HTS heading 8473 · Chapter 84, Machinery, mechanical appliances and computers
US imports of Parts and accessories suitable
Parts and accessories (other than covers, carrying cases and the like) suitable for use solely or principally with machines of headings 8470 to 8472
Source: U.S. Census Bureau, USA Trade Online / International Trade API, imports for consumption, March–July 2026; effective duty = calculated duty ÷ dutiable value.
US imports under HTS 8473 at a glance
Between March and July 2026, US importers entered $66.6 billion of parts and accessories suitable under HTS heading 8473, from 45 of the 55 origin countries covered here and across 14 ten-digit tariff lines — roughly $13.3 billion a month of customs value under a single four-digit heading.
Chapter 84 covers machinery, mechanical appliances and computers; heading 8473 is one of its larger entries by value, which is why the duty treatment below is worth checking line by line.
Top origin countries by share of HTS 8473
Origin countries: value, share and duty paid
| Origin | Import value | Share | Dutiable share | Effective duty | Duty per $100 | Detail |
|---|---|---|---|---|---|---|
| Taiwan | $19.0 billion | 28.6% | 0.9% | 12.28% | $0.11 | Duty on 8473.30.11 |
| Vietnam | $17.4 billion | 26.2% | 0.7% | 23.45% | $0.16 | Duty on 8473.30.11 Vietnam lane |
| South Korea | $12.6 billion | 18.9% | 0.3% | 22.49% | $0.07 | Duty on 8473.30.11 |
| Malaysia | $9.56 billion | 14.4% | 0.4% | 19.90% | $0.09 | Duty on 8473.30.11 |
| Philippines | $2.97 billion | 4.5% | 0.9% | 18.72% | $0.18 | Duty on 8473.30.11 |
| Thailand | $1.80 billion | 2.7% | 0.6% | 20.27% | $0.13 | Duty on 8473.30.11 Thailand lane |
| China | $1.40 billion | 2.1% | 35.4% | 27.15% | $9.60 | Duty on 8473.30.51 China lane |
| Mexico | $1.03 billion | 1.6% | 1.3% | 30.75% | $0.41 | |
| India | $188 million | 0.3% | 8.6% | 14.08% | $1.21 | Duty on 8473.30.11 India lane |
| Canada | $147 million | 0.2% | 5.6% | 67.16% | $3.79 | |
| Indonesia | $110 million | 0.2% | 5.4% | 15.82% | $0.86 | Duty on 8473.30.11 Indonesia lane |
| France | $66.2 million | 0.1% | 3.8% | 13.86% | $0.53 | Duty on 8473.30.11 |
| Germany | $59.9 million | 0.1% | 53.9% | 11.95% | $6.45 | Duty on 8473.40.86 |
| United Kingdom | $58.8 million | 0.1% | 8.7% | 15.60% | $1.36 | Duty on 8473.30.51 |
| Japan | $39.3 million | 0.1% | 50% | 12.23% | $6.11 | Duty on 8473.30.51 |
Who exports parts and accessories suitable to the United States
Taiwan, Vietnam and South Korea together account for 73.6% of the heading. Taiwan leads with $19.0 billion (28.6%), ahead of Vietnam at 26.2% and South Korea at 18.9%. Concentrated but not captive: alternatives exist, and buyers who qualify a second origin early keep some leverage when duties move.
Asian origins supply 97.8% of the heading, led by Taiwan, Vietnam, South Korea and Malaysia. That means ocean transit from Asian base ports and, for most of these countries, no free-trade-agreement relief — so the tariff line you classify into carries the full cost.
What importers actually paid in duty
Most of this heading enters duty-free. Only 1.6% of the entered value was dutiable, and across all origins CBP collected $235 million — about $0.35 of duty per $100 of goods. The headline rate on the dutiable portion was 22.6%, but it applies to a small slice, so the number that matters to a landed-cost model is the $0.35.
The spread between origins is real. Among origins with at least 2% of the heading, China paid the most duty relative to value — $9.60 per $100 — while South Korea paid $0.07. On a $250,000 purchase order that gap is about $24,000 in duty alone, which is worth pricing into a sourcing decision rather than discovering on the entry summary.
10-digit tariff lines under HTS 8473
| HTS code | Description | Import value | Share | Duty per $100 | Largest origin |
|---|---|---|---|---|---|
| 8473.30.11.40 | Memory modules suitable for use solely or principally with machines of heading 8471 | $40.6 billion | 60.9% | $0.13 | Vietnam |
| 8473.30.11.80 | Other | $20.7 billion | 31.1% | $0.24 | Taiwan |
| 8473.30.51.00 | — | $3.18 billion | 4.8% | $2.75 | Taiwan |
| 8473.30.91.00 | — | $1.55 billion | 2.3% | $0.92 | Thailand |
| 8473.30.20.00 | — | $297 million | 0.5% | $1.45 | Taiwan |
| 8473.40.86.00 | — | $99.8 million | 0.1% | $10.47 | Germany |
| 8473.29.00.00 | — | $58.2 million | 0.1% | $12.28 | Taiwan |
| 8473.21.00.00 | — | $37.4 million | 0.1% | $3.87 | Vietnam |
| 8473.50.90.00 | — | $28.7 million | 0% | $14.36 | China |
| 8473.50.30.00 | — | $10.7 million | 0% | $7.65 | Canada |
| 8473.40.10.00 | — | $5.9 million | 0% | $11.64 | India |
| 8473.50.60.00 | — | $3.6 million | 0% | $21.08 | China |
Source: U.S. Census Bureau, USA Trade Online / International Trade API, imports for consumption, March–July 2026; effective duty = calculated duty ÷ dutiable value.
The 10-digit lines under heading 8473
14 ten-digit lines carried trade under this heading in the period. The largest, 8473.30.11.40 (memory modules suitable for use solely or principally with machines of heading 8471), took 60.9% of the heading at $40.6 billion. 8473.30.11.80, 8473.30.51.00 and 8473.30.91.00 follow. Rates diverge between those lines, so the classification your broker files is worth checking against the goods rather than carried over from the last entry.
What the duty stack looks like
The rate on an entry is not one number. It is a stack: the general (column 1) rate for the 10-digit line, less any trade-agreement preference the goods qualify for, plus whatever additional duties apply to that product and origin, all applied to the customs value declared. The $0.35 per $100 above is what that stack averaged across every entry in this heading — a benchmark, not a quote.
For the origins carrying the most volume, the per-country breakdowns go a level deeper: Taiwan (8473.30.11), Vietnam (8473.30.11) and South Korea (8473.30.11). To price a specific shipment, put your 10-digit code and country of origin into the tariff simulator.
What this means for your next shipment
The practical sequence is: confirm the 10-digit line against the actual goods, confirm origin under the substantial-transformation rules rather than the shipping address, then price the duty on that pair. Airlift USA moves the cargo and coordinates classification and entry filing through our licensed broker network, so the code agreed at booking is the one on the entry.
For the operational side rather than the tariff side, see the Heavy Machinery & Industrial Equipment guide for how this cargo moves, the Vietnam to USA lane for transit times and ports and the heading index to compare against the rest of chapter 84.
Price a shipment under HTS 8473
Airlift USA has moved ocean and air freight into the United States since 1999 and coordinates HTS classification, ISF and entry filing through our licensed broker network.
Methodology
Figures come from the U.S. Census Bureau's international trade statistics for imports for consumption — the customs value of goods entered into US commerce, not shipments in transit or goods held in bonded warehouses. The period is March–July 2026 (5 months of data), and coverage is limited to 55 major origin countries, so totals here are lower than published US-wide totals for the same heading.
Three quantities are additive and everything else is derived from them: entered customs value, dutiable value and calculated duty. Effective duty is calculated duty divided by dutiable value — the rate CBP actually applied to the part of the trade that was dutiable. Dutiable share is dutiable value divided by entered value; below 20% it means the trade entered mostly free, under a trade agreement or a duty-free provision. Duty per $100 spreads calculated duty across all entered value, which is the figure comparable between origins.
Chapter 98 and chapter 99 are excluded: those are special classification and temporary-measure provisions rather than product headings. Heading and tariff-line descriptions are the current HTS text. Values are historical and reflect duty as calculated at the time of entry; they are not a quote and not a prediction of the rate on a future shipment.
Source: U.S. Census Bureau, USA Trade Online / International Trade API, imports for consumption, March–July 2026; effective duty = calculated duty ÷ dutiable value. Census data is a work of the US government and is in the public domain.
Frequently asked questions
Which countries export the most parts and accessories suitable to the United States?
Taiwan is the largest origin under HTS heading 8473, with $19.0 billion entered between March and July 2026, or 28.6% of the heading. Vietnam follows at 26.2% and South Korea at 18.9%. Figures cover the 55 major origin countries in this dataset. Source: U.S. Census Bureau, USA Trade Online / International Trade API, imports for consumption, March–July 2026; effective duty = calculated duty ÷ dutiable value.
How much import duty is paid on parts and accessories suitable under HTS 8473?
Across all origins, 1.6% of the entered value was dutiable and CBP calculated $235 million of duty over the five months — an effective 22.6% on dutiable value, or about $0.35 per $100 of goods across the whole heading. Your own rate depends on the exact 10-digit line and country of origin.
Which HTS codes fall under heading 8473?
Heading 8473 covers parts and accessories (other than covers, carrying cases and the like) suitable for use solely or principally with machines of headings 8470 to 8472. 14 ten-digit lines recorded imports in this period; the largest by value were 8473.30.11.40, 8473.30.11.80, 8473.30.51.00 and 8473.30.91.00. Duty rates differ between those lines, so the 10-digit classification matters more than the heading.
Which origin pays the lowest duty on parts and accessories suitable?
Among origins with at least 2% of the heading, South Korea paid the least duty relative to entered value — about $0.07 per $100 of goods, with 99.7% of its value entering free. Duty is only one part of landed cost, and a claim has to be substantiated at entry to be allowed.
How do I check the duty on my own shipment?
Use the Airlift USA tariff simulator with your 10-digit HTS code and country of origin to see the duty stack that applies today, then confirm the classification before you file. Airlift USA coordinates classification and entry filing through our licensed broker network and can review the code against your product specification.