I finally located a duty-calculator web page. According to that page, the duty on printed circuit boards imported from China to Mexico should be zero, but VAT will be added. Instead of 668 Pesos, I should have only had to pay the VAT of 6%, 109 Pesos. The exchange rate is around 20 Pesos to the USD.
The problem may be the harmonizing code (HS Code) shown on the invoice. HS Code 85-34-00-90-00, according to China is "PCB, 4 layer or less". Mexico does not seem to recognize that code, but HS Code 85-37-10-99-0 is "printed circuit board" in Mexico, which I used in the calculator.
It may be too late to do anything about it this time, or not worth the effort, but duties and taxes of over 50% of the value of the goods would sure put a damper on doing other projects while I'm here!
One interesting point I found. Mouser has operations in Mexico, and stuff ordered from the Mexican site shows the prices including duty...which are the same as the US prices for enclosures and a few other things I've looked at.
From the duty calculator page:
CUSTOMS DUTY CALCULATOR
CUSTOMSDUTYFREE.COM
One stop shop for customs duty for 100+ countries
The Customs duty calculation for printed circuit boards is as follows:
Country Details :
- From Country : China
- To Country : Mexico
Product details :
- Product description : printed circuit boards
- Hs code : 85-37-10-99-0
Extra taxes details :
- DTA IS : 134.4
- Excise duty is applicable on alcohol and tobacco
Calculation details :
- Item cost : 1200
- Shipment cost : 480
- Insurance cost : 0
- CIF value (item cost + shipment cost + insurance cost) : 1680
- Customs duty rate : 0%
- CUSTOMS DUTY (customs duty rate * (CIF)) : 0
- Vat rate : 6%
- VAT (vat rate * (Customs duty+CIF+other taxes if applicable)) : 108.864
- Total amount to be paid : 1923.264(excluding extra taxes if applicable)
The above duty has been calculated from '
https://customsdutyfree.com' on 2020-12-19.
Note: All the rates and values are shown in respective country currency.