Full-Service Payroll Processing for Mississauga Businesses
Managing payroll in Canada is far more complex than simply issuing employee paycheques. Between calculating CPP contributions, EI premiums, income tax withholdings, vacation pay, taxable benefits, and remitting everything to CRA on strict deadlines — payroll compliance is a significant administrative burden for Mississauga business owners.
Accountants Mississauga by BOMCAS Canada offers comprehensive, fully outsourced payroll services in Mississauga, Ontario. From processing your first payroll run to filing year-end T4 slips, we handle every aspect of payroll so you never have to worry about CRA penalties, missed deadlines, or payroll errors.
Our Payroll Services in Mississauga Include
Payroll Processing
Weekly, bi-weekly, semi-monthly or monthly payroll runs for any number of employees. Accurate calculation of gross pay, deductions, net pay and direct deposit setup.
CRA Payroll Remittances
Timely remittance of employer and employee CPP contributions, EI premiums, and income tax withholdings to CRA. We track remittance deadlines to avoid penalties.
T4 & T4A Slip Preparation
Year-end T4 (employees) and T4A (contractors/self-employed) slip preparation, electronic filing with CRA, and distribution to your employees by the February 28 deadline.
Record of Employment (ROE)
Preparation and electronic submission of ROE forms to Service Canada whenever an employee's employment is interrupted due to layoff, leave, dismissal or resignation.
Payroll Register & Reports
Detailed payroll registers, departmental reports, vacation accrual tracking and payroll summaries to keep management informed and CRA-ready at all times.
WSIB / WCB Reporting
WSIB premium remittances and annual WSIB reconciliation for Ontario employers. We ensure your Mississauga business remains compliant with workplace safety insurance requirements.
Taxable Benefits Administration
Proper treatment of employee taxable benefits — company vehicles, group insurance, employer RRSP contributions, gift cards and more — for accurate CRA reporting.
New Hire & Termination Processing
Onboarding new employees into payroll, updating TD1 forms, and processing terminations including final pay, vacation pay out, and ROE issuance.
CRA Payroll Remittance Schedules for Mississauga Employers
One of the most critical aspects of payroll compliance is understanding your CRA remittance frequency. The Canada Revenue Agency assigns remittance categories based on your Average Monthly Withholding Amount (AMWA):
| Remitter Type | AMWA Threshold | Remittance Frequency | Due Date |
|---|---|---|---|
| New Employer / Small Business | Under $25,000 | Monthly | 15th of following month |
| Regular Remitter | $25,000 – $99,999 | Twice per month | 15th & 25th |
| Quarterly Remitter | Under $3,000 (qualified) | Quarterly | 15th after quarter end |
| Accelerated Remitter (Tier 1) | $100,000 – $999,999 | Accelerated bi-weekly | 2nd-3rd working day |
| Accelerated Remitter (Tier 2) | $1 million+ | Same-day (same banking day) | Next banking day |
Our Mississauga payroll team monitors your remittance category and ensures every remittance is submitted on time. A single missed deadline can trigger CRA penalties of up to 10% of the amount owed.
Payroll Source Deductions – What Mississauga Employers Must Withhold
Every time you run payroll for an Ontario employee, you must calculate and deduct the following from their gross earnings:
- Canada Pension Plan (CPP) contributions – employee's share of CPP (up to annual maximum)
- Employment Insurance (EI) premiums – employee's share of EI (up to annual maximum insurable earnings)
- Federal and Ontario provincial income tax – based on federal/provincial TD1 forms and CRA payroll tables
As the employer, you must also remit the employer's share of CPP (equal to employee CPP) and EI (1.4× the employee EI premium). Our Mississauga payroll accountants calculate all source deductions accurately using the latest CRA payroll deduction tables.
Why Outsource Payroll to Accountants Mississauga?
- Eliminate CRA payroll penalties — we never miss a deadline
- Free up hours of management time every payroll cycle
- CPA-qualified payroll specialists with Ontario employment law knowledge
- Scalable service — from 1 employee to 200+ employees
- Confidential, secure payroll data handling
- Integrated with QuickBooks Online, Xero, and Sage accounting software
- Virtual service — serve Mississauga and all Ontario businesses remotely
- Fixed monthly pricing — budget with confidence
Payroll Key Deadlines for Ontario Businesses
- Monthly Remittances: 15th of the month following the pay period
- T4 / T4A Slips: Last day of February (employee copies + CRA filing)
- T4 Summary: Filed with CRA by last day of February
- ROE (Record of Employment): Within 5 calendar days of employee interruption of earnings
- WSIB Annual Reconciliation: February 28
- WSIB Quarterly Premiums: April 30, July 31, October 31, January 31
FAQs – Payroll Services Mississauga
We provide end-to-end payroll services including payroll processing (weekly, bi-weekly, semi-monthly, monthly), ROE preparation, T4/T4A slip preparation and filing, CRA payroll remittances (CPP, EI, income tax), WSIB/WCB reporting, and payroll compliance reviews. Our Mississauga payroll team handles everything so you can focus on running your business.
CRA payroll remittance frequency depends on your average monthly withholding amount (AMWA). New employers and businesses with AMWA under $25,000 remit monthly. Regular remitters with AMWA $25,000–$99,999 remit bi-weekly. Large employers over $100,000 AMWA remit accelerated (up to 3× per month). Our Mississauga payroll specialists manage all remittance schedules and deadlines for you.
T4 (Statement of Remuneration Paid) slips must be issued to employees and filed with CRA by the last day of February following the calendar year. For example, T4 slips for 2024 must be distributed to employees and filed with CRA by February 28, 2025. We handle all T4 preparation and electronic filing for Mississauga employers.
CRA penalizes late payroll remittances based on the amount overdue: 3% if 1–3 days late, 5% if 4–5 days late, 7% if 6–7 days late, and 10% if more than 7 days late or if amount is not remitted. Repeat failures can attract a 20% penalty. Our Mississauga payroll service ensures all remittances are submitted on time, every time.
Yes. We manage payroll for employees (with CRA source deductions) and prepare T4A slips for independent contractors paid over $500 in a calendar year. We also advise Mississauga businesses on employee vs. contractor classification to ensure full CRA compliance and avoid costly misclassification penalties.
Related Services
Bookkeeping Services Mississauga
Learn MoreCorporate Tax Accountant Mississauga
Learn MoreT4 / T4A Filing Mississauga
Learn MoreSmall Business Accounting Mississauga
Learn MoreGST/HST Filing Mississauga
Learn MoreBusiness Advisory Mississauga
Learn MoreServing These Ontario Cities
Get a Free Payroll Services Consultation in Mississauga
Let Accountants Mississauga by BOMCAS Canada take payroll off your plate. Contact us today for a free, no-obligation consultation. We serve businesses in Mississauga, the GTA and all of Ontario — in person and virtually.