Tax for Stittsville's Trades, Subcontractors and Home-Run Businesses

A Stittsville trade running out of a truck and a garage has three tax questions and they arrive in a fixed order. You must register for GST/HST once taxable revenue crosses the threshold, and the date you must start charging depends on whether you crossed it in one quarter or across four. Your truck and your tools are deductible only to the extent you can prove the business share, which means a logbook and receipts rather than an estimate. And if construction is your main business, the payments you make to subcontractors are reported to the CRA on a T5018, which makes your side of the same money visible too.

Drive the Carp Road corridor on a weekday morning and half the traffic is work trucks: framers, electricians, landscapers, HVAC crews, many of them run by people who live a few minutes away in the newer Stittsville subdivisions off Fernbank or Hazeldean. A lot of these businesses started the same way, one person with a trade, a truck, and a garage full of tools, invoicing under their own name. That is a real business the moment the first invoice goes out, and the tax questions arrive whether or not anyone has thought about them.

The HST registration line is closer than people think

A sole proprietor does not register for HST on day one. You are required to register once your worldwide taxable revenue crosses the small supplier threshold, which for 2026 is $30,000 measured over four consecutive calendar quarters, counting revenue of associated persons as well as your own. For a busy trade in a growing part of town that threshold arrives fast, sometimes inside the first season.

What most people get wrong is not the number, it is the date. Crossing the threshold in a single quarter and crossing it gradually across four produce different effective dates, and the difference decides whether the tax on a particular invoice was yours to charge.

The half that gets missed is the upside. Once registered you claim input tax credits for the HST you pay on materials, fuel, tools and equipment, which for a trade buying lumber and supplies constantly is a meaningful recovery. Many small Stittsville operators register voluntarily before they have to for exactly that reason, because their customers are often builders and other businesses who claim the tax back anyway. Input tax credits also carry documentary requirements: above modest dollar thresholds the supporting invoice has to show the supplier’s GST/HST registration number, so a handwritten receipt from a supply yard that omits it is a credit you can lose on review. The registration rules and the input tax credit rules are worth reading together rather than separately.

The wrong move is to cross the threshold without noticing, keep invoicing without tax, and later owe HST you never collected out of your own margin. The CRA does not care that the customer is gone; the tax was payable on the supply.

Deductions live or die on records, not on what is deductible

The genuine business costs of a trade are deductible, and there are a lot of them: materials, subtrade labour, tools, safety gear, phone, insurance, and the truck. The truck is where most of the money and most of the errors sit. A vehicle used for both jobs and family life is deductible only for its business share, and that share has to be supported by a record of business versus personal kilometres. The drive from a Stittsville driveway to a site in Barrhaven is business; the same truck doing the grocery run is not, and the tax cannot tell them apart without your record.

The CRA does allow a shortcut, and it is worth knowing because almost nobody uses it. Keep a full logbook for one complete twelve-month period to establish a base year, and in later years a three-month sample period can stand in for the whole year, as long as the calculated business use stays within 10 percent of the base year. If it drifts further than that, the sample is only good for the three months it covers and you need a new base year. That is one disciplined year in exchange for several easy ones, which is a far better trade than reconstructing kilometres from memory under review. The full mechanics are in the vehicle expense deduction guide.

Tools follow their own logic. Smaller tools are generally expensed in the year you buy them, while larger equipment is capitalized and deducted over time through capital cost allowance at a rate set by the asset’s class. A home garage or basement used genuinely and regularly as the base of the business can support a business-use-of-home claim for a portion of heat, hydro, insurance and property costs, apportioned on a reasonable basis such as floor area. That claim cannot create or increase a business loss: it can take the business income to zero and the unused portion carries forward to a year with income to absorb it. None of this is exotic. It just requires that the receipts and the logbook exist, because a deduction you cannot document is a deduction you will lose.

The T5018 means the CRA already knows

Trades in Stittsville rarely work alone. A general hires subtrades, a busy subcontractor hires helpers of their own, and the money that flows between them is reported. The T5018 obligation applies where more than 50 percent of your business income comes from construction activities, the payments went to Canadian-resident subcontractors for construction services, and the total paid to that subcontractor in the period was more than $500 excluding GST/HST. You choose whether to report on a calendar year or a fiscal period.

The practical effect is that construction income is highly visible, and the old habit of leaving cash jobs off the return is genuinely dangerous in this trade specifically. If you are the sub being paid, an amount for your work has been reported under your number whether or not you report it yourself. Keep your invoices, match the deposits, and treat the T5018 reporting as confirmation that the income side of your return is not a matter of memory. The same goes when you are the payer: filing the slip is your obligation, not an optional courtesy, and the threshold is low enough that a single mid-sized subtrade crosses it.

When incorporating starts to make sense

Most Stittsville trades start as sole proprietors, and for a while that is the right call, because the business income flows onto your personal return and losses in a lean first year can offset other income. It also means you pay both halves of CPP on your net self-employment income, and once the first year’s tax bill is large enough the CRA will put you on quarterly instalments, which catches people who budgeted for one April payment.

Incorporation becomes worth a serious look once the business is consistently earning more than the household needs to live on. A corporation is taxed at a low combined rate on active business income within the small business deduction limit, which lets you defer personal tax on the earnings you do not draw out and smooth income across good years and slow ones. It is not free: separate filings, more bookkeeping, and real care about how you pay yourself, since the salary versus dividends choice affects RRSP room, CPP and how much of the deferral you actually keep. There is also a liability angle that matters to trades carrying real jobsite risk. The sole proprietorship versus corporation comparison walks through the numbers, and for a Stittsville subcontractor whose revenue has outgrown the sole proprietorship the question is no longer whether incorporating is possible but whether the deferral and protection are worth the added machinery.

If you run a trade out of Stittsville and want to know your actual registration date, whether your logbook would survive a review, or what incorporating would cost and save on your real numbers, send me last year’s revenue and this year’s run rate and I will work it out against your draw rather than a general rule.