What are the direct costs of a project
A direct cost is any expense that can be unequivocally assigned to a specific work unit or budget line item: the labor that executes the foundation, the materials that form part of the finished building, and the machinery specifically used in that line item. If you can point exactly which line item that expense belongs to, it is a direct cost.
In the project budget, direct costs are what compose the main body of each line item: quantity of material, unit price of labor and machinery performance used in that specific unit.
What are the indirect costs of a project
Indirect costs are the expenses necessary for the work to be able to be executed as a whole, but that cannot be charged to a specific line item: the site office, water and electricity supply during execution, work insurance, general coordination personnel, and common-use tools that do not belong to a specific work unit.
The key difference is that direct cost answers 'what is being built', while indirect cost answers 'how is it made possible to build it', both are necessary, but are calculated and applied differently in the budget.
What percentage indirect costs usually represent
In construction, indirect costs typically range between 6% and 12% of the budget for material execution (BME), although the exact percentage depends on the type of work, its duration and complexity of coordination. To this percentage of indirect costs is usually added the percentage of overhead and the contractor's profit margin, until reaching the budget for contract execution.
Applying a generic indirect cost percentage without reviewing it for each specific work is a common mistake: a short and simple work needs less coordination and less overhead costs than a long work with multiple subcontractors working in parallel.
Why it matters to distinguish direct from indirect costs properly
Confusing both categories distorts the profitability analysis of the work: if an indirect cost is mistakenly charged as direct to a specific line item, that line item will appear with worse margin than real, while the rest of the budget will seem to have more margin than it actually has. The opposite effect, treating a direct cost as indirect, dilutes that expense across the entire work and makes it harder to detect if a specific line item is deviating.
Periodically reviewing which category each expense is being classified in, not just when drafting the initial budget but also during execution, is what allows maintaining reliable cost control until project completion.
How Bloqbase supports control of direct and indirect costs
Bloqbase can help keep separate in the project cost record the direct expenses charged to each line item and the general structure indirect ones, to be able to compare the actual percentage of indirect costs against what was anticipated in the budget.
The software does not decide what percentage of indirect costs to apply to a specific work: that estimate depends on the technical and economic judgment of whoever drafts the budget, adjusted to the actual characteristics of the project.