What Is a Payment Service Provider?

A payment service provider — PSP — is the company that makes it possible for a business to take money from a customer without assembling the payment chain itself. It supplies the technical connection to cards and other payment methods, secures and authorises each transaction, manages risk, and in most cases collects the funds and settles them into the merchant's account.

Without a PSP, accepting a single card payment would mean a scheme relationship, an acquiring licence, PCI-certified infrastructure, fraud tooling and a settlement operation. The PSP compresses all of that into one contract and one integration.

What a PSP actually does

• Connectivity. One integration that reaches card schemes, open banking and local payment methods instead of dozens of separate contracts and APIs.
• Authorisation and security. Tokenisation, PCI DSS scope, 3-D Secure and strong customer authentication handled on the provider's infrastructure.
• Risk and fraud control. Screening, velocity rules, chargeback handling and monitoring against scheme thresholds.
• Settlement. Collecting funds, netting fees and refunds, and paying the merchant on an agreed schedule.
• Reporting. Transaction, fee and settlement data in a form finance teams can reconcile.
• Compliance and onboarding. KYB, ownership verification and ongoing monitoring, delivered under a licensed institution's supervision.

PSP, acquirer, gateway, aggregator: the differences that matter

These four words are used interchangeably in marketing and mean quite different things in a contract.

The acquirer is the licensed institution with scheme membership. It carries the financial risk if a merchant fails to honour refunds or chargebacks, which is why underwriting exists at all.

The gateway is the transmission layer — it takes payment credentials, tokenises them and passes an authorisation request. It never holds your money.

The PSP is the commercial service around both: onboarding, gateway, acquiring relationships, risk, settlement and support.

An aggregator is a PSP that places many merchants under one master merchant account. Onboarding is instant, which is attractive, but the account is shared — and that is precisely why aggregators close accounts abruptly when a merchant's risk profile shifts. Businesses in regulated or high-chargeback sectors generally need a dedicated merchant account instead.

What a PSP costs

Pricing is normally a percentage plus a fixed amount per transaction, sitting on top of interchange and scheme fees. Around that sit monthly platform fees, chargeback fees, cross-border and FX margins, payout fees and — for higher-risk merchants — a rolling reserve holding a percentage of settlement for a fixed period.

Comparing headline percentages is the most common purchasing mistake. Two providers quoting the same rate can differ by a wide margin once decline rates, FX handling and reserve terms are included. The number that matters is total cost per settled unit of revenue, measured on your own traffic.

How to choose a PSP

Start with coverage. Does the provider support the payment methods your customers actually use in each market you sell into — not just cards, but open banking, iDEAL, SPEI, Interac, Khipu and their equivalents? Method fit moves approval rates far more than pricing negotiation does.

Then test resilience. Ask whether more than one acquirer can be routed to, and what happens to conversion when one degrades. Ask how disputes are handled operationally, not just what the chargeback fee is. Ask how settlement reporting reaches your finance system.

Finally, confirm the underwriting position honestly. If your sector is classified as higher risk, an aggregator that onboards you in ten minutes is not a win — it is a deferred outage. A provider that asks detailed questions before saying yes is usually the one that will still be processing for you in two years.

Where BounceMoney fits

BounceMoney is the platform layer: one integration reaching card acquiring, open banking and local payment methods through leading regulated payment partners, with routing across providers rather than dependence on any single one. Bounce Pay is the acceptance product for merchants; Bounce Credits is the prepaid, chargeback-protected option for sectors where card risk is hardest to underwrite. PSPs, ISOs and platforms can run the same infrastructure under their own brand.