# Fixed overhead variances (easy)

Anzelari
Posts:

**8**Registered
Hi everyone,

Hope the following will help you calculate fixed overhead variance very quickly.

After 2 days of trying to remember all the formula used to calculate the variances. I remembered what our professor was saying in the university: "Mathematics do not have to remember they have to get it using the logic".

And I found the logic in fixed overhead calculations. Just remember easy formulas S-A = (S-B) + (B-A) and S-B = (S-AA) + (AA-B), where

B - Budgeted overheads, S - Standard overheads, A- Actual overheads, AA- Absorbed overheads

B and A are usually known, Standard overheads = OAR x standard hours (calculated using flexing budget rules), AA = actual hours x OAR

please, see the picture for more information

Hope the following will help you calculate fixed overhead variance very quickly.

After 2 days of trying to remember all the formula used to calculate the variances. I remembered what our professor was saying in the university: "Mathematics do not have to remember they have to get it using the logic".

And I found the logic in fixed overhead calculations. Just remember easy formulas S-A = (S-B) + (B-A) and S-B = (S-AA) + (AA-B), where

B - Budgeted overheads, S - Standard overheads, A- Actual overheads, AA- Absorbed overheads

B and A are usually known, Standard overheads = OAR x standard hours (calculated using flexing budget rules), AA = actual hours x OAR

please, see the picture for more information

## Comments

8Registered8Registered8Registered39Registered, TutorI prefer - Total OH Variance is the difference between what it

didcost and what itshould havecost.This total variance breaks down into

expenditurevariance (which ignores the 'should have' bit) andvolumevariance.Volume then breaks down again into

efficiencyandcapacity.Capacity Variance is the one that usually causes problems as it is not so instinctive. If we actually use fewer hours than the original base budget, this is Adverse because we ae not fully using those assets we have invested in.

8Registered149Registered, TutorIn your example, each unit should take 0.005 hours (500/100,000) and you recover £100 overhead per hour (£50,000/500)

So, 96,000 units should take 480 hours (96,000 x 0.005)

They actually took 510 hours, 30 hours too long

This is an efficiency problem, which reduces your overhead recovery by £3,000 (30 hrs x £100/hr)