What is an effective tariff rate?

The effective tariff rate is the actual duty collected divided by the dutiable value of imports. It reflects the real-world average duty burden on goods entering the U.S., accounting for trade agreements, exemptions, and preferential programs.

How are U.S. import duties calculated?

U.S. import duties are calculated based on the Harmonized Tariff Schedule (HTS) rate for each product, applied to the dutiable value (typically the transaction value). Rates vary by country of origin due to trade agreements like USMCA, GSP preferences, and Section 301/232 tariffs.

What is the difference between effective and statutory tariff rates?

Statutory rates are the official rates published in the Harmonized Tariff Schedule. Effective rates reflect what is actually collected after accounting for duty-free imports, preferential trade programs, and mixed rate types. Effective rates are typically lower than statutory rates.

U.S. Tariff & Duty Rate Lookup — Find Import Duty Rates

Understanding U.S. Tariff Rates

The effective tariff rate shown here is calculated from Census Bureau data as total duties collected divided by total dutiable import value. This reflects the actual average duty burden, which can differ significantly from published statutory rates.

Products may enter at lower rates through trade agreements (USMCA, KORUS), preferential programs (GSP, AGOA), or duty drawback provisions. Some imports are entirely duty-free. The effective rate captures all of these factors.

Section 301 and Section 232 Tariffs

Additional tariffs under Section 301 (targeting China) and Section 232 (steel and aluminum) have significantly increased effective duty rates on many products since 2018. These are reflected in the effective rates shown here.

Product	Duty Collected	Import Value	Effective Rate
PASS VEH SPK-IG INT COM RCPR P ENG >1500 NOV 3M CC 870323	$925M	$6.0B	17.9%
PASS VEH W/SPK-IG AND ELEC MOTOR,NOT CHRGD BY PLUG 870340	$481M	$3.0B	17.3%
ALUMINUM ALLOY RECT PLATES ETC, OVER .2 MM THICK 760612	$328M	$627M	56.3%
LITHIUM ION BATTERIES 850760	$308M	$1.6B	21.2%
UNWROUGHT ALUMINUM, NOT ALLOYED 760110	$253M	$534M	47.8%
PASS VEH SPK-IG INT COM RCPR P ENG > 3000 CC 870324	$242M	$1.9B	14.3%
MTR VEH TRANS GDS SPK IG IN C P ENG, GVW NOV 5 MTN 870431	$229M	$2.5B	24.0%
PASS MTR VEH,SPARK IGN ENG, >1000CC BUT =<1500CC 870322	$198M	$2.0B	18.8%
ELEC CONDUCTORS, LT=1000 V, W/ CONNECTORS, NESOI 854442	$192M	$733M	30.8%
STATIC CONVERTERS; ADP POWER SUPPLIES 850440	$184M	$1.8B	12.9%
ARTICLES OF IRON OR STEEL NESOI 732690	$181M	$385M	49.8%
PARTS, NESOI, OF AIR CONDITIONING MACHINES 841590	$172M	$832M	25.0%
PARTS AND ACCESSORIES OF MOTOR VEHICLES, NESOI 870899	$148M	$1.3B	20.5%
NEW PNEUMATIC TIRES OF RUBBER, FOR MOTOR CARS 401110	$138M	$813M	24.1%
UNWROUGHT ALUMINUM ALLOYS 760120	$135M	$288M	50.0%
CONTROLS ETC W ELECT APPR F ELECT CONT NOV 1000 V 853710	$123M	$1.9B	14.3%
STRUCTURES AND PARTS NESOI OF IRON OR STEEL 730890	$122M	$342M	40.3%
MTR VEH TRANS GDS COM-IG INT C P E GVW >5NOV20 MTN 870422	$121M	$753M	25.4%
MOTOR VEHICLES WITH ONLY ELECTRIC MOTOR, NESOI 870380	$118M	$779M	17.2%
NEW PNEUMATIC TIRES OF RUBBER, FOR BUSES OR TRUCKS 401120	$114M	$538M	27.2%
TAPS COCKS ETC F PIPE VAT INC THERMO CONTROL NESOI 848180	$112M	$942M	15.1%
MECH SHOVELS EXCAVATORS ETC W 360 DEGREE SPRSTRUC 842952	$109M	$468M	23.7%
THREADED SCREWS AND BOLTS NESOI OF IRON OR STEEL 731815	$108M	$212M	54.3%
PTS & ACCESS OF BODIES OF MOTOR VEHICLES, NESOI 870829	$103M	$1.6B	17.4%
ARTICLES OF PLASTICS, NESOI 392690	$101M	$887M	16.2%

Product	Duty Collected	Import Value	Effective Rate
PASS VEH SPK-IG INT COM RCPR P ENG >1500 NOV 3M CC 870323	$925M	$6.0B	17.9%
PASS VEH W/SPK-IG AND ELEC MOTOR,NOT CHRGD BY PLUG 870340	$481M	$3.0B	17.3%
ALUMINUM ALLOY RECT PLATES ETC, OVER .2 MM THICK 760612	$328M	$627M	56.3%
LITHIUM ION BATTERIES 850760	$308M	$1.6B	21.2%
UNWROUGHT ALUMINUM, NOT ALLOYED 760110	$253M	$534M	47.8%
PASS VEH SPK-IG INT COM RCPR P ENG > 3000 CC 870324	$242M	$1.9B	14.3%
MTR VEH TRANS GDS SPK IG IN C P ENG, GVW NOV 5 MTN 870431	$229M	$2.5B	24.0%
PASS MTR VEH,SPARK IGN ENG, >1000CC BUT =<1500CC 870322	$198M	$2.0B	18.8%
ELEC CONDUCTORS, LT=1000 V, W/ CONNECTORS, NESOI 854442	$192M	$733M	30.8%
STATIC CONVERTERS; ADP POWER SUPPLIES 850440	$184M	$1.8B	12.9%
ARTICLES OF IRON OR STEEL NESOI 732690	$181M	$385M	49.8%
PARTS, NESOI, OF AIR CONDITIONING MACHINES 841590	$172M	$832M	25.0%
PARTS AND ACCESSORIES OF MOTOR VEHICLES, NESOI 870899	$148M	$1.3B	20.5%
NEW PNEUMATIC TIRES OF RUBBER, FOR MOTOR CARS 401110	$138M	$813M	24.1%
UNWROUGHT ALUMINUM ALLOYS 760120	$135M	$288M	50.0%
CONTROLS ETC W ELECT APPR F ELECT CONT NOV 1000 V 853710	$123M	$1.9B	14.3%
STRUCTURES AND PARTS NESOI OF IRON OR STEEL 730890	$122M	$342M	40.3%
MTR VEH TRANS GDS COM-IG INT C P E GVW >5NOV20 MTN 870422	$121M	$753M	25.4%
MOTOR VEHICLES WITH ONLY ELECTRIC MOTOR, NESOI 870380	$118M	$779M	17.2%
NEW PNEUMATIC TIRES OF RUBBER, FOR BUSES OR TRUCKS 401120	$114M	$538M	27.2%
TAPS COCKS ETC F PIPE VAT INC THERMO CONTROL NESOI 848180	$112M	$942M	15.1%
MECH SHOVELS EXCAVATORS ETC W 360 DEGREE SPRSTRUC 842952	$109M	$468M	23.7%
THREADED SCREWS AND BOLTS NESOI OF IRON OR STEEL 731815	$108M	$212M	54.3%
PTS & ACCESS OF BODIES OF MOTOR VEHICLES, NESOI 870829	$103M	$1.6B	17.4%
ARTICLES OF PLASTICS, NESOI 392690	$101M	$887M	16.2%

U.S. Tariff & Duty Rate Lookup

Understanding U.S. Tariff Rates

Section 301 and Section 232 Tariffs

Related Tools & Data

U.S. Tariff & Duty Rate Lookup

Understanding U.S. Tariff Rates

Section 301 and Section 232 Tariffs

Related Tools & Data