Trade & Sourcing
Mexico’s 2025 Manufacturing Import Value Was Flat. Its Tracked Duty Bill Rose Twelvefold.
Across the same 57 tracked families, imports changed from $99.58 billion to $99.48 billion in 2024–2025, down 0.10%. Reported calculated duties rose from $399.24 million to $4.84 billion, reaching 12.13 times the prior-year level; the observed rate rose from 0.40% to 4.87%.
Editorial evidence cutoff: September 9, 2026. Published September 29, 2026. Observation periods are stated throughout; older figures are retrospective evidence.
Mexico’s tracked manufacturing imports were almost unchanged between 2024 and 2025, yet their calculated-duty bill reached more than twelve times its earlier level. For a September 2026 sourcing review, that completed-year comparison challenges a familiar shortcut: treating a stable cross-border buying total as evidence of a stable duty burden.
Across the same 57 manufacturing product families, customs value moved from $99.58 billion to $99.48 billion, a decline of 0.10%. Calculated duties rose from $399.24 million to $4.84 billion. The observed duty rate increased from 0.40% to 4.87%.
These are historical annual observations available at the September 9 editorial cutoff. They are not a new September release, a determination of USMCA eligibility or a rate quotation for a shipment. Their value is in exposing how differently trade value and recorded duty can move within the same sourcing relationship.
THE BORDER TOTAL BARELY MOVED
The customs-value difference is approximately $96.22 million against a base close to $100 billion. At the scale of this 57-family panel, that is nearly flat. It does not mean every family was flat, and it does not establish that the number of physical units crossing the border was unchanged.
Customs values are nominal dollars. Prices, quantities and the composition of imported goods can move in offsetting directions. A stable aggregate can therefore sit above expanding and contracting product categories, or above changes in specifications that alter the value of each shipment.
The panel deliberately holds its family membership fixed. Mexico’s country records are summed over the same categories in both years, using complete 2024 and 2025 source boards from USITC DataWeb. Changes in what this analysis chose to include are not responsible for the difference in duties.
THE DUTY TOTAL DID NOT FOLLOW THE SAME PATH
The reported duty increase is approximately $4.44 billion. The 2025 amount is 12.13 times the 2024 level. Stating the multiple that way matters: an amount reaching twelve times its baseline is not the same calculation as an increase of twelve times on top of the baseline.
Dividing the duty dollars by the corresponding covered customs values gives an observed rate of about 0.40% in 2024 and 4.87% in 2025. That rise is much larger than the movement in import value. A merchandise-spending chart alone would omit the relationship that drives the story.
The rate is computed from total dollars, rather than by averaging the 57 family rates. Otherwise, a small imported family would influence the country result as much as a much larger one. The actual customs-value weights are essential to reconstructing the recorded duty bill.
A COUNTRY AVERAGE IS NOT AN ENTRY DETERMINATION
Mexico’s observed rate combines goods with different classifications, origins, preferences and other entry characteristics. The aggregate cannot say which individual shipments qualified for a particular program or which provision determined their treatment.
It therefore cannot establish that every Mexican-origin product incurred 4.87%, or that any particular product lost eligibility. Those claims would require evidence that the country summary does not contain. The relevant statistical result is that the duty amounts reported across this matched basket rose sharply relative to customs value.
The Census trade definitions also distinguish calculated duties from a verified cash-payment ledger. The analysis keeps that distinction throughout. A larger calculated-duty total is important recorded evidence, but it should not be renamed a precise measure of final cash paid without the additional records needed to support that statement.
NEARSHORING AND DUTY EXPOSURE ARE SEPARATE QUESTIONS
A sourcing presentation can discuss distance, lead times, border access and country duty averages as though they were one integrated advantage. The historical Mexico comparison shows why those dimensions need separate evidence. A nearly unchanged customs-value relationship did not produce a nearly unchanged duty ratio.
This does not establish that sourcing from Mexico became less attractive overall. Supplier prices, production capabilities, transport, quality, working capital and the treatment of an actual entry all affect the decision. None can be recovered by multiplying a national family aggregate into a company’s budget.
The useful implication is procedural but specific. A September review should identify the merchandise-value assumption and the duty-treatment assumption separately. If an older business case depended on a very low historical duty ratio, its continued relevance needs verification at the item level rather than reassurance from a stable aggregate trade total.
WHAT WOULD EXPLAIN THE CHANGE MORE PRECISELY
The next layer of analysis would decompose the country total by matched product family, then examine changes in rates and customs values within those families. That distinguishes which categories contributed to the additional duty dollars and whether their imported value expanded or contracted.
Even that would leave variation inside each family. Product classifications, eligibility claims and the mix of entries would still matter. A convincing causal account would need transaction-level or appropriately matched detailed evidence and an explicit comparison design, not simply the observation that duties rose during a year of policy changes.
The existing annual comparison supports an important first finding without pretending to answer those later questions. The growth in the recorded duty bill is not a by-product of a similarly large increase in the panel’s import customs value. The near-flat denominator makes that distinction unusually clear.
USE THE HISTORY TO TEST THE SEPTEMBER BUSINESS CASE
For a manufacturer evaluating a September 2026 purchase, the 2024 and 2025 records are a test of assumptions, not a substitute for current verification. A quote based on a remembered country-wide duty advantage needs the specific product, origin, valuation and eligibility facts brought forward to the decision date.
A useful review would also distinguish historical exposure from the proposed order. The company’s own mix may look very different from the 57-family basket. Its verified treatment may differ substantially from the national observed average in either direction. That is a reason to investigate its actual records, not a reason to ignore the national pattern.
The retrospective evidence leaves a clear warning against conflating two stable relationships. Manufacturing goods continued to cross from Mexico at almost the same aggregate customs value in this panel. The calculated-duty burden attached to those goods changed dramatically. A sourcing analysis that carries only the first fact into September leaves out the one most likely to challenge an old cost assumption.
Evidence window: calendar 2024 and 2025; 57 matched families with complete country boards. The historical result is relevant to September 2026 decision checks, without claiming current shipment liability or a fresh September change.
Sources and evidence
Evidence period: 2024 to 2025, 57 tracked families. The frozen evidence record lists the source files and verified hashes available September 9, 2026. Source revision: 5e4fb7726c3d40060c0151c086c903baae856cab. Later live-data updates do not alter the historical evidence in this article.
census.gov/foreign-trade/guide/sec2.html
Published 2026-09-29.