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FPSF-SS-001 — Business Models

Layer: Business Model · Audience: founders, financial institutions, payment service providers, and institutional entrepreneurs evaluating the Stablecoin Stack as a commercial foundation.

The Stablecoin Stack is an open specification. It defines how stablecoin payments are authorized, transmitted, and settled — not how Processors monetize them. That commercial design space is deliberately open.

This document maps the principal revenue models available to Processors and Acquirers.

1. Revenue Primitives​

Before describing specific models, it is useful to enumerate the fundamental revenue mechanisms available in the ecosystem.

Transaction Fees (On-Chain). The Settlement Contract charges an Operator Fee on every transfer. The Operator Fee has two components, both per-token: an absolute baseFeeAmount and a percentage operatorFeeBps. Both are collected atomically with the payment.

Subscription Fees (Fiat). A Processor may charge merchants a recurring subscription fee for access to the service. This is entirely independent of the on-chain fee mechanism.

Acquirer Commission. A registered Acquirer earns acquiringFeeBps of the principal on every transaction referencing their acquirerId. The Settlement Contract distributes this automatically at settlement, per-token. The Acquirer does not invoice the Processor — the commission is on-chain and guaranteed.

Custody and Conversion Spread. In custodial configurations, the Processor receives funds in stablecoin and delivers fiat to the merchant. The difference between stablecoin value and fiat delivered — after market conversion — is a conversion spread.

Float Income. In custodial configurations, there is a period between receiving stablecoin and disbursing fiat. Idle stablecoin balances can be deployed in yield-bearing protocols. Float income accrues to the Processor.

2. The Custody Spectrum​

The most consequential decision a Processor makes commercially is where on the custody spectrum it operates.

Non-Custodial. The Settlement Contract delivers funds directly from payer to merchant. The Processor never holds the merchant's funds. Revenue is limited to the Operator Fee and any subscription charges. Operational and regulatory burden is substantially lower.

Custodial. The Processor holds stablecoin on behalf of the merchant and converts to fiat. This opens conversion spread and float income but introduces regulatory obligations related to holding client funds.

Hybrid. A Processor may offer both, allowing merchants to choose.

3. Business Models for Processors​

3.1 Transaction-Fee Processor​

The simplest model. The Processor earns the Operator Fee on every transfer — no subscription fees, non-custodial. Revenue is entirely variable, tied to payment volume.

Best for: early-stage deployments; merchants already comfortable holding digital assets.

3.2 Subscription-Based Processor​

The Processor charges a recurring fiat subscription for access to the service. On-chain fees are set near cost recovery only. Provides predictable cash flow decoupled from volume.

Best for: B2B merchant relationships; deployments with a broader product suite (analytics, integrations) to justify the subscription.

3.3 Blended Fee Processor​

Combines a lower subscription fee with a per-transaction Operator Fee. The most common structure in mature payment processing businesses. Aligns Processor incentives with merchant growth while providing a revenue floor.

Best for: most general-purpose Processor deployments.

3.4 Custodial Full-Service Processor (Fiat-Out)​

The Processor accepts stablecoin, converts to fiat, and disburses to the merchant's bank account. The merchant interacts entirely in fiat — pricing, invoicing, receiving. Stablecoin rails are invisible to them.

Revenue: Operator Fee; conversion spread; float income; optional premium for accelerated disbursement.

Best for: mainstream merchant adoption; markets where merchants have no appetite for digital asset management.

3.5 White-Label Processor​

The Processor deploys the Stablecoin Stack as infrastructure and licenses it to other companies who want to offer stablecoin payment acceptance under their own brand. Revenue: licence fee or revenue share from white-label clients; optional Acquirer registration for the underlying stack.

Best for: Processors with strong technical infrastructure who prefer a wholesale distribution model.

3.6 SaaS Infrastructure Provider​

The Processor does not operate a payment service for merchants at all. It sells managed, hosted Stablecoin Stack infrastructure to companies who want to become Processors themselves. Revenue: monthly SaaS subscription; usage-based billing.

Best for: infrastructure-focused companies with deep Stablecoin Stack expertise.

3.7 Float-Yield Processor (Zero-Fee)​

An unorthodox model: the Processor charges no transaction fee and no subscription. Revenue is generated entirely from deploying stablecoin balances in yield-bearing instruments. Volume growth drives larger float balances and higher yield. This model was not viable on traditional card rails — the Stablecoin Stack enables it by eliminating mandatory fee-sharing with card networks.

Best for: Processors with significant capital; treasury-focused operators.

4. Business Models for Acquirers​

4.1 Classic Distribution Acquirer​

The Acquirer signs up merchants and refers them to a Processor. When those merchants process payments, the Acquirer's acquirerId is included, and the Settlement Contract automatically credits the Acquiring Fee. No invoicing. No billing disputes. The commission is on-chain and guaranteed.

4.2 Wallet-as-Acquirer​

A digital wallet developer registers as an Acquirer. The wallet's users include the acquirerId in payment payloads. The wallet earns a commission on every transaction made through it — a passive revenue stream once the user base is established. This model has no precedent on traditional payment rails.

4.3 Point-of-Sale Hardware Acquirer​

A company manufacturing or distributing POS terminals pre-configures them with the vendor's acquirerId embedded. Every payment on a deployed device earns the vendor a commission — indefinitely. This inverts traditional terminal economics: the hardware vendor participates directly in the payment economics, not just in hardware margins.

4.4 Platform Acquirer (Marketplace or App Store)​

A marketplace platform registers as an Acquirer. Merchants on the platform automatically use the platform's acquirerId. The platform monetizes its existing merchant base through commission without building payment infrastructure.

4.5 Regional Agent Network​

An Acquirer recruits local agents who sign up merchants in their area and earn a share of the Acquirer's commission. The on-chain commission mechanism creates aligned incentives throughout the network without complex bilateral agreements.

5. Combined Models​

5.1 Vertically Integrated Full-Stack Operator​

A single company operates as both Processor and Acquirer, capturing both the Operator Fee and the Acquiring Fee on self-originated transactions.

5.2 Cooperative Payment Network​

A group of companies jointly funds and operates a Stablecoin Stack Processor as shared infrastructure. Each participant registers as an Acquirer and earns commission on the merchants they bring. Infrastructure costs are shared; no single participant bears the full burden.

5.3 Franchise Payment Network​

A franchisor operates the Processor infrastructure and recruits franchisees who act as Acquirers in defined territories. The franchisor earns the Operator Fee on all transactions; franchisees earn the Acquiring Fee on their territory's merchants.

6. Guidance for New Entrants​

Start simple. The blended fee model (Section 3.3) is a sound default for most general-purpose Processors. Subscription for predictable base revenue; per-transaction fee for volume-correlated upside.

Let the infrastructure work for you. The full technical stack is open-source. The investment required to become a Processor is operational, not primarily technical.

Choose custody deliberately. Non-custodial is simpler, faster to deploy, and has lower regulatory exposure. Most early deployments start non-custodial and add custodial services once the core business is established.

The Acquirer model is underutilized. The on-chain Acquirer mechanism is a powerful distribution tool with no equivalent in traditional payment networks. The commission is guaranteed by the Settlement Contract, not by a bilateral agreement.

Settlement speed is a concrete merchant value proposition. Funds in seconds, not next business day — quantifiable, compelling, and superior to any traditional payment rail.

FPSF-SS-001 v1.0.0 · Draft · Fabric Payment Standards Foundation · Apache-2.0