If you work from home, CRA may allow you to deduct a portion of your household expenses against your employment or self-employment income. For employees, the detailed method requires your employer to sign Form T2200 confirming you were required to work from home. You then calculate the percentage of your home used for work - typically by dividing your workspace area by the total home area - and apply that percentage to eligible expenses such as rent, utilities, home internet, and maintenance. For the self-employed, the rules are similar but broader. This calculator takes your home dimensions, workspace details, and each category of eligible expense and computes your maximum allowable deduction and the resulting tax savings in your province.