A Formula di u Costu di Sbarcu 2026: Dazi, Sezione 301 è Sezione 232 Accumulati
A container that penciled out at a 15% duty rate in January can arrive owing 40%, 60%, or more by the time it clears customs. That is not a hypothetical for freight forwarders and importers working the China–U.S. trade lane in 2026 — it is the new baseline. Between a Supreme Court ruling that struck down the 2025 reciprocal tariff schedule, the rise and expiration of the Section 122 global surcharge, a fresh Section 301 forced-labor duty that now touches dozens of economies, and a rebuilt Section 232 metals and semiconductor regime, the number of moving parts in a single landed cost calculation has multiplied. Importers who still price shipments off a single HTS duty line are, in practice, guessing.
This article walks through the landed cost formula as it actually works today: which tariff programs stack, which ones replace each other, how the fees around freight and customs entry add up, and what a real shipment looks like once every layer is applied. It closes with practical guidance for shippers trying to keep margins intact in a tariff environment that has changed direction three times in the past twelve months.
Why Landed Cost Math Broke in 2026
For most of the past decade, calculating an import duty was mechanical: look up the HTS code, read the Column 1 general rate, multiply by the customs value, done. Section 301 tariffs on Chinese goods complicated that picture starting in 2018, but the arithmetic was still simple addition. What changed in 2025 and 2026 is the sheer number of overlapping legal authorities the U.S. government has used to impose duties, each with its own scope, expiration date, and stacking rule.
The starting point for understanding today’s stack is what fell away. The 2025 IEEPA reciprocal tariff schedule, which ran as high as 145% depending on country of origin, was struck down by the Supreme Court on February 20, 2026, and CBP has not been able to collect it since. In its place, the administration leaned on a flat 10% Section 122 global surcharge — but Section 122 authority carries a hard 150-day statutory limit, and that surcharge expired on July 24, 2026. It was replaced, without a gap, by a new Section 301 forced-labor duty of 10% or 12.5% depending on a country’s labor-compliance status, now covering dozens of trading partners including China. Layered against all of that, the older, product-specific Section 301 China tariffs (Lists 1 through 4A, running 7.5% to 25%) never went away, and the Section 232 national-security tariff program — steel, aluminum, copper, autos, semiconductors, and timber — has expanded and been restructured twice in 2026 alone, most recently on June 8, 2026.
The practical result is that a shipment’s true duty exposure now depends on a stack of independent legal instruments, several of which have moved dates in the same calendar year. A landed cost model built in March 2026 is already unreliable by September.
The Core Landed Cost Formula
Despite the complexity, the underlying formula has not changed — only the number of terms inside it. Landed cost is the total, all-in cost of getting a unit of product from the factory floor to the buyer’s door, and every component belongs to one of three groups: the product itself, transportation and insurance, and customs costs.
Written out, the formula freight forwarders use to quote a full landed cost looks like this:
Landed Cost = (Unit Price × Quantity) + International Freight + Insurance + (Customs Value × Total Duty Rate) + Merchandise Processing Fee + Harbor Maintenance Fee + Brokerage Fees + Inland Freight + Other Charges
The variable doing the most damage to 2026 budgets is “Total Duty Rate.” That single term is no longer one number pulled from a tariff schedule — it is the sum of every applicable program layered onto the same customs value, and getting it wrong by even one program is often the difference between a profitable SKU and a loss-making one.
Layer by Layer: What Actually Stacks
Not every tariff program adds to every other one. Some stack cumulatively on the same customs value; others are mutually exclusive and only the higher of the two applies. Getting this distinction right is the single most common source of landed cost errors we see at Topway Shipping when reviewing a new client’s costing sheet.
Daziu di Base MFN
Every import still starts with the Most Favored Nation rate published in Column 1 General of the Harmonized Tariff Schedule. This is the baseline that has existed for decades, ranging from duty-free on many raw materials to 30% or more on selected finished goods such as footwear and apparel. Every other program in this article stacks on top of, not instead of, this base rate.
Section 301 — Legacy China Lists
The original Section 301 action against China, covering Lists 1 through 4A, is still fully in force and carries rates from 7.5% up to 25% depending on the product and list. A separate fentanyl-related Section 301 duty, reduced from 20% to 10% under a November 2025 agreement between Washington and Beijing, also continues to apply to most Chinese-origin goods. Both of these layers add directly to the MFN rate.
Section 301 — New Forced-Labor Tariff
Effective July 24, 2026, USTR finalized a new Section 301 action targeting forced labor in supply chains, applying a 10% or 12.5% duty across roughly sixty economies depending on each country’s compliance status. This tariff replaced the expired Section 122 surcharge and, unlike its predecessor, carries no built-in expiration date. It stacks with the legacy China lists and the fentanyl tariff for goods of Chinese origin, but it does not stack with Section 232 sector duties — where a product is covered by a Section 232 sector rate, that rate substitutes for the forced-labor country rate rather than adding to it.
Section 232 — Sector Duties
Section 232 duties are assessed by product sector rather than by country of origin, and after the April 2026 and June 2026 restructurings they now apply to the full customs value of a covered article — not just the value of the metal content, as under the older methodology. Steel, aluminum, and most copper articles carry a 50% rate; a broader set of metal-containing derivatives carries 25%; and a 15% transitional rate applies to certain metal-intensive industrial and electrical-grid equipment through the end of 2027. Semiconductors used in advanced computing picked up an additional 25% Section 232 duty as of January 2026, and automobiles, trucks, and softwood lumber each carry their own sector-specific rates. The defining rule for Section 232 is that it generally does not stack with the Section 301 forced-labor country rate or the (now-expired) Section 122 surcharge — the sector rate simply takes over. It does, however, sit on top of any legacy Section 301 China list duty that also applies to the same product.
Fees That Apply Regardless of Duty Status
Two federal fees apply to nearly every formal entry independent of the tariff stack. The Merchandise Processing Fee is 0.3464% of the entered value, subject to a minimum of roughly $31.67 and a cap of several hundred dollars per entry; it applies to both air and ocean shipments. The Harbor Maintenance Fee, at 0.125% of cargo value, applies only to shipments arriving by ocean vessel. Brokerage fees and inland trucking or drayage from the port to the warehouse are commercial charges rather than government fees, but they belong in the same landed cost line because they are unavoidable for a cleared, delivered shipment.
How the Layers Combine: Summary Table
The table below summarizes how each 2026 tariff program behaves — whether it stacks additively with the others or substitutes for a competing rate.
| U prugramma | Tariffa Tipica (2026) | S'applica à | Stacking Behavior |
| Daziu di Base MFN | 0% – 30%+ | Tutte l'impurtazioni | Base layer; everything else adds on top |
| Section 301 Legacy Lists (China) | 7.5% - 25% | China-origin goods on Lists 1–4A | Additive with MFN and fentanyl duty |
| Section 301 Fentanyl Duty | 10% | Merce d'origine cinese | Additive with MFN and legacy lists |
| Section 301 Forced-Labor Duty | 10% o 12.5% | ~60 economies incl. China | Additive with legacy China duties; replaced by Section 232 rate where both apply |
| Section 232 Metals (steel/aluminum/copper) | 10% / 15% / 25% / 50% | Covered metal articles & derivatives | Replaces the forced-labor country rate; stacks with legacy Section 301 |
| Section 232 Semiconductors | 25% | Advanced AI chips & derivatives | Sector-specific; check exemptions |
| Tariffa di Trattamentu di Merchandise | 0.3464% (min ~$31.67) | Tutte l'entrate formali | Fee, not a duty; always applies |
| Tariffa di mantenimentu di u portu | 0.125% | U trasportu marittimu solu | Fee, not a duty; always applies |
A Worked Example: Steel-Component Electronics from China
Numbers make the stacking rules concrete. Consider a $20,000 shipment of Chinese-origin electronic equipment with a steel housing classified as a Section 232 derivative article, moving by ocean freight with $850 of inland trucking on the U.S. side.
| Cumpunente di u costu | Rate | Quantità (USD) |
| Costu di u produttu | - | $20,000.00 |
| Daziu di Base MFN | 8.5% | $1,700.00 |
| Section 301 Legacy List Duty | 25% | $5,000.00 |
| Section 232 Derivative Steel Duty | 25% | $5,000.00 |
| Tariffa di Trattamentu di Merchandise | 0.3464% | $69.28 |
| Tariffa di mantenimentu di u portu | 0.125% | $25.00 |
| Trasportu terrestre | - | $850.00 |
| Costu Totale Landed | - | $32,644.28 |
Note that the forced-labor Section 301 country rate does not appear in this table at all — because the steel housing is covered by a Section 232 sector duty, the substitution rule applies and the forced-labor rate is set aside. An importer who added the forced-labor rate on top of the Section 232 rate here would overstate the landed cost by roughly $2,500 and misquote the customer; one who forgot the Section 232 rate because they only checked Section 301 would understate it by $5,000. Both mistakes are common, and both are exactly why product-by-product HTS classification, not a general country rate, has to drive the quote.
Where a Freight Forwarding Partner Changes the Outcome
The math above assumes the classification, origin documentation, and program eligibility are all correct — and that assumption is where most landed cost surprises actually originate. A single HTS code can sit at the intersection of a legacy Section 301 list, a Section 232 derivative annex, and a forced-labor country determination simultaneously, and knowing which combination applies requires checking current CBP guidance against the specific product, not a general rate table. This is exactly the gap a capable freight forwarder is built to close.
Since 2010, Topway Shipping, headquartered in Shenzhen, China, has been a professional provider of cross-border e-commerce logistics solutions. The founding team brings more than 15 years of experience in international logistics and customs clearance, with a strong focus on the China–U.S. lane — the exact corridor where Section 301 and Section 232 stacking now does the most damage to unprepared importers. Topway’s services span the full logistics chain, including first-leg transportation from Chinese factories, overseas magazzinu in the destination market, customs clearance, and last-mile delivery to the end customer, alongside flexible full-container-load (FCL) and less-than-container-load (LCL) ocean freight services from China to major ports worldwide.
For importers navigating the 2026 tariff stack, that end-to-end footprint matters in a very concrete way: a forwarder that also handles customs clearance can flag a Section 232 derivative classification or a forced-labor country exposure before the container leaves China, rather than after it arrives and the duty bill is already fixed. Pairing accurate HTS classification with the right mix of FCL and LCL routing, overseas warehousing to smooth out inventory timing, and coordinated last-mile delivery lets shippers model landed cost with real numbers instead of last quarter’s assumptions — which, given how often the rules have moved in 2026, is the difference between a shipment that protects margin and one that quietly erases it.
Practical Strategies for Managing the 2026 Stack
Reclassification review is the first and cheapest lever most importers have not pulled. Because Section 232 derivative annexes and Section 301 exclusion lists are both product-specific rather than category-wide, two nearly identical SKUs can land at meaningfully different total duty rates depending on exact tariff classification, metal content threshold, or documentation of U.S.-origin inputs. A classification audit against the current annexes, done before the next purchase order rather than after entry, routinely finds savings that a general rate check misses.
Origin diversification still helps, but less dramatically than it did under the old IEEPA schedule. With the reciprocal tariff regime struck down, the spread between countries has narrowed — the new forced-labor duty is only 10% to 12.5% regardless of origin for most covered economies, and USMCA-qualifying goods from Canada and Mexico remain the clearest exemption. Shifting a Section 232-covered product’s country of origin, by contrast, does little, since the sector rate travels with the product’s metal content and classification rather than the country it ships from.
Two dates are worth flagging on any 2026 planning calendar. November 10, 2026 is when the current tranche of Section 301 exclusions is set to expire unless USTR extends them, and it is also the expiration date of the current Trump-Xi tariff reduction agreement unless both governments renew it. Either lapse would push effective rates on a wide range of Chinese-origin goods back up with very little notice, so shipments timed to clear before that date carry materially lower risk than ones timed after it.
Finally, building in a buffer for fee minimums matters more for smaller shipments than large importers often expect. The Merchandise Processing Fee’s roughly $31.67 minimum can push the effective duty rate on a low-value formal entry noticeably higher than the headline percentage suggests, which is worth modeling explicitly rather than folding into a rounding error.
cunchiusioni
The 2026 tariff landscape rewards precision and punishes shortcuts. With the IEEPA reciprocal schedule struck down, Section 122 expired, a new Section 301 forced-labor duty now in force, and a restructured Section 232 metals and semiconductor regime stacking or substituting depending on the product, there is no longer a single number an importer can look up and trust. The landed cost formula itself is unchanged — product cost, freight, duty, and fees — but the duty term inside it now requires checking multiple overlapping authorities against a specific HTS code, origin, and entry date every time a purchase order is placed. Forwarders and importers who rebuild their costing models around that reality, and who lean on partners with real customs clearance experience on the China–U.S. lane, are the ones protecting margin while the rules keep moving.
S & P
Q: Do Section 301 and Section 232 duties always stack on top of each other?
A: Not always. Legacy Section 301 China list duties generally do stack with Section 232 sector duties on the same product. But the new Section 301 forced-labor country rate does not stack with Section 232 — where a product is covered by a Section 232 sector rate, that rate replaces the forced-labor rate rather than adding to it.
Q: What happened to the Section 122 global tariff?
A: Section 122 authority carries a hard 150-day statutory limit. The 10% global surcharge imposed after the 2025 IEEPA reciprocal tariffs were struck down expired on July 24, 2026, and was immediately replaced by the new Section 301 forced-labor duty.
Q: How is the Section 232 metals duty calculated now?
A: Since April 6, 2026, Section 232 duties on steel, aluminum, and copper apply to the full customs value of the covered article and its derivatives, rather than only to the value of the metal content as under the prior methodology.
Q: Is the customs value the same as the product’s ex-works price?
A: No. Customs value generally includes the price paid for the goods and, depending on the incoterm, may include inland freight to the port of export. It does not automatically include ocean freight, insurance, or U.S. import fees, which is why landed cost and customs value are calculated as separate line items.
Q: Can a freight forwarder help lower my actual duty rate?
A: A forwarder cannot change statutory tariff rates, but accurate HTS classification, correct origin documentation, and awareness of current exclusion lists can prevent overpaying duty that was never legally owed in the first place — which is often where the real savings are found.
