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Same Six Digits, Different Duty Rates: What an HS Code Actually Guarantees

A buyer in Mumbai emails a supplier about men's trousers and gets back a confident reply: “HS 6203.49, duty around 8%”. Three weeks later the shipment lands in the United States and the entry summary says 27.9%. Nobody lied. Both parties were looking at the same six harmonized digits — and the gap between them is exactly where this article lives.

The Harmonized System is an international treaty: its first six digits mean the same commodity in Delhi, Shanghai and Rotterdam. What it does not fix is the duty rate. Each importing country splits those six digits into its own national provisions, and the United States is among the most aggressive splitters in the world. If you price from the six-digit code alone, you are quoting a commodity, not a cost.

The six-digit contract — and where it ends

We ran the full October 2026 US schedule (23,193 lines) through a census that groups every eight-digit provision under its six-digit head and counts how many heads contain more than one General rate:

Source: computed live from data/hts.json (USITC REST export, generated 2026-10-09). The two buckets overlap — 40 headings do both — so together 353 of 1,673 headings, more than one in five, hide internal rate variation.

More than a fifth of all six-digit headings carry a spread of rates behind one innocent number. Here is what that looks like from the inside, chapter by chapter.

Tea: one word moves the rate from Free to 6.4%

Heading 0902 covers every kind of tea — green, black, and partly fermented. All of it enters the United States duty-free — unless it is flavored:

The flavoring agents, not the leaf, are what tariff law taxes differently. Note also the certified-organic suffix (.15): it changes paperwork, not the rate — the 6.4% applies identically to conventional and organic flavored tea.

Rice: six outcomes inside 1006, mixing cents and percent

Heading 1006 is the sharper lesson because the rate form itself changes:

Parboiled rice pays an ad-valorem rate while every other form pays cents per kilogram. Specific duties hit cheap and expensive cargo identically, which makes their real burden depend entirely on unit value — the mechanism we quantify in our per-kilogram AVE analysis. For basmati exporters the difference between 0.83¢/kg and 11.2% is the difference between a rounding error and a budget line.

Trousers: fiber weight swings 0% to 27.9% inside one heading

Back to the opening story. Heading 6203.49 (men's trousers, not denim, not wool-blend fine tailoring) contains these General rates simultaneously:

Fiber composition — declared and verified at the border — decides whether your margin survives. This is the same material-cliff pattern we mapped for bags (4202.92) and sneaker foxing bands (6404), just keyed to fabric weight instead of outer surface.

Jewelry and footwear: seven rates per heading is normal

The extreme cases cluster where Congress has used tariffs socially or industrially. Precious-metal jewelry (heading 7113) carries seven distinct General rates depending on metal and article value — gold rope-chain work at 6.3%, small-value pieces (≤$18/dozen) at 13.5%, ordinary gold articles at 5%, silver articles 5.2–7%. Footwear outdoes everything: inside 6402.9 the provisions run from 3% to 48%, a sixteen-fold spread that punishes precisely the cheap end of the market. Even basic cotton T-shirts (6109.9) span 2.6% to 32%.

If your buyer quotes HSN: why the Indian code doesn't transfer

Indian exporters work in HSN, and the first six digits align with the international HS — that part travels well. But the US schedule adds four more digits of national detail, and the preference layer almost never transfers at all. Of the 14,689 HTS lines that carry special-program designations, none references India: GSP benefits for Indian goods lapsed at the end of 2020 and have not been renewed. An HSN-level answer therefore misses both the provision split and any duty-free assumption built on expired programs. The safe workflow: map HSN → US eight-digit provision → General rate → special designation → origin-specific surcharges.

What you can rely on, and what to verify every time

The six digits reliably buy you three things: a stable commodity identity across countries, a place in every trade-statistics database, and a bounded neighborhood of possible rates. They do not buy you a number you can put in a proforma invoice. Before you commit a price:

• Resolve to the eight-digit provision, not the heading — that is where the General rate changes.
• Check the Special column for your destination-country program before assuming MFN applies.
• Screen for Chapter 99 stacks (Section 301, safeguard and retaliation measures) that ride on top of the base rate for your origin.
• Re-verify each quarter: exclusion windows open and close, and fees adjust every fiscal year.

Run any specific code through our landing-cost calculator to see the provision-level rate with fees included, browse the Federal Register trade notices for actions still working through the pipeline, or read how the ten-digit suffixes fit into this picture. For the residual-basket angle on the same phenomenon — why the catch-all "Other" line inside a heading usually costs more — see the Other-basket trap. If classification disputes recur in your category, the most-disputed-codes ranking shows where importers get burned first. To monitor rate changes on your own codes, create a watchlist.

Frequently asked questions

Why do different websites show different duty rates for the same HS code?

Because most sites quote a single line without telling you at which digit depth they stopped. The United States breaks each six-digit heading into eight-digit provisions with their own General rates, and further into ten-digit statistical lines. A site that shows only the cheapest or the first provision is quoting one slice of a range. In the October 2026 HTS export, 267 of 1,673 six-digit headings carry two or more distinct ad-valorem rates at the provision level, and another 126 mix duty-free with taxed provisions.

Do the extra digits after the sixth change the duty rate?

Sometimes yes. Eight-digit provisions are where the General (MFN) rate actually changes inside a heading — for example flavored tea at 6.4 percent versus other green tea entering free under 0902. Ten-digit suffixes exist for trade statistics and usually inherit the provision's rate unchanged, but the rate you owe is set by the eight-digit provision, so always resolve your product to that depth.

Is the duty rate the same whatever country the goods ship from?

Column 1 General (MFN) rates are the default regardless of origin, so the within-heading variation described here applies to every supplier. Two things then modify it: special program text in the Special column can reduce or zero the rate for FTA partners and certain programs, and Chapter 99 actions such as Section 301 add surcharges on top for specific origins. Both layers sit outside the six-digit code.

My supplier quoted the HSN code — is that enough for US customs?

It is the starting point, not the finish. The Indian HSN and the international HS agree at six digits, and US entry requires at least the eight-digit provision and reports ten. None of the 14,689 HTS lines carrying special-program text names India, because GSP lapsed for India in 2020 — so an HSN-level answer misses both the US provision split and any preference assumptions. Map the HSN to the US provision before pricing.

Where can I check the exact US rate before I order?

Look up the eight-digit provision in the current USITC schedule, confirm the General rate plus any special designation for your origin, then screen for Chapter 99 surcharges. ExportSonar's calculator resolves codes to the provision level and stacks known remedies automatically, and the trade-notices hub tracks new Federal Register actions that move rates between orders.

Sources: USITC Harmonized Tariff Schedule · CBP classification rulings (CROSS) · Federal Register MPF adjustment notice