Q: Can I deduct full year of CAA if I purchased items some point during the year?

A: Generally yes, but it is subject to a number of restrictions under different scenario. a little bit more complex than you simple question.

half year rule is applicable very often when you have a net increase in your UCC poll i.e. you total addition during the year into specific class of assets is more than you total disposal and there is asset remaining in that class at the end of taxation year.

for example. begining UCC $500 subject to 20% CCA rate; addition $400; disposal $200 - basis to calculate CCA for the year = $500+1/2x(400-200) = $600 multiplied by 20% is $120

Ending UCC = $500 +$400 - $200 -$120 = $580

But if it is net decrease, the full 12-mon of deprecation will be drawn on the balance after addition and disposal.

CCA is a concept base on taxation year. Therefore, should the taxation is less than 12 months, reg 1100(3) states that CCA must be prorated for the number of days in the taxation year (365)

For an individual with different fiscal year for business income from calendar year basis. depreciable property used to earn business income must be deprecated based on actual length of fiscal year included in certain taxation year. While for property income, reference must be made to the calendar year.

No CCA may be claimed in the year of death due to deemed disposition of assets immediately before death. Possibly, there is still recapture and terminal loss.

Here I omitted a number of exceptions, which might apply for individual case/scenario.