Section 301 Tariffs and CPG COGS: How to Calculate the Real Impact on Your Margins
A 25% tariff on an ingredient that makes up 8% of your COGS sounds manageable. Here is how to calculate whether it actually is, and what to do about it.
Section 301 tariffs are additional duties imposed by the U.S. Trade Representative on goods imported from China, originally authorized under Section 301 of the Trade Act of 1974. The tariffs were first imposed in 2018 and have been modified multiple times since. As of 2026, rates on Chinese imports range from 7.5% to 145% depending on the product category, stacking on top of the standard Most Favored Nation (MFN) duty rate.
For CPG brands sourcing ingredients, packaging, or equipment components from China, Section 301 tariffs can represent a significant and sudden increase in landed COGS. The problem is that most brands do not calculate the full impact correctly. They look at the tariff rate in isolation rather than modeling how it flows through the BOM and into their channel margins.
How Tariffs Stack: Base Duty Plus Section 301
The total import cost for a Chinese-origin ingredient is not just the Section 301 rate. It is the base MFN duty rate plus the Section 301 rate, applied to the customs value of the shipment. The customs value is typically the transaction value: what you paid the supplier, plus insurance and freight to the U.S. port of entry (CIF value).
For example, citric acid (HTS code 2918.14.0000) has a base MFN duty rate of 0% and a Section 301 rate of 25%. So the total duty is 25% of the CIF value. Ginger (HTS 0910.11.0000) has a base MFN rate of 1% and a Section 301 rate of 7.5%, for a total of 8.5%. Packaging components like printed folding cartons (HTS 4819.20.0040) can carry a base rate of 0% plus a Section 301 rate of 25%.
The calculation is: Total Duty = CIF Value x (Base MFN Rate + Section 301 Rate). Then: Landed Cost = CIF Value + Total Duty + Customs Broker Fee + ISF Filing Fee + Port Handling.
Worked Example: Citric Acid in a Sports Drink
A sports drink brand sources citric acid from China. Here are the numbers before and after a Section 301 tariff increase from 25% to 50%.
| Item | Before Tariff Increase | After Tariff Increase |
|---|---|---|
| Supplier price (CIF) | $0.80/kg | $0.80/kg |
| Base MFN duty (0%) | $0.00 | $0.00 |
| Section 301 tariff | $0.20 (25%) | $0.40 (50%) |
| Broker + ISF + port fees | $0.04 | $0.04 |
| Landed cost per kg | $1.04 | $1.24 |
| Usage per unit (12oz can) | 4g = $0.0042 | 4g = $0.0050 |
| COGS impact per unit | baseline | +$0.0008 per unit |
On a single ingredient, the impact looks small. But citric acid is not the only Chinese-origin input. If the same brand sources packaging components, certain vitamins, and flavor compounds from China, the stacked impact across all affected ingredients can be $0.05-$0.15 per unit. On a product with a $1.80 landed COGS and a 15% net margin on wholesale, a $0.10 COGS increase is a 37% reduction in net margin per unit.
The Sourcing Scenario Comparison
When a tariff increase makes a Chinese-origin ingredient significantly more expensive, the question becomes whether switching to a domestic or third-country supplier is worth it. The answer requires a full sourcing scenario comparison, not just a price comparison.
A domestic citric acid supplier might quote $1.40/kg with no tariff. That is more expensive than the pre-tariff Chinese price of $1.04/kg, but cheaper than the post-tariff Chinese price of $1.24/kg. However, the domestic supplier has a 12-week lead time versus 6 weeks from China, a higher minimum order quantity, and a different specification that may require a reformulation. The true cost comparison has to include the cost of carrying more safety stock (due to longer lead time), the one-time reformulation cost, and the risk of supply disruption during the transition.
| Factor | Chinese Supplier (Post-Tariff) | Domestic Supplier | Indian Supplier (No Tariff) |
|---|---|---|---|
| Price per kg | $1.24 | $1.40 | $1.10 |
| Lead time | 6 weeks | 2 weeks | 10 weeks |
| Min order qty | 1,000 kg | 500 kg | 2,000 kg |
| Safety stock needed | 2 weeks | 1 week | 4 weeks |
| Reformulation required | No | Possibly | No |
| Tariff risk | High | None | None |
| True annual cost (10,000 kg) | $12,400 | $14,000 | $11,000 + higher inventory carry |
How to Calculate the Portfolio Impact
The right way to assess a tariff change is not to look at one ingredient in isolation. It is to identify every Chinese-origin input in every BOM across your entire product portfolio, calculate the new landed cost for each one, and then propagate those cost changes through the BOM to see the COGS impact on every SKU and the net margin impact on every channel.
This is the calculation that most brands cannot do quickly. It requires knowing the Chinese-origin percentage of every ingredient, having current CIF prices for all of them, and being able to run the BOM math across the full portfolio. A brand with 15 SKUs and 40 ingredients might have 8-12 Chinese-origin inputs. Doing this manually takes days. Done wrong, it leads to pricing decisions based on incomplete data.
Manual Process vs. Guidance
| Task | Manual Process | With Guidance |
|---|---|---|
| Identifying affected ingredients | Review each supplier invoice and country of origin documentation manually | Guidance tags each ingredient with country of origin and flags all Chinese-origin inputs |
| Calculating new landed cost | Pull up each ingredient, apply the new tariff rate manually in a spreadsheet | Guidance recalculates landed cost for all affected ingredients when tariff rates are updated |
| Propagating through BOMs | Update each BOM that uses the affected ingredient, recalculate COGS for each SKU | Guidance propagates the cost change through all BOMs automatically |
| Seeing channel margin impact | Rebuild the channel P&L for each affected SKU manually | Guidance recalculates net margin per channel for every affected SKU instantly |
| Running a sourcing scenario | Build a separate spreadsheet model for each alternative supplier scenario | Guidance runs a sourcing scenario comparison against your current cost structure |
Frequently Asked Questions
What is Section 301 and how is it different from normal import duties?
Section 301 tariffs are punitive duties imposed specifically on Chinese-origin goods as a trade policy measure. They stack on top of the standard MFN duty rate that applies to all countries. Normal MFN duties on food ingredients are often 0-5%, while Section 301 adds 7.5-145% on top.
Which food ingredients are most affected by Section 301 tariffs?
Citric acid, certain vitamins (B12, C), ginger and ginger extracts, certain packaging components (printed cartons, flexible packaging), and processing equipment parts are among the most commonly affected categories for food brands.
Can I apply for a Section 301 tariff exclusion?
USTR has run exclusion processes in the past where importers could apply for product-specific exclusions. These exclusions are time-limited and product-specific. Check the USTR website for current exclusion opportunities for your HTS codes.
How do I find the HTS code for my ingredient?
Use the USITC's HTS search tool at hts.usitc.gov. Search by ingredient name or chemical description. Your customs broker can also confirm the correct classification and the applicable duty rates.
How quickly should I switch suppliers when a tariff increases?
Do the full sourcing scenario comparison first. A tariff increase does not automatically mean switching suppliers is the right move. Factor in lead time, minimum order quantities, safety stock requirements, reformulation costs, and supplier reliability before deciding.
Slater built Guidance after running Claros Farm, a certified organic CPG brand sourcing ingredients from 14 countries. He wrote Guidance to solve the operations problems he could not find software for.
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