Complete financial clarity. Zero overhead.
ATS is a bilingual, CPA-led Montréal accounting firm serving Canadian small businesses for over a decade — bookkeeping, payroll, tax, fractional CFO and cross-border US–Canada tax (Canadian & US CPAs on staff). QuickBooks Certified ProAdvisor & Xero Partner, serving all provinces remotely, in English and French.
Businesses Served
Client Retention
Months Error-Free
Years in Business
Keep your financials up to date, tax-ready, and audit-proof with accurate, accrual-based bookkeeping. Our expert team ensures timely reconciliations, expense tracking, and reporting so you always have a clear view of your financial health.
Learn More →
Behind on your books? We'll get your financials back on track quickly and accurately, no matter how overdue. Our team cleans up, categorizes, and reconciles past transactions so you can move forward with confidence.
Learn More →
Error-free payroll processing, CRA & Revenu Québec remittances, year-end T4s and RL-1 slips — handled completely on your behalf. Your team gets paid on time, every time.
Learn More →
We manage your vendor invoices, payment schedules, and AP reconciliation so nothing slips through the cracks. Maintain strong supplier relationships and stay on top of cash flow — without the administrative burden.
Get a Quote →
Monthly financial reviews, internal controls, audit readiness, and variance analysis — controller-level oversight without the full-time salary. Ideal for growing businesses that need rigorous financial management.
Learn More →
Cash flow forecasting, strategic planning, investor-ready financials, and M&A support — executive-level financial strategy when you need to scale. Partner with a seasoned CFO without the full-time cost.
Learn More →
We handle bank reconciliations, expense tracking, GST/QST filings, and monthly financial statements so you always know exactly where your business stands. No more scrambling at year-end.
See Pricing →
We run payroll on time, remit source deductions to CRA and Revenu Québec, and issue T4s and RL-1s at year-end — completely off your plate. Not a single error in 14 months.
Talk to Our Team →
Cash flow forecasting, KPI dashboards, board-ready reporting, and fundraising support. Get the strategic financial partner your business needs to scale, at a fraction of the cost of a full-time CFO.
View CFO Plans →Keep your financials up to date, tax-ready, and audit-proof with accurate, accrual-based bookkeeping. Our expert team ensures timely reconciliations, expense tracking, and reporting so you always have a clear view of your financial health.
Behind on your books? We will get your financials back on track quickly and accurately, no matter how overdue. Our team cleans up, categorizes, and reconciles past transactions so you can move forward with confidence.
Ensure your team is paid accurately and on time, every time. We handle payroll processing, tax remittances, year-end T4s, and compliance so you do not have to worry about errors or delays.
From T2 corporate returns to GST/QST filings, our tax specialists ensure every deduction is captured and every deadline is met. We keep your business fully compliant with CRA and Revenu Québec.
Gain financial oversight and compliance support without hiring a full-time controller. We conduct monthly financial reviews, ensure audit readiness, and implement controls to safeguard your organization.
Make smarter financial decisions with strategic planning, cash flow forecasting, and financial reporting. Our outsourced CFOs provide the executive-level insights you need to scale efficiently and sustainably.
See cash flow, P&L, and tax liabilities in one place — updated automatically from your accounting software. No chasing spreadsheets. No surprises at tax time.
Our proven process ensures your bookkeeping, payroll, and compliance needs are handled with precision every single month.
We work with you to fully understand your business needs, financial complexity, and support requirements.
We architect the technology stack and design workflows between our team and yours for maximum efficiency.
We deploy the tools, handle catch-up bookkeeping, and train your team — seamless from day one.
Our team manages your work with day-to-day support from your dedicated Client Success Lead — every month.
Get the financial clarity you need to make confident decisions and grow sustainably.
Learn more
Track funding, ensure compliance, and focus on making an impact — we handle the rest.
Learn more
Manage costs, understand margins, and automate tedious payroll-related tasks.
Learn more
Efficiently manage time tracking, billing, and expenses with expert financial support.
Learn moreATS is a Canadian-based provider of cloud-integrated bookkeeping, payroll, and fractional CFO services designed for growing businesses and non-profits. We leverage secure cloud technology to deliver scalable financial oversight and audit-ready operations.
Bilingual in English and French, we understand the nuances of Quebec tax law, CRA compliance, and the specific financial realities of doing business in Canada.
Work With ATS →Our Values
We evolve with your business and continually improve how we serve you.
Your numbers are our responsibility — we take full accountability, every time.
Every decision we make is filtered through one question: what's best for the client?
We move fast, stay organized, and deliver clean financials — on time, every time.
Quebec Law 25 & Canadian privacy legislation compliant. Your data stays in Canada.
Not a single error in 14 months. We build our workflow around your CRA and Revenu Québec deadlines, so payroll and filings go out right, on time.
Serving 500+ businesses with a 98% client retention rate — a CPA-led team (Canadian & U.S. CPAs), QuickBooks Certified ProAdvisor and Xero Partner.
Verified client testimonials are being added here soon. (Placeholders shown below — no reviews are published as real until confirmed.)
[Client testimonial — to be added once real, verified client reviews are provided.]
[Client testimonial — to be added once real, verified client reviews are provided.]
[Client testimonial — to be added once real, verified client reviews are provided.]
ATS integrates seamlessly with the tools you use and trust
ATS is a QuickBooks Certified ProAdvisor and a Xero Partner. We set up, clean up, integrate and run your books on the platforms you already use — and we layer in AI-powered automation to categorise transactions, chase receipts and flag issues faster, so your numbers stay current and accurate.
A licensed CPA firm — member of the Ordre des CPA du Québec — serving Canadian businesses for over a decade. Our team includes Canadian CPAs (Ordre des CPA du Québec / CPA Canada) and US CPAs on staff — so we also handle cross-border US–Canada tax. We grew from bookkeeping and payroll roots into full-service accounting.
Your data, protected. Accounting means handling sensitive financial information. We use bank-grade encrypted cloud platforms, restrict access on a need-to-know basis, and keep every client engagement strictly confidential. Learn more about how we work → | Accounting services in Montréal →
Canada-wide service, Montreal expertise. Here are the questions we get most often.
