The Economics of Tariff Pass-Through

The Pass-Through Mechanism

When a tariff is imposed on an imported product, the cost flows through the supply chain in a predictable sequence: the importer pays the duty to CBP, then raises the wholesale price to cover the cost, the distributor adds their margin, and the retailer adds theirs. At each step, the tariff cost is marked up by each handler's profit margin, which means the final consumer price increase can actually exceed the tariff itself.

Consider a product with a landed cost of $10 and a 25% tariff. The tariff adds $2.50, making the imported cost $12.50. If the wholesaler applies a 30% markup and the retailer applies a 50% markup, the math works out as follows:

The $2.50 tariff became a $4.88 retail price increase, a 25% retail price jump on what was originally a quarter-rate tariff. This markup amplification is why the consumer impact of tariffs often exceeds the tariff rate itself.

Product Categories Most Affected

Tariff impact varies dramatically by product category. The products where consumers feel tariffs most are those with high duty rates, few domestic substitutes, and elastic supply chains:

• Apparel and footwear: Average tariff rates of 12-15%, with some categories above 30%. Nearly all clothing sold in the US is imported. Consumers have limited ability to substitute domestically, there is virtually no US mass-market clothing manufacturing. Browse Section XI (Textiles) and Section XII (Footwear) for specific rates.
• Consumer electronics: Base HTS rates are often low (0-3%), but Section 301 tariffs on Chinese electronics added 7.5 to 25%. Since most consumer electronics are assembled in China, these additional tariffs directly raised prices on laptops, monitors, headphones, and accessories.
• Food and agricultural products: Sugar, dairy, peanuts, and tobacco face some of the highest tariff protection in the HTS. US sugar prices are roughly double the world price, largely due to tariff rate quotas. See our most tariffed products guide for details.
• Steel and aluminum: Section 232 tariffs (twenty-five percent on steel, 10% on aluminum) raised costs for every downstream industry, automakers, appliance manufacturers, construction firms, and beverage canners. The American Institute for International Steel estimated the tariffs cost downstream industries $900,000 per steel job protected.
• Automotive parts: Tariffs on imported components raise vehicle production costs. Since modern vehicles contain 20,000-30,000 parts sourced globally, even small tariff increases on components accumulate across the supply chain.

What the Research Shows

The 2018-2019 US-China trade war created a natural experiment that economists have studied extensively. Key findings from peer-reviewed research:

• Near-complete pass-through: Amiti, Redding, and Weinstein (2019) found that US import prices rose almost exactly in proportion to the tariff rate, meaning Chinese exporters did not lower their prices to absorb the tariff. American importers and consumers bore essentially the full cost.
• Aggregate cost to consumers: The same researchers estimated the annual cost to US consumers and importers at approximately $51 billion from the tariffs in effect by late 2019.
• Washing machine case study: Flaaen, Hortacsu, and Tintelnot (2020) studied the 20% tariff on imported washing machines. Retail prices rose 12% within three months, and dryer prices also rose 12%, even though dryers were not tariffed, because manufacturers raised prices on both products in the bundle.
• Retaliation costs: Fajgelbaum et al. (2020) estimated that retaliatory tariffs from trading partners reduced US exports by $12.5 billion annually, particularly affecting agriculture.

When Tariffs Do Not Raise Consumer Prices

There are scenarios where tariff impact on consumers is muted:

• Strong domestic competition: When a competitive domestic alternative exists, importers and retailers may absorb part of the tariff cost rather than lose customers to domestic producers. Domestic producers gain pricing power but are constrained by competition.
• Supply chain shifts: Importers may switch to suppliers in non-tariffed countries. After US-China tariffs, many companies shifted sourcing to Vietnam, Thailand, India, and Mexico. This trade diversion reduces the consumer price impact but takes 1-3 years to fully materialize.
• Tariff exclusions: The US Trade Representative grants exclusions for specific products where no domestic alternative exists. Excluded products revert to the normal HTS rate without the additional tariff.
• Free trade agreements: Products qualifying under FTAs like USMCA enter at Special rates (often 0%). This is why the origin of a product matters enormously, identical goods from different countries face very different duty rates.

Practical Framework: Estimating Tariff Cost Impact

To estimate how much a tariff adds to what you pay as a consumer:

1. Look up the product's HTS code and General rate on PlainTariff.
2. Check for additional duties (Section 301/232) that apply on top of the base rate.
3. Identify the country of origin, FTA partners may qualify for lower Special rates.
4. Assume near-complete pass-through for products with few domestic alternatives.
5. Factor in markup amplification: the retail price impact is typically 1.5-2x the tariff rate.
6. Check whether supply chain alternatives exist, products easily sourced from non-tariffed countries will see less long-term price impact.

Frequently Asked Questions