UK Income Tax Calculator

A standalone UK tax calculator.

Usage options:

var TaxCalculator = require('uk-income-tax');
var persona = {
    age : 18,
    income : 50000,
    taxCode : '944L'
};
var tc = new TaxCalculator(persona);
tc.setTaxYear('2013_14');
tc.calculate();

Resulting in tc:

{
  income: 50000,
  deduction: 9822,
  taxFreeAllowance: 9440,
  persona: { age: 18, income: 50000 },
  taxYear: '2013_14',
  taxCodeCalculator: null,
  taxBand:
   { basic:
      { rate: 20,
        start: 0,
        end: 32010,
        amount: 32010,
        percentageAmount: 6402 },
     higher:
      { rate: 40,
        start: 32011,
        end: 150000,
        amount: 8550,
        percentageAmount: 3420 },
     additional:
      { rate: 45,
        start: 150001,
        end: null,
        amount: 0,
        percentageAmount: 0 } },
  taxableAmount: 40560,
  netAmount: 40178
}

You'll most likely be looking for netAmount.