Cost Structure and Amortization of Mold Development for Lock OEM
Mold costs for lock OEM are one-time capital expenditures, primarily composed of four parts: design, materials, machining, and trial runs. This cost is typically paid by the buyer but can be amortized into per-unit costs based on estimated order volume. Before requesting quotes, buyers should clarify mold ownership, the maximum number of revisions, and the basis for production amortization to avoid unexpected additional costs.
The Four Main Components of Mold Costs
Mold quotes are usually broken down into four areas: DFM design evaluation, mold materials and machining methods, CNC or EDM machine hours, and the number of trial runs and mold revisions. Different lock body structures (TSA padlocks, combination lock cabinets, IoT smart lock housings) require different cavity counts and precision levels, resulting in significant cost differences. When receiving quotes, buyers should ask suppliers to list each item so they can compare whether the basis of quotes from different suppliers is consistent.
Items to Clarify When Requesting Quotes
Mold Ownership
Confirm whether the mold is registered under the buyer or the factory to avoid obstacles in transferring orders in the future.
Maximum Number of Revisions
The contract should specify the number of free mold revisions, with additional revisions charged at a separate rate.
Amortization Basis
Agree on the per-unit amortization amount or the amortization schedule to ensure production costs are predictable.
Mold Storage Location
Confirm whether the mold is stored at the factory or a third-party warehouse, as well as the transfer process.
How Per-Unit Costs Are Amortized
The one-time mold cost is not fully recovered in the first order but is amortized across the estimated total order volume. For example, if the mold cost is A dollars and the estimated order volume is B units, the theoretical amortized amount per unit is A÷B. However, the actual per-unit cost also needs to account for mold changeover, cleaning, and defect rate labor hours. The larger the order volume and the longer the product lifecycle, the lower the per-unit amortization; conversely, if production does not reach the estimated volume, the mold cost becomes a sunk cost for the buyer.
Hidden Costs Buyers Often Overlook
In addition to the mold itself, buyers should also consider: the material costs for the first trial run (usually paid by the buyer), sample costs for certification testing, and mold maintenance and repair costs after production begins. If these items are not agreed upon in advance, disputes can easily arise during the production phase. It is recommended to request a complete cost list from the supplier before signing the contract and include it in writing in the purchase agreement.
Need a Mold Cost Evaluation Sheet?
Contact Jin Tai Industry with your lock specifications and estimated order volume, and we will provide a detailed quote based on your actual needs.