Two importers buy the same stainless door handle from the same factory in the same month. One pays no duty; the other pays up to 30%. The difference is a single piece of paper, and whether the exporter was in a position to obtain it.

Where the product sits in the tariff

Door and window hardware — handles, hinges, mountings and fittings for buildings — is classified under heading 8302, most often at subheading 8302.41 for fittings suitable for buildings. Shower-door handles fitted to glass normally land in the same place. Classification is decided by the customs authority at entry; get a ruling if the value at stake justifies it, and never let a supplier’s invoice be your only classification opinion.

Southeast Asia: the certificate is worth more than the negotiation

Thailand is the fastest-growing market in the region for this heading — CMH’s reading of 2025 Comtrade data shows imports up about 23% year on year. Under the ASEAN–China Free Trade Agreement, hardware of Chinese origin can enter at 0% with a valid preferential certificate of origin (the ASEAN–China form, still widely called Form E). Without it, the MFN rate applies — for this category, as high as 30%.

The catch nobody mentions in the quotation. A preferential certificate of origin is issued to a registered exporter. A factory whose business licence does not include import and export, and which has no customs consignor registration, cannot obtain one in its own name. The goods then ship under a trading company’s name — which is fine, provided the trading company can and will issue the certificate, and provided the invoice, the bill of lading and the certificate all name the same party. Ask, at enquiry stage: “Who is the exporter of record, and can they issue an ASEAN–China certificate of origin?”

Getting this wrong is expensive in a way that is hard to unwind: duty is assessed at entry, and a certificate produced afterwards may or may not support a refund depending on the country and the timing.

The Gulf: low duty, high documentation

The GCC applies a common external tariff — 5% on most goods of this type, with some lines higher — so duty is rarely the deciding cost. What decides the cost in the Gulf is conformity: Saudi Arabia requires SABER certification for regulated products including door and window hardware, and the UAE has its own conformity route. In other words, the Gulf charges you in paperwork rather than in tariff. On the other hand, it is the largest regional market in this category: the six GCC states together account for roughly USD 267 million of annual imports under this heading on the most recent published years, with Saudi Arabia the biggest single buyer.

Mexico: check the current schedule before you quote

Mexico is an attractive third market for shower and glass hardware because of the size of its aluminium-and-glass trade, but its tariff schedule for imports from countries without a trade agreement has been revised repeatedly, most recently in a decree published at the end of 2025. Rates in this category can be materially higher than the Gulf. Verify the current line rate in the official gazette before you build a landed-cost model, and re-verify it before each season.

What the exporter must actually have

  • Import/export rights in the business licence — or a named trading company that has them
  • Customs consignor registration, without which no export declaration is filed in the factory’s own name
  • Ability to issue the relevant preferential certificate of origin for your destination
  • Invoice descriptions that match the certificate and the packing list, model number by model number

Those four bullets are a yes/no interview, and they take five minutes. They are also the questions that separate a factory that has exported from a factory that has only ever sold to exporters — a distinction that does not appear anywhere in a product catalogue.

A landed-cost sketch worth doing before the first order

  1. FOB price per piece — and confirm whether that is per piece or per pair
  2. Freight and insurance to your port
  3. Duty at the correct line rate, with and without a preferential certificate
  4. VAT or equivalent at import
  5. Conformity cost — testing plus certificate fees, amortised over the programme rather than the first container
  6. Inspection, if you use a third party

Run it twice: once assuming the certificate of origin arrives, once assuming it does not. If the second version breaks your margin, the exporter’s registration status is not an administrative detail — it is the deal.

How to read the numbers here. Trade figures are CMH’s reading of UN Comtrade import data for the 2025 reporting year, taken from each country’s own reported aggregate lines. Duty rates and certification requirements are quoted from the published tariff and standards documents current in September 2026; classification and duty are decided by the customs authority at the time of entry, not by a supplier or by this page.