BOM Cost Roll-Up Excel Model with Duty & Logistics Calculators

This Excel resource implements a hierarchical Bill of Materials (BOM) structure where each parent item (e.g., final product) references child components with quantities, unit costs, and sourcing attributes (e.g., country of origin, supplier location). Cost roll-up occurs recursively: the total cost of a parent item equals the sum of its direct component costs plus allocated manufacturing overhead, plus applicable import duties (calculated as a percentage of CIF or FOB value based on Harmonized Tariff Schedule (HTS) codes), and logistics surcharges (e.g., ocean freight per kg, customs brokerage fees, duty drawback eligibility). The model typically employs Excel’s native features—structured tables, named ranges, XLOOKUP/VLOOKUP for tariff lookups, Data Validation for Incoterm selection, and conditional formatting for cost outliers—while avoiding volatile functions to ensure scalability. Advanced versions incorporate sensitivity dashboards, currency conversion using real-time or historical exchange rates (via Power Query or API-linked web queries), and audit trails for cost assumptions. Practically, it bridges engineering BOMs (eBOM) and manufacturing BOMs (mBOM) by mapping design intent to procurement reality, enabling cross-functional alignment between procurement, finance, logistics, and product management teams during new product introduction (NPI) or cost-reduction initiatives.