9903.45.21—Safeguard Exclusion
Overlay rate
No change
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 9903.45.21 is a Chapter 99 tariff modification under Safeguard Exclusion. When a base 10-digit code falls within this provision's scope, it imposes no change on top of the underlying base duty. Country scope is not on file in Tandom's catalog. It expired on 2026-02-07 and is no longer enforced for new entries. It currently covers 4 base HTS codes in Tandom's catalog.
Rate stack at entry
Description
Authoritative scope text from the U.S. Harmonized Tariff Schedule
If entered in an annual aggregate quantity not exceeding 12.5 gigawatts, under the terms of such note
How to use this provision
When and how this overlay shows up at entry
Chapter 99 provision 9903.45.21 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 9903.45.21 on a separate line so its rate stacks on top.
Worked example
How this overlay applies to a real covered code
Imagine an importer files a $10,000.00 shipment of 8541.42.00.10 (crystalline silicon photovoltaic cells of a kind described in statistical note 10 to this chapter) from a country in scope. The overlay rate of No change stacks on top of the base HTSUS rate of Free.
Base duty
$0.00
Free × $10,000.00
This overlay
$0.00
0% × $10,000.00
Total duty
$0.00
Plus AD/CVD if applicable
Opens the Tandom calculator with HTS 8541.42.00.10 and $10,000.00 pre-filled — add a country to compute the full landed cost.
Target countries
Applies only to imports from these countries
No country scope on file.
Affected base HTS codes(4)
Every covered 10-digit code this overlay stacks on.
Related Chapter 99 codes(8)
Other Safeguard Exclusion provisions in Tandom's catalog
9903.45.01If entered in an aggregate quantity, in any quarterly period specified in note 17(i) to this subchapter, not exceeding 300,000 units in any such quarterly period, under the terms of such noteInactive9903.45.02OtherInactive9903.45.05If entered in an annual aggregate quantity not exceeding the quantity specified in note 17(g) to this subchapter, under the terms of such noteInactive9903.45.06OtherInactive9903.45.22OtherFrequently asked questions
What is HTS 9903.45.21?
HTS 9903.45.21 is a Chapter 99 tariff modification under Safeguard Exclusion. 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: If entered in an annual aggregate quantity not exceeding 12.5 gigawatts, under the terms of such note
What rate does HTS 9903.45.21 apply?
The provision states: "No change" That rate stacks on top of whatever the base HTSUS rate is for the underlying 10-digit code. Use the Tandom calculator to compute the full landed cost for any covered product.
Which countries does HTS 9903.45.21 apply to?
9903.45.21 does not have a country scope on file in Tandom's catalog. See the source citation for the authoritative country list.
Is HTS 9903.45.21 currently active?
No — 9903.45.21 expired on 2026-02-07 and is no longer enforced for new entries.
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