Overhead rate

An overhead rate allocates indirect operating costs across direct labor or another selected cost base.

Where a Firm’s Fee Dollar Goes

Definition

An overhead rate expresses indirect operating costs in relation to a chosen allocation base, often direct labor cost. Indirect costs may include rent, administrative support, software, or other expenses that support the firm but are not assigned directly to a project. Firms choose which costs to include, whether labor burden belongs in the base, and whether to allocate by labor dollars, hours, or another measure. The resulting rate can differ by office, service line, reporting period, and purpose. A rate for internal pricing analysis may not use the same rules as a rate prepared for a contract or other specific requirement. Owners use it to understand the cost of supporting project delivery and to inform pricing models. It is not a profit margin or a direct measure of cash overhead, and it does not show project performance by itself. A consistent definition matters when comparing periods. See the multiplier and overhead rate tool and how firms set hourly billing rates.

How owners use it

• Relate indirect operating costs to direct labor when reviewing the cost structure behind project delivery.
• Compare overhead trends only when included expenses and allocation bases remain consistent.
• Example: $420,000 of indirect costs divided by $600,000 of direct labor cost gives an overhead rate of $420,000 / $600,000 = 70%.
• Identify included costs and the chosen base, such as labor dollars or hours, in reports used for pricing.

Related terms

• Direct laborDirect labor is employee compensation assigned to client project work under a firm's accounting and project tracking policies.
• Labor burdenLabor burden is the employer cost associated with labor beyond base wages, such as payroll taxes, benefits, or insurance.
• MultiplierA multiplier compares a firm's revenue or fee amount with the labor cost assigned to that work.
• Operating marginOperating margin is operating income divided by revenue, expressed as a percentage.

Related guides and articles

• Multiplier and overhead rateSee how direct labor cost and indirect costs shape a labor multiplier.
• How should a civil engineering firm set its hourly billing rates?Start with what it costs the firm to deliver work, then decide how much of that cost the rates need to recover.
• Operating benchmarks for civil engineering firmsA useful benchmark starts with a consistent definition, a clean denominator and a peer group that resembles your firm.