Payment Processing: How Businesses Accept, Route, and Settle Payments
Payment processing is the infrastructure layer that allows businesses to accept payments from customers, route those payments through the appropriate network, and receive the settled funds into their bank accounts. For domestic businesses accepting card payments from consumers, payment processing is largely invisible: integrate a payment gateway, accept card payments, get settled in two days. But for businesses operating internationally, accepting payments from customers in multiple countries, processing in multiple currencies, or operating in sectors that payment processors classify as higher risk, payment processing is one of the most strategically important and operationally complex parts of running the business. Faisal Khan LLC advises businesses on payment processing strategy, connects them to acquiring banks, payment gateways, and payment facilitators appropriate for their business model and risk profile, and helps businesses navigate the compliance and onboarding requirements that payment processors impose.
How Payment Processing Works
When a customer pays for something with a card, a chain of real-time interactions happens in the seconds between the tap, swipe, or click and the approval displayed on the terminal or screen:
The merchant's payment gateway captures the payment data and transmits it to the acquiring bank.
The acquiring bank (the bank that processes card payments on behalf of the merchant) routes the transaction to the appropriate card network.
The card network (Visa, Mastercard, American Express, UnionPay) routes the authorization request to the issuing bank (the bank that issued the customer's card).
The issuing bank checks the card's available balance or credit limit, runs its own fraud and risk checks, and returns an authorization approval or decline to the card network.
The approval or decline travels back through the network, gateway, and terminal to the customer, all within 1 to 3 seconds.
Settlement happens on a separate cycle: at end of day, the merchant's processor submits the day's authorized transactions for settlement. The card network facilitates the movement of funds from issuing banks to the acquiring bank. The acquiring bank credits the merchant's account, typically on a T+1 or T+2 basis, minus interchange fees (paid to the issuing bank), network fees (paid to the card network), and the merchant discount rate (the processor's revenue).
The Key Players in Payment Processing
Payment gateway: The technology layer that captures payment data, encrypts it, and transmits it to the acquiring bank. Gateways can be standalone (Authorize.net, NMI, Paymentez) or part of a bundled processing solution. For international businesses, a gateway that supports multiple currencies and payment methods is essential.
Acquiring bank (acquirer): The licensed financial institution that has a direct relationship with the card networks and processes card transactions on behalf of merchants. Getting a direct acquiring relationship requires meeting the acquirer's underwriting criteria. Many merchants access acquiring through a payment facilitator rather than directly.
Payment facilitator (PayFac): An entity that aggregates multiple merchants under its own master merchant account with an acquirer. Stripe, Square, and PayPal are the most prominent examples. PayFacs onboard merchants quickly but subject them to the PayFac's underwriting criteria, pricing, and risk management policies. Large merchants eventually benefit from direct acquiring relationships.
ISO (Independent Sales Organization): An agent of an acquiring bank that resells payment processing services to merchants. ISOs typically have more flexible underwriting than direct acquiring for certain business types and can often find processing solutions for businesses that large direct acquirers decline.
High-risk processors: Specialized acquiring banks and ISOs that serve merchants in sectors classified as higher risk: gaming, adult content, nutraceuticals, forex/CFD trading, cryptocurrency-related businesses, travel, subscription billing, and others. High-risk processing comes with higher rates but provides access where mainstream processors cannot.
International and Multi-Currency Payment Processing
For businesses operating internationally, domestic payment processing is only part of the picture. International payment processing adds several layers of complexity:
Currency conversion: Customers in different countries want to pay in their local currency. Dynamic Currency Conversion (DCC) allows the merchant to quote in the customer's currency but is often poorly priced. Multi-currency processing with local currency settlement is the better approach for high-volume international merchants.
Cross-border interchange: Card transactions where the cardholder and the merchant are in different countries attract higher interchange fees than domestic transactions. Understanding cross-border interchange rates and structuring your acquiring to minimize them (for example, by using local acquiring where your transaction volume justifies it) is meaningful at scale.
Local payment methods: In many markets, a significant portion of customers prefer local payment methods over international card brands. Brazil's Pix and Boleto, India's UPI, Indonesia's GoPay and DANA, Germany's SOFORT, the Netherlands' iDEAL, and many others. Serving international markets effectively requires supporting the preferred payment methods in each market, not just Visa and Mastercard.
Acquirer geographic restrictions: Not all acquiring banks process transactions from all countries. Getting acquiring coverage for high-risk geographies or unusual customer bases requires specialist processors and relationships.
We connect businesses to international payment processing solutions appropriate for their geographic footprint, business model, and risk profile, including high-risk acquiring, multi-currency processing, and local payment method integration.
Payment Processing for Higher-Risk Business Types
Certain business categories are systematically excluded from or restricted by mainstream payment processors due to elevated chargeback risk, regulatory complexity, or reputational concerns for the processor. These include:
Financial services: Forex and CFD trading, cryptocurrency exchanges, money transfer operators, lending, and investment services.
Gaming and gambling: Online casinos, sports betting, poker sites, and fantasy sports platforms.
Digital goods and subscriptions: Software, streaming services, and other businesses with high chargeback rates.
Nutraceuticals and supplements: High chargeback risk and regulatory complexity.
Travel: High-value, advance-purchase transactions with refund and chargeback exposure.
Adult content: Reputational risk for mainstream processors.
For businesses in these categories, standard payment processor onboarding will typically result in rejection or account termination after initial approval. The solution is specialist high-risk acquiring through ISOs and acquiring banks with appropriate risk appetite and underwriting capability for the specific business type. We connect higher-risk businesses to processing solutions and help prepare the documentation and compliance infrastructure that specialist acquirers require.
Frequently Asked Questions
What is a chargeback and why does it affect my payment processing options?
A chargeback is a transaction reversal initiated by the cardholder's bank, typically when a customer disputes a transaction they do not recognize or claims they did not receive goods or services paid for. Processors and acquirers set chargeback ratio thresholds (typically 1% of transactions per month for Visa and Mastercard standards). Merchants who exceed these thresholds face penalties, processing restrictions, or account termination. Business models with inherently higher chargeback rates (subscriptions, digital goods, travel, high-value items) are classified as higher risk.
How do I find payment processing if I have been declined by mainstream processors?
Work through specialist ISOs and high-risk acquiring banks. These entities underwrite merchants that mainstream processors decline and have the risk frameworks to manage elevated chargeback exposure. The trade-off is higher processing rates and sometimes reserve requirements. We connect businesses to high-risk processing solutions and can advise on what to expect in terms of rates and conditions.
What is a merchant reserve?
A rolling reserve is a portion of processing volume held back by the acquirer (typically 5% to 10% of transaction volume for 90 to 180 days) as a security deposit against potential chargebacks. It is common for new merchants and for higher-risk businesses. The reserve is released on a rolling basis as the merchant demonstrates a clean chargeback history. Negotiating the reserve level and release schedule is part of the acquiring agreement negotiation.
Can I have multiple payment processors?
Yes, and for serious international businesses, having multiple processing relationships is advisable. Processor redundancy protects against account termination risk. Geographic diversification of acquiring (a European acquirer for European transactions, a US acquirer for North American transactions) can reduce interchange costs and improve approval rates.
Get the Right Payment Processing Solution for Your Business
Payment processing is not a commodity. The right solution for a global e-commerce business with customers in 40 countries is fundamentally different from the right solution for a US-only retail business. And for businesses operating in higher-risk categories, finding processing at all requires specialist relationships and a credible compliance posture. Faisal Khan LLC advises businesses on payment processing strategy, connects them to acquirers, ISOs, and payment facilitators appropriate for their specific situation, and helps prepare the documentation and compliance infrastructure that processors require. We do not process payments ourselves. We connect you to the right processing infrastructure and help you navigate the onboarding requirements that stand between your business and a stable, long-term processing relationship.