How Often Is the OFAC SDN List Updated? What Compliance Teams Get Wrong

The OFAC Specially Designated Nationals (SDN) list is updated multiple times per week — typically two to four times, and occasionally more than once on the same day during periods of geopolitical action. There is no fixed publication schedule. OFAC updates the list whenever new designations, amendments, or delistings are ready, publishes them in the Federal Register and to the ofac.treasury.gov download endpoints simultaneously, and the changes take legal effect immediately on publication.

In practice, over the past several years, the SDN list has averaged roughly 150–200 updates per year, adding several thousand new entries and modifying or removing hundreds more. Major events — the 2022 Russia designations, the 2023 Hamas response, ongoing narcotics and cybercrime actions — produce clusters of updates in short windows. Between events, weeks may pass with only minor amendments.

The most common compliance failure is monthly or quarterly re-screening. If your team downloads the SDN list on the first of the month and screens against that snapshot until the next batch, you are systematically exposed to every designation OFAC makes in between. A customer you cleared on the 2nd can be sanctioned on the 10th and continue transacting on your platform until the next refresh. Regulators know this, and matters requiring attention on this exact pattern are common in exam letters.

The right cadence is 'on list change'. Whenever OFAC publishes an update, your screening system should ingest the new data and re-screen every active customer and every open transaction against the delta. For most operations, that means a job that polls the OFAC download endpoints at least once per hour and triggers a re-screen when the file hash changes. Compare against the EU (updated multiple times per month), UK OFSI (updated ad hoc, usually within hours of designations), and UN (updated on Security Council action) — each has its own cadence, but all should be treated the same way: re-screen on change, not on calendar.

SanctionsScreening polls OFAC, EU, UK, and UN source feeds every few hours, normalizes and deduplicates the data across regimes, and exposes a single fuzzy-matched search interface — so your team never has to track individual list cadences. Free search at sanctionsscreening.io, no signup. See the pricing page for batch CSV screening, ongoing re-screening triggered by list updates, PDF audit reports, and API access.