The Canada Revenue Agency's July 1 edition of the T4127 Payroll Deductions Formulas guide is now in use by every employer and payroll provider outside Quebec, and for British Columbia it carries a change other provinces do not share. BC's withholding rate on the lowest bracket rises to 6.14% for the six months from July through December, a full percentage point above the 5.60% rate that actually applies to the bracket for the year.
The gap between 6.14% and 5.60% is not an error. It is the mechanism by which a retroactive provincial tax change gets collected without a separate reassessment.
Why the Rate Jumps to 6.14% Instead of 5.60%
British Columbia's 2025 budget, tabled February 17, 2026, raised the lowest personal income tax rate from 5.06% to 5.60% for the 2026 taxation year, applying to the first $50,363 of taxable income. The change took effect retroactively to January 1, but the CRA's January T4127 edition had already been finalized using the old 5.06% rate, since the BC budget had not yet been introduced.
The result was six months of underwithholding relative to the client's actual 2026 liability. The July T4127 edition corrects for this by applying a prorated rate of 6.14% to BC payroll income for the second half of the year, high enough that six months at 6.14% plus six months at 5.06% averages out to approximately the correct 5.60% annual liability. BC also raised its basic tax reduction from $562 to $690 for 2026 and increased the basic personal tax credit percentage from 5.06% to 5.60%, both of which partially offset the higher withholding for lower income employees.
Who Actually Feels This
Most BC employees will simply see a smaller paycheque starting with their first July pay run, with no action required. The people worth a proactive call are narrower. A BC client who changes employers or stops working before December may not accumulate the full six months of 6.14% withholding needed to true up the shortfall from earlier in the year, leaving a modest balance owing at filing that a client will not expect if no one has explained the mechanism.
Business owners who pay themselves a T4 salary from a BC corporation, a common strategy specifically to create RRSP contribution room rather than relying solely on dividends, are running the same payroll tables through their own corporate payroll and will see the identical mid-year adjustment on their own compensation. For a client near the edge of the first bracket threshold, the practical effect on annual take-home pay is small, roughly $270 across the full year on income at the $50,363 threshold, but the timing and the reason for it are worth explaining before a client asks why their July stub looks different from June's.
The Nine Other Provinces Did Not Move
British Columbia's lowest bracket rate now sits above only Nunavut and Ontario among all thirteen jurisdictions, a meaningful shift from its position among the lowest entry rates in the country as recently as June.
British Columbia's lowest bracket rate rose from 5.06% to 5.60% for the 2026 tax year under the province's 2025 budget. No other province or territory changed its lowest bracket rate mid-year.
For clients who split time or income between provinces, or who are weighing a move before year end, BC's rate change is now confirmed rather than proposed, and it belongs in any comparison an advisor runs against Ontario or Alberta. The full detail sits in the CRA's published payroll tables at hdq.ca and in the province's own budget documents, not in the withholding line on a pay stub alone.