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Contractor accountant in Hamilton

From infill on the lower city’s older streets to new subdivisions above the escarpment in Ancaster, Binbrook and upper Stoney Creek, Hamilton keeps its contractors busy. The accounting that comes with it is specific: holdbacks, progress draws, subcontractor slips and WSIB. EverStone is an accountant for incorporated contractors and a Hamilton small business accountant, at fixed fees, online.

Quick answer: Hamilton contractors work under Ontario’s Construction Act, so 10% of each progress bill is held back, and HST on that holdback is not payable until the holdback is. On top of that come T5018 slips for subcontractor payments, WSIB coverage and clearances, and a winter slowdown that makes instalments easy to get wrong. EverStone handles the T2, the T5018s, payroll and the filing calendar at a fixed fee agreed before work begins. Published fees start at $300 a month for bookkeeping and $100 for a personal return.

The 10% holdback and when revenue counts

Under Ontario’s Construction Act, the owner or the contractor above you holds back 10% of the value of work done until the holdback period has passed. For you, that money is earned and billed but not yet payable. The accounting question is timing and tracking. The work belongs to the year it was done, holdback included, but the cash arrives later and sometimes only when someone asks for it. Left inside ordinary receivables, holdbacks blur the aged listing and sit unclaimed long after they fall due. We keep holdback receivable as its own account, job by job, and flag each release date so the release invoice goes out on time. The Act’s prompt payment rules also give you a timetable to hold a payer to, which only helps if your invoices are dated and tracked properly. Construction holdbacks covers the accounting in more detail.

Progress billing and when HST becomes payable

Ontario charges 13% HST on construction services, and on a progress-billed job the question is not whether HST applies but when you owe it. On a progress bill, HST generally becomes payable on the earlier of the day you are paid and the day the invoice is issued or payment falls due under the contract. The holdback portion is different: the HST on it becomes payable when the holdback is paid or becomes payable, not when the underlying bill went out. Get that wrong and you either remit tax on money you will not see for months, or under-report and pick up interest later. We set up progress invoices so the HST on the draw and the HST on the holdback are split from the start.

T5018 slips and the subcontractor question

If most of your business income comes from construction and you pay subcontractors for construction services, you generally file T5018 information returns reporting those payments. They are due six months after the end of the reporting period, which you can set to your fiscal year or the calendar year. The harder question sits behind the slip: is the person you are paying really a subcontractor? A framer working only for you, on your schedule, with your tools, may look like an employee to the CRA, and reclassification brings CPP and EI with interest. The T5018 form guide and subcontractor versus employee cover both halves.

WSIB, clearances and who has to be covered

Ontario makes WSIB coverage compulsory for most construction work, and in construction that coverage reaches further than in most industries, including many independent operators and some owners. Premiums depend on your classification and are reported to WSIB separately from anything the CRA sees. The part that catches general contractors is subcontractors: if a sub has no coverage, the hiring contractor can be held responsible for their premiums. We keep each sub’s clearance with their invoice and check it before the final payment on a job, not after.

Equipment, winter and instalments

Hamilton’s building season slows when the ground freezes, and that shape runs through the whole file. Revenue bunches into spring to fall while trucks, equipment payments and insurance run all year. Instalments set on a flat line from last year’s tax can leave you overpaying through a quiet winter or short after a strong summer. Equipment adds its own timing: a skid steer, excavator or work truck is recovered through capital cost allowance, and it has to be available for use before the year end to be claimed. We set instalments against your real pattern and look at equipment purchases against the year’s projected income before you sign. Cash flow for a seasonal business covers the planning side.

The pickup is its own question. A company truck that also takes the kids to hockey creates a taxable benefit for the owner unless personal use is tracked and kept low, and the CRA asks for a log, not an estimate. A simple record of business trips kept through the year is the cheapest defence there is. The mileage and vehicle log shows what to record.

What EverStone handles for you

One CPA, one fixed fee agreed up front:

  • T2 corporate return and year-end financial statements
  • Holdbacks tracked job by job and reviewed at the cut-off
  • Progress invoices set up so HST on draws and holdbacks is split
  • T5018 subcontractor information returns
  • Subcontractor-versus-employee positions documented
  • WSIB reporting support and clearance records
  • Equipment CCA and instalments planned around the season

Fixed fees, fully online

EverStone is an Abbotsford CPA firm and Hamilton is three hours ahead, so our morning lands in your afternoon. Everything runs by video, phone and secure upload, which fits a business run from a truck. A typical trades-corporation bundle of bookkeeping, payroll and the year-end T2 with statements usually runs $450–$650 a month. The fee is fixed and agreed before work starts. See what it costs.

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 contractors across the Fraser Valley and Canada. Updated September 2026. About the firm  ·  Book a free consult

What a Hamilton contractor has to get right

What a Hamilton contractor has to get right The items that decide a contractor’s year — for a business operating in Hamilton, Ontario
ItemWhy it matters
Construction Act holdback10% held until the holdback period ends, tracked separately job by job
HST on progress billsPayable on the draw when billed or paid; on the holdback when it is paid or payable
T5018 slipsDue six months after the end of the reporting period
WSIBCompulsory for most construction work, with clearances checked on subs
Sales tax where you operate13% HST, a single registration and a single return

Source: Accounting for contractors. General information, not advice.

Other services for Hamilton businesses: personal tax.

Common questions

Hamilton accounting for construction contractors FAQ

How is the Construction Act holdback treated in my books?+
As its own receivable, job by job. The work is done and billed, but 10% is held until the holdback period ends. Tracking it separately shows what is due for release and stops holdbacks going unclaimed. Ask about your case →
When do I remit HST on a holdback?+
When the holdback is paid or becomes payable, whichever comes first, rather than when the progress bill went out. The HST on the rest of the draw follows the ordinary timing.
Do Hamilton contractors have to file T5018s?+
If most of your business income is from construction and you pay subcontractors for construction services, generally yes. The slips are due six months after the end of the reporting period you choose.
Am I responsible if my subcontractor has no WSIB coverage?+
You can be. A hiring contractor can be held liable for premiums owed by an uncovered sub, which is why a clearance should be checked before paying and kept on file.
Should I buy a new truck before my year end?+
Only if it is available for use before the year end and the year’s income can absorb the CCA. A purchase in a thin year can simply move a deduction to where it is not needed.
Do you work with trades across Hamilton?+
Yes — incorporated contractors and trades in Hamilton, Stoney Creek, Ancaster, Dundas and Burlington, and across Ontario. Everything is handled online, which works better around a site schedule than an office appointment.
What does an accountant cost for a Hamilton construction business?+
The fee is the same in Hamilton as anywhere else EverStone works. Monthly bookkeeping starts from $300 a month and a personal return from $100; a corporate return is quoted after a free consultation. A single question can go to a 45-minute Advice Call, a flat fee of $200 + GST. Every fee is fixed in writing first. See the published fees.

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Contracting in Hamilton?

One CPA for your corporate tax, books and planning. Fixed fee, fully online. Book a free consult.

Remote contractor accounting from Abbotsford

Contractor accounting for Hamilton clients is delivered remotely from Abbotsford, British Columbia. There is no Hamilton office and no local team. Meetings are virtual, documents are signed electronically, and you deal with the CPA directly rather than an intake desk. Holdbacks, subcontractor payments and equipment costs are tracked as they happen rather than reconstructed at year end.

Talk to a CPA about this

One Chartered Professional Accountant, start to finish. Fixed fees, quoted in writing before any work begins, and no obligation from a first conversation.