今天心血来潮,编写了一个个人所得税计算器,呵呵,虽然功能不是很强,而且也是重复造轮子(网上也有许多的个人所得税计算器),不过“纸上得来总觉浅,绝知此事要躬行”,自己动动手绝对有好处的。
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下面是个人所得税计算的类:
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namespace SalaryComputer
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{
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public class PersonalIncomeTax
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{
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字段/属性#region 字段/属性
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/**//// <summary>
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/// 税率
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/// </summary>
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private double[] taxRate =
{ 0, 0.05, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45 };
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/**//// <summary>
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/// 税率(税率最好保存在数据库表里或xml文件,当国家出台新的个人所得税政策法规时,不需要修改代码部分)
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/// </summary>
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public double[] TaxRate
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{
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get
{ return taxRate; }
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set
{ taxRate = value; }
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}
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/**//// <summary>
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/// 速算扣除数
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/// </summary>
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private double[] subtractNumber =
{ 0, 0, 25, 125, 375, 1375, 3375, 6375, 10375, 15375 };
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/**//// <summary>
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/// 速算扣除数
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/// </summary>
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public double[] SubtractNumber
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{
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get
{ return subtractNumber; }
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set
{ subtractNumber = value; }
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}
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/**//// <summary>
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/// 超过起征税的数额
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/// </summary>
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private double[] surpassAmount =
{ 0, 500, 2000, 5000, 20000, 40000, 60000, 80000, 100000 };
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/**//// <summary>
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/// 超过起征税的数额
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/// </summary>
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public double[] SurpassAmount
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{
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get
{ return surpassAmount; }
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set
{ surpassAmount = value; }
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}
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/**//// <summary>
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/// 征税起点工资
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/// </summary>
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private double startTaxSalary;
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/**//// <summary>
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/// 征税起点工资
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/// </summary>
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public double StartTaxSalary
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{
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get
{ return startTaxSalary; }
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set
{ startTaxSalary = value; }
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}
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#endregion
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构造函数#region 构造函数
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/**//// <summary>
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/// 无参构造函数
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/// </summary>
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public PersonalIncomeTax()
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{
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StartTaxSalary = 2000;
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}
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/**//// <summary>
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/// 征税基本工资有时会随国家政策,法律变更
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/// </summary>
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/// <param name="baseSalary">征税基本工资</param>
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public PersonalIncomeTax(double taxSalary)
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{
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StartTaxSalary = taxSalary;
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}
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#endregion
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自定义方法#region 自定义方法
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/**//// <summary>
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/// 计算个人所得税,返回应缴税收,征税后所得薪水
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/// </summary>
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/// <param name="Salary">薪水</param>
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/// <param name="Welfare">五险一金数额</param>
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/// <param name="IsChinaNationality">是否是中国国籍</param>
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/// <param name="taxedSalary">税后所得实际工作</param>
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/// <returns>返回个人所得税</returns>
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public double CalculatePersonTax(double Salary, double Welfare, bool IsChinaNationality, out double taxedSalary)
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{
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double RateSalary = 0;
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RateSalary = Salary - StartTaxSalary - Welfare;
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if (!IsChinaNationality)
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{
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RateSalary = RateSalary - 3000;
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}
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int rateIndex = 0;
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if (RateSalary >= 0)
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{
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for (int index = 0; index < SurpassAmount.Length; index++)
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{
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if (RateSalary >= SurpassAmount[index] && RateSalary <= SurpassAmount[index + 1])
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{
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rateIndex = index + 1;
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break;
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}
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}
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}
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double rate = RateSalary * TaxRate[rateIndex] - SubtractNumber[rateIndex];
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taxedSalary = Salary - Welfare - rate;
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return rate;
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}
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#endregion
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}
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}
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