On 6 April 2026 the arithmetic behind every metals entry into the United States changed direction. Section 232 duty used to attach to the steel or aluminum content of a derivative article, so a machine with a small amount of steel in it paid a small amount of duty. It now applies to the full customs value of a covered article, regardless of metal content. The tariff code you put on the line decides whether the whole invoice pays 50 percent, 25 percent, 15 percent, 10 percent or nothing. That makes classification the single largest cost variable on a metals entry, and it is why a spreadsheet of inherited codes is now a live financial exposure. This is a buyer's comparison of the tools that make those calls across a real catalog.
What is the best HS code classification software for steel and aluminum importers?
For a US importer of metal articles or metal-intensive products, the best fit is a classifier that returns the full 10-digit HTSUS code from a plain-English description, shows the chapter notes and General Rules of Interpretation behind it, and attaches the Chapter 99 Section 232 subheading on the same screen. TariffWise does that from $59 a month, with bulk catalog runs on the $199 Growth plan. Descartes CustomsInfo and Thomson Reuters ONESOURCE suit enterprises that also need multi-country content on an annual contract. A licensed customs broker is still the right answer for contested derivative lines, antidumping scope and the entry itself.
What makes metals different from every other catalog is that two questions have to be answered, not one. First, what is the article: a pipe fitting, a bracket, a transformer, a gearbox. Second, does it sit on a Section 232 annex, and if so which one. A tool that answers only the first question leaves you with a code and no idea what it costs.
The April 2026 rule that changed the math
The proclamation signed on 2 April 2026 took effect for goods entered for consumption on or after 12:01 a.m. EDT on 6 April 2026. The headline change is the valuation basis: duty applies to the full customs value of the article, not to the value of the metal inside it. CBP set out the filing instructions in CSMS 68253075.
A worked example makes the size of it obvious. Take an assembled industrial machine entered at $15,000 with roughly $1,000 of steel in it. Under the content-value approach the 232 exposure was a few hundred dollars. Under the full-value approach, a derivative line at 25 percent is $3,750 on the same entry. The code did not change. The base changed.
The rate now depends on which annex the article lands on, and CBP has published the Chapter 99 subheadings that carry each one.
| HTSUS subheading | Covers | Rate |
|---|---|---|
| 9903.82.02 | Articles of aluminum, steel or copper on the primary annex | 50 percent |
| 9903.82.03 | Listed goods with less than 15 percent of the applicable metal by aggregate weight | 0 percent |
| 9903.82.04 | UK-origin aluminum and steel articles | 25 percent |
| 9903.82.05 | UK-origin derivative articles | 15 percent |
| 9903.82.06 to 9903.82.08 | Goods made abroad from at least 95 percent US-melted-and-poured steel or US-smelted-and-cast aluminum | 10 percent, or no additional duty depending on the column 1 rate |
| 9903.82.12 | Derivative articles from column 2 countries | 25 percent |
| 9903.82.14 to 9903.82.17 | Russian steel, copper and derivative articles | 10, 25 and 50 percent depending on the metal and form |
Two more instructions are worth writing on a wall. Goods listed as articles or derivatives of more than one metal are subject to only one of the rates, not to both stacked. And the 15 percent threshold at 9903.82.03 does not rescue anything classified in Chapters 72, 73, 74 or 76; if the article is itself a metal article, the weight test does not apply.
Steel and aluminum classification tools compared
| Tool | Code depth | Shows why the code applies | Best for | Published pricing |
|---|---|---|---|---|
| TariffWise | 10-digit HTSUS with the 2026 duty stack and landed cost | Yes, GRI and chapter notes on every result | US metal and machinery importers who want codes and duty on a monthly plan | $59, $199, $499 a month |
| Descartes CustomsInfo | Multi-country tariff content library with AI assist | Reference library rather than per-item rationale | Teams that research rulings before committing to a code | Not published |
| Thomson Reuters ONESOURCE | Enterprise global classification across 220 plus countries | Content-led, with research staff behind the data | Large enterprises with export controls and screening in scope | Not published |
| Avalara Tariff Code Classification | 6 or 10 digit, automated, self-serve and managed tiers | Rulings and justification on the Managed tier | Multi-country catalogs, or buying classifiers as a service | Not published |
| Gaia Dynamics | HS and HTS with ruling citations | Step-by-step reasoning with citations | Teams wanting citations across several countries, yearly billing | $99, $379, $1,399 a month, billed yearly |
| iCustoms | HS and HTS selection inside a UK and EU declaration platform | Classification module with AI assistance | Businesses filing into HMRC CDS or Ireland Revenue | Not published. Capterra lists from £1,000 a month |
| Licensed customs broker | 10-digit HTSUS | A written opinion you can keep on file | Contested derivative lines, antidumping scope and the entry | About $50 to $200 per product review |
Only vendor-published prices appear above. Where a vendor quotes privately the table says so rather than guessing. The wider field is laid out on the best HS code classification software roundup, and the European declaration platform in that list is compared in detail on the iCustoms alternative page.
Where a metals catalog actually goes wrong
The classic error is assuming that anything made of steel belongs in Chapter 72 or 73. It does not. Chapters 72 and 74 cover the metal in its primary and semi-finished forms: ingots, bars, rods, sheet, coil, wire, tube. Chapter 73 covers articles of iron or steel, and Chapter 76 covers aluminum and articles of aluminum. But the moment an article becomes a recognizable machine, appliance, vehicle part or electrical device, it leaves the metals chapters entirely and goes to Chapter 84, 85, 87 or 90, where it is described by what it does rather than what it is made from.
That used to be a paperwork distinction. It now decides your duty base. A steel pipe fitting in Chapter 73 pays on the primary annex. A pump housing that reads as part of a pump goes to Chapter 84 and is only exposed if that specific tariff line sits on the derivative annex. Two products with the same steel content, the same supplier and the same mill certificate can carry completely different exposure because one is a fitting and one is a part.
| Product | Typical chapter | Why |
|---|---|---|
| Hot-rolled coil, bar, rod, plate | 72 | Iron and steel in primary and semi-finished forms |
| Pipe fittings, structural sections, fasteners, containers | 73 | Articles of iron or steel, described by form not function |
| Copper cathode, wire, tube | 74 | Copper and articles of copper, now inside the 232 scope |
| Aluminum extrusions, sheet, foil, castings | 76 | Aluminum and articles of aluminum |
| Pumps, valves, gearboxes, compressors | 84 | Machinery is described by function, not by material |
| Transformers, switchgear, motors, cable | 85 | Electrical apparatus has its own headings |
| Vehicle parts and assemblies | 87 | Section XVII, subject to its own exclusions for parts of general use |
The last row is the one that trips people up in both directions, because the parts-of-general-use exclusion pulls bolts, screws and springs back into Chapter 73 even when they were made for one vehicle. We work through that logic on HS codes for auto parts, and the same reasoning applies to fasteners sold into machinery and construction.
The 15 percent rule is a data problem, not a tariff problem
This is the part most importers underestimate. To claim the zero rate at 9903.82.03, the entry summary line has to report the aggregate weight of the applicable metal in kilograms as a second quantity. Not a percentage, not an estimate on the invoice: a weight, per line, that you are attesting to.
Very few product masters hold that number. It lives in an engineering bill of materials, in a supplier's material declaration, or in nobody's system at all. For an importer with a few hundred finished goods, assembling metal weight per SKU is a project measured in weeks, and it has to be repeated whenever a supplier changes a component. Classification software does not solve that on its own, but the tools that are worth paying for at least tell you which SKUs need the number, which is the difference between auditing 40 lines and auditing 4,000.
The practical sequence is: classify first, identify which codes sit on an annex, then chase metal weight only for that subset. Running it the other way round means asking every supplier for data you mostly will not use.
Melt and pour, smelt and cast: the other field nobody has
Separately from the weight, CBP requires filers to continue reporting the country of melt and pour for subject steel and steel derivative products, and the country of smelt and cast, plus the secondary country of smelt, for aluminum. Country of origin is not a substitute. Steel melted in one country, rolled in a second and fabricated in a third has an origin determined by the usual rules and a melt-and-pour country that may be none of those three.
That field comes from mill test certificates, which arrive as PDFs from the supplier and usually stop at the receiving dock. Importers who have solved this generally solved it by making the certificate a condition of the purchase order rather than a document chased after the fact. The same discipline pays off downstream, where the higher duty shows up on broker invoices that somebody has to approve, and where automating the approval of those supplier and broker invoices keeps a 50 percent line from being paid on autopilot.
What it costs to classify a metals catalog
Cost scales with how many distinct products you have, not with container volume. A fabricator importing forty line items repeatedly has a small classification problem and a large duty problem. A distributor with nine thousand part numbers has both.
| Catalog size | Sensible route | Rough cost |
|---|---|---|
| Under 50 products | Classify by hand in the tool, send the two or three contested lines to a broker for a written opinion | $59 a month plus one or two broker reviews |
| 50 to 1,000 products | Bulk CSV run, review anything flagged low confidence or sitting on an annex | $199 a month during the audit, dropping after |
| Over 1,000 products | API against the product master, scheduled re-check when the annexes move | $499 a month, under a dollar per classification at volume |
| Contested derivative lines | A licensed broker or a CBP binding ruling | $50 to $200 per review, or the ruling process |
The comparison people should actually run is against the duty, not against a broker's fee. On a container of derivative articles entered at $200,000, the difference between a line that sits on an annex and one that does not is tens of thousands of dollars. Against that, the cost of the software is a rounding error, which is the unusual position this category is in right now. The per-plan detail is on the classification pricing page, and the split between doing it in-house and paying per line is set out in customs broker vs classification software.
How often do the annexes change?
Often enough that a one-time classification project is not a plan. The formal inclusions process that ran through 2025 has been replaced by rolling determinations from Commerce and USTR with discretionary public input, which means additions can appear without a fixed submission window to watch. Any product that sits just outside an annex today should be treated as a product that might be inside it next quarter.
There is also live litigation. Cases at the Court of International Trade challenge how the duty is calculated, so entries filed now may be worth protesting later. That is an argument for keeping the reasoning behind every code, not just the code, because a refund claim two years from now will be built on the file you kept this month.
Do I still need a customs broker if I use classification software?
Yes, for the entry, and for anything genuinely contested. Under 19 U.S.C. 1484 the importer of record carries the duty of reasonable care regardless of who typed the code, and a broker's written opinion is evidence that you exercised it. What software changes is the volume of routine decisions the broker has to bill for. Most importers end up with a hybrid: the tool classifies the catalog and flags the hard lines, the broker rules on those and files the entry.
If the codes need to land back in an ERP or a product information system rather than a spreadsheet, the HS code API returns the code, the confidence and the duty per line so the write-back is a scheduled job. Category-level starting points for other product families are collected on HS code lookup by product.
Where to start this week
Take the twenty highest-value lines you imported in the last quarter, classify them cold, and mark which ones return a Chapter 99 subheading. That list is your exposure, and it is almost always shorter than people fear and more expensive than they expect. Everything else, including the metal weight chase and the mill certificates, follows from knowing which products are actually on an annex.