What it means
There are two common versions of the burden rate and it pays to know which one a colleague means. Labour burden covers everything an employer spends on a person on top of their gross wage, while inventory or factory burden covers the manufacturing overheads absorbed into the cost of goods produced.
Both answer the same question: what does this activity really cost once the invisible costs are included? Labour burden is the version most managers meet.
A salary is only part of the picture, because the employer also pays payroll taxes, pension contributions, health cover, holiday and sick pay, training, equipment, software licences and a share of supervision. Adding those together and dividing by direct wages gives a percentage that can be applied to any wage figure.
The number matters most when quoting work. A service business that prices jobs from raw wage rates will believe it is making a healthy margin while quietly losing money, because a third or more of the true labour cost was never in the calculation.
This is the single most common cause of profitable-looking businesses running out of cash. Factory burden works similarly but uses a different base.
Total indirect production costs, such as machine depreciation, factory rent, power, maintenance and quality control, are divided by an activity measure like machine hours or direct labour hours, giving a rate that is applied to each unit produced. Under absorption costing those absorbed overheads become part of inventory value on the balance sheet.
The main nuance is the choice of allocation base, because a poorly chosen base spreads cost in a misleading way. If one product line is highly automated and another is labour intensive, allocating all factory overhead on labour hours will overstate the cost of the manual line and understate the automated one.
Activity based costing exists precisely to attack that distortion, and applied rates are trued up at year end against what was actually spent.
In practice
Real-world examples.
Example
A building contractor pays its crew $28 an hour and calculates a labour burden of 38%, giving a fully burdened rate of $38.64 an hour. All tender pricing is built from the burdened figure rather than the wage. Competitors bidding from raw wages regularly undercut the contractor and then struggle to complete the work profitably.
Example
A components manufacturer has $1,800,000 of annual factory overhead and runs 60,000 machine hours, giving a burden rate of $30 per machine hour. A product that takes two machine hours absorbs $60 of overhead on top of its materials and direct labour. That absorbed cost stays in inventory until the unit is sold.
Example
A consultancy pays an analyst $90,000 a year and applies a 35% burden, making the fully loaded cost $121,500. With 1,500 billable hours available in the year, the internal cost is $81 an hour. The firm bills clients at $200 an hour, and partners use the $81 figure to judge whether a discounted rate still makes sense.
Formula
Calculation
Labour burden rate = Total indirect employment costs / Total direct labour cost
Fully burdened labour cost = Direct labour cost x (1 + Burden rate)
Worked example: an engineering services firm pays $2,100,000 in direct wages over a year. Its indirect employment costs, covering employer payroll taxes, pension contributions, health cover, holiday pay, training, tools and supervision, come to $840,000.
Burden rate = $840,000 / $2,100,000 = 0.40, or 40%
An engineer paid $30 an hour therefore costs $30 x 1.40 = $42 an hour fully burdened.
Now apply that to a job needing 500 engineering hours:
Direct labour = 500 x $30 = $15,000
Burden = $15,000 x 40% = $6,000
Fully burdened labour cost = $15,000 + $6,000 = $21,000
If the firm had quoted the job at direct cost plus a 25% mark-up, the price would have been $15,000 x 1.25 = $18,750, which is $2,250 below the true labour cost of $21,000 before any allowance for materials, office overhead or profit.Case study
Seen in the real world.
Ridgeway Fabrication is an illustrative, entirely fictional metal fabrication shop that had been quoting work for years using bare hourly wages plus a 30% mark-up. Sales grew steadily, the order book was full, and yet the bank balance kept drifting downwards, which is the classic symptom of a burden rate that has never been calculated.
A new accountant added up the indirect employment costs: employer payroll taxes, pension contributions, protective equipment, holiday pay, downtime between jobs and two supervisors whose wages had always been treated as an overhead. Against $1,600,000 of direct wages, those costs came to $672,000, a burden rate of 42%. On a typical job the shop had assumed $20,000 of labour cost when the true burdened cost was $20,000 x 1.42 = $28,400, turning an expected $6,000 profit into a $2,400 loss.
Ridgeway rebuilt its quoting spreadsheet around burdened rates and repriced its next round of tenders. It lost two price sensitive customers and kept the rest, and within two quarters the illustrative company was generating cash rather than consuming it. Nothing about the work had changed; only the honesty of the cost figure had.
Watch out
Common mistakes.
- Quoting jobs from gross wages alone, which systematically underprices work and hides losses inside a growing order book.
- Applying a burden rate copied from an industry rule of thumb rather than calculating it from the company's own payroll and overhead figures.
- Allocating all factory overhead on direct labour hours when production is largely automated, which distorts the cost of every product line.
Questions
People also ask.
What is typically included in labour burden?
Employer payroll taxes, pension and retirement contributions, health and other insurance, holiday and sick pay, training, tools, protective equipment, and often supervision and non-billable time.
How often should a burden rate be recalculated?
At least annually and whenever something material changes, such as a pay award, a new insurance contract, a change in headcount mix or a large equipment purchase.
Is the burden rate the same as a mark-up?
No, the burden rate converts a wage into its true cost, whereas a mark-up is added afterwards to that true cost to produce a selling price and a profit.
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