If you have wondered how tariffs affect prices, the surprising part is the timing. A tariff is collected once, at the border, yet the effect on shelf prices can unfold over many months, and it can even reach products made at home. Here is how that chain works, based on published Federal Reserve research.
Educational explainer. Findings come from the cited studies, mostly about 2025 US tariffs, and the authors’ views are their own. This traces one force that affects prices and does not prove that any specific price change was caused by a tariff.
How tariffs affect prices, step one: the border
A tariff is a fee charged on goods entering a country. The importing business generally pays it to US customs, not the overseas seller. Researchers then asked what the importer does with a higher bill: absorb it, ask the supplier for a better price, or pass it on.
A New York Fed staff report on 2025 US tariffs found pass-through to border import prices of around 90%. That suggests foreign sellers cut their own prices only slightly, and most of the fee showed up in what importers paid. This step is nearly immediate, with import prices adjusting almost fully in the first month.
One detail headlines tend to skip: the announced rate and the rate actually collected are different numbers. The report puts the announced average at about 13% by the end of its sample, while the collected duty rate was about 8.5%, roughly two-thirds as much. Exemptions, the timing of shipments, and importers switching to lower-tariff suppliers all widen the gap.
Step two: why shelf prices move slowly
This is the part of how tariffs affect prices that surprises most people: the delay.
Once goods clear the port, they still have trucks, warehouses, wholesalers, and stores ahead of them. For typical consumer goods, those distribution margins are roughly half of the retail price, according to the same report. That matters because the tariff applies to the import value, not the shelf price.
How tariffs affect prices: a hypothetical example
Imagine a product that costs $10 at the border, plus $10 for shipping, storage, and the store. The shelf price is $20. A 100% tariff raises the import cost to $20, the other $10 stays the same, and the shelf price becomes $30. The shelf price rose 50% even though the import cost rose 100%. This is the same illustration used in a Federal Reserve staff note and is made-up for explanation, not a real product.
How tariffs affect prices: why the wait
That Federal Reserve note found that tariffs did not appear as a one-time price spike. Retail prices did not react significantly right after tariff announcements, and increases built gradually over several months. The authors point to a few reasons: many retailers had so far absorbed costs rather than passing them on, producers and retailers first sold through inventory stocked before the tariffs, and uncertainty about whether tariffs would last likely delayed pricing decisions that are hard to reverse.
Step three: why products made at home can change too
The New York Fed researchers describe three paths from a tariff to consumer prices.
- Direct. A tariffed import costs more at the border and, eventually, more in the store.
- Imported inputs. Many domestic products use imported parts or materials. When a tariff raises those costs, the maker’s costs rise, even though the finished product never crossed a border. In the study’s estimates, a 10% increase in the duty on imported inputs raised producer prices in consumer-goods industries by about 2.6%, with imported inputs averaging about 18% of variable costs. This effect became significant only after about 9 to 12 months. A cited wine study found a similar lag, with retail prices taking about a year to fully reflect a tariff.
- Competition. When tariffs make imported rivals more expensive, domestic makers face less pressure to hold prices down and may raise their markups. The effect is smaller: for an industry with a 34% import share, a 10% output tariff raised producer prices by about 0.7%.
Combining all three, the researchers estimated that about 26% of a tariff increase reached consumer goods prices within 12 months. About 64% of that came through the direct path and about 36% through prices of goods made at home.
The authors describe their results as preliminary. They compare goods more exposed to tariffs with goods less exposed, hold other forces such as exchange rates and interest-rate decisions fixed, and say this is not a forecast of overall inflation.
Why two studies report different numbers
A second Federal Reserve staff note tentatively found costs pass through almost completely, about dollar-for-dollar, within roughly five to nine months, with wide uncertainty. That sounds far from 26%, but the studies use different yardsticks. One measures dollars: if a retailer pays $1 more, how much does the shelf price rise? The other measures percentages: how a percentage tariff becomes a percentage price change.
In the hypothetical above, the tariff added $10 and the shelf price rose $10. That is full dollar-for-dollar pass-through, yet only a 50% price increase. The second note adds that tariffed goods sell for about 2.7 times their border price on average, so full pass-through on the percentage scale is about 37%. Different definitions explain part of the gap, and both describe prices rising gradually over months.
How tariffs affect prices: a simple way to read a price change
A tariff arrives in stages: first at the border, quickly, then in stores, more slowly, and last in goods made at home, over months. The announcement, the payment, and the price change are separate moments. When you see a price rise, three questions help locate where that product sits in the chain:
- Was it imported? That points to the direct path.
- Did it use imported parts or materials? That points to the input-cost path.
- Does it compete with imports? That points to the competition path.
Many forces move prices at once, so this is a way to understand timing, not to blame a single cause. If rising prices are squeezing your own budget, see our guide to zero-based budgeting, and browse more explainers in Why Is It So Expensive?.
Frequently asked questions
Who pays a tariff at the border?
The importing business generally pays the duty at the border. What happens next, whether it absorbs the cost, negotiates with suppliers, or raises prices, varies by business.
Why do prices rise months after a tariff?
Importers pay quickly, but stores often sell old inventory first, absorb some costs, and adjust prices gradually. Domestic goods that use imported inputs can take 9 to 12 months in the studies cited.
Is this financial advice?
No. This is general education. Brightward is independent and does not take a position on tariff policy.
