Section 301: What Is Actually in Force
Section 301 is not one tariff. It is several actions with different scopes, and whether they stack is the question that decides the bill.
What decides the rate
Four 2018 lists carry 25% on Lists 1 to 3 and 7.5% on List 4A. The 2024 revision raised electric vehicles to 100%, semiconductors and solar cells to 50%, and batteries and critical minerals to 25%. The 2026 forced-labor action, effective 24 July 2026, adds 12.5% for China across 60 economies. List rates and the forced-labor rate stack; 232 does not behave the same way. A single blended 'Section 301 rate' does not exist.
Where this goes wrong
Exclusions expire on fixed dates and are revised by notice. USTR extended all 178 current China product exclusions on November 6, 2026, through 11:59 p.m. Eastern on January 9, 2027, effective for goods entered for consumption on or after November 10, 2026. This page explains the structure; it does not publish a code-by-code list, because a stale list is worse than no list.
Inputs and assumptions
| Item | Value | Note |
|---|---|---|
| Duty rate source | USITC HTS, release 2026HTSRev22 | Read at build time from the official schedule export. The general rate column. |
| MPF | 0.3464% of entered value, min $34.58, max $670.86 | CBP User Fee Table, FY2027. The ad valorem rate is statutory; the floor and cap are adjusted each October. |
| HMF | 0.125% of entered value, ocean cargo only | CBP User Fee Table. Not charged on air freight. |
| Customs value | Transaction value, normally the price paid for the goods | Freight and insurance are not part of US customs value, unlike CIF jurisdictions. |
Questions this page answers
Is there one Section 301 rate per country?
No. The 2018 lists apply by HTS code, and the 2026 forced-labor action applies by economy. They are separate measures, generally stack with each other, and interact differently with Section 232.
Why does this site not publish a code-by-code Section 301 list?
Because exclusions are added and expire on a rolling basis, and a list that is three weeks out of date produces a confident wrong answer. The page explains the structure and names the primary sources instead; those sources are linked on the page.
Does this estimate include anti-dumping duty?
No. Anti-dumping and countervailing duty are case-specific and can exceed every other layer combined, so they are outside the estimate by design. The calculator covers base duty, the Section 301 and 232 layers you enter, the merchandise processing fee and the harbor maintenance fee.
Data release: 2026HTSRev22. Content as of November 10, 2026. Found an error? Tell us and it gets corrected.