9% + $0.30, while Square's is the same, and PayPal's is 2.99% + $0.30. These are the baseline rates for standard credit and debit cards. The rate you actually pay depends on your business category, your sales volume, and your processing history. A restaurant or retail store may pay a different rate than a software company or nonprofit.

The percentage also changes based on the card type. A customer paying with a Visa or Mastercard debit card triggers a lower interchange fee (the portion that goes to the card issuer) than a customer paying with an American Express or a rewards credit card. You do not see this broken out on your invoice — it is bundled into the transaction percentage — but it means your actual cost varies transaction by transaction.

Monthly gateway fees and other recurring charges

Beyond transaction fees, many gateways charge a monthly fee just to use the service. This can range from $0 (some gateways waive it for low-volume sellers) to $30 or more per month. Stripe does not charge a monthly fee. Square does not charge a monthly fee for basic use. PayPal does not charge a monthly fee. But some enterprise gateways or specialized processors do, and some gateways charge a monthly fee only if you process below a certain volume.

You may also encounter fees for transactions that fail — a card declined, a payment that times out, or a customer who cancels mid-transaction. Some gateways charge $0.05 to $0.10 per failed attempt; others do not charge at all. If you process refunds, some gateways charge a small fee per refund, while others include refunds in your transaction fee. Chargebacks — when a customer disputes a charge with their bank — typically cost $15 to $100 per chargeback, depending on the processor.

How your business type affects what you pay

Payment processors categorize businesses by industry, and each category has different risk profiles and therefore different rates. A grocery store, a software-as-a-service company, and a travel agency all process payments differently and face different fraud risks, so they pay different percentages.

High-risk categories — like adult services, gambling, or cryptocurrency — pay significantly higher rates, sometimes 5% to 10% or more. Even within lower-risk categories, your history matters. A new business with no processing history may pay higher rates than an established business with a clean record. If you have a high chargeback rate (more than 1% of transactions disputed), your processor may raise your rate or require you to use additional fraud prevention tools, which cost extra.

Volume discounts and tiered pricing

If you process a high volume of transactions, you can negotiate lower rates. Stripe, Square, and PayPal do not typically offer volume discounts on their published rates — they charge the same percentage whether you process $1,000 or $1 million a month. But if you work with a dedicated merchant services provider or processor, volume discounts are common. A business processing $100,000 per month may may have access to for a rate of 2.5% + $0.25, while a smaller business pays 2.9% + $0.30.

Some gateways use tiered pricing, where your rate changes based on how much you process in a given month. You might pay 2.9% on your first $10,000, then 2.7% on the next $40,000, then 2.5% on anything above that. This structure rewards higher volume but can make your costs harder to predict month to month.

Payment method differences: cards, wallets, and bank transfers

Not all payment methods cost the same. A customer paying with a credit card triggers the transaction fee discussed above. A customer paying with a digital wallet like Apple Pay or Google Pay usually costs the same as a card payment, because the wallet is just a way of transmitting card information. But a customer paying by ACH bank transfer (direct from their bank account) typically costs less — often 1% + $0.25 or even a flat $0.25 per transaction.

This means your total processing cost depends on your payment mix. A business where 80% of customers pay by card and 20% pay by ACH will have a lower average cost per transaction than a business where 95% pay by card. If you want to encourage lower-cost payment methods, you can offer a discount for ACH or bank transfer payments, though you cannot charge a surcharge for credit card use in most states.

How to compare what different gateways actually cost you

To compare gateways honestly, you need to know your own transaction patterns. Pull your last three months of sales data and note: your average transaction size, the percentage of sales by card type (debit, Visa, Mastercard, American Express), the percentage of sales by payment method (card, wallet, ACH), and your current chargeback rate if you have one.

Then calculate the total cost for each gateway using your actual mix. A gateway that charges 2.9% + $0.30 per transaction costs you $29 on a $1,000 sale, but $2.90 on a $100 sale. If your average sale is $50, that same rate costs you $1.75 per transaction — 3.5% of the sale. If your average sale is $500, it costs you $14.90 — 2.98% of the sale. The published rate does not tell you what you will actually pay.

Most gateways publish their rates on their pricing page, and many offer a cost calculator where you can enter your expected monthly volume and average transaction size. Use it. Then add any monthly fees, failed transaction fees, and chargeback fees to get a true picture of your total cost.

Frequently Asked Questions

Why do different card types cost different amounts?

Card networks and banks set interchange fees — the portion of your transaction fee that goes to the card issuer and network — based on card type and risk. A debit card has lower interchange than a rewards credit card because the bank takes on less risk and the cardholder gets fewer benefits. Your gateway bundles all these fees into one percentage, so you do not see the breakdown, but your cost per transaction varies based on what card the customer uses.

Can I negotiate a lower rate with my payment processor?

It depends on the processor and your volume. Stripe, Square, and PayPal do not negotiate their published rates. Dedicated merchant services providers and some larger processors do negotiate, especially if you process $50,000 or more per month. If you are considering switching processors, you can ask for a custom quote, but expect the negotiation to focus on volume and chargeback history, not just on asking for a discount.

What is a chargeback fee, and how do I avoid it?

A chargeback happens when a customer disputes a charge with their bank instead of asking you for a refund. The bank reverses the transaction and charges you a fee — typically $15 to $100 — plus you lose the sale amount. To avoid chargebacks, keep clear records of what you sold, use clear billing descriptors so customers recognize the charge, and respond quickly to customer disputes before they escalate to chargebacks.

Do I pay transaction fees on refunds?

Most gateways do not charge a transaction fee on refunds — you get the original transaction fee back. But some processors charge a small refund fee. Check your processor's refund policy before you sign up, especially if you expect a high refund rate.

Is there a payment gateway with no fees?

No legitimate payment gateway charges zero fees. Processing payments costs money — the card networks, banks, and fraud prevention all have costs that the processor passes along. If a gateway claims to have no fees, read the fine print carefully. They may charge fees in a different form, or they may be a different kind of service altogether (like a peer-to-peer payment app, which is not designed for business use).