The Payments Ecosystem: How It Works, Who's Involved, and Why It Matters

The payments ecosystem is the network of technologies, institutions, and regulations that moves money. Every digital transaction passes through multiple interconnected participants before funds reach where they need to go. This applies whether the payment is made online, in person, or in-app.

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What is a payment?

A payment is the transfer of value from one party to another, in exchange for goods, services, or debt settlement. In its simplest form, it is a buyer giving something of agreed value to a seller. In modern commerce, that exchange rarely involves cash. It happens electronically, through a sequence of authorisations, data transfers, and flow of funds that complete in seconds.

Payments can take many forms. Examples include a card tap at a terminal, a bank transfer between businesses, a subscription charge, and a marketplace payout to multiple sellers. What connects them all is the underlying infrastructure that verifies identity, checks funds, moves money, and records the transaction. That infrastructure is the payments ecosystem.

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How a payment works

Every electronic payment moves through three distinct phases: authorisation, clearing, and settlement.

Authorisation

Authorisation is the real-time approval of a transaction. When a customer pays, the gateway encrypts the card data and routes it through the processor to the card network. The card network forwards the request to the customer's issuing bank, which checks for available funds and assesses fraud risk. The issuing bank returns an approval or decline. The response travels back through the network to the merchant in seconds.

Clearing

Clearing is the exchange of transaction data between banks following authorisation. At the end of the business day, the merchant's acquirer submits a batch of authorised transactions to the card network. The card network reconciles the data and passes details to each issuing bank, confirming what is owed.

Settlement

Settlement is the actual movement of funds. The issuing bank transfers the approved amount to the acquiring bank via the card network, minus interchange fees. The acquiring bank deposits the funds into the merchant's account, minus its own processing margin withstandard settlement taking one to two business days. Some providers offer next-day or same-day settlement for an additional fee.

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Key players in the payment ecosystem

Customers and merchants

Every transaction begins with a customer deciding to pay and a merchant ready to receive. The customer provides a payment method. The merchant provides the acceptance environment: an online checkout, a card terminal, or an in-app purchase flow. Their relationship sits at the centre of the ecosystem, with every other participant existing to facilitate the exchange between them.

Issuing banks

The issuing bank provided the customer's payment card or account. When a transaction is initiated, the issuing bank receives the request, checks for available funds, and approves or declines. If approved, it guarantees the funds and assumes liability for the transaction on behalf of the cardholder.

Acquiring banks

The acquiring bank holds the merchant's account and receives funds on their behalf. It connects the merchant to the card network and ensures approved transactions settle correctly. Acquirers take on the risk of processing payments for merchants and charge fees accordingly. Some payment service providers act as their own acquirer, which can improve authorisation rates and reduce costs.

Card networks

Card networks (Visa, Mastercard, American Express) provide the infrastructure connecting issuing and acquiring banks. They set the rules for processing, define interchange fee structures, and facilitate the exchange of transaction data between banks. They do not hold funds themselves but act as the central coordination layer for card payments globally.

Payment processors

Payment processors handle the technical work of transmitting transaction data between the merchant, the card network, and the banks. The processor encrypts payment data, routes it to the correct network, and manages the authorisation response back to the merchant. Processing typically takes milliseconds and operates invisibly behind the checkout experience.

Payment gateways

A payment gateway connects a merchant's checkout to the payment processor. It encrypts card data before transmission, formats the transaction request, and returns the authorisation result to the merchant. For online payments, the gateway is the technical bridge between the customer-facing checkout and the processing infrastructure behind it.

Gateways vary in how much compliance responsibility they transfer to the merchant. Hosted gateways handle most security requirements on behalf of the business. API-integrated gateways give merchants more control over the checkout experience but require greater technical responsibility for data security.

Read more in our payment gateway guide.

Payment service providers

A payment service provider (PSP) aggregates gateway, processing, and acquiring services under one relationship. Rather than managing separate contracts with an acquirer, processor, and gateway, businesses work with a PSP that handles all three. PSPs simplify payment acceptance and typically provide a single integration point, consolidated reporting, and a unified fee structure.

PSPs vary significantly in the capabilities they offer beyond basic payment acceptance. Some provide marketplace-specific infrastructure including split payments, seller onboarding, and escrow. Others focus on specific channels, geographies, or business types.

Read more in our payment service provider guide.

Payment facilitators

A payment facilitator (PayFac) holds a master merchant account and onboards businesses as sub-merchants beneath it. Rather than waiting weeks for merchant account approval, the PayFac handles underwriting, KYC, and compliance on behalf of each sub-merchant. Businesses operating under a PayFac can begin accepting payments within hours.

PayFacs assume significant responsibility within the ecosystem. They manage fraud monitoring, chargeback handling, and regulatory compliance for all sub-merchants on their platform. In the UK, PayFacs processing customer funds must hold FCA authorisation as a Payment Institution.

Read more in our payment facilitator guide.

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Payment methods

Card payments

Card payments (credit, debit, and prepaid) remain the dominant payment method for online and in-person transactions across the UK and Europe. Visa and Mastercard processed 42% of total European card payment value in 2025, according to GlobalData, with concentration significantly higher in the UK where domestic card scheme alternatives are limited. American Express serves a smaller but commercially significant segment. 

Digital wallets

Digital wallets store card or bank account details and enable customers to pay without entering card numbers at checkout. Apple Pay and Google Pay are the most widely used wallets across the UK and Europe, covering both in-person and online transactions. PayPal remains the dominant option for ecommerce, with broad merchant acceptance and built-in buyer protection that reduces checkout friction. All major wallets use tokenisation to protect card details, replacing sensitive data with a unique token for each transaction so the underlying card number is never exposed to the merchant.

Bank transfers and open banking

Bank transfers move funds directly between bank accounts without card networks as intermediary. Open banking, enabled by PSD2, allows third-party providers to initiate payments from a customer's bank account with their consent, reducing interchange fees and enabling faster settlement. Variable recurring payments (VRPs) are expanding into commercial use cases across the UK and Europe in 2026.

Real-time payments

Real-time payment systems process and settle transactions instantly, around the clock. In the UK, Faster Payments handles real-time domestic transfers. SEPA Instant Credit Transfer serves the European market. Businesses use real-time rails for supplier payments, marketplace payouts, and salary disbursements where settlement speed matters.

Buy now pay later

Buy now pay later (BNPL) allows customers to split purchases into installments, typically interest-free over a short period. Providers including Klarna, Clearpay, and Laybuy integrate at checkout as an alternative payment method. BNPL regulation is tightening in the UK, with FCA oversight of BNPL providers coming into force in 2026.

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Trending payment services and capabilities in 2026

Embedded payments

Embedded payments integrate payment processing directly into a software platform, marketplace, or application. Rather than redirecting users to a third-party checkout, the transaction happens natively within the product. Embedded payments aren’t just about the payment experience, under the PayFac model they’re a growth strategy. Each transaction becomes a multi-layered revenue generation opportunity across the whole payment journey. 

Read more in our embedded payments guide.

Split payments

Split payments divide a single transaction automatically between multiple recipients. A marketplace collects payment from a buyer, routes the correct amount to each seller, and deducts platform commission automatically. Franchise networks and multi-location businesses use split payment flows to centralise revenue collection whilst automatically distributing funds to individual locations. This removes manual reconciliation and simplifies the financial reporting that would otherwise require separate underwriting per location.

Read more in our split payments guide.

Omnichannel payments

Omnichannel payments unify online, in-person, and in-app transactions through a single integration and a single reporting view. Businesses operating across multiple channels use omnichannel infrastructure to eliminate separate systems and fragmented data.

White-label payments

White-label payment solutions allow businesses to offer payment services under their own brand, with the underlying infrastructure provided by a licensed payment provider. Platforms use white-label solutions to maintain a consistent brand experience throughout the payment flow.

Recurring and delayed payments

Recurring payments process charges on a defined schedule without requiring the customer to re-authorise each time. Delayed payments authorise a transaction at the point of purchase and capture funds later, at fulfilment or delivery. Both require PSD2-compliant card-on-file infrastructure.

Agentic commerce

AI agents are beginning to initiate and complete payments autonomously on behalf of users, purchasing goods, booking services, and settling invoices without manual intervention. Payment infrastructure is adapting to handle machine-initiated transactions, raising new questions around authorisation, liability, and compliance.

Escrow payments

Escrow holds funds in a secure account until defined conditions are met. Conditions include delivery confirmation, service completion, or dispute resolution. Marketplaces and platforms use escrow to protect buyers whilst giving sellers confidence that payment is secured before fulfilment begins.

Payment orchestration

Payment orchestration routes transactions across multiple providers, gateways, and acquirers through a single integration layer. Rather than relying on one provider for all transactions, orchestration platforms optimise routing based on authorisation rates, fees, and geography.

Identity-first payments

Identity-first payments embed verification directly into the transaction flow, using biometrics, device signals, and behavioural data to authenticate users without separate login steps. PSD2 is driving adoption across European markets. 3D Secure 2.0 enables risk-based authentication that keeps low-risk checkouts fast.

Digital currencies

Central bank digital currencies (CBDCs) and stablecoins are moving from pilot to commercial deployment. Stablecoins facilitated over $30 trillion in transaction volume in 2025. For businesses, the near-term relevance is cross-border settlement speed and cost reduction rather than consumer-facing payment methods.

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Payment processing by use case

Marketplaces

Marketplaces have to manage buyers, sellers, commissions, fees and more all within a single transaction. The payment infrastructure that marketplaces use must be able to handle automated split payments and the compliance requirements that come with it - but in most cases, things like seller KYC, delayed payments, escrow services and omnichannel acceptance are all required too. Standard gateways built for single-merchant ecommerce are not designed for this complexity.

Read more in our marketplace payments guide.

Platforms

Platforms distribute payment capability across the businesses or individuals operating within them, whether a franchise network, a SaaS product serving multiple clients, or an ordering system across multiple merchants. Multi-party payment flows, consolidated reporting, and consistent compliance across every connected business are the core requirements.

Merchants

Merchants selling directly to end customers need payment infrastructure that matches their channel mix and transaction volume. High-volume merchants benefit from interchange-plus or volume-based pricing. Those operating across online and physical channels need a provider capable of unifying both under a single integration.

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Payment processing by vertical

Retail

Retail businesses operate across online and in-person channels with high transaction frequency. Omnichannel infrastructure, integrated POS, and unified reporting across locations are standard requirements at scale.

Ryft works with leading retail businesses including Love The Sales, a premium fashion marketplace. Read the case study here.

Hospitality and leisure

Hotels, restaurants, and leisure venues need flexible payment acceptance across table ordering, room billing, online reservations, and in-person terminals. Split payments between venue operators and booking platforms are common. Tipping, service charge handling, and delayed capture are frequent requirements.

Epos Now, a leading point of sale platform serving retail and hospitality businesses globally, uses Ryft to power payment processing across its network. Read the case study here.

SaaS platforms

SaaS platforms embed payments to generate transaction revenue alongside subscription income. Recurring billing, sub-merchant onboarding, and flexible fee structures are the capabilities needed.

SwiftOrder, a food ordering SaaS platform, partnered with Ryft to embed payments and scale transaction revenue alongside its core subscription model. Read the case study here.

Healthcare and pharmacy services

Healthcare providers handle payments for appointments, prescriptions, and ongoing treatment. Delayed capture, recurring billing, and strict data protection standards sit alongside standard PCI DSS obligations.

Ryft is the National Pharmacy Association's Trusted Payment Partner. Read how Weldricks Pharmacy simplified payment processing with Ryft, or visit the NPA's guide to payment processing for independent pharmacies.

Ticketing

Ticketing platforms process high volumes of time-sensitive transactions for events, travel, and venues. Fraud prevention, instant confirmation, and refund management are critical. Escrow and delayed settlement are used where fulfilment occurs significantly after purchase.

Charities and nonprofits

Charities need infrastructure that supports one-off and recurring donations, Gift Aid processing, and clear financial reporting. A low-friction donor experience that minimises abandonment matters as much as cost.

Education

Education providers handle tuition fees, course payments, and installment plans. Recurring billing and multi-currency support are standard requirements for institutions with international students. BNPL is growing as an alternative to traditional installment arrangements.

Financial services

Financial services firms require strong compliance infrastructure, audit trails, and support for complex transaction types. Regulated firms face additional FCA obligations when safeguarding client funds.

Travel and mobility

Travel platforms process high-value transactions with extended gaps between payment and service delivery. Escrow services, refund management, multi-currency settlement, and real-time supplier disbursements are core requirements.

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Payment regulation and compliance

PSD2 and Strong Customer Authentication

PSD2 governs payment services across the UK and Europe. SCA mandates two-factor verification for most online card transactions, implemented via 3D Secure 2.0. PSD3 is progressing through European legislation, with adoption expected in 2026 and a transition period before implementation.

PCI DSS

PCI DSS sets security requirements for any business storing, processing, or transmitting cardholder data. Level 1 certification, required for businesses processing over six million card transactions annually, is the highest standard. Working with a certified provider transfers significant compliance responsibility away from the merchant.

FCA authorisation

Payment providers processing customer funds in the UK must hold FCA authorisation as an Authorised Payment Institution, Small Payment Institution, or Electronic Money Institution. Each licence type covers different payment activities and fund-holding permissions. Businesses using an FCA-authorised provider benefit from that regulatory coverage without needing their own licence.

KYC and AML

Know Your Customer and Anti-Money Laundering requirements apply to payment providers and the platforms they serve. Sellers and sub-merchants must be verified before receiving funds, with automated KYC reducing onboarding friction without compromising compliance. Ongoing transaction monitoring detects suspicious activity and triggers reporting obligations where required.

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Understanding your payment requirements

Key criteria

Choosing a payment provider involves more than comparing processing fees. The relevant criteria depend on business model, channel mix, transaction volume, and regulatory environment.

For marketplace and platform operators; split payment support, seller onboarding are non-negotiable, and often escrow functionality is required. For businesses operating in the UK and Europe, FCA authorisation and PSD2 compliance are baseline requirements. Pricing model matters at volume, flat-rate pricing is predictable but expensive at scale. Volume-based pricing reduces costs as transaction volumes grow.

Questions to ask

Before committing to a provider, these questions help identify the right fit:

• Is the provider compliant in the regions your business operates? 
• What payment methods does the platform support? 
• How does pricing change as transaction volume grows?
• Is support dedicated or ticket-based? 
• How long does integration take? 
• Does the provider support your specific requirements, such as split payments, escrow, recurring billing, or omnichannel processing?

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About Ryft

Founded in 2021 by the team behind Butlr, a marketplace they scaled to over one million users, Ryft was built to solve the payment challenges they couldn't find a solution for elsewhere. Ryft is an FCA-licensed payment solution built specifically for marketplaces and platforms, providing embedded payments, automated split payments, seller onboarding, and 24/7 support from humans. Speak to our team to find out how Ryft can work for your business.

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