how-to
How to Plan Taxes for a Construction Business
Last reviewed November 1, 2026 · Johnathan Pollock · 7 min read
Last Updated: October 28, 2026
Quick Summary
Construction business tax planning means matching your tax bill to the uneven way cash actually arrives, since progress billing and holdback make taxable income rarely match your bank balance. Plan deductions, GST/HST, and your salary-versus-dividend mix in advance so you fund your next job before you fund the CRA.
- Progress billing and holdback make taxable income rarely match your bank balance.
- Large equipment purchases go into a capital cost allowance class and are deducted over several years.
- Once you pass the small supplier threshold, GST/HST registration is required.
- Salary gives the company a tax deduction and creates RRSP room; dividends do not.
- Review revenue, receipts, and equipment purchases about three months before year-end.
Table of Contents
- Why Construction Business Tax Planning Is Different
- Construction Business Tax Deductions in Canada You Should Be Claiming
- GST/HST for Construction Contractors in Ontario: What to Collect and Remit
- How the CRA Treats Construction Work in Progress Tax Treatment in Canada
- Salary vs. Dividends: Paying Yourself From an Incorporated Construction Company
- Your Construction Business Year-End Tax Planning Checklist
- Book a Construction Tax Planning Review With Thompson & Pollock Wealth Inc.
- Frequently Asked Questions
Why Construction Business Tax Planning Is Different
Most small business owners file a tax return. Construction owners file a tax return while money is still moving through the business in three directions at once. Holdback sits unpaid on completed work. Materials get bought months before the invoice goes out. A crew gets paid every Friday whether or not the client has paid.
That timing gap is why construction business tax planning is its own discipline. A profitable year on paper can leave you with no cash to cover the tax bill.
Three things make construction different:
- Progress billing and holdback mean revenue arrives unevenly, so your taxable income rarely matches your bank balance.
- Heavy equipment and vehicle costs create large capital purchases that need to be deducted on a schedule, not all at once.
- A mix of employees and subcontractors makes payroll and source deductions more complex than in most small businesses.
Get the timing right and you keep cash working in the business. Get it wrong and you fund the CRA before you fund your next job.
Construction Business Tax Deductions in Canada You Should Be Claiming
The most commonly missed construction business tax deductions in Canada are the everyday operating costs owners pay out of pocket and never record. The rule is simple: if you spent it to earn business income, write it down and keep the receipt.
The Canada Revenue Agency sets the rules on what counts as a deductible business expense. You can deduct most reasonable costs, but capital items get spread over several years rather than claimed at once.
Vehicle, Equipment, and Fuel Costs
Equipment works differently. Larger purchases go into a capital cost allowance class and get deducted over several years. That means the deduction shows up long after the cash leaves your account, which is exactly why you plan for it in advance rather than at filing time.
Home Office, Tools, and Subcontractor Payments
Self-employed tradespeople juggling deductions, retirement savings, and uneven cash flow will find more depth in our financial planning guide for independent contractors.
GST/HST for Construction Contractors in Ontario: What to Collect and Remit
GST/HST for construction contractors depends on what you build, where, and for whom.
The Canada Revenue Agency administers GST/HST and publishes rules for how contractors charge and remit (GST/HST for businesses).
- Are you registered? Once you pass the small supplier threshold, registration is required (When to register for and start charging the GST/HST).
- What are you supplying? New home construction, renovation, and commercial work can carry different treatment.
- Who is the buyer? Sales to certain buyers and to Indigenous organizations can be zero-rated or exempt.
How the CRA Treats Construction Work in Progress Tax Treatment in Canada
For incorporated contractors, the bigger question is often what happens to the cash once it lands. An owner sitting on retained earnings with no plan for them is a common starting point. Our anonymized case study of an Ontario plumbing contractor who restructured retained earnings shows how one owner put idle corporate cash to work, funded a partner buy/sell, and covered key-person risk.
Salary vs. Dividends: Paying Yourself From an Incorporated Construction Company
Here is how the two compare in practice:
| Factor | Salary | Dividends |
|---|---|---|
| Tax deduction for the company | Yes | No |
| CPP contributions | Required | Not required |
| RRSP room created | Yes | No |
| Payroll admin | Higher | Lower |
| Flexibility year to year | Lower | Higher |
Your Construction Business Year-End Tax Planning Checklist
A year-end checklist turns tax planning from a scramble into a routine. The work happens in two phases: the review three months out, then the filing and funding at year-end.
Three Months Out: Review and Adjust
- Total your year-to-date revenue and compare it to your forecast
- Confirm every vehicle log and receipt is current
- Review subcontractor documentation and business numbers
- Decide whether to accelerate or delay equipment purchases
- Set your salary and dividend mix for the year
- Check your HST account is current and reconciled
- Confirm your work-in-progress treatment for the year
- Review RRSP and retirement plan contributions
Year-End: File and Fund
Year-end is also when retention planning pays off. If you want to keep the crew you already trained, this is the point to look at group benefits and group retirement plans built for incorporated trades companies and apply for a fit review.
Book a Construction Tax Planning Review With Thompson & Pollock Wealth Inc.
Thompson & Pollock Wealth Inc. provides financial, insurance, and business planning services. The firm is a co-author of the Amazon best-seller The Entrepreneur's Toolkit.
Request an invitation.
Frequently Asked Questions
What taxes do construction businesses in Ontario need to plan for?
Construction businesses in Ontario deal with corporate income tax, GST/HST, payroll remittances (CPP and EI) for employees, and Ontario's Employer Health Tax once payroll passes the exemption threshold. Sole proprietors also pay personal income tax on business income. Each of these has its own deadlines and filing requirements, so construction business tax planning should map out every obligation on one calendar rather than treating them as separate chores.
Which expenses can a construction business deduct in Canada?
Common construction business tax deductions in Canada include fuel and vehicle costs for business travel, tools and equipment, safety gear, insurance, cell phone and internet, subcontractor payments, and a portion of home office costs if you work from home. Equipment purchases may qualify for the Capital Cost Allowance rather than a full deduction in one year. Keep receipts and log business use so each claim holds up if the CRA reviews your return.
How does the Canada Revenue Agency treat work in progress for construction businesses?
The CRA generally requires work in progress to be included in income at its fair market value at year-end, though incorporated businesses can elect to defer a portion of that amount. This construction work in progress tax treatment in Canada can create a tax bill on revenue you have not yet collected, which squeezes cash flow. Planning around WIP before year-end, rather than after, gives you room to manage the impact.
When should a construction business owner meet with a tax professional?
Book a review at least three months before your fiscal year-end, not after. That window lets you adjust equipment purchases, decide on salary versus dividends, and plan GST/HST remittances while there is still time to act. Construction business tax planning works best as an ongoing conversation, so a mid-year check-in alongside the year-end review keeps surprises off your desk in April.
