"Master Accounting & Tax Services" is designed to help you make informed financial decisions.
“Master Accounting & Tax Services” is a Canadian accounting firm located in Thornhill, Ontario, providing dependable, practical accounting and tax services to individuals and businesses across Canada, with a primary focus on clients throughout Ontario. We work with clients in all industries, with deep specialization in construction and contracting, where accurate reporting and regulatory compliance are critical.
The firm is owned and led by Mitra Montazer-Saheb, an experienced accounting professional with over 25 years of experience in accounting, tax preparation, and financial compliance. With decades of hands-on expertise, we understand the challenges business owners face and deliver solutions that are clear, efficient, and tailored to each client’s needs.
At Master Accounting, we believe in building long-term relationships through:
From QuickBooks Online bookkeeping and payroll to WSIB reporting, T5018 subcontractor filing, and tax compliance, we help businesses stay organized, compliant, and financially confident—so they can focus on growth.
Your business. Your industry. Your numbers—handled with experience and care
With over two decades of industry experience, we have the expertise and knowledge to help you achieve your financial goals.
Committed to 100% customer satisfaction with every service we provide.
Serving all clients with reliable accounting and tax solutions
Take the first step toward accurate accounting, seamless bookkeeping, and stress-free tax management—partner with us now!
Call us right now
We believe in honest, transparent accounting. Our clients can trust that their financial information is handled with accuracy, confidentiality, and care.
With over 25 years of accounting and tax experience, we apply proven knowledge and real-world insight to every client engagement.
We understand that every industry is different. Our specialized expertise in construction and contracting allows us to address complex requirements such as WSIB reporting, T5018 filings, and project-based accounting.
We take the time to understand each client’s business and goals. Our solutions are tailored—not generic—so you receive advice that actually works for you.
We believe accounting should be understandable. We explain the numbers clearly and keep you informed, so you can make confident business decisions.
We provide tailored accounting and tax services that fit your unique business needs, ensuring every solution is as individual as your goals.
With more than 25 years of expertise, we provide reliable, accurate, and personalized accounting and tax services that help businesses grow and stay compliant.
Specialized accounting and bookkeeping services tailored for the construction industry, helping you manage projects, track costs, and stay compliant with industry regulations.
Providing reliable accounting, bookkeeping, and tax solutions across Canada, ensuring businesses from coast to coast stay organized, compliant, and financially healthy.
Our certified QuickBooks Online experts provide setup, training, and ongoing support to help your business manage finances efficiently and accurately.
We help businesses stay compliant with WSIB regulations and T5018 reporting requirements, ensuring accurate submissions and reducing risk of penalties.
Our team is made up of highly skilled accounting and tax professionals who are passionate about helping your business thrive. With years of experience, deep industry knowledge, and a commitment to integrity, we go beyond standard services to provide personalized solutions, expert advice, and peace of mind for every client.
