Tariffs can raise the prices of affected goods. Whether they raise overall inflation, by how much and for how long depends on the goods covered, supplier responses, business margins and the wider economy. A 10% customs duty does not mean a 10% increase in every retail price.
Published October 9, 2026. Research discussed below was published October 6; its estimates and forecasts are distinguished from our hypothetical examples.
First, separate who pays from who bears the cost
The importer of record is responsible for customs duties. The economic burden can then move through the supply chain: a supplier may lower its price, an importer may accept a smaller margin, or a retailer may charge customers more. Read who pays tariffs for the difference between payment at customs and the final burden.
For the basic calculation and classification workflow, start with what tariffs are and how they work.
What the October 2026 New York Fed research says
The October 6 New York Fed article estimates that a one-percentage-point increase in average tariffs raises consumer goods prices by roughly 0.25% after a year. It finds both direct effects through imports and indirect effects through domestic production costs and pricing.
The authors estimate a 2.9-percentage-point contribution to goods inflation by February 2026 in their sample. Their comparison covers 67 non-oil goods categories and excludes services. It holds broader economic factors fixed; it is not a statement that tariffs caused all US inflation.
The article's forward projections are model forecasts, not later observed outcomes. Lower year-over-year inflation can coexist with a price level that remains higher than it would have been without tariffs. These findings are research estimates, not a universal forecast for a particular product or business.
A tariff is assessed on customs value, not the shelf price
Consider this original, hypothetical example. An imported item has a customs value of $80, and an assumed single ad valorem tariff adds $8. Other business costs are $30 and the selling price is $150. Before duty, the simplified contribution margin is $40; afterward, someone has to absorb the additional $8.
| Illustrative response | New selling price | Simplified margin | Who absorbs the added cost? |
|---|---|---|---|
| Importer keeps its price | $150 | $32 | Importer absorbs $8 |
| Importer passes half onward | $154 | $36 | Customer $4; importer $4 |
| Importer passes all onward | $158 | $40 | Customer absorbs $8 |
The full-pass-through retail increase here is $8 ÷ $150, or about 5.3%, despite a 10% tariff on customs value. This table assumes no supplier discount, no volume response and no other cost changes. It is not a New York Fed estimate or a prediction for an actual shipment.
Use the landed-cost calculator with your own assumptions. A calculator estimates costs; it does not determine how much a customer will accept in a price increase.
Price level and inflation rate answer different questions
The price level asks what an item costs. Inflation measures how prices change over time. Suppose an item rises from $100 to $105 and then stays at $105. The price remains higher, but its annual rate of increase eventually falls as the earlier $100 comparison drops out.
That distinction matters when reading a headline saying tariff-related inflation has peaked. It does not necessarily mean prices returned to their old level.
Why the answer varies by product
Tariff exposure depends on classification, origin and entry timing. Commercial effects also depend on substitute products, contracts and margins. A grocery category cannot stand in for an entire economy, and a national estimate cannot supply a company's selling price.
For a concrete product-policy example, see Mexican fresh tomato tariffs. For policy status, use current US tariff layers; for the distribution of benefits and costs, see protective tariffs and who benefits.
What an importer can do next
- Identify the product and look up its HS / HTS classification.
- Verify origin, entry date, base duty and additional duty layers against official sources.
- Keep unverified rates unknown instead of treating them as zero.
- Model landed cost, then compare absorbing costs, sharing them and changing prices.
- Record the assumptions and open questions for supplier or broker review.
For the wider cost model, read landed cost, FOB and CIF.
Common questions
Does a 10% tariff cause 10% inflation?
No. Customs value differs from retail price, affected imports are only part of spending, and firms may absorb or redistribute costs. The effect on overall inflation requires evidence beyond the tariff percentage.
Does the foreign country pay the tariff?
The importer pays customs. Foreign suppliers can bear part of the economic cost through price concessions, but that is a separate question from who pays the customs authority.
Can paying the duty guarantee that a shipment is admissible?
No. Classification, import restrictions and forced-labor enforcement can require separate review. See the forced-labor Section 301 guide for the distinction between a duty program and import-prohibition enforcement.
This article is educational. The examples are arithmetic scenarios, not filing determinations or macroeconomic forecasts.
