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Payroll & source deductions · Windsor

Payroll services in Windsor

Windsor payrolls swing. A mould shop adds a shift for a new program, a greenhouse brings in seasonal workers for the growing season, a contractor lays off crews when the ground freezes. EverStone runs payroll for Windsor and Essex County employers remotely, with source deductions, Employer Health Tax, WSIB and slips handled on a written fixed scope.

Quick answer: A Windsor employer withholds income tax, CPP and EI from each pay and remits them to the CRA with the employer’s share. It pays Ontario Employer Health Tax once annual Ontario payroll passes the exemption, and reports to WSIB where coverage applies. T4 slips are due by the last day of February. EverStone runs that cycle remotely, including seasonal hires and records of employment. Payroll is included in monthly bookkeeping from $300 a month.

Source deductions, remitted on time

Every pay run has three federal deductions: income tax, CPP contributions and EI premiums, with the employer adding its own CPP and EI share. They are held in trust for the Crown and remitted to the CRA on a schedule set by the size of your payroll. A late remittance attracts a penalty even if the amount is right, and unremitted deductions are one of the few business debts the CRA can pursue against directors personally. We calculate each pay, prepare the remittance, and reconcile the payroll account so the year-end T4 summary agrees with what was paid. The remittance calendar shows the due dates, and payroll remittances explains the RP account behind them.

Employer Health Tax: the rate is picked before the exemption

Ontario’s Employer Health Tax is paid by the employer on Ontario remuneration, and it is graduated. The order of operations trips people up: you choose the rate from the band table using total Ontario payroll before the exemption, then subtract the $1,000,000 exemption and apply that rate to what remains. Associated employers share a single exemption and must agree how to split it. For a Windsor shop that adds a second shift or a greenhouse with a large seasonal crew, crossing the exemption mid-year is common, and accruing the tax as payroll runs avoids one large unbudgeted charge. The bands are on the Ontario tax facts page.

Families of companies need particular care. An owner with a manufacturing corporation and a separate property or trucking corporation may find the two are associated, which means one exemption between them, not two. The allocation is agreed each year, and a group that grows past the upper payroll limit loses the exemption entirely. We check association when we take on the file rather than when the first return is due.

WSIB, reported alongside payroll

The Workplace Safety and Insurance Board is separate from both the CRA and the Ministry of Finance, with its own registration, rate group and reporting. Coverage is compulsory in most construction work and many other industries, and premiums are calculated on insurable earnings from the same payroll records. Contractors need a clearance certificate to show general contractors that their account is in good standing, and a lapse can hold up payment on a job. We report insurable earnings from the payroll ledger so the two agree, and flag rate-group questions before they become an audit issue. The Windsor contractors page covers the clearance side.

Seasonal and foreign agricultural workers

The greenhouses of Leamington and Kingsville rely on seasonal staff, many of them foreign agricultural workers who arrive for the growing season and return home afterwards. They are employees, and the usual payroll rules apply: income tax is withheld, and CPP and EI generally apply to their earnings the same way as to a local hire. Housing, transportation and meals provided by the employer each need to be looked at for taxable-benefit and deduction treatment, and slips have to reach workers who may be out of the country by February. We set up the payroll before the first workers arrive, confirm each worker’s social insurance number and address for the slips. We also keep a clear record of any amounts recovered from wages under the program’s rules so the deductions on each pay stub can be explained line by line. The Essex County greenhouse page covers the rest of a grower’s file.

Shifts, shutdowns and records of employment

Manufacturing payroll in Windsor follows production. Overtime, shift premiums and statutory holiday pay under Ontario’s employment standards have to be calculated correctly on every run, and vacation pay has to be accrued or paid out as earned. When a program ends or a plant slows, layoffs follow, and each one needs a record of employment filed so the worker can claim EI. A late or wrong ROE is the payroll error employees notice first. Records of employment and statutory holiday pay cover the rules. The Windsor manufacturers page covers the costing side of labour.

Drivers: employees or contractors?

Trucking companies in Windsor often run a mix of employed drivers and owner-operators, and the line between them decides whether deductions are withheld at all. An owner-operator with a truck, a business number and several customers is usually a contractor; a driver who drives the company’s tractor on the company’s schedule is usually an employee, whatever the contract calls them. The CRA looks at control, ownership of tools and chance of profit. Getting it wrong means assessed CPP and EI for past years. Employee or contractor explains the test, and the Windsor trucking page covers carrier payroll.

What the payroll service includes

Each pay: gross-to-net calculations, pay stubs and direct deposit files. Each remittance period: the CRA remittance prepared. Each year: T4 and T4A slips and summaries by the last day of February, the Employer Health Tax return, and WSIB reconciliation. As needed: records of employment, new-hire setup and terminations. Payroll is usually part of a combined engagement; the typical trades-corporation bundle of bookkeeping, payroll and a year-end T2 with statements is usually $450 to $650 a month. The fee is fixed in writing after a free consultation, and the pricing page shows the full schedule.

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

Who a Windsor payroll reports to

Who a Windsor payroll reports to Each payroll obligation and where it goes — for an employer operating in Windsor, Ontario
ObligationWhere it goes
Income tax, CPP and EIRemitted to the CRA on your assigned schedule
Employer Health TaxOntario Ministry of Finance, above the exemption
Workplace coverageWSIB, on insurable earnings
SlipsT4 and T4A by the last day of February
Layoffs and quitsRecord of employment filed with Service Canada

Source: Payroll guides. General information, not advice.

Common questions

Windsor payroll questions

Do seasonal foreign workers pay CPP and EI?+
Generally yes. Foreign agricultural workers employed in Ontario are employees, and CPP and EI apply to their earnings as they do to local staff. Income tax is withheld too. Ask about your case →
When do I start paying Employer Health Tax?+
Once your annual Ontario payroll passes the exemption. The rate is chosen from total payroll before the exemption is deducted, then applied to the amount above it.
Can you take over payroll partway through the year?+
Yes. We carry forward year-to-date figures for each employee so CPP and EI maximums and the T4 are correct at year-end.
What if deductions were missed in an earlier year?+
They can be corrected. We work out what should have been withheld, amend the slips, and deal with the CRA on the employer’s share, usually before the CRA raises it through a payroll review.
Do you handle vacation pay and statutory holidays?+
Yes. Vacation pay is accrued or paid out each run under Ontario’s employment standards, and statutory holiday pay is calculated from the employee’s actual earnings, not a flat day’s wage.
Do you file records of employment?+
Yes, electronically, when an employee is laid off, quits or has an interruption of earnings.
Does payroll need someone in Windsor?+
No. Hours come in electronically, deposits are sent from your bank, and every filing is online. EverStone runs it from Abbotsford.
What does payroll cost for a Windsor business?+
Nothing about a Windsor address changes the fee. Payroll is included in monthly bookkeeping from $300 a month; a payroll-only engagement is quoted by headcount and pay frequency, in writing, after a free consultation. See the published fees.
Do you work with businesses outside Windsor itself?+
Yes. Employers in LaSalle, Tecumseh, Lakeshore, Leamington and the rest of Essex County are set up the same way as those in Windsor: payroll runs remotely, remittances are scheduled, and the fee does not change with the address.

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Running payroll in Windsor?

Source deductions, Employer Health Tax, WSIB and slips handled by one CPA, at a fee fixed in writing.

Remote payroll from Abbotsford

EverStone is a one-CPA firm in Abbotsford, British Columbia, running Windsor payrolls entirely online. There is no Windsor office and no local staff. Timesheets arrive electronically, pay files go to your bank for release, and the CRA, Employer Health Tax and WSIB accounts are all managed online.

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.