If you use your laptop for business, you can deduct the expense. Rather than being a "usual" expense, laptops are considered to be capital costs. This simply means that instead of deducting the full cost, the expense is deducted over time - similar to your car.
Your expenses are classified as follows:
Cell phone - the cost of the phone itself is a capital cost (class 8). Monthly usage is an expense.
New computer - capital cost (class 50) If you purchased software such as Microsoft Office or Photoshop, also capital cost (class 12).
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