America's $107 Billion Energy Import Month: Inside HS Chapter 27, August 2026

Last updated October 22, 2026·Data: US Census Bureau International Trade API, imports HS10, month 2026-08

Where Chapter 27 sits in the import bill

Energy is the largest single HS chapter by import value in the month — ahead of pharmaceuticals (Chapter 30, $64.8B) and precious metals including gold (Chapter 71, $36.9B). That ordering matters for planning: tariff and trade-remedy exposure on fuels moves the total import bill more than almost any other chapter, and port-level energy flows dominate the tonnage side even where value ranks lower. When duty or sanction regimes touch Chapter 27, the fiscal surface area is enormous precisely because the underlying volumes are strategic rather than discretionary.

The ten biggest energy import lines

Source: https://api.census.gov/data/timeseries/intltrade/imports/hs (fetched 2026-10-22).

Values are Census "general value" summed over partner countries; the top-partner share divides the largest single partner's value by the line total.

Crude oil's dominance is structural: domestic refining runs on grades matched to refinery configuration, and no plausible domestic substitution exists for heavy Gulf-Coast cracking capacity. What is less obvious is the second tier — middle distillate and gasoline-blend imports together rival crude's margin, reflecting regional product imbalances rather than raw resource endowment. Electrical energy (271600) is the curiosity: only 6 partner jurisdictions physically interconnect with the US grid, making it the chapter's purest bilateral-dependence story.

Crude versus refined products: two trade patterns

The chapter splits into two structurally different businesses. Crude petroleum (270900) is a bulk-grades trade: refiners buy specific gravity and sulfur profiles, cargoes are large, and the supplier list reads like a map of OPEC-plus plus Canada's oil sands. Refined-product lines (271019 middle distillates, 271012 gasoline blends) behave differently — they smooth regional imbalances, move in smaller parcels, and swing with seasonal demand and refinery maintenance cycles. Natural gas shows up twice, as pipeline gas (271121) and LNG (271111), with the liquefied chain adding cargo-level flexibility that pipelines cannot offer. Electrical imports (271600) barely resemble the rest: power flows are bounded by physical interconnections, so the "market" is a handful of neighboring grid operators. Procurement teams should treat these as four separate risk profiles rather than one commodity called energy, because disruption modes — OPEC decisions, refinery outages, winter gas spikes, grid emergencies — do not correlate.

Concentration: diversified on paper, lumpy in practice

Across all 41 Chapter 27 lines, the single largest partner supplies just 14% of chapter value, and even the most concentrated individual line — 270111, bituminous coal — drew only 25% of its August value from its biggest partner. Of the 41 reported HS6 codes, 36 recorded nonzero value in the month, and not one of those depended on a single supplier for more than half its value. That diversity is structural rather than accidental: crude grades, refined-product balances and pipeline gas contracts each clear through dozens of counterparties, and no physical chokepoint mirrors the OPEC-era scarcity narrative in the current data.

Diversified supply does not mean uniform exposure, though. The concentration metric behaves very differently across the chapter's sub-businesses: crude ($77.7B from 47 suppliers, top-partner share near 13%) sits close to the chapter norm, while physically constrained flows such as grid electricity cannot diversify beyond their interconnections at all. The practical screening rule is therefore asymmetric: treat liquid-fuel lanes as price-risk problems and constrained lanes as availability-risk problems — they fail in different ways and need different hedges. When a future month does show a line crossing the fifty-percent mark, that single flag will say more than any chapter-level average.

Using the slice in daily work

1. Find your code. Locate the exact HS6/H TS position in the HS browse before quoting lead times; energy-adjacent goods straddle chapters more than buyers expect.
2. Price the duty stack. Fuels often mix MFN rates with additional measures; model the all-in rate in the duty calculator rather than assuming energy is duty-free by reflex.
3. Check remedy overlap. Anti-dumping and countervailing orders periodically touch petrochemical downstreams; the free trade-remedy lookup flags them per code.

Reading partner counts correctly

Census "partner countries" is a customs-agent count, not a consumer-market count: every distinct country code that reported shipping the line during the month adds one, so a fuel cargo transferred through a regional hub can legitimately appear under more than one trade relationship across the chapter. Three practical consequences follow. First, partner counts overstate commercial diversification for intermediated flows — a line showing 30 partners may still be physically dominated by two origin refineries. Second, the value column is general value at the US border, freight and insurance excluded, which flatters high-priced refined products less than volumetric measures would. Third, monthly slices are seasonally noisy: refinery maintenance windows and winter heating demand move single months by double-digit percentages without any trend change, which is why this page deliberately reports levels for 2026-08 rather than growth rates off one observation.

Methodology and data freshness

This analysis uses the canonical local mirror of the Census International Trade API monthly imports slice for 2026-08 (3,680 HS6 records; each record keeps its upstream query URL and fetch timestamp; license: US public domain with attribution). Every figure on this page — chapter totals, rankings, partner counts, concentration ratios — is recomputed from that artifact at generation time, never hand-entered. Month-over-month comparisons are intentionally omitted: a single monthly slice supports level statements, not trend claims, and we would rather publish fewer conclusions than unfounded ones. For enforcement-side exposure of energy-adjacent supply chains, read our companion analysis of the WRO & Findings register. Nothing here constitutes legal or investment advice.