Payfac As A Service: Backend Orchestration and Settlement
Payfac As A Service (Payment Facilitator as a Service) is a software infrastructure model that allows platforms to embed payment processing without building a full financial institution from scratch.
1. Multi-Tenant Merchant Onboarding
The technical core of the service is an automated KYC/KYB (Know Your Customer/Business) engine. It utilizes APIs to perform real-time background checks, credit scoring, and anti-money laundering (AML) screening. This allows sub-merchants to be "provisioned" for processing in minutes rather than weeks.
2. Ledgering and Payout Logic
The system maintains a "Shadow Ledger" that tracks the gross transaction volume, deducts processing fees (interchange plus markups), and calculates the net payout. The Settlement Engine then orchestrates the movement of funds via ACH or RTP (Real-Time Payments) from the acquiring bank to the sub-merchant's account.
3. Tokenization and PCI Compliance
To minimize security risk, Payfac platforms utilize Vaultless Tokenization. Sensitive card data is replaced with a non-sensitive token before it enters the platform’s environment. This reduces the scope of PCI-DSS compliance, as the actual cardholder data is only handled by the underlying hardware security modules (HSM).