A project cost breakdown is an itemised list of everything a construction project is expected to cost, split into categories such as labour, materials, equipment, subcontractors and General Conditions. It gives owners and contractors a line-by-line view of where money is allocated, so spending can be tracked and compared against the budget as the job proceeds. Most contractors structure the breakdown around the same cost codes used in the original estimate, so figures stay comparable from tender through to Final Account instead of being re-sorted at every stage.
A worked example
A £2.5 million extension and refurbishment might break down as £900,000 for labour, £950,000 for materials, £150,000 for equipment hire, £400,000 for Subcontractor packages and £100,000 for general conditions, totalling the £2.5 million budget. Partway through the job, the materials line shows £1,010,000 committed against its £950,000 Allowance, a £60,000 variance driven by a rise in steel prices, while labour is tracking £40,000 under its allowance because less overtime was needed than planned. Equipment and subcontractor packages are both running close to their original allowances at this stage.
Where it sits in a budget or CVR
The cost breakdown is usually the first structure set up on a project, before any order or invoice exists, and every Purchase Order (PO), Subcontract and invoice is then coded against one of its lines. In a Cost Value Reconciliation (CVR), the same categories carry forward as the columns for budget, committed cost, actual cost and forecast final cost, so a variance like the £60,000 on materials above is visible as soon as it's committed, not just at month end.
Related terms: Cost Breakdown Structure (CBS) (CBS), Job Costing, Cost Value Reconciliation (CVR), Variance Analysis.
Planyard builds the cost breakdown directly from an imported estimate and its cost codes, then updates the committed and actual cost on each line automatically as orders and invoices are added. See construction budget software.
FAQs
How is a project cost breakdown different from a budget?
A budget sets the amount allocated to each category before work starts. A cost breakdown is the same structure carried through the job, showing what's been committed and actually spent against each category as it changes.
Why is tracking cost breakdowns important?
It shows an overrun on an individual category, such as the materials line above, while there's still time to act on it, instead of only as a single total variance once the project is finished and the money is already spent.