Every payment-gateway-cost topic and buying guide on the site, grouped so you can pick the right entry point. Vendor pages live under /vendors, head-to-heads under /compare.
The deepest cost reference and the by-company-size buying guides.
Every pricing model, every published rate, every quote-only acquirer, with worked examples.
Step-by-step framework from volume profiling through RFP to contract signing.
Under $100K monthly: why flat-rate wins, when to switch to interchange-plus.
$100K-$1M monthly: when Helcim wins, when to RFP quote-only acquirers, break-even math.
Over $1M monthly: Adyen, Worldpay, Checkout.com, Fiserv, Chase. All quote-only.
How payment gateways actually price, and who refuses to publish a rate card.
What interchange is, how Visa and Mastercard publish it, why your fee is always interchange-plus-something.
Cost stack from interchange through assessments and acquirer margin, why flat-rate works.
Adyen, Worldpay, Checkout.com, NMI, Chase, Elavon, Global Payments, Fiserv. What is public, how to extract a quote.
The cost lines that do not show up in the headline rate: chargebacks, FX, fraud, PCI, implementation, surcharging.
PCI non-compliance, account-updater, gateway fee, ETF, monthly minimum, chargeback handling.
Per-vendor fee table including Stripe two-tier ($15 receipt + $15 counter from 17 Jun 2025).
Stripe +1.5% cross-border + 1% FX, PayPal +1.5%, Amazon Pay +1%, Mollie per-method.
Stripe Radar $0.05/screen, Radar for Fraud Teams $0.07, Signifyd outcome-based, Sift volume-tier.
Developer time, PCI scope, certification, sandbox testing, per-vendor go-live profile.
Levels 1-4, SAQ vs ROC scope, where to source a QSA or ASV, per-gateway pass-through PCI fees.
Stripe Billing, Chargebee, Recurly, GoCardless for direct debit. Subscription surcharge structure.
Premium over standard rate for CBD, supplements, adult, gambling, travel. Reserves and rolling holds.
Legal landscape by US state. Vendor support. Square cash-discount and Helcim surcharge programs.
30-question framework for soliciting comparable interchange-plus quotes from quote-only acquirers.