FedNow and RTP vs stablecoin rails: where instant payments end and cross-border begins

FedNow and RTP are instant payment systems that settle US-dollar payments between US institutions in seconds — but both are strictly domestic, so neither can move money across borders. Stablecoin rails address the complementary problem: real-time, around-the-clock settlement between countries, where payments otherwise rely on correspondent banking and can take days. The two are not rivals; they solve different halves of the same institutional expectation that money should move at internet speed.

What are FedNow and RTP, and what do they actually cover?

RTP, operated by The Clearing House, launched in 2017 as the first new US core payments infrastructure in decades, offering real-time clearing and settlement between participating US banks. FedNow, the Federal Reserve’s own instant payment service, launched in July 2023 and extended instant settlement access more broadly across the US banking system, including many smaller and community institutions. Both operate 24 hours a day, seven days a week, settle in seconds with immediate finality, and use ISO 20022 message formats.

Their limits are equally clear. Both systems settle only US-dollar payments between US-domiciled institutions. Transaction caps apply — meaningful for large corporate flows — and participation, while growing steadily, is not yet universal across all US banks. Most importantly for any institution serving international customers: neither system has a cross-border leg. A FedNow or RTP payment ends at the US border by design.

Why cross-border payments remained slow while domestic payments went instant

Cross-border payments still predominantly travel through correspondent banking. A payment from a US bank to a beneficiary bank in another country typically passes through one or more intermediary banks, coordinated by SWIFT messaging. SWIFT itself moves messages quickly — often in minutes — but the settlement of funds depends on each intermediary’s processing, local banking hours, cut-off times, currency controls and compliance checks. End-to-end, cross-border settlement is commonly measured in days rather than seconds, and costs accumulate at each hop. The World Bank has long tracked global average remittance costs at several percentage points of the amount sent — far above domestic payment costs.

This is the asymmetry institutions now live with: a customer can move money across the United States in five seconds on a Sunday night, then wait days and pay materially more to move the same amount to a family member abroad. FedNow and RTP did not create that gap, but by resetting expectations domestically, they made it impossible to ignore.

The structural reason the gap persists is that domestic instant payments are easy to build in a way cross-border payments are not. FedNow and RTP each operate inside a single currency, a single legal system and a single central-bank settlement layer; every participant holds an account in the same money. A cross-border payment, by contrast, must bridge two currencies, two regulatory regimes and two banking systems with no shared settlement account between them — which is precisely the role correspondent banks have historically filled, and the role a neutral settlement asset can fill instead.

How do stablecoin rails compare on the dimensions that matter?

Stablecoin settlement applies the properties that make FedNow and RTP attractive — speed, finality, continuous availability — to the cross-border problem. A regulated stablecoin moves between counterparties in different countries in minutes, at any hour, with settlement finality on the underlying network, and converts to local currency through licensed on- and off-ramp partners at each end.

• Geographic reach: FedNow and RTP are US-only; stablecoin rails settle between any two points with network access and a compliant local partner, which is what makes them a practical SWIFT alternative for specific corridors.
• Availability: all three operate 24/7/365 — but only stablecoin rails extend that availability to international corridors, including the weekends when remittance volumes peak.
• Settlement speed and finality: seconds domestically on FedNow and RTP; minutes cross-border on stablecoin rails, versus days through correspondent chains.
• Cost structure: domestic instant payments are inexpensive; correspondent cross-border payments carry fees at each intermediary hop; stablecoin settlement compresses the chain to origin, network and destination.
• Compliance model: FedNow and RTP inherit the domestic banking compliance perimeter; stablecoin settlement requires AML compliance, sanctions screening and Travel Rule data to be carried explicitly with the payment — which well-designed platforms treat as a feature, not an afterthought.

FedNow and RTP answered the question of how fast money can move inside the United States. Stablecoin settlement answers the question those systems deliberately left open: how fast money can move between countries.

Do banks and MSBs have to choose between them?

No — and framing it as a choice misreads the architecture. For a US bank or MSB, the rational design is layered: domestic instant rails for US legs, stablecoin settlement for cross-border corridors, and shared standards binding the two. The convergence on ISO 20022 helps here. FedNow and RTP use ISO 20022 natively, SWIFT has been migrating cross-border messaging to MX (ISO 20022) formats, and stablecoin settlement platforms that speak the same language let a payment’s data travel intact across rails. An institution can receive a domestic instant payment, fund a cross-border stablecoin settlement, and reconcile both in one operational model.

• Use FedNow or RTP where both endpoints are US institutions and instant domestic settlement is the requirement.
• Use stablecoin settlement where the payment crosses a border — remittance corridors, supplier payments, B2B settlement — and correspondent banking is the slow, costly alternative.
• Insist on common message standards (ISO 20022) and a single compliance data model across both, so operations and audit see one system rather than two silos.

There are also emerging interlinking initiatives among domestic instant-payment systems internationally, and central banks continue to study their own digital settlement instruments. Those efforts are worth tracking, but they remain partial in coverage: bilateral links connect specific country pairs, and multilateral projects are still maturing. For institutions that need cross-border speed in production today, regulated stablecoin settlement is the rail that exists now — and the GENIUS Act, signed into US law in July 2025, gave the instrument itself a federal regulatory framework that makes the choice defensible to boards and examiners.

Where StableNet sits in this architecture

StableNet occupies the cross-border layer of this stack deliberately. The platform provides real-time stablecoin settlement across international corridors with KYC, KYB, KYT, sanctions screening and Travel Rule data attached to each payment, and connects to bank infrastructure through SWIFT MT/MX (ISO 20022) — the same standards family FedNow and RTP use. For banks and MSBs whose customers already expect instant payments at home, it is the piece that extends that expectation across borders without stepping outside the regulated perimeter.