Bills of Quantities vs Cost Estimate: What You Need Before Tendering
Understand the difference between early estimates, cost plans, BoQs and tender pricing so you use the right tool at the right stage.
A cost estimate is not a tender document
An early estimate helps a client decide whether a project is broadly affordable. It may use rates per square metre, assumptions and broad allowances.
A bill of quantities is a measured document used for pricing, tender comparison and contract administration.
Use the right cost tool at the right stage
At feasibility stage, a cost estimate may be enough. At tender stage, a BoQ helps contractors price the same scope and reduces ambiguity.
Jumping to tender without proper quantities can create disputes, missing items and weak cost control.
QS advice protects the client
A quantity surveyor helps translate drawings and specifications into measurable cost information.
For developers, this protects decision-making from feasibility through procurement and final account.
Next step
Turn this insight into a project decision
Use the free check or calculator while the question is still fresh. If the numbers make sense, continue into report delivery, capture and project setup.
Explore QS and BoQ servicesFrequently asked questions
Can I tender with only a cost estimate?
You can request rough prices, but a formal tender is stronger with coordinated drawings, specifications and a measured BoQ.
Who prepares a bill of quantities?
A quantity surveyor typically prepares the BoQ from drawings, specifications and agreed measurement standards.