Duty used to be the boring line in the landed-cost model — a rate looked up once and reused for years. It is now a moving policy variable, and brands that plan it as a fixed input are getting repriced by governments they do not vote for. This article lays out a scenario-based approach to landed-cost planning under tariff uncertainty, with the structural decisions that narrow the range. It is for founders and finance teams who need COGS assumptions that survive policy shifts.
The 2026 baseline: duty on every parcel
Start from what is now settled. The US $800 de minimis exemption — which let low-value parcels enter duty-free — was suspended globally on August 29, 2025. CBP rules published on June 24, 2026 moved that suspension onto an indefinite statutory footing and introduced new customs processes for postal shipments effective July 24, 2026, and statutory repeal of the exemption follows on July 1, 2027. The operational consequence is permanent: every US-bound commercial import carries duty and clearance regardless of parcel size. Business models premised on duty-free direct shipping have lost their premise, and landed-cost models with a zero duty line no longer describe reality.
The second lesson of the last two years is about shape, not level: policy moves in steps, and the steps are large. A planning method built on a single point estimate — one duty rate, assumed stable — fails not because any single rate guess is wrong but because the method has no way to absorb change when it comes. The fix is not better prediction. It is planning that expects the input to move.
Why point estimates fail, and what replaces them
Replace the single number with three scenarios, refreshed on a calendar rather than on news shocks:
| Scenario | Assumption | What triggers repricing | Operational response |
|---|---|---|---|
| Base | Current rules persist through the planning horizon | Scheduled quarterly review | Standard sourcing and mode plan |
| Adverse | Duty rates or treatment tighten on part of the catalog | Proposed rulemaking, announced inquiries, trade-action headlines on your categories | Reprice affected SKUs; shift mix toward unaffected lines; pull forward sensitive buys within reason |
| Severe | Structural change — a de-minimis-style step that redraws the cost floor | Suspensions, repeals, new clearance regimes as enacted | Restructure fulfillment model; re-land the catalog; renegotiate sourcing structure |
Each SKU's landed-cost model carries all three duty lines side by side. The base case prices the catalog; the adverse case sets the alert level — how much margin compression the current price can absorb before repricing is forced; the severe case is the contingency plan you draft while calm, because drafting it during the event is how brands end up shipping stock they cannot profitably clear. The figures that fill each line come from your broker and the applicable duty schedules at review time — not from memory, and not from this article, because the whole point is that the numbers move.
Classification discipline narrows the range
Between policy and your P&L sits one number you do control: the HS classification. Duty is computed on classified value at the applicable rate, which makes the classification a cost input with a compliance tail — a defensible code pays what the law actually requires, while a guessed code either overpays silently or underpays into an audit, with interest and penalties attached. Under tariff uncertainty, classification becomes even more valuable: rates move by category, so a misclassified SKU can be modeled in the wrong scenario entirely, and exemptions, quotas or exclusions that apply to your true classification will never reach you while the paperwork says otherwise.
The working standard: every SKU classified with a written rationale — construction, material, function — reviewed with your broker when rates move or products change, and kept consistent across every entry so your history supports you rather than contradicts you. The full method is laid out in the HS classification guide.
Structure decisions that duty planning forces
Three structural choices determine how much of the policy risk you can actually manage, as opposed to merely observe:
- Delivery terms and clarity. DDP-style all-in supplier quotes hide the duty line inside a single number — convenient until policy moves and nobody can say which party's assumption broke. Keeping the import structure itemized, with duty visible and your own broker's classification behind it, turns a policy shock from a renegotiation into a calculation.
- Consolidation and in-market fulfillment. Since every US parcel now clears as an import, consolidated inventory — ocean or air inbound, then domestic fulfillment — turns thousands of parcel entries into a handful of formal entries plus last-mile delivery. That structure is what makes duty planning tractable at all; parcel-by-parcel models re-expose you to policy at every order.
- Origin concentration. Concentration is a fact of the supply base worth stating plainly: China exported about RMB 2.27 trillion of cross-border ecommerce goods in 2025, up 5.4%, with Guangdong alone supplying 51.1% and the top five provinces 82.8%, per China's customs administration. Diversifying origin does not erase that gravity, and moving a SKU to a second country brings re-tooling, new MOQs, re-verification of quality and often higher unit costs — a real insurance premium. The disciplined version is selective: identify the SKUs whose adverse-scenario duty would break their unit economics, and develop a second origin for those specifically, not for the catalog.
You cannot control the rate. You can control whether the rate lands on a cost structure that is itemized, consolidated and classified correctly — which is most of the difference between a shock and a squeeze.
Do not forget the other borders
Policy risk is not uniquely American. The EU collects VAT at the point of sale on consignments up to €150 under IOSS and requires an EU-established responsible person and product information display under GPSR, in force since December 13, 2024 — compliance cost lines that belong in the model for European revenue. The UK runs its own parallel: VAT collected on orders up to £135, with UKCA marking alongside CE. None of these are tariffs in the US sense, but they share the planning property that matters: border costs are set by rules that change on legislative schedules, and the model needs a refresh trigger for each market, not just for US duty. The market-by-market mechanics are collected in the Europe and UK market guides.
The quarterly landed-cost review
- Re-confirm duty treatment for the catalog's HS classifications; log any proposed rules affecting your categories as adverse-scenario candidates.
- Refresh freight on the major lanes against current quotes, and check whether mode splits still match volume reality.
- Re-run the three duty scenarios per SKU; recompute margin compression at current selling prices, including the promotional floor.
- Update compliance cost lines per market — IOSS and GPSR for the EU, VAT treatment for the UK, clearance fees for the US.
- Flag SKUs whose adverse case breaks their unit economics into a second-origin development list; leave the rest alone.
- Circulate the refreshed floor prices to whoever owns promotions, so discounting does not silently breach the new floor.
Tariff planning is now a standing discipline rather than a one-time calculation. We build it into every program we run — the shipping operation prices duty-paid structures into lanes as standard, and the full policy timeline is covered in the de minimis briefing. To have the three-scenario model run on your catalog, send us the SKU list.
Frequently asked questions
How often should landed-cost models be refreshed for tariff changes?+
Quarterly on a calendar, plus on defined triggers. The calendar review catches drift that announcements obscure; the triggers — proposed rulemakings on your categories, enacted changes to exemption or clearance regimes, and classification or product changes on your side — catch the steps between reviews. Brands that refresh only when a change is enacted are always planning from behind, because the operational adjustments (pricing, sourcing, structure) each take weeks to apply after the number is known.
Should I move production out of China to avoid tariff risk?+
Treat it as a priced option, not a reflex. A second origin brings re-tooling, new minimums, a fresh quality-verification cycle and usually a higher unit cost — a real insurance premium paid every month, in exchange for protection against a risk that varies by SKU. The disciplined approach is selective: model each SKU's adverse-duty scenario, and develop a second origin only where that scenario breaks the unit economics. For most catalogs that is a short list, not the whole catalog.
Do low-value orders still clear duty-free anywhere?+
Not into the United States: the $800 de minimis exemption is suspended, the suspension is now indefinite under CBP rules with new postal clearance processes in force, and statutory repeal arrives in July 2027. Other markets retain low-value treatment of varying kinds — the EU collects VAT at checkout on consignments up to €150 and the UK on orders up to £135, which is collection, not exemption. Model duty on every US-bound unit regardless of size; that premise is now settled policy.
What single change most improves tariff planning for a small brand?+
Itemizing the border. Replace all-in supplier quotes with an itemized structure — your own classification, your own broker, duty visible as a line — and consolidate entries through in-market fulfillment rather than clearing parcel by parcel. Everything else, including scenario modeling, depends on knowing which number is which. A brand that cannot see its duty line cannot respond to its movement; a brand that can, treats policy change as arithmetic.
