个人所得税 js 计算代码

/** * beginMoney 征收起点 * handMoeny 税后工资 */ function deCalcPersonalTax(beginMoney,handMoney){ var critical = [0,500,2000,5000,20000,40000,60000,80000,100000]; var taxRates = [0.05,0.10,0.15,0.20,0.25,0.30,0.35,0.40,0.45]; var quickCalcNumbers = [0,25,125,375,1375,3375,6375,10375,15375]; var moneyRange = new Array(); for(var i = 0,j = critical.length;i < j;i++){ moneyRange.push(beginMoney + critical[i] - quickCalcNumbers[i]); } var index = 0; for(var i = 0,j = moneyRange.length;i handMoney){ index = i - 1; break; } } var taxRate; var quickCalcNumber; if(index < 0){ taxRate = 0; quickCalcNumber = 0; }else{ taxRate = taxRates[index]; quickCalcNumber = quickCalcNumbers[index]; } var totalMoney = (handMoney - beginMoney * taxRate - quickCalcNumber) / (1 - taxRate); var tax = totalMoney - handMoney; return { "totalMoney" : totalMoney, "tax" : tax } }