Duty rates verified against the HTSUS · MPF at FY2026 · the duty stack · single-item calculator · HTS finder
The single-line landed-cost calculator is for one part. This one takes a whole bill of materials — upload your BOM and it pulls out the power and cable lines automatically, or add them by hand — and returns the duty and fees on each, ranked by exposure, plus the number that matters for a sourcing decision — how much is recoverable by moving origin. Same verified rates as the duty stack. Everything runs in your browser; the BOM is never uploaded.
Your BOM
Drop a BOM — Excel or CSV — here, or — we pull out the power & connectivity lines and skip the rest.
Read in your browser · nothing is uploaded · .xlsx and .csv supported.
| Category | Origin | Qty | FOB / unit | |
|---|---|---|---|---|
Paste from a spreadsheet
One line per row: HTS or keyword, qty, FOB, origin — e.g. 8504.40.85, 10000, 6.20, china or usb-c, 8000, 1.85, china. Origin defaults to China.
Covers Kestner's power & connectivity codes. Goods + duties + the entry MPF; add freight and broker in the per-item calculator.
BOM goods value
$91,200
Duties + MPF
$34,391
37.7% blended
Recoverable · move to Vietnam
$21,750
or $34,075 to Mexico (USMCA, duty-free)
| Line | Origin | Goods | Duties | Eff. | → VN saves |
|---|---|---|---|---|---|
| Power adapters & chargers | China | $62,000 | $23,250 | 37.5% | $15,500 |
| USB-C, HDMI, AV & Ethernet cables | China | $14,800 | $5,935 | 40.1% | $3,700 |
| Coaxial cable | China | $10,200 | $4,366 | 42.8% | $2,550 |
| Optical fiber | Vietnam | $4,200 | $525 | 12.5% | — |
Estimate only — not customs, tariff, or legal advice. Duties are modeled on the FOB value as the entered value; HTS categories are Kestner's common codes, so confirm the classification of your parts with a licensed broker before you file. Verify current rates against the duty stack.
How the exposure is built
Each line's duties are ad valorem on its entered value and they add: MFN base + the 25% Section 301 (China only) + the 12.5% forced-labor Section 301 (China and Vietnam; USMCA-Mexico exempt). The Merchandise Processing Fee is not per line — it is charged once per entry at 0.3464% of the non-USMCA entered value, bounded $33.58–$651.50 (FY2026) — so it sits in the summary, not the rows. Recoverable is the duty a line would shed by moving origin: to Vietnam it drops the 25% China List-3 layer; to a USMCA-qualifying Mexico origin it drops the duty entirely.
The duty rates behind it
Effective rate by category and origin — the numbers this tool applies, current as of the verification date above.
| Category · HTS | MFN base | China | Vietnam | Mexico |
|---|---|---|---|---|
Power adapters & chargers 8504.40.85 | Free | 37.5% | 12.5% | 0.0% |
USB-C, HDMI, AV & Ethernet cables 8544.42.90 | 2.6% | 40.1% | 15.1% | 0.0% |
Bulk Ethernet cable (unterminated) 8544.49.30 | 5.3% | 42.8% | 17.8% | 0.0% |
Coaxial cable 8544.20.00 | 5.3% | 42.8% | 17.8% | 0.0% |
Optical fiber 8544.70.00 | Free | 37.5% | 12.5% | 0.0% |
USB-C hubs & docks 8471.80.00 | Free | 37.5% | 12.5% | 0.0% |
Frequently asked
How do I calculate the tariff exposure on a bill of materials?
Line by line: each line's duty is its HTS code's effective rate times the line's entered value — MFN base, plus the 25% Section 301 on Chinese-origin lines, plus the 12.5% Section 301 forced-labor duty on China and Vietnam origin (USMCA-Mexico exempt). The Merchandise Processing Fee is charged once per entry, not per line. This analyzer classifies the power and connectivity lines automatically, computes the duty on each, and ranks them by exposure.
How much duty can re-sourcing from China to Vietnam recover?
Moving a line's genuine origin from China to Vietnam removes the 25% Section 301 List 3 layer, which applies to Chinese origin only — about $25,000 per $100,000 of goods value. The analyzer shows the recoverable dollar figure per line and in total, for both Vietnam and USMCA-Mexico re-sourcing. The savings only clear if the new origin reflects genuine substantial transformation.
Is my BOM uploaded when I use the analyzer?
No. The file is parsed entirely in your browser — nothing is uploaded or stored. That is why the tool works with a confidential BOM: the data never leaves your machine.
Sources
- Duty rates (MFN, §301 25% + 12.5%) — verifiedthe duty stack
- USTR Section 301 / CBP9903.88.03 · 84 FR 20459
- White House Presidential Action / USTR §301 forced-laborPresidential Action 2026-07-23 · USTR Docket 2026-0265/0266 · HTSUS 9903.05.xx · eff. 2026-07-24
- CBP customs user fees (COBRA)19 CFR 24.23 · FY2026 adjustment
The recoverable number only holds if the origin holds.
Moving a line to Vietnam sheds the 25% China layer — but only if the origin is genuine substantial transformation, not a Chinese part finished offshore. Kestner builds power and connectivity hardware in its own plants in both origins and documents the country of origin per unit, so the savings you plan against are the savings that clear.