Income Tax Calculator - UK (2018/2019)
Calculate the amount of payable tax on a UK income for tax years 2018/2019.
Note: This library is still in the early stages of development and some functionality may be untested / undocumented.
Personal Allowance
Your personal allowance is the amount of income allowed before tax. The most common allowance is £11,850, so for an income of £75,000 only £63,150 would be taxable.
The allowance is calculated based on the amount of income before tax:
0 - £100,000
- £11,850£100,000 - £127,300
- £1 less than £11,850 every £2 above £100,000 until £0£100,000+
- £0
If you're registered blind you'll get an additional allowance of £2390.
Income Tax
Tax is calculated from your taxable income and is calculated at different rates for certain income brackets:
£0 - £11,850
- 0%£11,851 - £46,350
- 20%£46,351 - £150,000
- 40%more than £150,000
- 45%
So for an income of £75,000, £63,150 is taxable, you pay £6900 of tax at 20%, £11,460 at 40%, whilst nothing at 45% meaning tax payable is £18,360 so your net is £56,440.
Reference
IncomeTax
IncomeTax is a class which can be invoked to calculate different income tax factors.
Parameters:
income
(number) the amount of income before tax or deductionsopts
(object) optional parameters to adjust the calculationsisBlind
(boolean) incorporate blind person allowance?
Example
// import dependencyvar IncomeTax = ; // Initialise the IncomeTax objectvar incomeTax = 75000; // output the tax breakdown reportconsole; /*{ gross: 75000, taxable: 63150, net: 56640, allowance: 11850, tax20: 6900, tax40: 11460, tax45: 0, total: 18360}*/