An American company importing goods from abroad, not the foreign exporter, pays a tariff directly to U.S. Customs and Border Protection at the border. Federal Reserve research published in 2026 found that cost is then passed through to consumers on a near dollar-for-dollar basis within five to nine months, adding roughly 0.8 percentage points to core inflation by early this year.
Tariffs have moved from a niche trade-policy term to a recurring line item in household budgets and corporate earnings calls. The mechanics of who writes the check, who sets the rate, and who ultimately absorbs the cost are governed by customs law and documented in real time by government economists, not by the political rhetoric surrounding any single tariff announcement.
Who legally pays a tariff to the government?
The importer of record, typically the U.S. company bringing goods into the country, pays the duty directly to U.S. Customs and Border Protection at the time of entry. CBP accepts payment through electronic transfer and other approved methods, and interest accrues on delinquent amounts under federal regulation if payment is not received by the deadline. The foreign manufacturer or exporter is not the party CBP bills.
How is the duty rate on a specific product set?
Every imported item is assigned a rate under the Harmonized Tariff System, which CBP describes as providing duty rates for virtually every category of good. Classifying a product correctly can be technical: CBP's own guidance uses the example of a wool suit, where the rate depends on factors including the country of origin of the wool, where the garment was assembled, and the composition of its lining. Importers can research likely rates through the U.S. International Trade Commission's tariff database or request a binding ruling from CBP, but CBP makes the final determination of the correct rate, not the importer.
How does the cost move from the importer to a store shelf?
Once an importer pays a tariff, it has three broad options: absorb the added cost, negotiate a lower price from its foreign supplier, or raise the price it charges retailers and, eventually, consumers. Research summarized by Forbes found that pass-through to consumers has generally been high across recent tariff episodes, though the split between importers, exporters, and consumers has shifted over time as companies adjust pricing and sourcing strategies. The same analysis noted the split has not always favored the same party historically: looking back at 19th-century U.S. tariffs, it found episodes in which domestic exporters bore a disproportionate share of the cost through reduced competitiveness abroad, rather than consumers paying more at home. Which pattern holds in a given case depends on how easily buyers can substitute other suppliers, how competitive the retail category is, and how much time has passed since the tariff took effect.
| Measure | Figure | Source |
|---|---|---|
| Realized tariff rate on covered imports, end of 2025 | 9.4%, highest in decades | Federal Reserve Bank of Dallas, via Fortune |
| Increase in core goods PCE prices through February 2026 attributed to tariffs | 3.1% | Federal Reserve Board note |
| Increase in overall core PCE inflation through February 2026 attributed to tariffs | 0.8 percentage points | Federal Reserve Board note |
| Time to reach full dollar-for-dollar pass-through to retail prices | 5 to 9 months | Federal Reserve Board note; Dallas Fed cites roughly seven months |
A Federal Reserve Bank of Dallas study reported by Fortune in May 2026 found a full pass-through of tariff costs to retail prices, based on realized duty rates actually collected on imports rather than announced tariff rates. Those realized rates reached 9.4% of the value of covered imports by the end of 2025, the highest level in decades. The Dallas Fed research also cited separate Federal Reserve findings that when a retailer's acquisition cost for a good rises by a dollar because of a tariff, the retailer typically charges a dollar more for that good about seven months later, in order to protect profit margins.
What does government research say about who bears the cost?
A Federal Reserve Board note published in April 2026 used a distributed-lag model comparing monthly personal consumption expenditure price changes against tariff exposure by product and country of origin. It found core goods prices rose 3.1% and overall core PCE inflation rose 0.8 percentage points through February 2026 as a result of tariffs implemented between February and November 2025, with full dollar-for-dollar pass-through reached within five to nine months. The authors concluded that tariffs accounted for the entirety of the excess inflation in the core goods category compared with pre-pandemic inflation trends, and noted the pass-through has moved more slowly than during the 2018-19 tariffs on Chinese goods.
Are there exceptions for smaller shipments?
Yes. CBP allows duty and tax exemptions for qualifying low-value e-commerce shipments valued at $800 or less in fair retail value under the Section 321 de minimis provision, meaning not every imported package generates a tariff bill at all. Shared compliance responsibility otherwise rests with both CBP and the importing business, according to CBP's guidance for the trade community.
What does this mean going forward?
Because realized duty rates and consumer pass-through are now tracked in near-real time by Federal Reserve researchers, month-to-month inflation data is likely to keep reflecting tariff changes with a lag of several months rather than immediately. Businesses weighing whether to absorb a new tariff or pass it on face the same three-way choice described above, and government data suggests most have chosen, or been forced by competitive pressure, to pass the bulk of the cost to consumers rather than to foreign suppliers.
That lag also means the inflation effects of a tariff imposed today are unlikely to fully appear in headline price data until well into next year, complicating comparisons between tariff announcements and the monthly inflation reports that follow them. Federal Reserve researchers have said their real-time tracking approach, which follows realized duty collections rather than announced rates, is designed to remain usable as tariff policy continues to change.
