What is the main difference between unit pricing and lump sum pricing?

Unit pricing involves calculating costs based on each unit of work or item required for a project. This method allows for a clear breakout of costs associated with individual components, making it ideal for projects where quantities can vary or where future adjustments may be necessary as the project progresses. Contractors can adjust their bids based on the actual quantity of work performed or required, leading to potentially more accurate cost estimates for clients.

In contrast, lump sum pricing consolidates all costs into a single, fixed price for the entire project. This approach provides the client with a clear total cost upfront, minimizing uncertainty about overall project expenses. However, it lacks the granularity of unit pricing and does not allow for flexible adjustments based on changes in the quantities of work performed.

This distinction is significant because it influences how contractors price their work and how clients understand and control costs throughout the project. Understanding the nature of these pricing methods aids in project management and financial planning.