7 Legitimate Ways to Reduce Your Corporate Tax Bill in Ontario
Most small business owners in Ontario don't pay too much corporate tax because the rates are unfair — they pay too much because their accountant treats year-end as a bookkeeping exercise instead of a planning one. The strategies below are all legitimate, well-established, and used by every CPA who actually advises (rather than just files). They work best when you start before year-end, not after.
1. Maximize the Small Business Deduction
Canadian-Controlled Private Corporations (CCPCs) pay roughly 12.2% on the first $500,000 of active business income in Ontario, vs. about 26.5% above that threshold. If your associated corporations or passive income are eroding the SBD, restructuring can recover hundreds of thousands in tax over time.
2. Pay a Reasonable Salary to Family Members Who Actually Work
If your spouse handles bookkeeping or your child works the front desk, paying them a market-rate salary shifts income from your top bracket to their lower one — provided the work is real and documented. Be careful: TOSI rules disallow split income unless the recipient is meaningfully engaged in the business.
3. Time Bonuses and Dividends Strategically
Bonuses are deductible to the corporation but taxable to you personally. Dividends aren't deductible but are taxed at lower personal rates. The right mix depends on your overall income, RRSP room, and CPP contribution goals — and it changes year to year.
4. Lifetime Capital Gains Exemption (LCGE) Planning
If you sell qualifying small business corporation shares, you can shield up to $1,016,836 (2024) of capital gains from tax. But the company must meet specific tests — at least 90% of assets used in active business at sale, and 50% throughout the previous 24 months. Multi-year planning is essential.
5. Buy Equipment Before Year-End for Accelerated Depreciation
The Accelerated Investment Incentive lets you deduct a larger portion of capital purchases in year one. If you were going to buy a vehicle, computers, or equipment in Q1 anyway, accelerating to December can move thousands of dollars of tax savings forward by 12+ months.
6. Use a Holding Company to Defer Personal Tax
Excess profits paid as dividends to a holding company can grow tax-deferred in passive investments. Combined with creditor protection and estate planning benefits, hold-cos are a quiet workhorse of Ontario small business tax planning.
7. Don't Forget HST and Payroll Audits
The CRA conducts more HST and payroll audits than corporate tax audits — and the assessments are often larger. Reviewing input tax credits, taxable benefit calculations, and contractor-vs-employee classifications before the CRA does protects savings you've already earned.