How much home-office expense should I claim?
According to CRA, to calculate the portion you can deduct, use a reasonable basis such as the area of the work space divided by the total area of your home. If you use part of your home for both your business and personal living, calculate how many hours in the day you use the rooms for your business, and then divide that amount by 24 hours. Multiply the result by the business part of your total home expenses. This will give you the household cost you can deduct. If you run the business for only part of the week or year, reduce your claim accordingly. (http://www.cra-arc.gc.ca/tx/bsnss/tpcs/slprtnr/rprtng/t2125/ln9945-eng.html)
Can I claim my phone expense 100%?
Yes, if you have a second phone for personal use. If you only own one phone, then claiming 100% is not advisable.
Can I claim auto expenses without a mileage log?
Ideally, all auto expenses must be based on your mileage log. You should have a detailed documentation of all your business-related driving. If not possible, a reasonable estimate is allowed by accountants. However, should you be audited, there's a higher chance your claims may be denied.
If I took a business trip and paid using my Air Miles, can I still write it off?
This is something you should discuss with your professional accountant. In my experience, accountants have allowed their clients to claim the fair market value of the ticket purchased with the Air Miles. Documentation showing the fair market value of the ticket at the time of purchase is necessary to make the claim.
How often should I have my books assessed?
At the very least quarterly, if monthly is not doable. Waiting for year-end does not necessarily save you money. It only deprives you of making timely decisions about your business. Regular bookkeeping and understanding of your financial statements must be completed regularly and consistently to ensure you are on track with your goals and budget.