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Personal tax (T1) · Toronto

Personal tax accountant in Toronto

Reviewed by EverStone CPA · July 2026

Ontario adds two things to a personal return that most provinces do not, and both are calculated in ways that make an incorporated owner's remuneration choice behave differently here. See personal tax services and the Toronto CPA page.

Quick answer: An incorporated owner filing in Toronto, Ontario meets two provincial features absent elsewhere: a surtax calculated on provincial tax payable rather than on income, and a separate health premium. Both change how a dividend behaves. EverStone prepares the personal and corporate returns together, entirely remotely.

Ontario computes basic provincial tax by applying rates to taxable income and subtracting credits, then adds a surtax calculated as a percentage of that basic tax rather than of income, so anything that raises or lowers provincial tax moves the surtax with it and a credit is worth more than its face rate suggests
A tax calculated on a tax behaves differently from one on income.

A tax calculated on a tax

Most provinces compute personal tax by applying rates to taxable income and then subtracting credits. Ontario does that and then adds a surtax computed as a percentage of the basic provincial tax payable itself, in tiers, once that amount passes defined levels. The distinction between a tax on income and a tax on tax sounds academic and is not. Because the surtax multiplies provincial tax rather than income, anything that increases provincial tax increases the surtax with it, and anything that reduces provincial tax — including non-refundable credits applied before the surtax is computed — reduces the surtax as well. A credit in Ontario is therefore worth more than its face rate suggests, and an additional dollar of provincial tax costs more than the marginal rate implies.

Why this matters more for dividends

A dividend is grossed up before tax is calculated and then reduced by a dividend tax credit. In a province with a simple rate-times-income structure, those two steps largely offset in a predictable way. In Ontario, the gross-up raises taxable income, which raises basic provincial tax, which raises the surtax — and the dividend tax credit then reduces provincial tax and therefore the surtax as well. The two effects do not cancel neatly, and the net result is that the crossover point between paying salary and paying dividends sits in a different place in Ontario than it does in a province without a surtax. An owner who relocates and keeps the same remuneration policy is not keeping the same outcome.

The health premium is a separate line

Ontario also levies a health premium paid through the personal income tax system, calculated by reference to taxable income and stepped rather than proportional. It is not a credit-reducible amount in the ordinary sense and it is not part of the surtax calculation. For an owner, the practical consequence is that it responds to taxable income — including the grossed-up amount of a dividend rather than the cash received — so it is another item that reacts to the composition of income and not only its size. The distinction between eligible and non-eligible dividends changes the size of the gross-up.

The federal half is the same everywhere

None of this touches the federal return, which is computed identically for a resident of Toronto and a resident of the Fraser Valley. That is the reason a CPA outside Ontario can prepare an Ontario return: the federal legislation is national, and the provincial layer is a defined schedule applied on top of it. What has to be right is the provincial schedule and the credits that belong to it. What does not need to change is who prepares the file. See Ontario tax facts and salary versus dividends.

Getting the sequence right

All of this is decided before the return is prepared. The amount and form of remuneration is set around the corporate year-end, and by filing season the surtax, the premium and the credits are simply consequences. The useful work therefore happens in the autumn for a December year-end, or in whatever month precedes the corporate year-end for anyone else — which is also why having one preparer for both returns matters more in Ontario than in a province with a flatter provincial structure.

What is covered

One Chartered Professional Accountant handles the whole file:

  • T1 preparation with the full Ontario provincial schedule
  • Surtax and health premium effects modelled before remuneration is set
  • Salary and dividend mix reviewed against the provincial structure
  • Corporate return prepared on the same file
  • Instalment review and CRA correspondence

Remote, and there is no Toronto office

EverStone operates from one office, in Abbotsford, British Columbia, and has no Toronto location. Engagements run entirely online — video meetings, e-signature and secure document upload — and personal income tax is federal legislation with a provincial schedule on top, so preparation is not tied to a local address.

About this article
EverStone CPA

Prepared and reviewed by a Chartered Professional Accountant at EverStone CPA, an Abbotsford CPA firm working with small businesses and incorporated owners across the Fraser Valley and Canada. About the firm →  ·  Book a free consult →

Key personal tax dates

The self-employed get longer to file, but not longer to pay — for a business operating in Toronto, Ontario
ObligationWhen it is due
Filing — most individualsApril 30
Filing — self-employedJune 15
Payment — everyone, including the self-employedApril 30
Sales tax where you operate13% HST — a single registration and a single return

Source: Personal tax deadlines in detail. General information, not advice.

Common questions

Toronto personal tax FAQ

What is the Ontario surtax?+
An additional amount calculated as a percentage of basic Ontario tax payable, in tiers, once that amount passes defined levels. Because it is computed on tax rather than on income, anything that raises provincial tax raises the surtax with it, and any credit that reduces provincial tax reduces the surtax as well.
Are non-refundable credits worth more in Ontario?+
In effect, yes. Because credits reduce basic provincial tax before the surtax is applied, reducing provincial tax also reduces the surtax computed on it. The combined benefit of a credit is therefore larger than its stated provincial rate implies, which makes credit placement across a household worth more attention here.
Why does Ontario change the salary-versus-dividend answer?+
Because the dividend gross-up raises taxable income and therefore basic provincial tax and the surtax on it, while the dividend tax credit reduces provincial tax and the surtax together. The two effects do not offset neatly, so the crossover between salary and dividends sits in a different place than in a province without a surtax.
What is the Ontario Health Premium?+
A separate amount paid through the personal income tax system, calculated by reference to taxable income in steps rather than proportionally. It responds to taxable income, which for an owner means the grossed-up amount of a dividend rather than the cash received — so it reacts to the composition of income, not just the total.
Can a CPA outside Ontario prepare an Ontario return?+
Yes. The federal calculation is national legislation and identical for every resident; the provincial layer is a defined schedule applied on top. What matters is that the provincial schedule and its credits are handled correctly and that the corporate and personal returns are prepared from one consistent set of facts.
When should the remuneration decision be made?+
Before the corporate year-end, not at filing time. By the time the personal return is being prepared, the surtax, the premium and every credit are simply consequences of choices already made. For a December year-end that means the useful conversation happens in the autumn.

Incorporated in Toronto?

Have the provincial layer modelled before the remuneration decision, not after. Book a free, no-obligation consult.