What changed and when
On March 12, 2026, Bill C-4, the Making Life More Affordable for Canadians Act, received Royal Assent. One of its core tax measures: the lowest federal marginal tax rate dropped from 15 % to 14 %, effective July 1, 2025. (canada.ca) Since this rate change came halfway through 2025, the full-year average rate for that year computes as 14.5 %. (canada.ca)
Impact on payroll and withholding
Employers began using updated source deduction tables starting July 1, 2025, to withhold tax at the new 14 % rate on the lowest bracket. Over the full year, income within that first bracket (for 2025) still averages to 14.5 % for filing purposes. (canada.ca)
Example
- If your taxable income in 2025 is $50,000, the portion up to $57,375 (first bracket) will be taxed at 14.5 % on your tax return, but withholding on pay-periods from July onward will be at 14 % for that portion. Before July, withholding was at 15 %. The rest of your income falls into higher brackets as usual.
Non-refundable tax credits (“credit rate”)
Most non-refundable credits’ value depends on the lowest marginal tax rate. With the drop to 14 %, their value also declines slightly. So if you claim credits like the basic personal amount, Canada employment amount, etc., the benefit per dollar of credit is now 14 %, instead of 15 %. In 2025, a prorated credit rate of 14.5 % applies. (canada.ca)
Planning opportunities and common pitfalls
Actions you could take now:
- Review whether making RRSP or TFSA contributions earlier in the year (before July) yields more benefit under the higher withholding period vs deferring.
- For individuals in two-income households, shifting income between spouses (where legal) can take advantage of lower withholding mid-year.
- If you receive other income streams like bonuses/payment in kind, consider their timing.
Watch out for:
- Incorrect withholding by employers: ensure your pay stub reflects the new rate post-July.
- Over-claiming credits at old rates—prepare to adjust in tax return if needed.
- Underestimating years when multiple brackets or deductions interplay—use a tax calculator or professional advice.
Bottom-line takeaways
- This tax cut gives nearly 22 million Canadians relief—up to $420 per individual in 2026, or $840 for two-income families. (canada.ca)
- If you earn most of your income in 2025, the practical benefit between July-December part might be less dramatic than a full-year rate of 14 %.
- Aligning your tax-planning decisions (RRSP, income timing, deductions) around this change can yield real savings.
NomadicTax Research Team hopes you’ll leverage this change smartly. Consult a tax professional for personalised planning.