GST/HST, CRA payroll and construction holdback for Canadian electrical contractors

US electrical contractors who take Canadian work still run the same business this site covers: pricing, labor, wiring margins, and cash flow. This guide adds the Canadian tax layer, GST/HST, CRA payroll, and provincial holdback, so you can protect margin on cross-border projects and keep every remittance date in view.

Keep tax money, payroll money, and holdback money separate from operating cash. Read this as a margin checklist before you price cross-border work.

This site is built for US electrical contractors who care about wiring work, labor costs, pricing, and margins. Canadian projects add rules, not a new business model.

GST/HST is trust money, CRA payroll is trust money, and holdback is your money delayed by provincial statute. If you track those three streams like job costs, you can bid Canadian work without letting tax timing eat the margin you quoted.

What to take away

What a Canadian electrical contractor must remit, and when

Every dollar you collect splits into money that is yours and money you hold for someone else. For an electrical contractor, the money held for others is the larger pile. It includes GST/HST collected on invoices, payroll source deductions withheld from your crew, and holdback retained by the general contractor until the job closes out.

The GST/HST you charge is not revenue. It is trust money. Under the Excise Tax Act, you collect tax on behalf of the federal government and remit the difference between tax collected and input tax credits claimed on materials, fuel, tools and subcontracted labour (Excise Tax Act).

Treating that balance as working capital is the most common way small electrical shops get into trouble.

Payroll source deductions work the same way. You withhold CPP contributions, EI premiums and income tax from each paycheque, add your share of CPP and EI, and send the total to the CRA. The employee's portion was never yours to spend.

Holdback is different again. It is your own money, invoiced and earned, but a provincial statute lets the payer keep a percentage for a fixed period. You have done the work and issued the invoice, and you still cannot spend the cash.

Three streams, three sets of deadlines, one bank account. Bookkeepers who track them together produce a cash position that looks healthier than reality. Separate the GST/HST account, the payroll account and the operating account, and the picture sharpens.

The three pots of money

The table is the whole system in miniature. Everything below fills in the dates.

GST/HST registration thresholds and rates by province

Registration is not optional once you cross the small supplier threshold. Taxable supplies above $30,000 over four consecutive calendar quarters force registration. The CRA sets out the counting rules for start-ups and for businesses that cross mid-quarter (When to register for and start charging the GST/HST - Canada.ca).

Most electrical contractors cross that line in their first year of serious work. One service upgrade, a small commercial fit-out and a few panel changes will do it. Registering voluntarily before you must is often the better move, because input tax credits on a van, tools and stock let you recover tax you already paid.

Rates differ by province, and the difference matters when you price work across a border. Ontario and the Atlantic provinces charge HST, a single harmonized tax: 13% in Ontario and 15% in Nova Scotia, New Brunswick, Newfoundland and Labrador and Prince Edward Island. Alberta, Yukon, the Northwest Territories and Nunavut charge the federal 5% GST only, with no provincial component.

British Columbia, Saskatchewan and Manitoba charge GST plus provincial sales tax, and PST generally does not apply to your labour but does apply to materials you buy.

Quebec runs its own system, administered by Revenu Quebec rather than the CRA. If you work in Quebec, you file there, not federally. Contractors who take a job in Montreal and keep filing through the CRA account end up with two sets of notices.

Rates by province

Check the current rate before you quote. Provincial rates change, and a quote built on last year's number comes straight out of margin. Building that check into your pricing that protects profit routine takes ten minutes and saves the argument later.

GST/HST on materials, subcontractors and change orders

Materials you buy for a job carry GST/HST that you generally recover as an input tax credit. Materials you resell or install as part of a contract are taxed again on your invoice to the customer. You are not double-taxed, but you are financing the tax in between.

That gap is real money on a big job. Buy $40,000 of switchgear, wire and fixtures, and you have paid the tax weeks before the customer pays you. Your input tax credit comes back on the next return, which may be a month or a quarter away.

Subcontractors are the other half of the picture. A subcontracted electrician charges GST/HST on their invoice to you, and you claim that tax as an input tax credit. The rule that catches contractors is the one about who is responsible when the sub is not registered or not remitting.

You can lose the credit if the invoice does not meet the documentary requirements.

Get a written invoice showing the supplier's GST/HST number, the amount of tax, and the date. A text message and an e-transfer is not an invoice, and the CRA will disallow the credit.

Change orders are where disputes start. A verbal change to add circuits or relocate a panel is a taxable supply like any other, and it should be priced, taxed and invoiced in writing. Unbilled extras that never appear on an invoice are also unreported revenue, which is a GST/HST problem on top of a collections problem.

Example: a $120,000 commercial fit-out in Ontario

Assume a 13% HST job with a 10% holdback and a subcontracted crew.

Note what happened: the holdback delayed $12,000 of your own money, and the HST on it was still reportable when the supply happened, not when the cash landed. Contractors who wait to report the tax until the holdback releases end up short at filing time.

CRA payroll remittance schedule and T4 filing for electrical crews

The CRA assigns each employer a remitter type based on the average monthly withholding from the previous two years. The types run from quarterly to accelerated thresholds. The agency explains the thresholds and the due dates in its remitting overview (Payroll correspondence you need to remit (pay) - Canada.ca).

A small shop with one or two office staff may sit on quarterly remitting. Add a crew of eight electricians and the withholding climbs fast, which moves you to monthly and possibly to one of the accelerated categories. The CRA's PD7A statement of account shows the balance it is tracking for each period.

The due date follows the type. Quarterly remitters pay by the 15th of the month after the end of the quarter. Regular remitters pay by the 15th of the following month. Threshold 1 accelerated remitters pay twice a month: by the 25th for the first 15 days of the month, and by the 10th of the next month for the rest. Threshold 2 accelerated remitters pay within three business days of each pay date.

Miss the accelerated threshold and you are remitting on a schedule you did not plan for. That is a cash flow shock in the middle of a busy season.

T4 slips and the T4 summary are separate from remitting. Slips go to employees and to the CRA by the end of February following the tax year, and the summary is filed with them. Late slips carry a penalty per slip, and the penalty rises with the number of slips and how late you are.

Keep the payroll records that support every slip. Hours, wage rates, vacation pay and taxable benefits all feed the T4, and a slip that does not match the payroll register invites a review. If your records are thin, the electrical contractor equipment article covers the books an owner has to keep.

Payroll calendar for a typical year

Employee versus contractor treatment for subcontracted electricians

The CRA looks at the working relationship, not the label on the contract. A subcontracted electrician who works your hours, uses your van and takes direction from your foreman is likely an employee in the agency's view, whatever the invoice says.

The CRA sets out the tests it applies to determine the relationship (Determine the relationship with the employer or the payer - Canada.ca).

The cost of getting this wrong lands on you. If the CRA rules that a sub was an employee, you owe the unremitted CPP, EI and income tax, plus penalties and interest. The sub may owe tax too, but you are the one holding the assessment.

Control is the central test. Who decides when the work happens, where it happens and how it is done? A true independent contractor controls their own schedule and method, can work for other clients, and bears the risk of loss on the job.

Integration matters as well. If the sub's work is a core part of your business rather than a separate service sold to the public, the relationship looks more like employment.

Red Seal certification does not settle the question. A Red Seal Construction Electrician can be an employee or an independent contractor, and the certification travels between provinces under the Interprovincial Standards Red Seal Program. The relationship test is about the work arrangement, not the ticket.

Practical protection: use a written contract, let the sub invoice from their own registered business with their own GST/HST number, do not supply their tools, and do not put them on your payroll schedule. Document all of it. If the CRA reviews the file two years later, the paperwork is your defence.

Provincial construction holdback rules and lien timelines

Ontario's Construction Act sets a 10% holdback on the contract price and ties release to publication of substantial performance. A lien must be registered within 60 days after that publication, and missing the 60th day is how contractors lose the holdback claim.

Alberta's Prompt Payment and Construction Lien Act also uses 10%, and a lien must be registered within 45 days of the certificate of substantial performance. Its prompt payment timelines force owners and general contractors to pay within defined periods, so Alberta contractors who know the timelines can charge interest on late payment, which changes the collections conversation.

British Columbia's Builders Lien Act uses a 10% holdback as well, with a lien filing deadline of 45 days from completion, substantial performance, termination or abandonment and a holdback period that runs 55 days from the same event. British Columbia also requires the holdback to be held in trust, which is a stronger protection than it sounds.

Quebec works through the Civil Code of Quebec and its legal hypothec rather than a builders lien statute, so its rules do not map neatly onto the common law provinces. Saskatchewan's Builders' Lien Act, Manitoba's The Builders' Liens Act, Nova Scotia's Builders' Lien Act and Newfoundland and Labrador's Mechanics' Lien Act each carry their own holdback and registration deadlines.

Holdback and lien timelines at a glance

Verify the current statute before you rely on any of this. Provincial governments amend lien legislation, and a deadline you learned five years ago may have moved.

Two habits protect you. First, diary the substantial performance date and the lien deadline for every job, because the deadline is unforgiving and missing it can cost the whole holdback. Second, invoice the holdback the day it becomes due rather than waiting for the general contractor to remember.

Building a cash flow calendar around remittance and holdback release

A cash flow calendar for an electrical contractor is not a spreadsheet of invoices. It is a schedule of obligations with dates attached, built backwards from the days money must leave the account.

Start with the fixed dates. GST/HST filing and remitting depends on your reporting period: monthly and quarterly filers file and pay one month after the end of the period, and annual filers have until June 15 following a December 31 year end. Payroll remitting depends on your remitter type. T4 filing is the end of February. Those three are predictable, and they should be on the calendar before any job is priced.

Then layer the job dates. Progress billing dates, holdback release dates and lien deadlines come from the contract and the provincial statute. A job with a 10% holdback on a $200,000 contract ties up $20,000 for months.

Now match the two. If holdback on three jobs releases in the same month as a quarterly GST/HST payment and an accelerated payroll remittance, that month is tight even when the work is profitable. Moving a progress draw by two weeks can fix it.

This is where margin and cash diverge. A profitable job can still sink a contractor who cannot cover the remittance dates. The labour costs side of the estimate and the actually makes money analysis both feed the same calendar, because a job priced without the cost of carrying holdback is not priced correctly.

A worked cash flow month

Take a contractor with two active jobs, one crew of six and a monthly GST/HST filing period.

If the progress draw slips to the 28th, the remittance on the 15th still has to clear. That is the whole argument for holding a buffer in the tax account.

Penalties and interest when remittances slip

Late GST/HST filing carries a penalty based on a percentage of the net tax owing. A further penalty applies to repeat failures, and interest accrues on the unpaid amount from the due date (GST/HST filing penalties - File your GST/HST return - Canada.ca).

The penalty is not a flat fee. It scales with what you owe, so a large quarter filed late costs more than a small one. Interest runs daily on top.

Payroll failures are treated more seriously than GST/HST failures. An unremitted source deduction draws a penalty of 3% if it is cleared within three days, 5% within five days, and 10% otherwise, doubling to 20% where the CRA has already assessed a failure penalty for the same or the previous year, plus interest. In repeated cases the CRA can assess the directors personally under section 227.1 of the Income Tax Act. That is the risk that ends electrical contracting companies.

T4 slips filed late carry a per-slip penalty, and the amount rises with the number of slips and the lateness. A crew of twenty with late slips is an expensive mistake.

The practical rule is simple. File on time even when you cannot pay in full. The failure-to-file penalty is separate from the interest on the balance, and filing removes one of the two.

Set the remittance dates as recurring calendar entries with alerts a week ahead. Ask the CRA for a payment arrangement before the due date, not after. And keep the tax money in an account you cannot spend on a Friday afternoon.

Common questions