# The Cabinet Duty Math Nobody Models: Origin Tiers, the 15% Floor, and Metal Hidden in the Box
For most of the past two years, the cabinet trade has argued about a single number. First it was 25%. Now it is 50%, effective January 1, 2027 [2]. That headline is the least useful figure in the schedule.
The rate that actually lands on a container of cabinets is a function of three things that rarely appear in a dealer's pricing spreadsheet: the origin tier the goods fall into, a floor mechanism that fills the gap up to 15%, and whether the shipment carries derivative duties computed against the full customs value rather than the metal inside it [2][4]. Two dealers can buy the same box at the same FOB, from the same factory, and land it at meaningfully different costs depending on how carefully they have mapped origin and classification — and one of them may not know which dealer they are until the entry summary clears.
What follows is not legal advice and does not substitute for a licensed customs broker's classification opinion. It is an attempt to describe, precisely, where the money is in the current schedule, using what the published trackers actually say.
The Duty Attaches to Parts, Not Just Finished Boxes
The first misread is scoping. The cabinet tariff line is applied by HTSUS classification, and the classifications named are 9403.40.9060, 9403.60.8093 and 9403.91.0080. Critically, coverage includes finished kitchen cabinets and vanities as well as parts imported for use in kitchen cabinets and vanities [2].
That single clause changes who has a problem. It is not only the importer of finished Chinese or Vietnamese cabinetry. It is the North American manufacturer that imports doors, drawer boxes, face frames, end panels or components for assembly. It is the RTA program that ships flat and assembles domestically. It is the dealer-owned shop that buys imported dovetail drawers to hit a price point on a semi-custom line. A company that markets itself as domestic while running imported components through the plant still carries a duty line on those components — and if nobody has mapped that bill of materials to HTSUS codes, that line is unmodeled.
Practically, this argues for a parts-level classification audit before the January 1 step-up, not after. The audit question is not "are we an importer?" It is "which of our SKUs contain a component that entered under 9403.91.0080 or an adjacent line?"
Three Tiers, and a Floor Most Dealers Misread
The tracker does not publish a single cabinet rate. It publishes a schedule keyed to origin [2]:
- UK-origin products: 10%.
- EU Member State-, Japan-, South Korea-, and Taiwan-origin products fall into a separate tier with staggered effective dates — EU and Japan from October 14, 2025; South Korea from November 14, 2025, modified December 31, 2025; Taiwan from May 1, 2026.
- All other countries: 25% from October 14 through December 31, 2026, then 50% starting January 1, 2027.
The cabinet line itself is listed as implemented, effective October 14, 2025 [2].
The 15% floor, explained
The middle tier carries the mechanic that gets misquoted most often. For those origins, the schedule specifies 0% for all products with a Column 1 duty rate of 15% or higher, and 15% minus the Column 1 duty rate for products with a Column 1 rate below 15% [2].
Read carefully, that is not an add-on. It is a floor. Where a cabinet line's Column 1 rate already sits at or above 15%, the additional layer contributes nothing. Where it sits below 15%, the additional layer fills the gap so the combined burden reaches roughly 15%. The practical consequence: diversifying within that tier buys very little on the duty line, because the tier converges on the same floor. Diversifying out of the "all other countries" bucket is where the 25-point-to-40-point spread lives.
That reframes origin work. Substantiation is not a compliance chore bolted onto procurement; it is price-setting. If a supplier cannot document origin convincingly, the goods do not get the tier rate — they fall to the 25%-then-50% bucket [2]. A factory's address on an invoice is not origin substantiation. Bills of materials, mill certificates and production records are.
What the tiers do to program mix
A 10% UK program and a 50% other-country program differ by forty points of customs value. That is wide enough to restructure an assortment rather than renegotiate a price. The pattern that emerges for most dealers is three-lane: hold one import program for opening price points, move the middle of the line to domestic or to a favorable-tier origin, and treat the top as domestic or semi-custom where the customer is buying the door, the finish and the box rather than the opening price.
The mistake to avoid is applying the new math uniformly across a line. Segment first, then re-source the segment that actually moved.
The Sleeper: Derivative Duties on Full Customs Value
The second misread is more expensive. Section 232 derivative coverage extends to products containing covered metal — the tracker-style summaries put a fastener, wiring harness, cabinet or appliance squarely in scope. And under the proclamation effective April 6, 2026, duties on steel, aluminum and copper articles and their derivatives apply to the full customs value of the imported product, not just its metal content [4].
That is a step change in calculation, not in coverage. A cabinet with forty dollars of metal in it does not carry duty on forty dollars. It potentially carries duty on the full customs value of the cabinet [4].
Where metal hides in a cabinet
Run the list: legs and frames, toe-kick and leveling systems, pulls and knobs, hinges and slides, glass-door frames, stainless appliance garages, undercabinet lighting housings, wire pull-outs, decorative metal grilles. Each is a candidate for derivative treatment. Each substitution — aluminum for steel, domestic hardware for imported — changes the spec sheet the designer has already drawn into the plan.
This is where design and procurement have to sit in the same room. A hardware package chosen for aesthetics three revisions ago may now be the most duty-exposed line item in the kitchen, and the cheapest fix may be a specification change made at the design desk rather than a supplier change made in the purchasing office.
Section 301 is not standing still either
The largest current Section 301 actions focus on forced labor. In July 2026, the United States imposed additional duties across 60 economies for failure to prohibit and effectively enforce against imports produced with forced labor — meaning investigations now reach practices deep within supply chains, not just those of individual exporters [4].
For a dealer who has just moved a program from one country to another to escape the 50% bucket, this is the second-order risk. A new origin carries its own 301 exposure, and the due diligence required to qualify a new factory is now compliance due diligence as much as it is a factory visit and a sample order.
The Q1 2027 Calendar Is an Operations Document
The Q4 market conditions view from DPR Construction lays out three dates that should be on a dealer's wall [1].
January 2027. Tariff increases on select imports that were delayed for one year take effect, specifically naming upholstered furniture, kitchen cabinets and vanities [1]. This corroborates the schedule step-up in the tariff tracker [2].
January 12, 2027. The USMCA public comment deadline — described as an opportunity to influence future North American trade policy affecting cross-border material sourcing [1]. Dealers with Canadian or Mexican component flows have a narrow window to make their case, and the comment file is also a useful read on where cross-border rules may move.
Mid-January through early March 2027. Chinese New Year disruptions — factory closures, increased shipping demand, blank sailings and post-holiday congestion. Chinese New Year falls on February 6 [1].
The operational read: the step-up and the pre-holiday shipping crunch land in the same eight weeks. Any program that needs to arrive before the Lunar New Year factory shutdown has to be booked well ahead of it, and any quote issued in December has to state whether pricing is tied to order date or entry date. If the duty step changes between the two, the dealer carries the difference unless the paperwork says otherwise.
Where Domestic Shops Should Press the Advantage
The forty-point spread between tiers is not only a cost problem. It is a differentiation budget, if it is spent on something the customer can see.
Hardwood plywood demand is being supported by exactly the forces the cabinet trade rides: rising demand for custom and semi-custom cabinetry, steady growth in renovation and remodeling, increasing use of hardwood plywood in commercial office fit-outs, and a preference for sustainable and certified interior materials [3]. The counterweight is real — competition from melamine-faced boards and other decorative panels limits growth in price-sensitive markets [3].
That is a segmentation map, not a mandate. Upgrade the core and the interior finish on the lines where the buyer is already specifying custom, and leave the value line on decorative panel where price governs. Attempting a wholesale substrate upgrade across a full catalog converts a tariff advantage into an inventory problem.
Duration Risk: Do Not Assume the Schedule Holds
The final consideration is time horizon. Tariffs are now a political variable, not just a customs one. Renewed US-Canada talks are underway, with Lutnick described as a key figure [6], and the Canadian exposure runs through supply-chain linkages rather than direct trade alone [5]. The 2026 tariff round has also pushed companies and consumers to prepare for supply-chain shocks [7] — a reminder that origin diversification carries its own operational risk.
For dealers, that argues against multi-year exclusive import agreements without exit ramps, and for dual-source approvals baked into design specifications so a program can be flipped without redesigning the kitchen.
A Procurement Checklist for the Next Eight Weeks
- Map every SKU — including imported components — to HTSUS, with attention to 9403.40.9060, 9403.60.8093 and 9403.91.0080 [2].
- Model landed cost twice, at 25% and at 50%, and build a separate derivative line for metal-bearing components at full customs value [4].
- Require origin substantiation from every supplier, in writing, before quoting the tier rate [2].
- Rewrite quote validity language to tie price to entry date, not order date.
- Book pre-Chinese New Year volume now, with February 6 as the anchor [1].
- Segment the assortment before re-sourcing it, and spend the spread on substrate and finish only where the buyer is already specifying custom [3].
- Calendar the January 12 USMCA comment deadline if cross-border sourcing is material to the business [1].
The 50% number will keep making headlines. The number that decides whether a program survives 2027 is the one a dealer builds from origin tiers, the 15% floor and full-customs-value derivative math — and most of that work has to be finished before the ball drops.