The Routing Error

BIS finds that prolonged processing times are largely driven by time spent at the beneficiary bank. The bottleneck is not the network. It is what each node does before forwarding the payment: compliance checks, batch processing, operating hours, and capital-control review.

Total direct fees in the Nairobi-Shanghai example can reach $50-120 before FX margin. Total compliance screenings: four separate runs of the same payment against overlapping but different sanctions lists. Total processing windows: four, potentially spanning three business days if time zones misalign. A direct stablecoin settlement path requires one compliance check before value moves, one fee, and settlement in minutes.

The World Bank's Remittance Prices Worldwide database reports a 6.49% global average cost across tracked corridors. No region has reached the UN SDG target of 3%. For the $905B in global remittances in 2024, 6.49% translates to roughly $59B extracted annually in fees, FX margins, and intermediary charges. That number is real, but it is only one layer of the routing error's cost.

The FSB's G20 Roadmap monitoring reports that the global average B2B cross-border transaction cost is 1.6%, still above the 1% target. In emerging-market corridors, the infrastructure cost paid by payment operators, fintechs, and MTOs is often higher: on/off-ramp fees of 1-2%, compliance infrastructure of 0.3-0.8%, ramp FX margin of 0.5-1.5%, and correspondent or liquidity fees of 0.2-0.5%. On a typical operator margin of ~20%, this 3-4% infrastructure floor leaves only 0.5-1% retained margin. McKinsey data shows why fintech attackers can undercut incumbents while still facing a hard infrastructure floor: incumbents can charge up to 3.4% in P2P, while attackers charge roughly one-fifth of that level.

For an importer paying through the correspondent banking system, the transaction fee may be the smallest cost component. The real cost is capital lockup: money that cannot be used while it sits in the settlement pipeline. A $1M payment that takes 3-5 business days to settle at a 12-18% annual cost of capital costs roughly $165-250 in implicit financing cost. Across thousands of payments, that becomes a material share of trade value. Globally, an estimated $4T sits idle in prefunded nostro/vostro accounts positioned to cover settlement delays.

JP Morgan estimates the B2B cross-border market at $194.6T, and the IMF's broader cross-border payment estimate approaches $1 quadrillion. At this scale, the routing error is not primarily a fee problem. It is a capital-efficiency problem.

BIS CPMI data documents a sustained global decline in active correspondent banking relationships. The decline is evident across advanced economies, emerging Asia, Latin America, the Middle East, and Sub-Saharan Africa. In Africa, the decline was sharper: 34.2%, with USD-specific relationships falling 40.9%. As direct correspondent links disappear, remaining routes get longer and more congested. Payments that previously routed through two hops may require three or four.

SWIFT gpi delivered measurable speed improvements: 40% of gpi payments credited within 5 minutes, 50% within 30 minutes, 90% within 1 hour, and nearly 100% within 24 hours. But gpi is a transparency and speed layer applied to the existing multi-hop architecture. It does not reduce the number of hops, eliminate intermediary fees, or change routing logic. Tracking a package does not make the delivery route shorter. It makes the inefficiency visible.

The Atlantic Council links payment fragmentation partly to increased compliance costs, as banks sever less profitable correspondent links, especially in smaller states with lower volumes. The banks that exit are not replaced. The routes get longer. The costs go up.

In the correspondent chain, each intermediary screens independently. Bank C in London does not know what Bank D in New York found. Each screening is a silo. In direct stablecoin settlement, compliance clears once, before value moves. Travel Rule data - originator, beneficiary, institution identifiers - is assembled upfront and transmitted with or before the value transfer. BIS Project Aurora demonstrated that cross-border supervisory data sharing through a unified compliance layer can detect patterns that siloed bank compliance cannot.

Correspondent banking requires each bank in the chain to maintain a nostro account prefunded with the currency needed for settlement. Global estimates place $4T in capital trapped in prefunded MTO and correspondent banking accounts. For African corridors specifically, an estimated $15-30B sits in nostro/vostro positions. Direct stablecoin settlement reduces the need for prefunding at each hop because value moves in real time and settlement is final within minutes.

With multilateral netting, the capital efficiency improves further. CLS Bank settles about $5T daily in FX and uses a 96% netting-ratio benchmark. At that efficiency, each dollar of network liquidity supports roughly 25x more settlement activity than a gross prefunded model.

The FSB-coordinated G20 Roadmap, launched in 2020, set quantitative targets for cross-border payment improvement by 2027. Cost rises with each intermediary fee. Speed falls with each processing window. Transparency degrades when the sender cannot see deductions at each hop. Access narrows as correspondent relationships disappear. The BIS notes that most international policy actions are complete, but jurisdiction-level implementation remains the binding step.

Ripple's On-Demand Liquidity tried to replace multi-hop correspondent chains with direct settlement through XRP as a bridge asset. The technical premise was sound: replace four hops with one. The execution failed for three reasons: XRP's volatility made partners hold it for only about 90 seconds, subsidized adoption depended on payments such as $50.2M to MoneyGram in a single year, and bilateral liquidity in one corridor did not create reusable liquidity in another. Ripple's pivot to RLUSD is an implicit acknowledgment that the routing correction requires a stable-value settlement asset, not a speculative one.

The argument: a Kenya-to-China payment through London and New York crosses UK FCA and US OFAC screening. These are not redundant; UK sanctions lists differ from US lists. Removing intermediaries removes compliance layers that currently catch illicit flows.

This is partially valid. BIS Project Aurora found that siloed compliance at individual banks misses cross-border patterns visible only in aggregate data. Each correspondent screens independently without seeing what others found. A single pre-clearance check with full counterparty data can match or exceed four independent partial checks, but only if the regulatory framework mandates equivalent depth. The real risk is regulatory arbitrage if direct-settlement jurisdictions set lower compliance bars than the correspondent chain currently enforces.

The argument: in the correspondent chain, risk is distributed across four independently regulated banks. In stablecoin settlement, value may depend on one or two stablecoin issuers maintaining reserves, honoring redemptions, and not freezing addresses. That can trade four regulated chokepoints for one less-diversified chokepoint.

This is the strongest structural criticism. Tether reserve transparency remains limited. Circle is more transparent but still a single point of failure. The mitigation is multi-issuer architecture, routing through multiple stablecoin issuers so no single issuer controls a majority of corridor volume. But no corridor has achieved true multi-issuer redundancy at scale. The concentration risk is real and currently unresolved; it is the primary infrastructure challenge for stablecoin-based settlement.