What card processors say they charge, read from their own pricing pages.

Choosing a processor

What a Credit Card Processing Setup Includes: Before you compare plans, learn the two pieces Authorize.net's pages describe and the fees each one carries.
Stripe vs Square Processing Fees: Two fee schedules, read straight off each company's own pricing page. Here is where they line up and where they part ways in structure.
Clover vs Square vs Stripe on Getting Paid: How fast each one says your card money reaches the bank, what faster access costs, and what each page leaves out.
Square vs Stripe for Small Business: Fees Compared: A side-by-side read of what Square's own pricing page and Stripe's own pricing page say about plans, rates, and features, so you can weigh each against your own sales.
Square Up vs Stripe: What Each Pricing Page Says: One company built its sheet around the counter, the other around the website. Here is what each says it charges and includes, with no winner picked.

Fees beyond the rate

What Stripe Charges for Subscription Payments: Stripe's page lists a card fee plus a separate Billing fee for recurring charges. Here is what each line says, and what to check before you sign up.
Does Stripe Charge a Monthly Fee?: Stripe's own pricing page says no monthly fee on its standard plan. Here is what a month of Stripe billing holds instead, and how other processors' pages differ.
What Stripe's Pricing Page Says About API Fees: A plain-English read of Stripe's own pricing page: what each successful charge costs through its API, and what it does not charge.
What American Express Card Fees Cost Your Shop: Square's page prices Amex like its other major cards, and each processor publishes its own rates.
What Stripe's Pricing Page Says About Radar Fees: Stripe's fraud protection has a built-in layer and a Fraud Teams tier priced separately. Here is what the company's own pricing page says about each.
What Stripe Checkout Fees Depend On: Stripe's pricing page does not publish one checkout rate. The fee rides on how the customer pays and which pricing plan you are on.
What Stripe Terminal Fees Look Like on the Page: Stripe's pricing page spells out the rate for in-person card payments, plus Tap to Pay, encryption and refund rules. Here is what it says.
What Stripe's Own Pricing Page Says It Charges: Stripe platform fees, in plain words: the pay-as-you-go card rates for online, in-person and keyed-in sales, plus the add-ons that cost extra.
What Stripe Charges for Tap to Pay on a Phone: Stripe's own pricing page describes Tap to Pay and lists its in-person card rate. Here is what it says, rate by rate.
What Stripe Charges When a Customer Pays Amex: Stripe's pricing page lists card rates, not network rates. Here is what it says an American Express charge costs and when you pay more.
What Stripe Charges for a Payment Link: A payment link is just a Stripe payment under another name. Here is what Stripe's own pricing page says you pay when a customer clicks one.
What Stripe Charges for Bank Transfers: Stripe's own pricing page spells out its bank transfer fee, the cap on it, and the refund rule that catches some shops off guard. Here is what it says.
What Stripe Charges to Move Your Money: Taking a payment and getting paid out are two different costs on Stripe's sheet. Here is what its own pricing page says about each.
What Stripe Keeps When You Refund a Charge: Refunding a sale on Stripe does not always return every fee you paid. Here is what Stripe's own pricing page says comes back and what stays gone.
What Stripe Invoicing Fees Cost Your Business: Stripe Invoicing stacks two fees: a plan fee per paid invoice and the card processing fee. Here is what Stripe's own pricing page says each one costs.
What Stripe's Pricing Page Says About Connect Fees: A platform or marketplace that wants to take payments for other sellers will see Connect on Stripe's pricing page. Here is what that page states, line by line.
What Stripe Charges for Card Processing: A plain read of Stripe's own pricing page: the per-sale rates, the add-ons for keyed and foreign cards, and what it says it never charges.
What a Square Online Store Really Costs Each Month: Square Online store fees come in two parts: a monthly plan fee and a processing fee on each payment. Here is what Square's own pricing page says about both.
What Square Charges When a Gift Card Is Used: Square's own pricing page says no extra fee applies when a gift card is redeemed. Here is how that fits its plans and payment types.
What Square Charges for Tap to Pay on Your Phone: A tap on your phone is an in-person card payment on Square's sheet. Here is what that fee bucket costs, and what else you pay or do not.
What Square Charges When You Refund a Sale: A refund sends the customer's money back. What happens to your processing fee depends on the plan you picked and how the card was charged.
What Square Charges for Invoice Payments: Square's own pricing page spells out the card rate for invoice payments, the ACH bank transfer rate, and the free cash and check option. Here is what it says.
Credit Card Processing With No Monthly Fees: Some processors advertise a $0 monthly fee. Here is what their own pages say you pay instead, and how to tell if it wins for your sales.
What PayPal Business Account Fees Look Like: PayPal's fee page is a menu of separate products, each with its own rate. Here is what it says each one costs.

Merchant accounts and approval

Merchant Account Examples for a US Small Business: The phrase sounds abstract until you see it in use. Here are four everyday setups, plus what each processor's own page says about pricing and funding.
What a Merchant Account Solution Actually Is: A merchant account holds the money from card sales. A gateway moves the data. Here is how the two pieces fit and what one processor charges for them.
How to Get a Merchant Account, Step by Step: A gateway account clears on its own once the form is right. A merchant account is judged on your industry, your credit and how fast you answer questions.
How to Open an Authorize.net Merchant Account: A merchant account is the bank piece behind every card sale. Here is what Authorize.net's own pages say about getting one, from the two plans to the fees.
What a Clover Merchant Account Actually Is: You have seen the name on a card reader. Here is what Clover's own pages say a merchant account is, who approves it, and what happens after you apply.
How Do I Set Up a Merchant Account?: A merchant account is where card money lands before it reaches your bank. Here is what it is, what an underwriter checks, and the steps to get one live.
Setting Up an American Express Merchant Account: What an American Express merchant account is, whether your business needs a separate one, and what processor pages say about taking Amex cards.
What a Credit Card Merchant Account Really Is: The account that holds card money before it reaches your bank is not the same piece as the gateway that moves the data. Here is how the parts fit, and what you will see on pricing pages.
What a Merchant Service Account Actually Is: On Authorize.net's page, card money passes through a merchant account. Here is what that account does and what it costs.
Naming Every Merchant Account Fee on the Sheet: A pricing page reads like fine print until you can name each fee. Here is the full list, with Authorize.net's own published numbers as the worked example.
Merchant Account Charges, Named One by One: A merchant account statement can read like a puzzle. Here is each fee type named and sorted by when it hits your bill.
What a Merchant Account Provider Actually Is: The phrase bundles two things: the account that holds your card money, and the company that sets it up. Here is how to tell them apart, and what each processor's own page says.
What a Merchant Account Processor Does and Charges: A merchant account processor moves your card money from the sale to your bank. Here is the role explained, plus what five processors' own pages say they charge.
How the Merchant Account Process Works: A merchant account is what lets a business take cards. Here is what it is, what an underwriter checks, and how the setup steps run.

What each processor charges

What Stripe's Pricing Page Says It Charges: A plain walkthrough of Stripe's published fees for US small businesses: card rates online and at the counter, international add-ons, refunds and custom pricing.
Lower Stripe Fees Without Switching Processors: Stripe's fees turn on what you sell, how you take it, and what you refund. Here are the levers, read from Stripe's own pricing page.
What Square Charges for Card Payments: Square's own pricing page lists a rate for each way a card can reach you. Here are those rates, grouped by how the payment happens.
What Square Charges in Fees, by Plan and Sale Type: Square's own pricing page lists a rate for every way a sale can happen. Here is what it says, from taps at the counter to invoices sent by email.
What Square Charges for Each Way You Get Paid: One processor, many rates. Here is what Square's own pricing page says it charges, sorted by how the customer actually pays you.
Square Rates and Fees, in Plain Terms: What Square's own pricing page says it charges, sorted by how you take the payment: in person, online, by invoice, or keyed in by hand.
What Square's Pricing Page Says It Charges: Square fees come down to two questions. What does Square take per transaction, and does it charge anything monthly? Here is what its own page says.
What Authorize.net Charges to Process Credit Cards: Authorize.net's own pricing page lists a $25 monthly fee, per-transaction fees and a few add-ons. Here is what each line says, in plain words.
What Your Shop Pays on a Visa Credit Card Sale: A customer taps a Visa card and some of that money never reaches you. Here is who takes what, and what each processor's own page says it charges.
What Shopify Charges to Take Credit Cards: Shopify's cost comes in two parts: a monthly plan and a cut of each card sale. Here is what its own pricing page lists.
What PayPal Charges to Take a Card Payment: PayPal posts its rates on one fee page. Here is what it says a US small business pays for online, in-person and international card sales, plus the optional extras.
What PayPal Charges a US Business Account: PayPal's own fee pages list a rate for every way you can take money. Here is each one, read straight off the page.
What Clover Fees You Might See Before You Sign: Clover's own pages do not post one flat processing rate. Here is the fee structure it does describe, and where to confirm the rest.

Asked elsewhere

What Credit Card Processing Fees Cost a Business: Every card sale takes a cut. Here are the fee types on a processing bill and what each processor's own pricing page says it charges.
Paying to Be Paid Tonight: Waiting a day or two for your money is usually free. Getting it in minutes has a price, and each processor posts its own.
A Forty Dollar Sale at the Counter: The same tap of a card costs a different cut on each processor's sheet. Here is how four published price lists treat a sale made in person.