What tariff does the U.S. charge on transformers and power supplies from China?

In 2025, USITC reported an effective calculated-duty rate of 47.11% for transformers and power supplies imported from China, calculated as reported Calculated Duties divided by covered customs value. It reflects the observed entry mix but does not identify the legal cause of the rate or determine an entry-specific duty.

How much transformers and power supplies does the U.S. import from China?

The U.S. imported $3.0B of transformers and power supplies from China in 2025, 9.6% of the tracked transformers and power supplies it imports, ranking China the 3rd-largest named source. The chart above traces the retained reported years; a year with no retained source row is unknown, not zero.

What does freight add on transformers and power supplies from China?

Cost, insurance, and freight ran 4.37% of customs value on transformers and power supplies from China in 2025. That is an additional import burden alongside the reported effective calculated-duty rate; a country-specific invoice price is still required for a comparable landed unit cost.

Tariff Monitor

U.S. Imports of Transformers and power supplies From China

In 2025, U.S. importers brought in $3.0B of transformers and power supplies from China; USITC reported an effective calculated-duty rate of 47.11% for that flow. That makes China the 3rd-largest named source of this family, at 9.6% of tracked transformers and power supplies imports. The family-wide effective calculated-duty rate is 11.52%, so China's observed rate is 35.6 points more than average. Freight and insurance add 4.37% on top of customs value. Tracked-family figures are a floor on total bilateral trade, from USITC DataWeb data.

The current reading

Import value: $3.0B of transformers and power supplies from China in 2025, customs value.
Observed effective calculated-duty rate: 47.11%, reported Calculated Duties ÷ covered customs value, 35.6 points above the 11.52% family average.
Share of the family: 9.6%, #3 named source of transformers and power supplies.
Reported freight and insurance: 4.37% of customs value, shown alongside the effective calculated-duty rate.
History depth: 6 years of annual named-source boards.

Frequently asked questions

What tariff does the U.S. charge on transformers and power supplies from China? In 2025, USITC reported an effective calculated-duty rate of 47.11% for transformers and power supplies imported from China, calculated as reported Calculated Duties divided by covered customs value. It reflects the observed entry mix but does not identify the legal cause of the rate or determine an entry-specific duty.
How much transformers and power supplies does the U.S. import from China? The U.S. imported $3.0B of transformers and power supplies from China in 2025, 9.6% of the tracked transformers and power supplies it imports, ranking China the 3rd-largest named source. The chart above traces the retained reported years; a year with no retained source row is unknown, not zero.
What does freight add on transformers and power supplies from China? Cost, insurance, and freight ran 4.37% of customs value on transformers and power supplies from China in 2025. That is an additional import burden alongside the reported effective calculated-duty rate; a country-specific invoice price is still required for a comparable landed unit cost.

About this data

Reference statistics derived from USITC published data. Not a customs ruling. MFN-Free and Special-rate fields describe statutory line coverage only; final entry liability requires origin, date, eligibility, exclusions and other transaction facts. Calculated Duties are statistical estimates, not a cash-collections ledger. Confirm classification, origin, program eligibility, and final entry liability with a licensed customs broker.

Last reviewed 2026-08-31.