Understanding The ECU and SLV FX Corridors
Catherine Kaupert
,
Head of Latin America
Ecuador and El Salvador use the US dollar as their currency. Ecuador dollarized in January 2000, after a currency collapse and El Salvador followed in 2001. As a result, no conversion step is required when moving money.
Neither Banco Central del Ecuador (BCE) nor El Salvador's Banco Central de Reserva (BCR) can issue currency, meaning they cannot act as a lender of last resort. Every dollar circulating must be earned through trade or debt.
Under an IMF program, El Salvador's legal reserve requirement has been rising, from 12% in January 2025 to a targeted 15% by June 2026. Remittances are the largest single dollar inflow: over $10.0bn in 2025, 27.3% of GDP, roughly 95% of it from the United States.
This document covers both corridors together, since the underlying mechanic (a payment that never needs an FX conversion) is identical. It walks a $10M USD payment through the stages of a cross-border transaction, explains how each country's payment rails work, and covers what changes for a non-USD sender.
Corridor at a glance
Ecuador | El Salvador | |
|---|---|---|
Currency | US Dollar (official since 2000) | US Dollar (official since 2001) |
FX conversion | None (USD is the domestic currency) | None (USD is the domestic currency) |
Central bank | Banco Central del Ecuador (BCE) | Banco Central de Reserva (BCR) |
Domestic instant rail | SPI (Sistema de Pagos Interbancario) | Transfer365 / Pay |
Capital movement tax | 5% ISD on outbound transfers only | None |
Reserve/liquidity requirement | ~2% USD reserves at BCE + ~30% liquid reserves | 12% (Jan 2025) → 15% (Jun 2026) |
Regulators | Superintendencia de Bancos | SSF |
IMF program | Active EFF | Active EFF ($1.4bn, 40-month) |
Corridor scale | ~$17.6bn bilateral goods trade (2025) | ~$6.9bn bilateral goods trade (2025) |
How the rails work
SPI (Sistema de Pagos Interbancario), administered by the BCE, is Ecuador's core interbank payment system: it settles roughly two-thirds of payments. This system is domestic only.
Transfer365 and Pay are El Salvador's domestic rails. Transfer365, run by the BCR, handles immediate interbank transfers. Pay is a newer, QR-code-based system launched in 2026 aimed at bringing informal workers and small businesses into the formal economy.
The liquidity constraint. Neither the BCE nor the BCR can create dollars. Ecuador's private banks hold deposits backed by roughly 2% USD reserves at the BCE plus roughly 30% in other liquid instruments, 65% of which must stay within the domestic financial system.
El Salvador's legal reserve requirement is being raised in stages under IMF conditionality specifically to build this kind of cushion. Neither mechanism affects a single institutional payment.
Who regulates this corridor
BCE (Banco Central del Ecuador) cannot set independent monetary policy or create currency, since the dollar is Ecuador's legal tender, but it still manages the country's payment infrastructure, including SPI.
Superintendencia de Bancos supervises Ecuador's financial institutions and national social security system.
BCR (Banco Central de Reserva) sits in the same position on the El Salvador side: no currency to issue, but it runs Transfer365 and administers the country's reserve.
SSF (Superintendencia del Sistema Financiero) is El Salvador's integrated financial regulator, covering banks, insurers, securities, and pensions since a 2011 merger. It's the compliance layer Salvadoran correspondents answer to.
Anatomy of a payment
1. Fund the source leg
The US company's bank debits its dollar account.
2. Carry the instruction
The bank dispatches a pacs.008 message over SWIFT to its correspondent, identifying the beneficiary, the amount, and the fee-bearing code (typically SHAR).
3. No conversion
There is no FX leg. The dollar amount arriving at the destination is the same dollar amount sent, less fees. What replaces currency risk is liquidity constraint: the receiving bank's ability to pay out promptly depends on the dollar liquidity it has actually accumulated.
4. Source the destination liquidity
The receiving bank pays out from its prefunded USD position, the same as any ordinary USD correspondent relationship.
5. Clear compliance
The originating bank screens the payment; the correspondent runs the OFAC check. There is no second country-specific regulator screening.
6. Reach settlement finality
The payment moves through ordinary USD correspondent banking, the same risk profile as a domestic US wire once it reaches the correspondent bank in Ecuador or El Salvador.
7. Pay out on the local rail
SPI (Ecuador) or Transfer365/Pay (El Salvador) credits the beneficiary directly in dollars.
Net. Cost on this corridor is correspondent fees only. Settlement is typically same-day to T+1, faster than the T+1-to-T+2 convention that applies in other corridors.
When the pair is not USD
A EUR, GBP, or any non-dollar payment to Ecuador or El Salvador converts to USD once, at the originating bank or its correspondent, exactly as it would convert to any other destination currency.
Neither country is a member of the SML, the Mercosur local-currency settlement system.
FAQ
Is Bitcoin still legal tender in El Salvador?
Not in the way it originally was. Bitcoin was made mandatory-acceptance legal tender in September 2021 under the terms of El Salvador's 2025 IMF program, that mandate was repealed.
Acceptance by private businesses is now voluntary, taxes are paid in dollars only, and the government's Chivo wallet is being wound down.
Does Ecuador tax FX conversions?
Not in this direction. Ecuador's 5% ISD (Impuesto a la Salida de Divisas) is a capital-exit tax on dollars leaving Ecuador, not dollars arriving. It is not relevant to an FX conversion, only for: profit repatriation, dividends, or any outbound transfer from Ecuador.
Why do remittances matter in Ecuador and El Salvador?
They're a major reason these economies have enough dollars to function; in El Salvador's case, remittances specifically exceed goods trade with the US. That inflow is part of what keeps the banking system liquid enough to make routine institutional payments happen.
Are there new trade agreements affecting Ecuador and El Salvador?
Yes, both recent. The US and Ecuador signed a Reciprocal Trade Agreement in March 2026; the US and El Salvador reached a framework agreement in November 2025, building on the CAFTA-DR relationship in place since 2006. Neither changes the payment mechanics, both ease tariffs on goods trade between the US and each country.
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