How do I calculate my actual business travel expenses?
Let’s say you drove 15,000 business kilometres and 20,000 total kilometres this year, and your annual car insurance premium was $1,440. Divide the business kilometres driven (15,000) by the total miles driven (20,000), which gives you 75%, the percentage of miles used for business purposes.
Next, multiply the percentage (0.75) for each of your car expenses. For example, if your car insurance annual premium was $1,440, you can deduct 75% of that, or $1,080. If you spent $2,000 on gas, you’ll deduct $1,750 for business purposes.