For most small-business owners, tax season arrives once a year — and that's the problem. The businesses that consistently pay the least tax aren't the ones who scramble in March; they're the ones who plan through the year. As we move deeper into 2025, several planning opportunities deserve your attention now, while there's still time to act.
1. Revisit Your Salary vs. Dividend Mix
If you operate through a corporation, the split between owner salary and dividends is the single biggest lever you can pull. Salary generates RRSP contribution room and reduces corporate taxable income; dividends are simpler and may be taxed more favourably depending on your marginal rate. The right answer changes every year as your personal income, corporate profits and provincial rates shift. A 2025 review that accounts for the latest rate changes — particularly the small-business deduction limit and associated-company rules — is worth doing before your fiscal year closes.
2. Maximise the Small Business Deduction (SBD)
Canadian-controlled private corporations (CCPCs) pay a dramatically lower rate on active business income up to the SBD limit ($500,000 federally). Strategies to maximise it include deferring bonuses to split income across two fiscal years, avoiding "specified corporate income" traps if you provide services to other corporations, and monitoring whether passive income is grinding down your SBD access. If your passive income is approaching $50,000, a conversation about restructuring before year-end is overdue.
Key thresholds to monitor:
- SBD phase-out begins at $50,000 of passive investment income
- Full phase-out at $150,000 of passive income
- Associated-company income-sharing rules reduce the limit if you control multiple corporations
- Personal services business rules eliminate the SBD entirely — ensure your contracts are structured correctly
3. Capital Cost Allowance — Immediate Expensing
The federal immediate expensing incentive lets eligible businesses deduct up to $1.5 million of eligible depreciable property in the year of acquisition, rather than slowly over time. The 2025 budget extended and refined several elements of this — including interaction with the Accelerated Investment Incentive. If you're planning equipment purchases, vehicles, or leasehold improvements this year, timing and class selection matter enormously. Buying in December rather than January can shift a large deduction between two very different tax years.
4. Shareholder Loans — Manage Them Proactively
Loans from a corporation to a shareholder must generally be repaid within one year after the end of the corporation's fiscal year in which the loan was made — or be included in the shareholder's income. This rule catches more business owners than any other. If your corporation has advanced money to you, a family member, or an entity you control, now is the time to review the balance and either repay it, document it under a legitimate exception, or plan the income inclusion deliberately.
5. RRSP and Pension Planning Before Year-End
Salary paid from your corporation in 2025 creates RRSP room in 2026 — which means salary decisions made this year shape next year's tax-sheltering capacity. Beyond RRSPs, Individual Pension Plans (IPPs) are worth considering for business owners over 40 who have a history of T4 employment income; they allow significantly higher contributions than an RRSP and the corporation deducts the contributions.
A note on year-end timing
If your corporation has a non-December 31 fiscal year-end, you likely have more flexibility than calendar-year businesses to time deductions, bonuses, and dividends. Use that window deliberately. A quick planning meeting before your year-end closes can generate meaningfully better outcomes than a filing-time review.
6. HST/GST Housekeeping
Small-business owners often under-claim input tax credits (ITCs) through the year — particularly on home-office expenses, vehicle use, and mixed-purpose subscriptions. A mid-year ITC review often recovers meaningful amounts. Also confirm your HST registration threshold: if your revenue crossed $30,000 in any rolling four-quarter period and you haven't registered, the CRA can backdate penalties.
7. SR&ED — Don't Leave Research Credits on the Table
If your business is solving technical problems — developing new software features, improving a manufacturing process, testing new materials or formulations — some of that work is likely eligible for SR&ED credits. Qualifying expenditures generate a 35% refundable credit for CCPCs (up to $3M of qualified spending). The most common mistake is not tracking eligible work in real time. By year-end, the documentation window closes and much of the credit is lost.
The bottom line
Tax planning is not a single conversation — it's a rhythm. The businesses that pay the most tax are the ones who talk to their accountant once a year at filing time. If any of the strategies above apply to your situation, the time to act is now, not in April. A brief planning meeting can uncover opportunities that take minutes to implement but save thousands.