An Ottawa accountant for businesses that invoice across the river.
Ottawa businesses sell into Quebec more often than businesses anywhere else in Ontario, and Quebec is a second sales tax regime rather than a rounding difference. We work with Ottawa clients remotely from Thornhill.


Ontario rules, with Quebec ten minutes away.
An Ottawa corporation files as an Ontario corporation. Its customers are what complicate the year.
HST at home, QST across the river
Selling into Quebec can require registration for QST, which Revenu Quebec administers and which is filed separately from anything the CRA ever sees.
One dominant client is a tax question
If most of your income comes from a single client and the working relationship would otherwise look like employment, the personal service business rules apply. They are expensive to discover late.
Exempt revenue changes what you claim
Where part of what you sell is exempt from sales tax and part is taxable, only some of the GST/HST you pay comes back. The split has to be worked out rather than assumed.
The businesses that bill on contract.
Incorporated consultants
Professionals billing on contract, where the corporate position and the personal return have to be planned as one.
Businesses selling into Quebec
Companies whose customer list crosses the provincial line, and whose sales tax registration has to follow it.
Clinics and health practices
Practices with a mix of exempt and taxable revenue, which decides what can be recovered.
The ones we get asked most.
Can an Ontario accountant handle my Quebec sales tax?
Yes. QST registration and filing runs through Revenu Quebec, and it is handled alongside your GST/HST rather than instead of it.
Do you work with Ottawa clients remotely?
Yes, and nearly all of it is. Shared bookkeeping access, email, video calls and CRA authorization so we can deal with the agency directly.
I contract to one federal department. Should I be worried?
It is worth a conversation. The personal service business rules turn on how the relationship actually works, and the cost of being offside is high enough to check rather than assume.
Is there a minimum size of business you take on?
No fixed floor. The question is whether year-round planning would actually change anything for you, and that is a short conversation rather than a revenue test.
We also work with businesses in these cities.
Services in Ottawa
Licensed, certified, and accountable for it.
The bodies that license this practice, and the certifications behind the day-to-day work.
CPA Ontario
The provincial body that regulates Chartered Professional Accountants in Ontario.
EFILE certified
Certified by the Canada Revenue Agency to file returns electronically on behalf of clients.
Intuit ProAdvisor
Intuit certification covering QuickBooks Online setup, reconciliation and reporting.
QuickBooks Payroll
Intuit certification for running payroll, deductions and remittances inside QuickBooks.
In their words.
Aaron has done my personal taxes for six years and he’s the best. My files are sometimes complicated and I was not always the most organized client, yet he handles all of it without ever making me feel bad about the mess. He’s fast, he explains everything in plain English, and he always finds credits I would have missed.Shmuel Neft
Working with Aaron and his team, especially Anna, has been fantastic for both our camp operations and Prime Coat Painters. From complex contractor billings to seasonal accounts and corporate taxes, they handle everything with real attention to detail. If you need a reliable, top-tier accounting team for your business, I can’t recommend Aaron Herman CPA highly enough!Tzadi Zlotnick, Prime Coat Painters Inc.
I use him for personal and business accounting. He is absolutely phenomenal with his work and expertise. Thorough, reliable, dependable, and punctual with due dates. I’ve worked with many accountants previously and Aaron surpassed them all in everything on my list.Elior Zipori, Zipori Landscapes & Design
We have been using Aaron Herman CPA for about four years now and we are very happy with their services. Anna is especially great to work with. She is on the ball, always up to date, and gets back to you right away with any questions or concerns.Reuven Durbach
Very happy with Aaron’s service. He is very knowledgeable and professional. Very patient with all my questions, ready to answer and be with the client within a short period of time. All the accounting service is done in a timely manner.Artem Artemov, Rimland
Aaron is excellent! He responds quickly, explains everything clearly, and makes the whole tax process easy and stress-free. He is very knowledgeable and always helps find the best way to get everything done properly.Mai Edry
Aaron is an amazing accountant! He is very supportive and great at explaining the ins and outs of what was needed when expanding my business. I highly recommend Aaron and his team!Leah Lomiansky, Speech Volumes Therapy
He is knowledgeable, thorough and effective. He is very responsive and takes great care of his clients. I highly recommend him and his services!Rachel Danzinger, Learning Pods
Absolutely love Aaron and Anna. They are fantastic to work with, go above and beyond, and their communication and dedication is unsurpassed.Fat Cat Cookie Co.
Two people. Trusted with your year.

Aaron Herman
CPA, CA · Founder and Managing Partner
Aaron planned and prepared tax in public practice, then led financial reporting inside large Canadian companies. He is the person who answers when you call.
My number one priority is a happy client.

Anna Herman
Director of Finance and Operations
Anna runs the machinery behind the work: cloud accounting, CRA compliance, payroll and client onboarding. If your year-end is uneventful, that is Anna.
Order creates opportunity.
Tell us where your year stands.
Send the form and Aaron will come back to you directly. If it is easier, call. Someone here answers.