9903.17.21—Other
Overlay rate
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Stacks on top of the base HTSUS rate of the product
Tandom · Duty calculator
See this overlay in a real duty stack
Pick a covered 10-digit code below, plug in country and invoice value, and Tandom will compute the full landed cost with this overlay stacked on the base rate.
Plain-English explanation
HTS 9903.17.21 is a Chapter 99 tariff modification under Other. When a base 10-digit code falls within this provision's scope, it modifies the duty rate at entry on top of the underlying base duty. Country scope is not on file in Tandom's catalog.
Rate stack at entry
Description
Authoritative scope text from the U.S. Harmonized Tariff Schedule
Eligible to be imported under the first quota period specified in a notice issued by the United States Trade Representative in any 12 month period commencing on October 1 in any year
How to use this provision
When and how this overlay shows up at entry
Chapter 99 provision 9903.17.21 is a tariff modification — it doesn't classify a product on its own. When a base 10-digit HTS code falls within this provision's scope and a shipment matches the country and date conditions, the broker declares the base code at entry, then references 9903.17.21 on a separate line so its rate stacks on top.
Target countries
Applies only to imports from these countries
No country scope on file.
Related Chapter 99 codes(24)
Other Other provisions in Tandom's catalog
9903.04.05In original loaves (provided for in subheading 0406.40.44, 0406.40.54, or 0406.40.70)Suspended9903.04.10Other (provided for in subheading 0406.20.15, 0406.20.24, 0406.20.28, 0406.30.05, 0406.30.14, 0406.30.18, 0406.40.48, 0406.40.58, or 0406.40.70)Suspended9903.04.15Edam and Gouda cheeses (provided for in subheading 0406.20.44, 0406.20.48, 0406.30.44, 0406.30.48, 0406.90.16 or 0406.90.18)Suspended9903.04.20Cheeses and substitutes for cheeses, valued over 11.3¢ per kg, containing, or processed from, Italian-type cheeses, made from cow's milk, not in original loaves (Romano made from cow's milk, Reggiano, Parmesan, Provolone, Provoletti, Sbrinz and Goya) (provided for in subheading 0406.20.77, 0406.20.79, 0406.30.77, 0406.30.79, 0406.90.66 or 0406.90.68)SuspendedFrequently asked questions
What is HTS 9903.17.21?
HTS 9903.17.21 is a Chapter 99 tariff modification under Other. It is not a product classification — it's an overlay code that stacks on top of a base 10-digit HTS code at entry. Scope text: Eligible to be imported under the first quota period specified in a notice issued by the United States Trade Representative in any 12 month period commencing on October 1 in any year
What rate does HTS 9903.17.21 apply?
see the rate card stacks on top of the base HTSUS rate of the covered 10-digit code. Use the Tandom calculator to compute the full landed cost.
Which countries does HTS 9903.17.21 apply to?
9903.17.21 does not have a country scope on file in Tandom's catalog. See the source citation for the authoritative country list.
Is HTS 9903.17.21 currently active?
Yes — 9903.17.21 is currently active with no expiration on file.
Learn more
Tandom guides relevant to this code
How Chapter 99 tariff layers stack on a single entry
How to read, order, and report Chapter 99 HTS codes alongside the base classification on a US entry summary in 2026. The full stacking ladder for brokers and compliance teams.
Open resource
How to calculate US import duties
A working guide to the inputs, the layers, and the math behind a US entry summary in 2026. Written for brokers, forwarders, and importer compliance teams.
Open resource