How do you calculate the indirect labor ratio?

Multiply direct hours by the indirect rate per direct hour and by the allocation coverage, then add fixed supervision. With 500 hours, $9.50/hr, 100% coverage and $1,200 fixed you get 500 × 9.5 × 1.0 + 1,200 = $5,950.

What is a good indirect-to-direct labor ratio?

It varies by industry, but many discrete manufacturers target 1 indirect head per 4-6 direct heads, or an indirect labor burden of 15-30% of direct labor dollars. Above that, examine spans of control and support processes.

What counts as indirect labor?

Anyone who supports production without touching a specific product: supervisors, schedulers, quality inspectors, material handlers, maintenance and tool-crib staff. The $9.50/hr rate here spreads their pay across each direct hour.

What does the per-unit indirect cost mean here?

Dividing the $5,950 total by the run's units gives $11.90 per piece — the support-labor burden each part carries in addition to its own direct labor.

Why separate variable from fixed indirect cost?

The variable $4,750 flexes with direct hours, while the fixed $1,200 supervision cost stays put whether you run one shift or three. Knowing the split tells you which costs actually drop when volume falls.

Should supervision be fixed or in the rate?

Front-line supervision is usually step-fixed — you don't add a supervisor per direct hour — so entering it as the $1,200 fixed adder is more honest than burying it in the per-hour rate.

Workforce, Labor Standards & Skills Planning calculator

Indirect Labor Ratio Calculator

The indirect labor ratio expresses the cost of support staff — supervisors, material handlers, inspectors, planners — as a burden applied on top of every direct labor hour. Controllers and cost engineers use it to recover indirect payroll through an absorption rate so it lands on jobs instead of sitting unallocated in overhead. It matters because indirect headcount is where lean plants quietly bleed cost: if the ratio drifts up, you're adding support people faster than you're adding value-adding output.

What this calculator does

Translates an indirect-to-direct labor relationship into the support-labor dollars a job should carry.
A plant controller uses it to load the right amount of indirect labor onto direct hours for absorption.
It applies an indirect rate to a direct-hour base, scales it by the allocation coverage, and adds fixed supervision to give total and per-direct-hour indirect labor cost.

Formula used

Indirect labor cost = direct hours x indirect rate x allocation coverage + fixed supervision
Indirect cost per direct hour = indirect labor cost / direct hours

Inputs explained

Direct labor hours in the base:
Indirect rate per direct hour:
Allocation coverage of the base:
Fixed supervision / salaried cost:

How to use the result

Use it when setting or auditing an indirect labor absorption rate, or benchmarking how much support cost each direct hour is carrying.
It assumes indirect cost scales cleanly with direct hours; in reality much support cost is step-fixed, so at low volumes the per-hour figure understates true burden and at high volumes it can overstate it.

Current U.S. benchmarks

Manufacturing hourly earnings average $30.27 (BLS, Jun 2026), up 4.4% from a year earlier. Median machinist pay is $28.24/hr (OEWS 2025), with state medians on each state page. Manufacturers have 529k open positions nationally (BLS JOLTS).

Common questions

How do you calculate the indirect labor ratio? Multiply direct hours by the indirect rate per direct hour and by the allocation coverage, then add fixed supervision. With 500 hours, $9.50/hr, 100% coverage and $1,200 fixed you get 500 × 9.5 × 1.0 + 1,200 = $5,950.
What is a good indirect-to-direct labor ratio? It varies by industry, but many discrete manufacturers target 1 indirect head per 4-6 direct heads, or an indirect labor burden of 15-30% of direct labor dollars. Above that, examine spans of control and support processes.
What counts as indirect labor? Anyone who supports production without touching a specific product: supervisors, schedulers, quality inspectors, material handlers, maintenance and tool-crib staff. The $9.50/hr rate here spreads their pay across each direct hour.
What does the per-unit indirect cost mean here? Dividing the $5,950 total by the run's units gives $11.90 per piece — the support-labor burden each part carries in addition to its own direct labor.
Why separate variable from fixed indirect cost? The variable $4,750 flexes with direct hours, while the fixed $1,200 supervision cost stays put whether you run one shift or three. Knowing the split tells you which costs actually drop when volume falls.

Last reviewed 2026-05-12.