Translating Numbers – Converting a “Compound Duty Rate” to an Equivalent “Ad Valorem” Duty Rate

Every type of imported product has a tariff classification number to identify it and a corresponding numerical figure that represents its duty rate.

The duty rate for most products is represented as a percentage value such as 19.7%.  When it is a percentage, a duty rate is referred to as an “Ad Valorem” rate of duty.

The concept of a duty rate is relatively simple except for when a product has a “compound rate” of duty, such as a watch.  Under the tariff, an example of a watch’s rate of duty is broken out into multiple components, four (4) in fact, in the following example (HTSUS* 9102.11.10):

Movement – 0.44¢ (cents)

Band/strap or bracelet – 14.0%

Case – 6.0%

Battery – 5.3%

On certain occasions however, there is a need to convert a compound rate of duty to a percentage, or Ad Valorem one, such as in the case of dinnerware sets classifiable under HTSUS Heading 8215.

As described by US Customs**, to convert a compound rate to an equivalent Ad Valorem rate, one.

(i)                  obtains the unit value of each article,

(ii)                applies the article’s listed compound rate of duty, and

(iii)               calculates the “equivalent Ad Valorem rate” by computing the percentage of the article’s value that the compound rate of duty amounts to. 

For example, suppose that a set classified in subheading 8215.20.0000, includes a knife that is separately classifiable in subheading 8211.91.5000.  The applicable rate of duty for the knife is “0.7¢ + 3.7%,” a compound duty rate.

Suppose that there are four knives included in the set and their total value is 32¢.  To obtain the unit value of a knife (i.e., the value of one knife), we divide 32¢ by 4 which equals 8¢.

Now, we apply the knife’s listed compound duty rate.  Plugging 8¢ into the duty rate, we get 0.7¢ + 3.7%(8¢).  This equals .996¢ per knife, which amounts to 12.45% of the knife’s value (i.e., .996 is 12.45% of 8¢). 

Therefore, 12.45% is the knife’s equivalent Ad Valorem rate. 

Sounds simple?  I didn’t say it would be, though it doesn’t have to be complicated either.  Give it a try!

Questions/comments?  Post below or email me at clark.deanna@gmail.com

* HTSUS stands for the "Harmonized Tariff Schedule of the United States" which can be found at the US International Trade Commission's website at www.usitc.gov

**Reference is made to HQ967248 (12/22/04)