Marginal Tax Rate Ontario 2026: Rates, Brackets, and Calculator

If you’ve ever looked at a pay stub and wondered why your next raise seems to shrink after tax, you’ve already met the marginal tax rate. In Ontario, that rate isn’t a single number — it’s a stack of federal and provincial brackets, surtaxes, and health premiums that can make extra income cost more than you expect.

Highest combined marginal rate (Ontario, 2026): 53.53% ·
Income threshold for top bracket: $258,482 ·
Number of federal + Ontario brackets (2026): 5 federal + 5 provincial ·
Basic personal amount (federal, 2026): $15,705 (estimated) ·
Ontario surtax begins at: $5,315 (estimated) ·
Rate on first $52,886 of taxable income (Ontario): 5.05%

The six confirmed facts below summarise the key numbers that define Ontario’s marginal rates for 2026.

What is my marginal tax rate in Ontario?

How marginal tax rates work in Canada

• The marginal tax rate is the tax you pay on the next dollar of income you earn (Canada Revenue Agency).
• Canada uses a progressive system: as your income rises, each new chunk is taxed at a higher rate, but never at a rate lower than the previous bracket.
• Your total tax is the sum of federal tax plus provincial or territorial tax (Ontario in this case). Both levels apply their own sets of brackets.

Combined federal and Ontario marginal tax rates for 2026

For the 2026 tax year, Ontario residents face five provincial brackets and five federal brackets. The table below shows the combined marginal rate on ordinary income before the Ontario Health Premium. Surtaxes are not reflected in these base rates.

Sources: Ontario rates from KPMG’s 2026 tax rate summary; federal rates based on CRA projections. Note: Surtaxes and the Ontario Health Premium can push the effective combined rate higher (see the surtax section below).

The pattern: The base combined rate jumps from roughly 20% to 46% as income climbs, but that’s not the full story — surtaxes add another layer that many people overlook.

How do I calculate a marginal tax rate?

Step-by-step marginal rate calculation

1. Determine which federal bracket your next dollar falls into. For 2026, federal brackets start at 15% for income up to $55,867 (estimated).
2. Add the corresponding Ontario bracket rate for that same income level.
3. Check if you’re above the Ontario surtax thresholds: if your provincial tax exceeds $5,818, add 20% on that excess; if it exceeds $7,446, add 36% on the portion above $7,446 (KPMG surtax explanation).
4. If applicable, factor in the Ontario Health Premium (OHP) — an extra tax on high earners. TaxTips.ca warns it can increase marginal rates by up to 25% in some income bands (TaxTips.ca).
5. The sum of federal rate, effective provincial rate (after surtax), and OHP (if any) is your true combined marginal rate.

Example: marginal rate on $100,000 in Ontario

Let’s say your taxable income is $100,000 in 2026. Your next dollar falls into the second Ontario bracket (9.15%) and the second federal bracket (20.5%). The base combined is 29.65%. If you owe over $5,818 in Ontario tax, surtax adds roughly 1.8% (estimate). No OHP on a $100k salary. So your effective combined marginal rate is around 31.48%. Your total tax on $100,000 comes to approximately $24,900, giving an average tax rate of about 24.9% (EY Ontario tax calculator).

The catch: That 31.48% marginal rate means any bonus or extra shift pays less than 70 cents on the dollar — before other deductions.

What is the difference between marginal and average tax rates?

Marginal tax rate definition

The marginal tax rate is the percentage of tax applied to your last dollar of income. It determines the tax impact of earning more money.

Average tax rate definition

Your average tax rate equals total tax paid divided by total taxable income. It’s a measure of your overall tax burden, not the cost of earning more.

Why the difference matters for financial planning

• When you decide to work overtime, take a bonus, or sell an asset, the marginal rate tells you how much of that extra income you get to keep.
• The average rate helps you compare your overall burden to others, but it’s the marginal rate that drives behaviour.
• For a $100,000 taxable income in Ontario (2026), the average rate is roughly 24.9%, while the marginal rate is about 31.48% — a 6.6 percentage-point gap that can surprise many taxpayers (TaxTips.ca).

“Provincial and territorial income tax rates vary across Canada but are generally calculated in the same way as federal income tax, except in Quebec.”

— Canada Revenue Agency (CRA FAQ)

The trade‑off: High marginal rates can discourage extra effort or investment; knowing your average rate gives you a healthier perspective on your overall position.

What is the 60% trap?

When does the 60% trap occur?

The “60% trap” isn’t an official tax bracket — it’s a situation where your effective marginal rate exceeds 60% due to the simultaneous withdrawal (clawback) of federal and provincial benefits as your income rises. It most commonly affects families with children receiving the Canada Child Benefit (CCB) and who also see their income cross thresholds for the GST/HST credit and the Ontario Trillium Benefit.

Income range where clawbacks push effective marginal rate above 60%

• The CCB phase‑out starts when family net income exceeds about $34,863 (2025 figure; 2026 thresholds TBC).
• Between roughly $70,000 and $120,000 of family income, the combination of higher marginal taxes plus CCB clawback can push the effective rate above 60%.
• Ontario’s surtax adds to the effect: because surtax is calculated on provincial tax, the clawback of benefits occurs on the after‑surtax income, compounding the marginal hit.

The implication: The 60% trap is a real disincentive for middle‑income families to increase their earnings. Careful tax planning — such as splitting income or using RRSP contributions — can reduce the clawback impact.

What is the marginal tax bracket for 2026?

2026 Ontario tax brackets (combined with federal)

We already showed the combined base rates above. For the full picture including surtax, here is how the brackets map to effective marginal rates on ordinary income.

Note: The top 53.53% effective rate includes federal 33%, Ontario base 13.16%, surtax (~4.5%), and OHP (~2.4%). Sources: KPMG, TaxTips.ca.

2026 federal tax brackets

• 15% on the first $55,867 (estimated indexed amount)
• 20.5% on the next $55,867–$111,733
• 26% on the next $111,733–$173,205
• 29% on the next $173,205–$246,752
• 33% on income over $246,752

How brackets compare to 2025

All 2026 brackets are indexed to inflation. According to KPMG, Ontario’s inflation factor for 2026 is about 2.05%, meaning most bracket thresholds will rise by that percentage compared to 2025. The $150,000 and $220,000 Ontario brackets are not indexed, so those thresholds remain fixed.

Why this matters: Indexation prevents “bracket creep” — without it, inflation would push you into higher brackets even if your real income doesn’t change.

“Ontario’s surtax effectively increases the top marginal tax rate for Ontario residents to 20.53%.”

— KPMG (2026 tax rate summary)

How much income tax do I pay on $300,000 in Ontario?

For a taxpayer with $300,000 in taxable income (all from ordinary sources), the marginal rate on the portion above $258,482 is 53.53%. The total estimated tax for 2026 is approximately $122,000, giving an effective average rate of about 40.7% (EY). The marginal rate on the last dollar is 53.53%, but the average rate is nearly 13 points lower because the first $100k or so is taxed at much lower rates.

The pattern: High earners face a steep marginal rate on the top portion, but their average rate stays below 45% — a key distinction when comparing tax burdens across provinces.

Timeline of key dates for 2026 Ontario taxes

• January 1, 2026 – New indexed tax brackets take effect for the 2026 tax year (CRA).
• February 2026 – CRA publishes official 2026 tax rates and bracket tables.
• April 30, 2026 – Deadline for filing 2025 tax returns (if you owe tax).
• January 2027 – 2027 brackets announced (based on 2026 inflation).

Confirmed facts vs. What remains unclear

Expert perspectives

“The Ontario health premium can materially change the effective combined marginal tax rate, so bracket‑only comparisons can understate the true marginal cost of additional income.”

— TaxTips.ca (Ontario tax rates page)

“For 2026, Ontario’s combined marginal tax rate on ordinary income in the first bracket is 19.05%, before the Ontario Health Premium.”

— TaxTips.ca (2026 marginal rate table)

The editorial read: Even trusted sources like TaxTips.ca and KPMG disagree on small details (e.g., whether OHP is included in top‑rate calculations), so always check the most recent official CRA publication when making real financial decisions.

Summing it up

Ontario’s marginal tax rate in 2026 is a layered system of federal and provincial brackets, surtaxes, and benefit clawbacks that can push the effective rate far above the headline number. For a single earner with $100,000 of taxable income, the marginal rate will sit around 31.5% — but for a family with children earning between $70,000 and $120,000, the 60% trap can make each extra dollar of earnings shrink dramatically. For Ontario taxpayers, the takeaway is clear: before taking on extra income — whether from overtime, a bonus, or investments — run your numbers through the combined federal‑provincial marginal rate calculator, and factor in surtaxes and benefit clawbacks, or you may end up keeping far less than you expect.

For a detailed breakdown of how these brackets apply to different income levels, see the Ontario marginal tax rate guide.

Frequently asked questions