PayeCalculator

gistfile1.txt

class PayeCalculator {
  constructor(basicSalary, housingAllowance, transportAllowance, otherAllowance) {
    this.basicSalary = basicSalary;
    this.housingAllowance = housingAllowance;
    this.transportAllowance = transportAllowance;
    this.otherAllowance = otherAllowance;
  }

  calculatePension() {
    const grossIncome = this.basicSalary + this.housingAllowance + this.transportAllowance + this.otherAllowance;
    const pensionRate = 0.08;
    return pensionRate * grossIncome / 12;
  }

  calculateNHF() {
    const grossIncome = this.basicSalary + this.housingAllowance + this.transportAllowance + this.otherAllowance;
    const nhfRate = 0.025;
    return nhfRate * grossIncome / 12;
  }

  calculateCRA() {
    const grossIncome = this.basicSalary + this.housingAllowance + this.transportAllowance + this.otherAllowance;
    const annualCraBase = grossIncome - this.calculatePension() - this.calculateNHF();
    return Math.max(0.01 * annualCraBase + 0.2 * annualCraBase, 200000);
  }

  calculateTaxableIncome() {
    const annualCraBase = this.basicSalary + this.housingAllowance + this.transportAllowance + this.otherAllowance - this.calculatePension() - this.calculateNHF();
    return annualCraBase - this.calculateCRA();
  }

  calculateTax() {
    const taxableIncome = this.calculateTaxableIncome();
    let taxPayable = 0;
    if (taxableIncome <= 300000) {
      taxPayable = 0.07 * taxableIncome;
    } else if (taxableIncome <= 600000) {
      taxPayable = 21000 + 0.11 * (taxableIncome - 300000);
    } else {
      taxPayable = 54000 + 0.15 * (taxableIncome - 600000);
    }
    return taxPayable;
  }

  calculateNetSalary() {
    const grossIncome = this.basicSalary + this.housingAllowance + this.transportAllowance + this.otherAllowance;
    const monthlyGrossIncome = grossIncome / 12;
    const finalTaxPayable = Math.max(0.01 * grossIncome - this.calculatePension() - this.calculateNHF(), this.calculateTax());
    return monthlyGrossIncome - (finalTaxPayable / 12) - this.calculatePension() - this.calculateNHF();
  }
}

// Example Usage
const payeCalculator = new PayeCalculator(360000, 240000, 240000, 360000);
console.log("Pension Contribution: NGN", payeCalculator.calculatePension().toFixed(2));
console.log("NHF Contribution: NGN", payeCalculator.calculateNHF().toFixed(2));
console.log("CRA: NGN", payeCalculator.calculateCRA().toFixed(2));
console.log("Tax Payable: NGN", payeCalculator.calculateTax().toFixed(2));
console.log("Net Salary: NGN", payeCalculator.calculateNetSalary().toFixed(2));