Say I bought something in year 1 for $30 000 and then in year 3, I buy something else for $20 000, with a CCA rate of 30% for all items. What would the base and remaining undepreciated captial cost be for year 4?

So, first, to get to year 3, I need to apply the CCA rate for two years on the first item.

Year 1:

Base UCC = 30 000

CCA = 30 000 * 0.5 (half year rule) * 30% = 4500

Remaining UCC = 30 000 - 4500 = 25 500

Year 2:

Base UCC = 25 500 (from previous year)

CCA = 25 500 * 30% = 7650

Remaining UCC = 25 500 - 7650 = 17 850

Now, this where I start to feel less confident.

Year 3:

Base UCC would be previous year's remaining UCC plus the price of the second item? So that would be 17 850 + 20 000 = 37 850

But then the CCA has the half-year rule on one thing and not on the other. Separate calculation for each item?

17 850 * 30% + 20 000 * 0.5 * 30% = 8355

Remaining UCC = 37 850 - 8355 = 29 495

And then year 4 I can just take the remaining UCC from year 3 and apply CCA as if there were only one thing.

Is my understanding of the calculations in year 3 correct?