Free Under FTA but Not MFN: Why Your HS Code's Duty Depends on the Agreement

Your HS code does not have one duty rate — it has at least two, and the difference is decided by a piece of paper most shippers never read. We recounted the entire US tariff schedule and found that every paid eight-digit line opens its Special column with the word Free: the same product pays 6.4% MFN from Shanghai, nothing from Seoul, and up to triple digits under Column 2. Here is the census behind that claim, who benefits, and how to check your own line.

Importers treat the HTS like a price list: find the code, take the General rate, wince. But the schedule is really a matrix. The General column is the most-favoured-nation (MFN) rate — what the United States charges WTO members and all other normal-trade-relations origins. The Special column lists preferential rates negotiated in trade agreements and granted through preference programs. And a third, older column — Column 2 — lurks for origins without normal trade relations. Read the whole row and one shipment can carry three legal prices depending on where it sailed from.

The census: 1,777 lines where an agreement turns tax into zero

We filtered the 23,193-row schedule export down to its 3,362 eight-digit statistical lines, kept those whose General column charges a plain ad-valorem percentage greater than zero, and asked one question: does the Special column answer “Free” first? It did on every single one: 1,777 lines out of 1,777, or 100 percent. That is the population this article censuses — lines where an FTA partner pays exactly $0 while everyone else pays full freight.

Source: USITC Harmonized Tariff Schedule export, October 2026 vintage. Every figure on this page is recomputed from the raw schedule data at build time — nothing is hand-copied.

Two structural findings fall out of the same pass. First, preference in the current schedule is binary: whenever the Special column speaks first, it says Free — there is no half-price FTA tier on these lines, so the agreement question is pass/fail, not a discount negotiation. Second, free lanes travel in bundles: the median line names 17 partner codes in its leading Free group, which means competition for FTA-sheltered orders usually happens between dozens of treaty origins at once, not one lucky signatory.

Three prices on one line: worked examples

Program codes are the schedule’s own abbreviations: A Australia-list GSP carriers, AU Australia, BH Bahrain, CL Chile, CO Colombia, D Denmark, E Estonia, IL Israel, JO Jordan, KR Korea, MA Morocco, OM Oman, P the six CAFTA-DR states, PA Panama, PE Peru, S the USMCA partners (Mexico and Canada), SG Singapore.

The table below pairs pinned anchor products with the widest MFN-versus-Column-2 spreads in the census (highest gap per four-digit heading, tie-broken deterministically). All figures are read straight from the schedule export at generation time.

Check your own line in three minutes

The whole analysis compresses into a routine you can run before quoting an FOB price:

1. Find the ten-digit line. Search your product on the USITC schedule or our HS code lookup; the first eight digits decide the benefit, the last two only split statistical reporting.
2. Read the Special column left to right. If it opens with Free (...), scan the parenthetical for your market's program code -- KR for Korea, CL for Chile, CO for Colombia, S for USMCA (Mexico and Canada), SG for Singapore, among 30 codes that appear across the census population.
3. Confirm the claim conditions. A code in the list is necessary but not sufficient: the good must satisfy that agreement's rule of origin and carry a certification. When the cell shows a see-note such as “See 9822.04.01”, the lane runs through Chapter 98 or Chapter 99 and needs an extra paperwork hop.
4. Price all three columns. Quote MFN to non-partner buyers as the base case, $0 to certified partner buyers as the selling advantage, and check Column 2 only if your buyer's country lost normal trade relations treatment.

A note on what the census excludes

Three populations sit outside the 1,777-line headline and each deserves its own article. Compound-rate lines (percentages plus cents per kilo) and specific-duty-only lines charge duty without appearing here, though many still open their Special column with Free. Lines whose General column already reads Free need no agreement at all -- anyone in the world ships them at zero. And the ten-digit statistical breakdown beneath each eight-digit line inherits its parent's rates by construction, so counting those rows would triple-count the same benefit. The census counts each benefit exactly once.

Frequently asked questions

1. What is the difference between the General, Special and Column 2 rates?

All three are rates on the same HTS line. The General column is the MFN rate the United States charges World Trade Organization members and other normal-trade-relations origins. The Special column overrides it with preferential rates granted through trade agreements or programs -- and on every one of the 1,777 paid eight-digit lines in our census that override begins with the word Free for at least one partner. Column 2 is the statutory leftover rate for origins without normal trade relations; it is nearly always higher than the General rate, sometimes dramatically so.

2. How many US tariff lines are Free under an FTA but taxed at MFN?

In the October 2026 USITC schedule export (23,193 rows), 1,777 eight-digit lines carry a positive plain ad-valorem General rate and open their Special column with Free for at least one agreement partner -- 100 percent of the paid eight-digit ad-valorem population. Every such line therefore produces two legal invoices for identical goods: zero for a listed treaty partner and the full MFN percentage for everyone else.

3. How much duty does an FTA partner actually save?

It scales with the line's MFN rate. On the census population the median General rate is 6.4 percent, the 90th percentile is 16 percent and the maximum is 350 percent. Worked example: a $40,000 shipment of boneless beef under 0201.10.50 owes $10,560 at the 26.4 percent MFN rate from a non-partner, $0 from any of the eleven partners listed in the Special column, and $12,440 from an origin paying Column 2 (31.1 percent). Same box, three legal prices.

4. Which origins pay Column 2 rates?

Column 2 is the statutory (non-negotiated) rate applied to countries without normal-trade-relations treatment -- historically Cuba and North Korea, and since 2022 also Russia and Belarus after their NTR status was revoked. Most of the world trades at General/MFN terms instead, which is why the practical fork for an exporter is between General and Special, not Column 2.

5. How do I claim the FTA rate for my HS code?

Three checks. First, find your ten-digit line and read its Special column: if your market's code appears in the leading Free group, the lane exists. Second, confirm your product meets that agreement's rule of origin -- tariff shift or regional value content -- because origin is legal, not geographic. Third, hold a certification of origin and keep it; CBP can reconstruct the claim years later and bill the full General rate retroactively if the file is thin. Our 14-agreement eligibility checklist walks each step.

Where to check next

• 14-agreement FTA eligibility checklist
• preference-column census
• how tariffs stack on top of the base rate
• landed-cost duty calculator
• per-kilogram specific duties