Exchange Rate Lock

Overview

What it means and why it matters

An exchange rate lock is a time-limited commitment to use a specified conversion rate for a defined payment or settlement amount, subject to stated conditions. It reduces uncertainty but may not cover every late or partial payment.

How it works in practice

When an invoice is created, the service quotes the crypto amount for a fiat-priced order and records a deadline. If the customer pays correctly inside the valid window, the provider applies the agreed rate or hedging arrangement. Outside the window, a new quote or exception policy may be required.

Technical detail without the jargon

Document whether the lock starts at invoice creation, transaction detection or chain acceptance. Define treatment of partial, late and multiple transfers and quote granularity. A ‘locked’ rate is meaningful only if the counterparty is contractually or operationally bound to honor it.

A deeper point to understand

A rate lock may protect the merchant, customer, provider or some combination, depending on contract terms. Ask which party absorbs market movement during the lock. Where payment can arrive after the quote expires, the application should present an intelligible next step rather than silently modifying the customer’s obligation.

Common mistakes and limitations

A browser displaying a live indicative rate does not create an enforceable guarantee. Do not promise protection against network delays unless the provider’s terms expressly cover them.

What to check in a real payment system

Show customers when the lock expires and what event satisfies it. Test transactions broadcast at the edge of expiry and confirmed afterward. Keep the original quoted rate in your records, even if a late-payment policy eventually applies a replacement quote.

Related concepts

Crypto Settlement, Crypto Payout, Network Fee.

Further reading

Bank for International Settlements — Basel Committee Publications.