Overtime vs. Hiring Break-Even: How to Calculate When to Hire
Compare overtime cost to the true cost of a new hire using a fully burdened labor rate and staffing break-even analysis. Learn the math, why the fully burdened rate matters, and how to factor in the cost of employee burnout.
The Methodology: How we calculate your break-even point
Total hourly cost of overtime
- Rbase (Base rate):The employeeโs base hourly rate before overtime.
- Mot (OT multiplier):The overtime multiplier (e.g. 1.5 for time-and-a-half).
- Efatigue (Fatigue factor):A factor โค 1 that models productivity decay at high overtime (e.g. 0.9 for 10% decay, 0.75 for 25% decay). When off, use 1.
The effective cost per hour of overtime, including a productivity decay factor when sustained OT is high:
where:
When the fatigue factor is off, E_fatigue = 1. When itโs on, we use a tiered factor (e.g. 0.9 or 0.75) so that the โcostโ reflects both pay and the hidden loss of effective output.
Fully burdened new-hire rate
- Sannual (Salary):The target annual salary for the new hire.
- B (Burden):Employer burden as a decimal (e.g. 0.25 for 25%): payroll taxes, benefits, and overhead on top of base pay.
The hourly cost of a new hire including salary and burden (taxes, benefits, overhead):
where:
2080 is the standard number of paid hours per full-time year (40 ร 52).
Break-even point (months)
- Ocost (Onboarding cost):One-time cost to recruit, train, and ramp the new hire to productivity.
- Hweek:Total overtime hours per week across all employees on OT (e.g. 5 people ร 12 hrs each = 60).
- 40:Full-time equivalent hours per week per new hire used to convert C_hire to a monthly cost.
The number of months until cumulative new-hire cost (onboarding + monthly burdened cost) equals cumulative overtime cost:
where:
4.33 is the approximate number of weeks per month (52/12). The denominator is the monthly difference: OT cost per month minus new-hire cost per month. If that difference is zero or negative, hiring is cheaper from month one (or break-even is undefined).
Why managers get this wrong
The invisible leak: productivity decay
Sixty hours of work does not equal sixty hours of output. When people work sustained overtime, output per hour dropsโmistakes increase, collaboration and creativity suffer. Research on overtime in demanding roles shows clear diminishing returns. The calculatorโs fatigue factor turns that into a dollar โefficiency leakโ so you see the real cost of paying for hours that donโt deliver full value. Ignoring that leak makes overtime look cheaper than it is.
The fully burdened rate: why a $30/hr employee costs more
A $30/hr employee does not cost the company $30/hr. Add employer payroll taxes (FICA, unemployment, etc.), benefits (health, retirement, PTO), and a share of overhead (recruiting, equipment, space). A 25% burden puts the real cost at $37.50/hr; 30% puts it at $39. Comparing overtime at 1.5ร ($45/hr) to โ$30โ understates the gapโyou must compare to the burdened new-hire rate (e.g. $36โ39/hr) to get an honest staffing break-even analysis.
Research & Methodology
Why we include a Fatigue Factor
Because human beings arenโt machines. Industrial research shows that when you ask a team to work 60 hours a week, you arenโt getting 60 hours of "prime" work. Youโre getting 40 hours of great work and 20 hours of expensive, fatigued work that is prone to mistakes. The calculatorโs Fatigue Factor quantifies that leak so you can compare the true cost of overtime to the cost of hiring.
The productivity decay function (effective hours)
- Htotal:Total paid hours (including overtime).
- L (Leakage factor):The fraction of those hours that do not translate into full outputโ0.10 for OT > 10 hrs/week, 0.25 for OT > 20 hrs/week, matching research on diminishing returns beyond ~50 hours/week.
We model effective output as a share of total hours paid, using a leakage factor L:
where:
L is the leakage factor: 0.10 for moderate overtime (e.g. OT > 10 hrs/week), 0.25 for high overtime (e.g. OT > 20 hrs/week). So 60 hours at L = 0.25 yields 45 effective hours.
The real cost of a fatigued hour
The cost per effective hour of output when you pay an OT rate but get less than full output:
So a $45/hr OT rate with a 25% leak (L = 0.25) means each effective hour of output costs the business $45 รท 0.75 = $60. You pay for 60 hours but receive the equivalent of 45; the hidden cost is that premium per effective hour.
Example: $45/hr OT with L = 0.25 โ cost per effective hour = $60.
Overtime vs. Hiring Break-Even FAQ
What is a 'Fully Burdened' labor rate?
A fully burdened rate includes not only base salary or hourly pay but also employer-side costs: payroll taxes (e.g. FICA, unemployment), benefits (health, retirement, PTO), and overhead (recruiting, equipment, space). A $30/hr employee can easily cost the company 25โ40% more once burden is appliedโso the burdened rate is what you use when comparing overtime cost to the true cost of a new hire.
How do you calculate the cost of employee burnout?
We model it as productivity decay: at high overtime (e.g. 50+ hours), output per hour drops. Research on sustained overtime shows diminishing returnsโmore hours paid does not mean proportionally more output. The calculator applies a fatigue factor (e.g. 10% for 10โ20 OT hrs/week, 25% above 20) to estimate the 'invisible leak': you pay for 60 hours but get something less than 60 hours of effective work. That gap is the cost of burnout risk we quantify.
Does this calculator account for recruitment fees?
Yes, via the Onboarding Cost field. Enter your one-time cost to bring a new hire to productivity: recruiting fees, background checks, training, equipment, and lost productivity during ramp-up. That amount is included in the new-hire track so the break-even point reflects when you've recouped that investment. If you don't use recruitment agencies, use an estimate of internal time and training cost.
Is it always better to hire than to pay overtime?
No. It depends on how long you need the capacity. If the need is short-term (a few months), overtime can be cheaper because you avoid onboarding cost and commitment. The calculator shows the break-even month: before that, OT is cheaper; after that, the new hire is cheaper on a cumulative basis. Use that plus your forecast for demand to decide whether to hire now or manage with OT.
What is the standard employer payroll burden?
A common benchmark in the US and Canada is 25โ30% on top of base salary. That covers employer payroll taxes, benefits, and often a slice of overhead. The calculator defaults to 25%; adjust the Payroll burden % field to match your industry and benefits level. Public-sector and highly benefited roles often sit at 30% or higher.
How accurate is the 'Fatigue Factor' model?
It's a simplified proxy. Studies on sustained overtime (e.g. construction, healthcare, tech) show that output per hour declines beyond roughly 45โ50 hoursโerrors rise, creativity and collaboration drop. We use a tiered factor (e.g. 10% decay for 10โ20 OT hrs/week, 25% above 20) to approximate that effect. Your real numbers may vary by role and culture; use the toggle to compare scenarios with and without fatigue to see how it shifts break-even and hidden cost.