Definition

Direct materials are materials used exclusively (or primarily) on a specific job—lumber for a deck, drywall for a build-out, concrete for a slab. They are purchased for the job and charged to that job’s cost. Materials that support multiple jobs or general operations (e.g., shop supplies) are indirect.

Why It Matters

Materials are often the largest cost after labor. Assigning them to the right job is critical for job profitability and for comparing estimate to actual. Misallocated materials distort job reports and make it hard to improve estimating. Direct materials also drive inventory and purchasing decisions when tracked by job.

Field Example

A contractor buys $4,200 of lumber and hardware for Deck Project #301. The invoice is coded to Job #301 and cost code “Framing/Lumber.” The job cost report shows $4,200 in direct materials for that job. A separate purchase of saw blades and drill bits for the shop is not charged to any job (indirect).

Calculation / Formula (if applicable)

Direct materials cost for a job = Sum of all material purchases (or allocations) assigned to that job for the relevant period or life of job.

Software Application

When recording material purchases or deliveries, require or suggest a job and optionally a cost code. Support splitting one invoice across multiple jobs if needed. Report direct materials by job and by category. Link to purchase orders or receiving if the workflow includes them.

Tooltip Version

Direct materials are supplies and materials used on a specific job; assigning them to that job is how you get accurate job cost and margin.

Direct Materials