Tax year. Every figure on this page is for the 2026 tax year. No 2025 figure is used.
Federal credit. The federal disability amount for 2026 is $10,341. At the lowest federal rate of 14%, that is worth $1,448 in federal tax reduction. The supplement for a person under 18 is up to $6,032, worth up to $844 at 14%, for a combined federal maximum of $16,373 in amounts and $2,292 in tax reduction. The supplement is reduced dollar-for-dollar by attendant care or child care expenses claimed for the child above $3,533; this calculator shows the full supplement and says so plainly.
Provincial credit. Each province multiplies its own disability amount by its lowest tax rate. The 2026 provincial disability amounts and lowest rates used here are: Alberta $17,563 at 8% ($1,405; child supplement $13,180, worth $2,459); British Columbia $9,913 at 5.6% ($555; child supplement $5,783, worth $879); Manitoba $6,180 at 10.8% ($667; child supplement $3,605, worth $1,057); New Brunswick $10,210 at 9.4% ($960; child supplement $5,955, worth $1,520); Newfoundland and Labrador $7,549 at 8.7% ($657; child supplement $3,553, worth $966); Nova Scotia $7,341 at 8.79% ($645; child supplement $3,449, worth $948); Ontario $10,494 at 5.05% ($530; child supplement $6,121, worth $839); Prince Edward Island $6,890 at 9.5% ($655; child supplement $4,019, worth $1,036); Saskatchewan $14,266 at 10.5% ($1,498; child supplement $14,266, worth $2,996).
Territories. Northwest Territories $14,758 at 5.9% ($871); Nunavut $16,733 at 4% ($669); Yukon $10,341 at 6.4% ($662). The under-18 supplement for the territories was not verified at build time, so for a claimant under 18 in a territory this calculator shows the adult amount only and says so. Check the CRA before claiming a supplement there.
Quebec. Quebec's provincial disability credit is separate and runs through Revenu Québec. Only the federal credit is shown for Quebec. Check Revenu Québec for the provincial amount.
What this estimator leaves out. Whether the impairment qualifies (the CRA decides that on Form T2201), the reduction of the child supplement by care expenses, retroactive claims for earlier years, and any other credit the claimant may have. The amounts shown are maximums, assuming enough tax is owed to use them or that a supporting family member claims the unused part.
Sources: Canada Revenue Agency, Indexation adjustment for personal income tax and benefit amounts (Canada.ca), for the 2026 federal disability amount of $10,341 and the child supplement of $6,032. Provincial disability amounts and lowest rates are from the 2026 non-refundable personal tax credit tables published by TaxTips.ca, cross-checked against the KPMG 2026 personal tax tables and the CRA's 2026 TD1 forms. The 14% lowest federal rate for 2026 is as published by the CRA. Where a figure could not be verified, this page says to check the official page instead of stating it.