Benefit calculation method in Canada 2026: formulas, sources

Every amount on this site comes from one parameter file, read on October 10, 2026 from the official pages listed at the bottom, each with its own modification date. Calculators and text read that file: no amount is typed into a page by hand, and a corrected value changes everywhere at once.

Three update clocks

CRA benefits (Canada child benefit, Groceries and Essentials Benefit, provincial programs) run on a July-to-June year calculated from the previous year’s return: the site applies July 2026 to June 2027, on 2025 income. CPP is indexed every January 1 (2.0 % in 2026). OAS, GIS and the Allowance are reviewed every quarter: the site applies the October to December 2026 quarter published by ESDC. The workers benefit follows the 2026 tax year.

Canada child benefit

Maximum of $8,157 per child under 6 and $6,883 from 6 to 17. Below $38,237 of adjusted family net income, no reduction. From $38,237 to $82,847, a reduction of 7.0 %, 13.5 %, 19.0 % or 23.0 % of the excess for 1, 2, 3, or 4 and more children. Above $82,847, a fixed amount ($3,123, $6,022, $8,476, $10,260) plus 3.2 %, 5.7 %, 8.0 % or 9.5 %. Child disability benefit: $3,480 per child, reduced by 3.2 % (one child) or 5.7 % (two or more) above $82,847. Example: two children, one under 6, $60,000 of income: $12,102 a year.

Canada Groceries and Essentials Benefit (former GST/HST credit)

$445 for the applicant, $445 for a spouse or the first child of a single parent, $234 for each other child under 19. Single supplement of up to $234: 2 % of income above $11,564 for a single person with no children, in full for a single parent. The total is reduced by 5 % of adjusted family net income above $46,432. The engine reproduces the CRA payment chart to the cent.

Canada workers benefit

27 % of working income above $3,000, capped at $1,665 (single) or $2,869 (family), minus 15 % of adjusted net income above $27,392 or $31,251. For a couple, the lower of the two working incomes is exempt up to $16,714. Disability supplement: 27 % of the person’s working income above $1,150, capped at $860, reduced by 15 % (or 7.5 % if both spouses qualify) above $38,495 or $50,377. Quebec, Alberta and Nunavut use their own parameters, which the site does not model.

CPP, OAS and the recovery tax

CPP pension: the age-65 amount from your statement, capped at $1,507.65, reduced by 0.6 % per month before 65 or increased by 0.7 % per month after, up to 70. OAS: $762.50 a month from 65 to 74 and $838.75 at 75 and over, times years of residence after 18 divided by 40, plus 0.6 % per month of deferral (at most 36 %). Recovery tax: 15 % of net income above $93,454 (2025 income), capped at the pension itself. Service Canada publishes a zero point of $152,062 based on a reference annual pension; with the October to December 2026 amount, about thirty dollars remain at that income.

Guaranteed Income Supplement and Allowance: a fitted model

Canada.ca publishes, each quarter, the maximum and the income threshold for each situation, and the income at which the top-up ends, but not the full rate table. The engine rebuilds the Old Age Security Act calculation: a basic part reduced by $1 for every $2 of monthly income (single) or $1 for every $4 of combined monthly income (couple), a top-up reduced above $2,000 ($4,000 for a couple), then fits each part so it lands exactly on the published maximum, top-up threshold and income threshold. The Allowance adds an OAS-equivalent part reduced by $3 for every $4 of monthly income. Employment income is exempt up to $5,000, then by half up to $15,000. Between two thresholds, the gap with the official table can reach about a dollar a month because of income-bracket rounding. Example: single person, $10,000 of income excluding OAS: $556.67 a month.

Provincial programs

Calculated in full where the rule is published: the Ontario Trillium Benefit (energy and property tax credit, sales tax credit, northern energy credit), the BC family benefit, the New Brunswick HST credit and the Nova Scotia affordable living tax credit. Where a province publishes only a maximum and a threshold (Ontario Child Benefit, Quebec family allowance, Alberta child and family benefit, Saskatchewan credit, Atlantic and territorial child benefits), the site shows the maximum, flags it with an asterisk and leaves it out of the total.

Tests that block a release

Groceries and Essentials Benefit: seventeen rows of the CRA payment chart (single, couple, single parent, couple with two children), to the cent.
Child benefit: the fixed amounts of the second band found within $1, the child disability benefit and the one-time payment under $240.
Workers benefit: published zero points ($38,492 and $50,378), secondary earner exemption, capped supplement.
OAS deferred to 70: $1,037.00 a month, Service Canada’s own example; GIS and Allowance exact at the maximum and at each published threshold.
Maximum 2026 CPP contributions ($4,230.45 and $416 for CPP2) and the RRIF factors of section 7308.
Every small calculator, in both languages, with no missing value.

What the site does not do

It replaces neither the CRA’s notice nor Service Canada’s decision, which see your full file (shared custody, change of marital status, late return).
It does not cover Employment Insurance, provincial social assistance or veterans’ benefits.
The home calculator assumes a full OAS pension and counts CPP inside the income you enter.

Updates

Reviewed in July, at each OAS quarter, in January for CPP, and at least every 12 months. An error reported to contact@mycanadabenefits.com is checked against the source, fixed, then turned into a test. See the editorial policy.

All sources

Last checked: October 10, 2026.