Under/over absorption - why does it happen

reddwarf
reddwarf Registered Posts: 528 Epic contributor ๐Ÿ˜
Would anyone like to explain this in a succinct way for me please?

I went round in circles in my recent test answer!

Comments

  • Paul24
    Paul24 Registered Posts: 578 Epic contributor ๐Ÿ˜
    OAR (Overhead absorption rate) is calculated by taking the budgeted fixed costs, and dividing it by the budgeted output to determine how much fixed cost should be 'absorbed' (allocated) to each single unit of output.

    During a production period, if for instance fixed overhead spend is actually more than budgeted, but say production outputs meet planned quantities, there will be an under absorption of overheads i,e not enough money has been 'absorbed' within the units produced.

    In order to account for this, an under absorption adjustment, being the difference between the actual costs incurred, and the absorbed amount would be charged to the income statement, as not enough 'cost' has gone through.

    If the fixed cost spend was actually less, then the amount absorbed in production is too high, and would therefore be adjusted in the income statement, having the opposite effect - taking cost out.
  • reddwarf
    reddwarf Registered Posts: 528 Epic contributor ๐Ÿ˜
    Okay I know all of that (thank you it's put very well!) but the scenario was a machine breakdown resulting in fewer hours of machine time in the period and the OAR had used much higher number of hours. Resulting in under absorbtion, I thought the question was after the circumstances that would cause under or over absorbtion like not selling as much as predicted or budgets being off....
  • Rachey
    Rachey Registered Posts: 589 Epic contributor ๐Ÿ˜
    Paul24 wrote: ยป
    OAR (Overhead absorption rate) is calculated by taking the budgeted fixed costs, and dividing it by the budgeted output to determine how much fixed cost should be 'absorbed' (allocated) to each single unit of output.

    During a production period, if for instance fixed overhead spend is actually more than budgeted, but say production outputs meet planned quantities, there will be an under absorption of overheads i,e not enough money has been 'absorbed' within the units produced.

    In order to account for this, an under absorption adjustment, being the difference between the actual costs incurred, and the absorbed amount would be charged to the income statement, as not enough 'cost' has gone through.

    If the fixed cost spend was actually less, then the amount absorbed in production is too high, and would therefore be adjusted in the income statement, having the opposite effect - taking cost out.

    WAW!! Please be my tutor!!! Lol :001_smile:
  • Paul24
    Paul24 Registered Posts: 578 Epic contributor ๐Ÿ˜
    Okay I know all of that (thank you it's put very well!) but the scenario was a machine breakdown resulting in fewer hours of machine time in the period and the OAR had used much higher number of hours. Resulting in under absorbtion, I thought the question was after the circumstances that would cause under or over absorbtion like not selling as much as predicted or budgets being off....

    Im sorry I dont understand what you are actually asking. Feel free to pm me if you want to explain further, or post again?
  • Dorset Student
    Dorset Student Registered Posts: 31 Regular contributor โญ
    Looks to me like the overhead absorbtion was based on machine hours instead of number of units. Therefore, if machine breaks down, it is used for less hours, so less of the costs can be absorbed than budgeted.

    Hope that helps, but I do hate this subject, so could be totally wrong!

    Tracy
  • Paul24
    Paul24 Registered Posts: 578 Epic contributor ๐Ÿ˜
    Looks to me like the overhead absorbtion was based on machine hours instead of number of units. Therefore, if machine breaks down, it is used for less hours, so less of the costs can be absorbed than budgeted.

    Hope that helps, but I do hate this subject, so could be totally wrong!

    Tracy

    No that sounds right, I didnt pick up on the OP meaning that!
  • SandyHood
    SandyHood Registered, Moderator Posts: 2,034 mod
    Okay I know all of that (thank you it's put very well!) but the scenario was a machine breakdown resulting in fewer hours of machine time in the period and the OAR had used much higher number of hours. Resulting in under absorbtion, I thought the question was after the circumstances that would cause under or over absorbtion like not selling as much as predicted or budgets being off....

    I am not adding much to Tracey's post but hope this example helps

    If the budgeted overhead cost was ยฃ300,000 and the budgeted machine hours were 150,000 hrs then you'd be expected to absorb ยฃ2 per machine hour worked

    At the end of the period if 120,000 hours were worked then ยฃ240,000 would be absorbed.
    If the actual overhead cost incurred by (or attributed to) the cost centre was ยฃ280,000 then you'll have an under absorption of ยฃ40,000.

    As there was a machine breakdown, this meant that the department did not have as many machine hours worked as they'd budgeted.
    More significant though, the overhead costs were substantially fixed costs. Things such as depreciation of equipment, salaries of foremen and insurance. As such they did not fall as machine hours fell.
    Between the two, fewer hours to absorb the ยฃ2s and most of the costs unaffected by the machine hours worked, there was a gap of ยฃ40,000 underabsorbed overhead.
    Sandy
    sandy@sandyhood.com
    www.sandyhood.com
  • reddwarf
    reddwarf Registered Posts: 528 Epic contributor ๐Ÿ˜
    Thanks everyone. But! I think our questions was after other situations (other real scenarios) eg. machine breakdown, where under or over absorbtion would result .....I am thinking things such fewer labour hours because of dispute that sort of thing...
  • Paul24
    Paul24 Registered Posts: 578 Epic contributor ๐Ÿ˜
    Thanks everyone. But! I think our questions was after other situations (other real scenarios) eg. machine breakdown, where under or over absorbtion would result .....I am thinking things such fewer labour hours because of dispute that sort of thing...

    Yes, there are many things that could lead to differences resulting in an adjustment. Labour hour variances, efficiency variances, idle time, machine efficiency, material quality etc.....
  • SandyHood
    SandyHood Registered, Moderator Posts: 2,034 mod
    Under/Over absorption can occur for one of 3 general reasons:
    1. The budgeted OAR was unrealistic - perhaps based on the wrong information
    2. The actual hours worked were more or fewer than we'd expect say because of more machines (in the case of labour hour based rates this could lead to fewer labour hours being worked). Another reason could be a change in the mix of products being produced.
    3. Some other factor causing the actual cost of overheads to rise (or fall)

    Does your firm treat machine insurance as a production overhead, could the budget be based on a modificatrion of last year's, but actual has been changed after ringing round and getting a much better quote?
    Sandy
    sandy@sandyhood.com
    www.sandyhood.com
  • reddwarf
    reddwarf Registered Posts: 528 Epic contributor ๐Ÿ˜
    Great Sandy, just what I was after.
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