What tariff code do imported aluminium windows use, and how is the customs duty worked out?

Tariff classification decides the duty rate, and the duty rate is applied to a value that most importers misread. For an aluminium window package the classification question is usually straightforward, the valuation question is where money is actually made or lost, and the origin question decides whether the rate is 5 per cent or zero.

Which code a window package falls under

Doors, windows and their frames and thresholds for doors sit at 7610.10.00 in the Australian Customs Tariff. It is a six-figure subheading under heading 7610, aluminium structures and parts of structures, and it is the entry the Australian Trade Remedies Commission (ATRC) case page for investigation 691 lists for the goods it covers. The statistical code used in the tariff is 12.

Two things about chapter 76 are worth knowing because they explain why suppliers sometimes suggest a different code. The Additional Note to heading 7610 excludes plates, rods, angles, shapes, sections, tubes and pipes that still require further modification before use in a structure, such as cutting, drilling or bending. A container of bare aluminium extrusion that will be cut and assembled in Australia is therefore not classified in 7610: the extrusion belongs in 7604, bars, rods and profiles. A fabricated window, or a partially assembled frame, panel or sash assembly, does fall in 7610.10. The ATRC case description for investigation 691 uses exactly that split, covering windows and doors whether fully or partially assembled and excluding curtain wall.

That distinction is not academic. Chapter 76 sits in Section XV of the tariff, which deals with base metals, and the duty rate, the anti-dumping position and the origin rule can all differ between an extrusion and a finished window. An importer who lets a supplier write "aluminium profiles" on the commercial invoice for goods that are actually fabricated frames has created a classification problem for the broker at the border.

The two rates on the same line

The Australian Border Force (ABF) tariff schedule shows 7610.10.00 at 5 per cent, followed by CA:Free. The 5 per cent is the general rate, which applies to goods that do not qualify for a preferential rate. CA:Free is the rate for goods that are originating in China and claimed under the China Australia Free Trade Agreement. Both sit on the same tariff line, which is why two importers can bring in the same container and pay different amounts.

There is a third possibility that occasionally matters. Tariff Concession Orders are revenue concessions that exist where there is no known Australian manufacturer of substitutable goods, and around 15,000 of them are in force. There are TCOs keyed to 7610, including one for hinged aluminium hatches under 7610.10.00. To claim one the goods must both classify to that subheading and match the TCO description precisely, so a TCO is a possible extra saving for an unusual product, never a general answer for window packages. The ABF's own advice is to obtain a tariff advice to confirm eligibility before relying on one.

What the duty is calculated on

Duty is ad valorem, which means a percentage of the customs value. The ABF's valuation guidance explains that the customs value is normally the transaction value, the price actually paid or payable for the goods, subject to conditions such as the buyer and seller not being related in a way that affects the price. Where the transaction value cannot be used, there are five alternative methods in a fixed order: identical goods, similar goods, deductive value, computed value and fallback.

The customs value does not include international freight and insurance to Australia. Those are added later, when the value of the taxable importation is calculated for GST. It does include the cost of packing overseas, and any inland freight and inland insurance the buyer pays before the goods leave the place of export. So an FOB price plus the pre-export inland costs is close to the customs value; a CIF price is not, and a DDP price is not at all.

This is where a DDP quote misleads. If the supplier's price includes freight, insurance, duty and delivery, the number on the invoice is not the customs value and the broker has to work back to it before the declaration can be lodged. An importer who budgets duty as 5 per cent of the DDP price is overstating it, and one who budgets it as 5 per cent of the ex-works price is understating it. Ask the supplier for an FOB or ex-works figure and do the arithmetic from there.

The origin rule behind the free rate

ChAFTA does not give every good from China a free rate. Each tariff line has a product-specific rule of origin, and the rule for heading 7610 is a change in tariff heading. In plain terms, all the non-originating materials used to make the window have to change classification at the four-digit level as a result of production in China. Aluminium extrusion arrives in heading 7604 and leaves as a window in 7610, so that change happens; the rule is about the materials and the transformation, not about where the factory is located.

Satisfying the rule is one thing. Evidencing it is what the border asks for. The origin claim is made by the importer, either in writing or electronically at or before importation, on the basis that the goods are originating, and it has to be supported by a valid Certificate of Origin or Declaration of Origin. A certificate is issued by an authorised body in China, which for Australian imports means the General Administration of Customs of China or the China Council for the Promotion of International Trade. It covers a single shipment, may list up to 20 goods, and remains valid for 12 months. A declaration of origin, completed by the exporter, is accepted in place of a certificate where an advance ruling on origin covers the goods.

The consequence of arriving without either is a deposit equal to the non-preferential duty, refundable later if the paperwork is produced. The DFAT guide sets out the windows: a refund can be claimed for up to 12 months from the date of shipment where the certificate is issued retrospectively, and up to four years where a certificate was held at the time of importation. Paying the 5 per cent for a while is survivable. Discovering at the wharf that the certificate names a different exporter from the one on the invoice is worse, because the claim then fails on the evidence rather than on the rule.

When a tariff advice is worth the wait

Importers self-assess the classification, and penalties can apply for incorrect or misleading information. Where the classification is genuinely uncertain, the ABF offers a free tariff advice service, which produces an advance ruling recognised for five years from the date of application. The service standard is 30 days, though it can run longer at busy times, and the advice covers a specific good from a specific manufacturer rather than a product range.

For a standard residential window system the advice is rarely needed. It becomes useful in three situations: where the product sits on the boundary between an extrusion and a fabricated assembly, where a TCO is being claimed for a non-standard product, and where a package includes window wall or curtain wall elements near the edge of the 691 measure's scope. In each case the answer is worth having in writing before the order is placed, not after the container has arrived.

The practical sequence for an importer is short. Confirm the classification with the broker using the actual product, not the invoice description. Establish before the deposit whether an origin claim will be made and who will issue the certificate. Get an ex-works or FOB price for the valuation. And keep the certificate, the invoice, the bill of lading and the declaration consistent on the exporter's legal name, because that consistency is what makes the free rate hold.