From Axios--Supreme Court decision on Trump Tariffs--what it means--copied and pasted.

State of play: The overturned IEEPA tariffs mean that billions of dollars are now in limbo across America, according to economic research firm Trade Partnership Worldwide, based on trade from February to December 2025.

https://www.axios.com/2026/02/20/trump-tariffs-states-refunds?utm_source=firefox-newtab-en-us

That impact was largest for some of the biggest states, with California leading the way with $26 billion paid in IEEPA tariffs. It was followed by Texas ($11.4 billion), Georgia ($7.1 billion), Illinois ($6.7 billion) and New York ($6.7 billion).

How it works: The group uses data from the Census Bureau and the U.S. International Trade Commission to determine the tariffs that should be paid and then estimates excess tariff payments by using state-level census import data to assign them by product, country and month paid.

It says their estimated totals are likely conservative because it assumed any product subject to both IEEPA and another tariff authority, like section 202, fell under the latter. It also doesn't account for any IEEPA tariffs paid so far in 2026.