019年1月1日即将到来，码农们除了关心自己的技能之外，还有薪资是不是可以多拿点。 每次算的时候 都要百度一下个人所得税，但是很多都是老的税率计算，找一个新的出来还是比较麻烦，所以个人开发了一个最新税率的小程序。解决和我有着一样痛苦的码农们的问题。

根据最新税改后计算个人所得税的计算器。目前支持南京，后续开放 杭州 上海 北京等城市。 如果有疑问的可以加最下方 开发者微信。

• 首先在微信官网下载微信小程序开发工具 https://mp.weixin.qq.com
• 在https://mp.weixin.qq.com 注册小程序账号，完成个人实名认证。
• 在小程序后台拿到appid，下面就可以开发了。

实例查看二维码：

先使用weui 小程序ui框架就行页面布局

<button block type="dark" bindtap='calculationBindtap'>计算</button>

其次写JS代码（计算按钮逻辑代码）

import data from './data'  const app = getApp;  Page({     data: {         options1: data,         value: '1',         checked: true,         standard: 1,         marking: 5000,         beforetaxCount: 0,         specialitemCount: 0     },           calculationBindtap:function(){         // 开始计算  计算完成把计算结果放在result对象中         var beforetaxCount = this.data.beforetaxCount;         var specialitemCount = this.data.specialitemCount;         var marking = this.data.marking;         if (beforetaxCount == null || beforetaxCount == 0 || beforetaxCount == ''){             wx.showToast({                 title: '输入正确薪资',                 mask: true,                 icon: 'loading'             })             return;         }         if (specialitemCount == null || specialitemCount == ''){             specialitemCount = 0;         }         // 开始计算          var oldNum = 0.08;         var medNum = 0.02;         var unemNum = 0.005;         var workNum = 0;         var giveNum = 0;          var providentfundNum = 0.08;          var insuranceBase = 19935;         var providentfundBase = 25300;          var oldcount = 0;         var medcount = 0;         var unemcount = 0;         var workcount = 0;         var givecount = 0;          var providentfundcount = 0;          var privateFee = 0;         var plusFee = 0;          if(this.data.checked){             if (parseFloat(beforetaxCount) > parseFloat(insuranceBase)) {                 oldcount = parseFloat(insuranceBase) * parseFloat(oldNum);                 medcount = parseFloat(insuranceBase) * parseFloat(medNum);                 unemcount = parseFloat(insuranceBase) * parseFloat(unemNum);                 workcount = parseFloat(insuranceBase) * parseFloat(workNum);                 givecount = parseFloat(insuranceBase) * parseFloat(giveNum);             } else {                 oldcount = parseFloat(beforetaxCount) * parseFloat(oldNum);                 medcount = parseFloat(beforetaxCount) * parseFloat(medNum);                 unemcount = parseFloat(beforetaxCount) * parseFloat(unemNum);                 workcount = parseFloat(beforetaxCount) * parseFloat(workNum);                 givecount = parseFloat(beforetaxCount) * parseFloat(giveNum);             }              if (parseFloat(beforetaxCount) > parseFloat(providentfundBase)) {                 providentfundcount = parseFloat(providentfundBase) * parseFloat(providentfundNum);             } else {                 providentfundcount = parseFloat(beforetaxCount) * parseFloat(providentfundNum);             }         }          // 保险总费用         var totalInsuranceFee = parseFloat(oldcount) + parseFloat(medcount) + parseFloat(unemcount) + parseFloat(workcount) + parseFloat(givecount);         // 公积金费用          var totalProvidentfundFee = providentfundcount;          // 下面的钱 交税         console.log(this.data.marking);         var otherFee = parseFloat(beforetaxCount) - parseFloat(totalInsuranceFee) - parseFloat(totalProvidentfundFee) - parseFloat(this.data.marking) - parseFloat(specialitemCount);                  if (parseFloat(otherFee) <= 3000 && parseFloat(otherFee) > 0) {             privateFee = parseFloat(otherFee) * 0.03;             plusFee = 0;         }         if (parseFloat(otherFee) <= 12000 && parseFloat(otherFee) > 3000) {             privateFee = parseFloat(otherFee) * 0.1;             plusFee = 210;         }         if (parseFloat(otherFee) <= 25000 && parseFloat(otherFee) > 12000) {             privateFee = parseFloat(otherFee) * 0.2;             plusFee = 1410;         }         if (parseFloat(otherFee) <= 35000 && parseFloat(otherFee) > 25000) {             privateFee = parseFloat(otherFee) * 0.25;             plusFee = 2660;         }         if (parseFloat(otherFee) <= 55000 && parseFloat(otherFee) > 35000) {             privateFee = parseFloat(otherFee) * 0.3;             plusFee = 4410;         }         if (parseFloat(otherFee) <= 80000 && parseFloat(otherFee) > 55000) {             privateFee = parseFloat(otherFee) * 0.35;             plusFee = 7160;         }         if ( parseFloat(otherFee) > 80000) {             privateFee = parseFloat(otherFee) * 0.45;             plusFee = 15160;         }          var result = {};                  result.insuranceCount = totalInsuranceFee;         result.providentfundCount = totalProvidentfundFee;         result.providentfundNum = parseFloat(providentfundNum) * 100;         result.money = parseFloat(beforetaxCount) - parseFloat(totalInsuranceFee) - parseFloat(totalProvidentfundFee) - parseFloat(privateFee) + parseFloat(plusFee);         result.privateFee = privateFee - parseFloat(plusFee);         result.specialitemCount = specialitemCount;         result.oldNum = parseFloat(oldNum) * 100;         result.medNum = parseFloat(medNum) * 100;         result.unemNum = parseFloat(unemNum) * 100;         result.workNum = parseFloat(workNum) * 100;         result.giveNum = parseFloat(giveNum) * 100;          result.oldcount = parseFloat(oldcount);         result.medcount = parseFloat(medcount);         result.unemcount = parseFloat(unemcount);         result.workcount = parseFloat(workcount);         result.givecount = parseFloat(givecount);          wx.setStorage({             key: 'result',             data: result,             success:function(){                 wx.navigateTo({                     url: '../calculation/calculationResult',                 })             }         })              },  })

把计算好的结果放在result对象中 通过wx.setStorage 放在缓存中，传到下一个页面。最后展示出来。