Running a business in Canada drains your time, focus, and money. You track sales, pay staff, and try to keep the lights on. You likely miss legal tax breaks that could put real cash back in your pocket. This blog looks at seven quiet write offs that many owners skip. These are not tricks. They are legal rules that reward careful records and smart planning. You will see how small costs from home use, training, travel, and support work can cut your tax bill. You will also see how to use them without trouble from the CRA. The goal is simple. You keep more of what you earn by maximizing deductions and credits. Each point includes clear steps you can follow before your next tax filing so you stop leaving money on the table.
1. Home office costs you forget to claim
If you run your business from home, you can claim a share of costs. Many owners only claim internet or a small phone bill. You can often claim more.
- Heat and electricity
- Rent or mortgage interest
- Property tax
- Home insurance
- Maintenance that links to your work space
You must use a fair method to split personal and business use. You can use square feet or number of rooms. You must also use the space as your main business place or use it to meet clients on a regular basis.
Sample home office cost split
| Item | Total yearly cost | Business use share | Claim amount
|
|---|---|---|---|
| Rent | $24,000 | 15% | $3,600 |
| Utilities | $3,000 | 15% | $450 |
| Home insurance | $1,200 | 15% | $180 |
You can read the Canada Revenue Agency guide on work space in the home rules at Canada.ca business income guide.
2. Family help and support work
Many owners lean on family. A spouse sends invoices. A teen packs orders. You may not pay them through payroll, so you miss a deduction.
You can pay a family member for real work at a fair rate. Then you can claim the wage as an expense. The family member reports the income. This can lower the family tax bill if they are in a lower bracket.
- Put a job description in writing
- Set an hourly rate that matches market pay
- Keep time sheets and proof of payment
This approach shows respect for their work and keeps records clear if the CRA asks questions.
3. Training, courses, and self education
You need new skills to keep your business alive. Many owners pay for courses and forget to claim them. You can often deduct fees for learning that links to your current business.
- Online courses on marketing or coding
- Workshops on bookkeeping
- Industry conferences
- Trade group fees
Keep invoices, course outlines, and proof you paid. You cannot claim personal courses that do not connect to your business. You also cannot claim tuition tax credits inside your business return, but the business can deduct training that supports current income.
4. Small tools, software, and app costs
Many tools now sit in your phone or laptop. You sign up once and forget the cost. These small charges add up across a year.
- Project management apps
- Design or photo tools
- Cloud storage
- Online booking tools
You can claim the share used for business. If an app is used for both work and home, pick a fair split and apply it the same way each year. Print your yearly subscription summaries so you do not lose proof if you change providers.
5. Business use of your car
You may know you can claim fuel. Many owners stop there. You can claim many more costs as long as you track business use.
- Fuel
- Insurance
- Repairs and tires
- Lease payments or a share of capital cost allowance
- Parking fees for business trips
You must keep a log of business trips. Record date, destination, purpose, and kilometers. Then you can apply the business share to total car costs. You can see CRA rules on motor vehicle expenses at the CRA motor vehicle expenses page.
6. Health and insurance costs for owners
As an owner, you often pay out of pocket for health coverage. Some plans and premiums can be deducted by the business if set up under a proper plan.
- Private health services plan premiums
- Certain group benefits for staff that include you
You need a clear written plan and regular premium payments. You also need to treat staff and owners in a fair way. When done right, this shifts after tax spending into a business cost and reduces your tax load.
7. Bad debts and unpaid invoices
Not every client pays. You feel the sting and then move on. You may forget you can claim some of these unpaid amounts as a bad debt expense.
You must show that:
- The sale was recorded as income
- You took real steps to collect
- The debt is now uncollectible
Keep emails, letters, and notes of calls. Once you write the amount off, you claim it as an expense. If you later collect it, you add it back as income in that year. This keeps your numbers honest and fair.
Quick comparison of common missed deductions
Common missed deductions and simple checks
| Deduction | Typical sign you miss it | Simple yearly check
|
|---|---|---|
| Home office | You work from home but only claim internet | Review rent, utilities, and tax bills for a fair share |
| Family wages | Family helps but no T4s or pay records | List family tasks and set fair pay with records |
| Training | You pay for courses on a personal card | Gather all course receipts and flag those linked to work |
| Apps and software | Many small monthly charges on your card | Print yearly statements and mark each as business or personal |
| Car costs | You only claim fuel and no logbook | Start a log and total all car costs once a year |
| Owner health costs | You pay for health coverage from personal funds | Ask your advisor about a private health services plan |
| Bad debts | Old unpaid invoices stay on your books | Review aged receivables and mark those you cannot collect |
How to protect yourself with records
The CRA looks for proof. You protect yourself by keeping clear records for six years. You should store:
- Invoices and receipts
- Bank and credit card statements
- Contracts and written plans
- Logs for car use and home office splits
Use simple folders or basic software. You do not need complex tools. You only need a clear story that shows what you spent and why it links to your business.
Next steps before your next tax filing
- Pick three of the seven deductions that apply to you
- Gather proof for the last year and note missing records
- Set up simple habits like a car log or monthly receipt scan
You work hard for your income. These quiet steps help you keep more of it and give your family more safety and choice.