Why You Can't Just Average 40 Hours Over a Bi-Weekly Period
October 23, 2026
A common mistake is treating 80 hours across a two-week bi-weekly period as the relevant overtime threshold (as if averaging to 40 hours/week were what matters) — but FLSA overtime is based on 40 hours in each individual, fixed workweek, not an 80-hour combined or averaged figure.
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Open the Bi-Weekly Time Card Calculator →Why the Mistake Looks Reasonable
80 hours over two weeks does average to 40 hours/week, which can make it feel like a valid way to check for overtime — but this averaging approach can completely miss overtime that's actually owed if the hours aren't evenly distributed.
A Case Where Averaging Hides Real Overtime
An employee working 50 hours in week 1 and 30 hours in week 2 totals exactly 80 hours — averaging suggests no overtime at all. But calculated correctly per workweek, week 1 alone has 10 overtime hours (50 − 40), which the averaging approach would completely miss.
Frequently Asked Questions
Is 80 hours over two weeks the correct overtime threshold?
No — this averaging approach is a common mistake; overtime is based on 40 hours per individual workweek, not a combined or averaged two-week figure.
Can averaging hide real overtime owed?
Yes — an employee working 50 hours one week and 30 the next totals 80 hours (no apparent issue by averaging), but actually has 10 overtime hours in the 50-hour week when calculated correctly.
What's the correct way to check for bi-weekly overtime?
Check each individual workweek against the 40-hour threshold separately, not the combined two-week total.
Why does this mistake happen so often?
Because bi-weekly pay periods are a payroll convenience that can make the two-week total feel like the relevant unit, when the legal unit for overtime is the individual workweek.