This is a tool that calculates the total UK income tax and net income over a specified tax year, based on the gross income from earned, savings and dividend sources.

For these calculations, it is necessary to supply the following compulsory information:

• Your gross earned income in either monthly, weekly or annual terms.
• Your annual savings income, which, for flexibility, can either be entered as a net or gross interest amount. If your bank or building society has already deducted tax at the basic rate (20%) from your savings interest before you receive it, which should be indicated on your statement, you should enter your savings income as a net interest amount. Otherwise, you should enter it as a gross interest amount.
• Your annual dividend amount, which, for flexibility, can either be entered as the annual dividend received or the annual gross dividend income. If you enter the dividend received then, for calculation purposes, this is assumed to make up 90% of the gross dividend income, with the annual dividend tax credit making up the remaining 10%.
• The tax year, noting that this runs from 6 April in the first year to 5 April in the next.
• Your date of birth, in the default format (DD/MM/YYYY), unless you change the format in the menu. To reduce the time needed for data entry, a default date of birth is provided that can be used by most tax payers for calculating tax. Only if you are 65 or over during the tax year, and age related allowances come into consideration, is it essential to provide an accurate birth date.

If you qualify for any of the extra income tax allowances, i.e. additional to the personal allowance, then supply the relevant parts of the following information:

• If you qualify for the blind person's allowance, choose Yes in the drop down box.
• If you are entitled to the married couple's allowance, choose one of the options starting with Yes in the drop down box. If you were married, or became a civil partner, before the start of the tax year, then select Yes - Full to indicate that you are entitled to the full allowance. If you were married, or became a civil partner, during the tax year, you need to work out how many tax months of allowance you are entitled to, and select the appropriate option. To determine the entitlement, begin with the full 12 months and deduct a month for each complete tax month before the date of your marriage or civil partnership.
• The date of birth of your spouse, if your spouse is older, since this may affect your married couple's allowance.
• Note: The calculator assumes that only one member of an entitled couple gets the married couple's allowance. It does not allow for the specification of the transfer of part of the allowance to the other spouse or partner.

The data (e.g. rates and allowances) used by this tool was obtained primarily from...

http://www.hmrc.gov.uk/rates/it.htm

Associated tool link: http://www.coggit.com/tools/uk_income_tax_total.html