What are lot charges in sheet metal fabrication?

Lot charges are minimum fees applied by finishing vendors to cover setup, labor, and overhead costs. These charges apply regardless of whether you order one part or many, which is why low-quantity or prototype parts can sometimes carry unexpectedly high finishing costs.

Why do lot charges affect single parts so dramatically?

Because lot charges are flat minimum fees, a single part absorbs the entire cost of setup and processing. Even if the actual finishing work costs only a few dollars, the lot charge can add hundreds to the total price when spread across just one part.

Which finishing processes typically have the highest lot charges?

Wet paint usually has the highest lot charges, often combined with additional paint and handling fees. Powder coating generally carries lower lot charges, while basic plating processes tend to be lower still. Specialized finishes like electropolishing or silk screening can vary widely depending on the vendor.

How can ordering more parts reduce the impact of lot charges?

When you order multiple parts, the lot charge is spread across the entire quantity, dramatically reducing the per-part cost. Even increasing an order from one part to a few pieces can significantly improve cost efficiency, especially if you anticipate needing additional parts later.

Can Approved Sheet Metal help reduce or avoid lot charges?

Yes. Approved Sheet Metal can help you evaluate whether a finish is truly necessary, suggest lower-cost alternative finishes, or coordinate finishing strategies that minimize lot charge impact. Early communication during the quoting process allows us to recommend cost-saving design and finishing options.

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