Unit Cost Calculation field on the Work Center

The Unit Cost Calculation field on the Work Center card is a critical setting that determines how Business Central (BC) calculates the cost of labor and overhead for a production operation.

Essentially, it tells the system: "Should I multiply the cost by the Time spent, or by the Quantity produced?"

The Two Options

On the Work Center card, under the Posting FastTab, you will find a dropdown with two choices:

1. Time (Default)

This is the most common setting for manufacturing.

• How it works: The system takes the Unit Cost on the Work Center (e.g. time based rate) and multiplies it by the Run Time or Setup Time on the Routing.

• The Math: Cost = Time* Unit Cost

• Best For: Environments where labor and machine costs are directly tied to how long a job takes.

2. Units

This is a "piece-rate" or "throughput" calculation.

• How it works: The system ignores how many minutes or hours the job took. Instead, it multiplies the Unit Cost by the Output Quantity (the number of finished pieces).

• The Math: Cost = Output Quantity*Unit Cost

• Best For: Environments where you pay workers per piece produced, or where the time taken is irrelevant to the actual cost incurred.