What Is the OFAC 50 Percent Rule and Does It Affect Your Crypto Wallet?

TL;DR - The OFAC 50 percent rule blocks any company owned 50 percent or more by sanctioned persons, so its crypto wallets are off-limits even when they never appear on the SDN list.

Most wallet-screening advice tells you to check an address against the OFAC list and move on if it comes back clean. That misses a large category of blocked property. Under the 50 percent rule, entire companies - and every wallet they control - can be sanctioned without a single one of their addresses being published. Here is how the rule works and why it changes what a clean list check actually proves.

What is the OFAC 50 percent rule?

The rule is a long-standing piece of OFAC guidance. Any entity owned 50 percent or more, in the aggregate, directly or indirectly, by one or more blocked persons is itself treated as blocked - even if that entity is never named on the Specially Designated Nationals (SDN) list. In plain terms: if a sanctioned person owns most of a company, the company inherits the sanction automatically.

Two details do the heavy lifting. First, ownership aggregates: if two separate sanctioned parties each own 30 percent of the same firm, their stakes combine to 60 percent and the firm is blocked. Second, ownership counts even when it runs through layers of intermediate companies. The rule is about ownership, not control alone - a sanctioned person who merely influences a business without owning half of it does not trigger automatic blocking, though OFAC warns those situations still carry risk.

Does the 50 percent rule apply to crypto wallets?

Yes, and this is where it bites. A blocked entity's property includes the crypto wallets it controls. So the hot wallets of an exchange owned by sanctioned shareholders, or the addresses run by a front company an SDN set up, are blocked property in their own right - regardless of whether OFAC has ever published those specific addresses.

OFAC has said openly that its published crypto-address list is not exhaustive. The 50 percent rule is one of the biggest reasons why. A sanctioned operator can register a fresh company, route funds through brand-new wallets, and none of it shows up on a direct address lookup. The wallets are still legally off-limits the moment the ownership crosses the threshold. This is also how a restructured exchange - the pattern seen when Garantex activity reappeared under a successor brand - keeps its wallets blocked even before regulators publish new addresses.

Why does a clean list check still miss blocked wallets?

A direct list lookup answers one narrow question: is this exact address published on the SDN list? The 50 percent rule creates a whole class of wallets that answer "no" to that question while remaining fully blocked. The gap is not an edge case - it is the predictable result of sanctioned actors using ordinary corporate structures.

It matters because US sanctions are strict liability. You can violate them with no knowledge that a counterparty was a 50 percent-owned blocked entity, and intent affects only the size of the penalty, not whether a breach occurred. A wallet that looks clean on a quick check, but belongs to an unlisted blocked company, is exactly the kind of exposure that surfaces later when an exchange or bank runs deeper analytics on your deposit. Our guide on how many hops from a sanctioned address still flag your wallet covers the related problem of indirect exposure.

How do you screen a wallet for 50 percent-rule exposure?

You cannot catch 50 percent-rule entities with a list lookup alone, because the whole point is that they are not on the list. You can confirm an exact match yourself on the OFAC Sanctions List Search portal, but it only returns published names and addresses - it will not reveal a wallet owned by an unlisted blocked company. Screen your wallet with Plastron to check it against the full OFAC set and trace sanctions, mixer, and stolen-funds exposure across Ethereum and six more chains in one pass.

Beyond automated screening, the practical defences are the same ones compliance teams use. Know who actually owns the counterparty you are dealing with, treat newly registered exchanges and opaque ownership as a reason to dig deeper, and keep records that show you screened before you transacted. For more on why a single firm can score a wallet differently, see how a crypto address gets added to the OFAC list in the first place.

FAQ

Does the 50 percent rule apply to me as an individual?

Yes. The rule binds all US persons and anyone otherwise subject to OFAC jurisdiction, whether you are a business or an individual. If you receive crypto from a wallet controlled by a 50 percent-owned blocked entity, you have dealt in blocked property regardless of your role.

What if two sanctioned people each own less than half?

Their stakes are added together. If their combined ownership reaches 50 percent or more, the entity is blocked. This aggregation rule is what catches structures designed to keep any single owner below the threshold.

Is an entity blocked if a sanctioned person controls it but does not own half?

Not automatically. The 50 percent rule turns on ownership, not control. OFAC has cautioned that doing business with entities controlled by blocked persons still carries sanctions risk, so control without majority ownership is a warning sign rather than a safe harbour.

How would I know a wallet belongs to a 50 percent-owned entity?

You usually cannot tell from the address alone, which is the core problem. The link runs through corporate ownership that is not on chain. Blockchain analytics firms build attribution that maps unlisted wallets back to sanctioned owners, and that attribution is what screening tools rely on to flag exposure a raw list check would miss.