在管理会计中,如何用公式推导出完全成本法下计算的税前利润与变动成本计算法下计算的税前利润的差额?

2025-03-04 08:59:35
推荐回答(1个)
回答1:

一、月末暂估入账的方法根据企业会计制度规定,企业应对材料已到达并已验收入库的物资办理暂估入库,以保证存货的真实性、完整性。暂估入库主要有以下几种情况:1.材料已到达并验收入库,但相关化验数据还未出来,未制作结算清单;2.已对外结算但增值税发票等结算凭证未收到;3.已对外结算、发票也到企业,但业务人员未到财务部门进行报销的采购业务。企业应于月末按照材料的暂估计划金额进行账务处理,借记“原材料”科目,贷记“应付账款-暂估应付款”科目。二、外购物资计划价的修订及其账务处理1、计划价及其修订。企业制定的计划价应尽可能接近实际采购价(不含税),并包含由企业承担的应计入材料实际成本的杂费。计划价不同于企业内部市场的计划限价。制定计划价时要认真仔细,考虑全面,减少出错或偏差情形,并要考虑到未来一段时间内采购价的变动走势因素。除一些特殊情况外,计划价在年度内一般不作调整。在计划价偏离实际价较大的情况下,企业需要修订计划价,最好选择在年初修订计划价,这样让物资管理部门(或仓储部门)过账更方便、直观。企业修订计划价必须要有一套明确、完整、规范的计划价修订机制,并与物资管理部门协调好,基准日把握一致,财务、物资管理部门双方步调一致,这也是“账实相符”一种形式上的反映。2、账务处理修订计划价后账务处理格外重要,否则就会造成财务的原材料科目账面余额与物资管理部门材料结存余额不符。如果企业决定在年度的1月1日启用修订后的新计划价,那么此时尚且存在着一批因发票账单未到达而尚未报账的验收单(即上年末的暂估验收单),这些验收单在上一年度出具,上面的计划价都是老计划价。针对计划价的修订,账务处理有两种方案。这两种方案的核心原则是要保证暂估验收单(即入库单)新旧计划价之差额对应的材料成本差异只能释放一次。企业可以选择在年初进行与计划价修订相对应的账务处理,或者选择于上年末在企业当月材料成本差异分配后进行账务处理。方案一:修订计划价时对暂估验收单的计划价同时进行更改,今后这部分验收单报账时使用新计划价。这种方案工作量大,更改验收单计划价时容易出错。借记“原材料”科目,贷记“材料成本差异”科目,这个数据来自物资管理部门,是物资管理部门上年末结存材料的新旧计划价总额之差额;企业同时借记“材料成本差异”科目,贷记“应付账款-暂估应付账款”科目,这个数据来自汇总的上年末暂估验收单新旧计划价总额之差额。这时就相当于将上年末暂估验收单调整成新计划价进行暂估了,此时暂估验收单新旧计划价差异尚未释放,在今后以新计划价报账时再进行释放。根据公式,上月末暂估验收单计划价金额+本月新验收单计划价金额=本月报账的验收单计划价金额+本月末暂估验收单计划价金额,这属于推导公式的两边同时缩放(上年末暂估验收单调整成新计划价,在本年度报账时也使用新计划价),在上年末的暂估验收单全部报账后,公式两端实现平衡。3、其他。(1)如果企业不是大规模修订计划价,需要个别调整偏差较大的计划价的,除可以通过以上方法调整外,还可以通过需打出库单的方法进行调整,按照旧计划价打蓝字领用单(清空旧账页),再按照新计划价打红字领用单,通过“材料成本差异”科目进行过渡。先是按照蓝字领用单计划价金额,借记“材料成本差异”科目,贷记“原材料”科目(蓝字);再按照红字领用单计划价金额,借记“材料成本差异”科目,贷记“原材料”科目(红字)。调整结果类似于“方案二”。(2)如果企业因为管理上的需要,要将已存在计划价的总成件拆分成零散件并逐个制定计划价的,应保证拆分的零件计划价之和等于其总成件计划价之和。三、关于材料成本差异率的计算公式采用计划成本法的企业,应当在月份终了时计算材料成本差异率,据以分配当月形成的材料成本差异。材料成本差异率的计算公式如下:本月材料的成本差异率=(月初结存材料的材料成本差异+本月收入材料的材料成本差异)/(月初结存材料的计划成本+本月收入材料的计划成本)×100%四、验证财务原材料科目账面余额与材料成本差异余额正确性的诀窍。1、除特殊情况外,财务原材料科目本期增加数与物资管理部门入库金额是完全一致的。财务原材料科目本期增加数=本期验收单报账计划价金额-上期暂估验收单计划价金额+本期暂估验收单计划价金额=本期新验收单计划价金额2、除特殊情况外,分配材料成本差异后,期末材料成本差异余额=期末原材料科目余额×当期

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