Analysis
HTS 4418.73.10 covers for mosaic floors: solid under heading 4418 (builders' joinery and carpentry of wood, including cellular wood panels and assembled…).
Within this group the rate runs from duty-free to 8%. Compared with 4418.73.30 (other: other), which pays 8%, a misclassification either way moves the duty by 8 percentage points.
The normal trade relations rate here is zero, shared by about 61% of the 257 tariff lines in chapter 44, a useful check when a neighbouring dutiable line is a candidate. Free here means free of the base duty only: origin-specific Chapter 99 duties such as Section 301 can still be owed.
Census statistics map these goods to NAICS 321918 (Other Millwork (including Flooring)), an industry of 1,445 US establishments employing 32,379 people. That concordance is how imports of this line are compared with US output.
Every edition we compared, from Jan 2023 to Oct 2026 (Rev. 22), shows the same general rate of Free.
Neighbouring lines
| Line | Description | General rate |
|---|---|---|
| 4418.73.20 | Having a face ply more than 6 mm in thickness | Free |
| 4418.73.30 | Other: other | 8% |
| 4418.73.40 | Having a face ply more than 6 mm in thickness | 3.2% |
| 4418.73.60 | Of unidirectional bamboo | Free |
| 4418.73.70 | Other: other | 5% |
| 4418.73.90 | Of bamboo or with at least the top layer (wear layer) of bamboo: other | 3.2% |