Tax Planning
Optimizing Personal Income Tax: How the New Lowest Marginal Rate Affects You and Your Credits
Canada’s recent drop of the lowest federal rate to 14% changes how non-refundable tax credits are valued—this article shows you who benefits, how it affects your tax bills, and what planning moves make sense.
By NomadicTax Research Team • 5-8 min read • August 13, 2026
## What Changed in the Personal Income Tax Rates
Bill C-4 (“Making Life More Affordable for Canadians Act”) reduced Canada’s lowest marginal personal income tax rate from **15% to 14.5% in 2025**, then to **14% starting July 1, 2025**. For 2026 and future tax years, 14% applies to taxable income up to the first bracket threshold. ([canada.ca](https://www.canada.ca/en/department-finance/services/publications/report-impact-reducing-lowest-marginal-personal-income-tax-rate-non-refundable-tax-credits.html?utm_source=openai))
## How Non-Refundable Tax Credits Are Affected
Non-refundable credits (e.g., Basic Personal Amount, Canada Employment Credit, Medical Expense, Disability Credit) are multiplied by the **lowest tax rate** to determine their value. Lowering this rate **scales down the dollar value** of those credits. For example, a credit worth \$1,000 would reduce tax by \$140 in 2026 instead of \$150 under the old 15% rate. ([canada.ca](https://www.canada.ca/en/department-finance/services/publications/report-impact-reducing-lowest-marginal-personal-income-tax-rate-non-refundable-tax-credits.html?utm_source=openai))
## Who Gains or Loses—and Why
**Gainers**:
- Taxpayers in low to middle income brackets: pay less federal tax on each dollar in the lowest bracket.
- Individuals claiming fewer non-refundable credits: they benefit more from rate cut than are impacted by lower credit value.
**Potential downside**:
- Those with large non-refundable credits: they may see smaller deductions in tax savings because the credits are worth less.
## Planning Moves You Can Consider
- **Accelerate income or deductions** into years with higher rates if that makes sense for your bracket.
- Review your expected non-refundable credits to project any drop in value and weigh against rate benefits.
- Consider RRSP contributions—since they reduce taxable income in high marginal brackets, whose savings are unaffected by lower rate in first bracket.
- Charitable giving timing: if you make a major donation, combining donations in a year with higher rates might yield bigger benefit.
## Simple Numeric Examples
- **Scenario A**: Jane has \$50,000 taxable income and claims \$1,000 in non-refundable credits. Under 15% rate, she’d save \$150 via the credit; under 14%, \$140—a \$10 difference—but she also pays lower rate on her first bracket income, yielding savings.
- **Scenario B**: Mark uses many credits (medical, caregiver, volunteer) totalling \$5,000. The drop in value across all those credits could be \$50 under the new rate. But his overall federal tax savings may still be positive given the lowered bracket rate.
## What You Should Do Now
- Update your tax-projections for 2025 and 2026 with the lower lowest rate.
- When estimating refunds or taxes payable, expect non-refundable credit values to decrease by about 6-7% relative to previous values (from 15% to 14%)—adjust budgeting.
- If entering into major expenses or investments that produce credits, check whether waiting or prepaying makes sense.
- Ensure your payroll and withholding (if paid by employer) reflects changed rates so errors or surprises at filing are minimized.
## Long-Term Implications
Over time, adjustments may be required in legislation to rebalance revenue from credit-rich provisions. Some credits may be revised by Parliament. Stay current, especially if you rely on credits like Medical Expense, Volunteer Firefighter, Disability.
**Bottom line**: Lowering the lowest tax rate benefits nearly all Canadians by reducing tax payable in the first bracket—but changes to credit valuation mean planning, especially around deductions, has a fresh twist. Understand the trade-off to make sure your annual tax strategy maximizes what you keep, not just what you pay.