What it means
Many businesses set a standard cost for each unit of output, including how many labour hours it should take and what each hour should cost. When the period ends, the actual labour bill almost never matches the standard.
The total labour variance puts a dollar figure on the gap. The total on its own is not very helpful, because the same dollar overspend could come from paying too much per hour or from using too many hours.
That is why the total is broken down into two pieces: the labour rate variance and the labour efficiency variance. The two add up exactly to the total, and each points to a different cause and a different owner.
Looking at the pieces can reveal a story the total hides. A company may show a small total variance, but only because a $20,000 unfavourable rate variance from overtime was offset by a $20,000 favourable efficiency variance from faster work.
The net looks fine, yet the underlying pattern, which is expensive but quick labour, deserves a conversation. Variances are compared against the flexed budget, meaning the standard for the actual output rather than the planned output.
This prevents a busy month from looking like an overspend simply because more units were made. It also keeps the measure fair when volumes fall short of plan.
Finance teams use labour variances as a prompt for investigation, not a verdict. A variance can come from a standard that was wrong, a one-off event, a change in staff mix or a real operational problem.
The sensible approach is to set a threshold, investigate anything above it and update standards when conditions have clearly changed. Timing and data quality also matter.
Labour cost can include accruals for unpaid overtime, holiday pay and bonuses, so a month-end variance may partly reflect accounting entries rather than real changes on the shop floor. Reviewing the variance after payroll has been fully accrued gives a truer picture.
In practice
Real-world examples
Example 1
A bakery chain compares its monthly wage bill with the standard cost of the loaves produced. The total variance is small, but the breakdown shows a rate overspend from weekend premiums balanced by faster output. The manager decides to keep the weekend shifts but review the premium.
Example 2
A shipyard bids for a vessel refit using standard labour hours. At completion, actual hours exceed the standard by 8%, creating a large unfavourable efficiency variance. The finance team uses the data to price the next refit more realistically.
Example 3
A call centre sees a favourable total labour variance after using more junior staff. The quality team reports that customer satisfaction fell over the same period. Management concludes that the saving came at the expense of service and revisits the staffing mix.
Think of it
Labor variance is like planning to spend 50 pounds on fuel for a road trip based on an efficient route, but ending up spending 70 pounds because you hit traffic and had to take a longer detour.
Formula
Calculation
Total labour variance = Actual labour cost - Standard labour cost for actual output
Total labour variance = Labour rate variance + Labour efficiency variance
A factory made 5,000 units with a standard of 2 hours per unit at $20 per hour, so the standard labour cost was 5,000 x 2 x 20 = $200,000. It actually used 10,600 hours at an average of $22.50, so the actual cost was 10,600 x 22.50 = $238,500. The total variance is 238,500 - 200,000 = $38,500 unfavourable. The rate variance is (22.50 - 20) x 10,600 = $26,500 and the efficiency variance is (10,600 - 10,000) x 20 = $12,000, and 26,500 + 12,000 = $38,500, which matches.Case study
Seen in the real world
Aldermoor Toys is an illustrative, fictional manufacturer that produces seasonal gift sets. In the run-up to the holiday season, its monthly labour variance jumped to about $46,000 unfavourable. The founder assumed workers had become slower and asked the plant manager to tighten supervision.
The cost accountant split the number. Only $9,000 was efficiency; the other $37,000 was rate, caused by agency workers hired at a premium to cope with the seasonal peak. Armed with that, the founder stopped chasing the shop floor and instead negotiated a pool of pre-trained seasonal staff for the following year at a lower hourly cost.
Watch out
Common mistakes
- Reading the total variance as a single story, when the rate and efficiency parts often point in opposite directions.
- Comparing actual cost with the original budget rather than the standard cost of the actual output produced.
- Treating every unfavourable variance as bad management, when the standard itself may be out of date.
Questions
People also ask
What does an unfavourable labour variance mean?
It means actual labour cost was higher than the standard for the work done, because of higher pay rates, more hours or both.
Who is responsible for labour variances?
Rate variances usually sit with whoever sets pay and staffing mix, while efficiency variances usually sit with the production or operations manager.
Is a favourable labour variance always a good result?
Not necessarily, because it can come from rushed work, lower quality or a standard that was set too generously.