Tax Planning
Maximizing Your Tax Relief: Understanding Canada’s New First Marginal Rate Cut
Canada is lowering the lowest federal personal income tax rate, bringing immediate relief and changing how non-refundable credits are calculated—here’s how to make the most of it.
By NomadicTax Research Team • 5-8 min read • March 8, 2026
## Key change and its timing
- Under **Bill C-4**, the federal government has proposed reducing the **first marginal personal income tax rate** from **15% to 14%** effective **July 1, 2025**.([canada.ca](https://www.canada.ca/en/department-finance/corporate/transparency/2025/briefing-binder-created-occasion-appearance-standing-committee-on-finance-october-6-2025.html?utm_source=openai))
- For 2025, since the change happens mid-year, the full-year “blended” rate will be **14.5%**, with 14% for the second half of the year. From **2026** onwards, the full **14% rate** applies.([canada.ca](https://www.canada.ca/en/department-finance/services/publications/federal-tax-expenditures/2026/part-2.html?utm_source=openai))
- The rate used for **most non-refundable tax credits** aligns with the first marginal rate, so those credits will also be calculated using the new lower rate starting July 2025.([canada.ca](https://www.canada.ca/en/department-finance/services/publications/federal-tax-expenditures/2026/part-2.html?utm_source=openai))
## Who benefits & measured impact
- **Nearly 22 million Canadians** will benefit, with savings up to **$420 per person** in 2026; two-income families may save up to **$840**.([canada.ca](https://www.canada.ca/en/department-finance/corporate/transparency/2025/briefing-binder-created-occasion-appearance-standing-committee-on-finance-october-6-2025.html?utm_source=openai))
- Benefits are most meaningful for those with taxable incomes in the **first** and **second brackets** (up to approximately $114,750).([budget.canada.ca](https://www.budget.canada.ca/2025/report-rapport/chap3-en.html?utm_source=openai))
- For individuals with **non-refundable tax credits** (e.g., disability, medical expenses), the **value of credits may “shrink” slightly** since the credit rate drops as well, but for most, the rate cut offsets this difference.([canada.ca](https://www.canada.ca/en/department-finance/corporate/transparency/2025/briefing-binder-created-occasion-appearance-standing-committee-on-finance-october-6-2025.html?utm_source=openai))
## Implications for tax planning
- Adjust withholdings: Payroll source deduction tables have been updated so that after July 1, 2025, the lower rate is used for payroll withholding.([canada.ca](https://www.canada.ca/en/department-finance/corporate/transparency/2025/briefing-binder-created-occasion-appearance-standing-committee-on-finance-october-6-2025.html?utm_source=openai))
- Re-evaluate deductions and credit-claim strategies: With a lower first rate, deductions or credits that fall into early brackets may yield different net benefit; analyze if it’s better to bunch expenses (e.g., medical) depending on your income level.
- For trust or corporation distributions: Individuals receiving trust income or dividends taxed at lower brackets may see slightly higher after-tax income; plan distributions or income timing accordingly.
## Practical example
Bob earns $50,000 in 2025. Before July 1, his earnings were taxed at 15%; after, at 14%. His 2025 return uses an average rate of 14.5%. Suppose he has a $2,000 medical expense credit which previously would be multiplied by 15%, now it's multiplied at 14%, reducing the credit value by \$20—but overall, Bob still saves more on his income tax due to the rate cut. If Bob is eligible for additional credits like the disability tax credit, review whether the credit-drop effect outweighs new savings.
## Actionable insights
- Review your **pay slips post-July 2025** to ensure source deductions reflect the lower rate.
- When using software or hiring tax preparation services for 2025 filings, ensure the correct rate and credit rate are used.
- If you expect to spread significant non-refundable credits, simulate both options (pre-July vs post-July) to determine optimal timing.
- Consult tax advisor if you are close to bracket thresholds, or if you receive significant non-refundable credits, to minimize unintended losses.
## Bottom line
This rate cut makes Canada’s tax system more affordable for millions. While the full-year benefit comes in 2026, the changes beginning in July 2025 already meaningfully shift the tax burden. Smart planning can help ensure you don’t lose out on associated credits.