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Trades accountant in Toronto

Reviewed by EverStone CPA · July 2026

Ontario runs construction on a different set of rails from British Columbia: one harmonised tax instead of two, compulsory workplace coverage that reaches the owner personally, and a statute with payment deadlines attached. EverStone is a CPA for incorporated contractors and a Toronto small-business accountant, working remotely.

Quick answer: Trades companies in Toronto, Ontario charge a single harmonised tax rather than separate federal and provincial ones, face compulsory workplace coverage that extends to owners in construction, and work under statutory holdback and prompt payment obligations. EverStone prepares the corporate return, HST filings and subtrade slips remotely.

Ontario replaces a trades company’s provincial sales tax judgement with a single 13% harmonised tax, but adds compulsory workplace coverage reaching owners in construction, statutory holdback and prompt payment obligations, and a cash-flow problem created by holding the full tax on progress billings between remittances
Four Ontario-specific obligations behind a simpler invoice.

One tax on the invoice, not two decisions

Ontario applies a single 13% harmonised sales tax rather than a federal tax plus a separate provincial one. That is a genuine structural simplification for a trades business, and it removes the question that dominates a BC contractor's estimating: whether a contract improves real property, and therefore whether provincial tax is a cost inside the price or a line on the invoice. In Ontario the tax is charged on the supply and recovered on the inputs. What replaces that question is a cash-flow one. Because the full amount is collected on progress billings and the input side is recovered on filing, a Toronto contractor holds significantly more tax money between remittances than a BC contractor does — and money held is money that gets spent unless the process prevents it. See the input tax credits guide.

Compulsory coverage reaches the owner

Ontario is unusual in extending mandatory workplace insurance coverage into construction at the ownership level. Under the province's expanded compulsory coverage rules, independent operators, sole proprietors, partners and executive officers of corporations carrying on business in construction generally must register and carry coverage, with limited exceptions — notably where a business does only home renovation work for a homeowner who hires and pays it directly. For an owner-operator moving from another province, this is the single most commonly missed obligation, because in much of the country an owner without employees simply has nothing to register. Employees always require coverage regardless.

Statutory holdback and a payment clock

Ontario's construction legislation requires a portion of the contract price to be held back on a project and provides for prompt payment obligations following a proper invoice, along with adjudication of payment disputes. The accounting effect of a statutory holdback is the same as anywhere: earned revenue that is not yet collectible sits in receivables, and holdbacks retained from subtrades represent costs already incurred that belong in the period the work happened. The effect of the payment obligations is different and specific — the invoice, and what makes it a proper one, becomes the event that starts a clock. Billing practices that were merely sloppy become billing practices that delay money.

Subtrade reporting is federal, and applies here too

The T5018 requirement is federal law, so an Ontario construction business that pays others for construction services reports those payments in the same way a BC one does. Toronto's density means a company often uses a long tail of small specialised subtrades, which makes the underlying question — is this a subtrade or an employee — more live, not less. The factors that decide it are control, ownership of tools, ability to subcontract and chance of profit or loss, and the consequences of guessing wrong land on the payer.

Instalments, seasonality and a compressed build window

Toronto's building season is compressed by winter in the same way the Fraser Valley's is by rain, and the result is the same: revenue arrives unevenly while tax obligations arrive on a calendar. Corporate instalments set from a flat prior-year formula routinely mismatch a construction company's actual cash position, and a strong season can create both a large balance owing and an instalment schedule that begins before the next season's receivables do. Modelling that in autumn is straightforward; discovering it in spring is not. See corporate tax instalments.

What is covered

One Chartered Professional Accountant handles the whole file:

  • T2 corporate return and year-end financial statements
  • HST registration, filing and input tax credit reconciliation
  • Statutory holdback schedules, receivable and payable sides
  • T5018 information returns and worker classification review
  • Job-costed bookkeeping and progress billing cut-off
  • Instalment planning built around the actual draw calendar

Remote, and there is no Toronto office

EverStone operates from one office, in Abbotsford, British Columbia, and has no Toronto location. Ontario engagements run entirely online — video meetings, e-signature and secure document exchange — and corporate tax is federal law with a provincial layer, so the work is not tied to a postcode. See accounting for Ontario businesses.

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 →

Common questions

Toronto trades accounting FAQ

Do Toronto contractors charge HST on construction work?+
Ontario applies a single 13% harmonised tax on the supply rather than separate federal and provincial taxes, and registrants recover the tax paid on inputs. That removes the BC question of whether provincial tax is a buried cost or an invoice line, but it means more tax money is held between remittances.
Does an owner-operator in Ontario construction need WSIB coverage?+
Generally yes. Ontario's expanded compulsory coverage rules extend registration and coverage to independent operators, sole proprietors, partners and executive officers carrying on business in construction. A limited exception covers businesses doing only home renovation work for a homeowner who hires and pays them directly. Employees always require coverage.
What does the statutory holdback do to the books?+
It creates earned revenue that is not yet collectible on the receivable side, and costs already incurred on the payable side where a company retains holdback from its own subtrades. Both belong in the period the work was performed. Deferring either to the release date misstates the margin on the job that produced it.
Why does invoice quality matter more in Ontario?+
Because the province's construction legislation ties prompt payment obligations to a proper invoice, so the document itself starts a timeline and can support an adjudication if payment does not follow. Billing that was previously just untidy becomes billing that delays cash, which makes invoice discipline a working-capital issue rather than an administrative one.
Do T5018 slips apply in Ontario?+
Yes — the requirement is federal, so province makes no difference. A construction business that pays others for construction services generally reports those payments. Toronto work often involves a long tail of small specialised subtrades, which makes the subtrade-versus-employee question more live rather than less.
Can a CPA in British Columbia file for a Toronto company?+
Yes. The engagement is delivered remotely by video call, e-signature and secure upload, and there is no Toronto office. Corporate income tax is federal legislation with a provincial layer, so what matters is that the corporate return, the HST filings and the books are all prepared from one consistent set of records.

Building in Toronto?

Corporate tax, HST, subtrade slips and holdback timing handled by one CPA who works in construction. Book a free consult.