The working income tax benefit (WITB) consist of a basic amount and a disability supplement. This article is about how to calculate the working income tax benefit for single individuals without an eligible spouse or an eligible dependant for 2012.
How to calculate Basic WITB for 2012
The basic working income tax benefit (WITB) for single individuals is calculated at 25% of working income in excess of $3,000, reaching a maximum amount of $970 at $6,880 working income level. The basic WITB is reduced by 15% of adjusted family net income in excess of $11,011 and disappears when adjusted family net income reaches $17,478.
See the following article for different basic WITB amounts allowed at different income levels.
How much is basic working income tax benefit (WITB) for single individuals 2012
How to calculate disability supplement
If you are qualified for disability supplement, it is calculated at 25% of working income in excess of $1,150, reaching a maximum amount of $485 at $3,090 working income level. The disability supplement is reduced by 15% of adjusted family net income in excess of $17,478 and disappears when your adjusted family net income reaches $20,712.
See the following article for different disability supplement amounts at different income levels:
How much is working income tax benefit (WITB) disability supplement for single individuals 2012
The working income tax benefits are the total of basic WITB and disability supplement.
The above calculation is also applicable to individuals who were married or living in a common-law partnership, but didn’t have an eligible spouse or an eligible dependant.