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Overhead absorption rate Calculator

Allocate overhead by productive hours or units and estimate the burden for a job. This free overhead absorption rate calculator shows the calculation and its assumptions so you can compare your own figures.

How the overhead absorption rate calculation works

Hourly overhead = annual overhead ÷ productive hours; unit overhead = annual overhead ÷ units produced.

Hour-based and unit-based allocations are alternatives, rather than costs to add together. Use achievable production capacity.

Using this calculator

  1. Enter your own figures in the labelled inputs. Keep the currencies, units and time periods consistent.
  2. Choose any applicable rate profile, pattern or assumption shown for this tool. Open additional inputs when relevant.
  3. Review overhead per productive hour and overhead per unit, then read the stated assumptions and eligibility conditions before using the result.

Worked example

This is a static example using illustrative inputs, not facts about you or today’s date. The displayed eligibility selections and assumptions apply only to this example.

See example inputs
Annual overhead (€)
150000
Annual productive hours
6000
Annual units produced
25000
Job productive hours
30
Job units
100
Overhead Per Productive Hour
€25.00
Overhead Per Unit
€6.00
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