Overview
- Alberta has the lowest provincial tax rates in Canada, with a new 8% bottom bracket (2025) and no PST. This means Alberta residents keep more of their income, producing higher NDI at the same gross salary.
- The Alberta Child and Family Benefit provides up to $1,499/year for the first child plus a working income supplement. Full benefit below $27,565 AFNI; phases out entirely by $68,723.
- Higher NDI in Alberta can produce different spousal support outcomes than the same incomes in higher-tax provinces. The SSAG formulas account for this automatically through the full tax calculation.
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Alberta has historically been Canada's lowest-tax province, and that remains true in 2025. The combination of the lowest provincial income tax rates, no provincial sales tax, and a relatively generous child benefit means that Alberta residents retain more disposable income than residents of any other province at the same gross salary. This directly affects support calculations — both child support (through the provincial table calibration) and spousal support (through the NDI waterfall).
Alberta Tax Brackets (2025)
Alberta had a flat 10% income tax rate from 2001 to 2014. Progressive brackets were introduced in October 2015 and expanded over subsequent years. In 2025, a new 8% bottom bracket was added for the first $60,000 of taxable income:
8%
First $60,000
10%
$60,000 – $151,234
12%
$151,234 – $181,481
13%
$181,481 – $241,974
14%
$241,974 – $362,961
15%
$362,961+
For comparison, Ontario's top rate is 13.16% (plus surtax, effective ~20%), BC's top rate is 20.5%, and Quebec's top rate is 25.75%. At $100,000 of taxable income, an Alberta resident pays roughly $8,000 in provincial tax versus $5,100 in Ontario (before surtax) — but Ontario's surtax, Health Premium, and higher bracket rates above $105,000 quickly reverse the advantage for higher earners.
NO PST
Alberta is the only province with no provincial sales tax of any kind — no PST, no HST beyond the federal 5% GST. While PST does not directly enter the child or spousal support calculation (which operates on income, not consumption), it affects real household spending power and is part of the broader cost-of-living context.
Dvorce.ca calculates the real after-tax picture for both parties
try it freeAlberta Child and Family Benefit (ACFB)
The ACFB has two components: a base benefit and a working income supplement.
The ACFB is administered by the CRA and paid quarterly with the CCB. For a lower-income parent with two children, the combined base and working supplement can add over $2,000 per year to their NDI.
Sources & Further Reading (3)
This article is for general information only and does not constitute legal, financial, or tax advice. Family law matters vary by jurisdiction and individual circumstances. Consult a qualified family law lawyer or tax professional licensed in your province for advice specific to your situation.
Related Reading
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