Unlike your bank or credit card, most crypto platforms answer to their own terms of service, not a fee-notice law.
In most states, yes — crypto platforms can generally change their fees with little or no advance notice, because there's no broad federal law requiring otherwise. This is a real gap compared to other financial products: credit card issuers, for example, must generally give 45 days' notice before a significant rate or fee change under the Truth in Lending Act. Nothing equivalent exists at the federal level for crypto trading platforms.
A handful of states have stepped in with their own rules. California's Digital Financial Assets Law (DFAL), which took effect July 1, 2025, requires platforms licensed to serve California residents to disclose, among other things, a resident's right to at least 14 days' prior notice before a change to the fee schedule or other terms that materially affect their account. New York's long-standing BitLicense regime and Louisiana's licensing law impose their own, different disclosure requirements. Outside states with this kind of licensing law, you're relying on whatever the platform's own terms of service say.
Outside California, New York and Louisiana, there currently isn't a state-specific law requiring crypto platforms to give advance notice of fee changes, so the platform's own terms of service are what actually governs — and most are written to give the platform maximum flexibility to change fees at will. Even within California's law, the 14-day requirement applies specifically to licensees under the DFAL; it's worth confirming a given platform is actually licensed and covered rather than assuming the protection applies. More states are expected to pass their own crypto licensing frameworks over time, so the protections available to you may expand depending on where you live and which laws are in effect when you're trading.
Check whether your state has its own crypto licensing law before assuming you have no fee-notice protection at all — this is a fast-changing area, with more states expected to follow California, New York and Louisiana.