Accounting Plus Financial Services
“Great accounting firm, they took care of our books and tax returns for the last 7 years.”
Best Tax Preparation Services in Thornhill, ON
24 companies listed · all 24 in Thornhill · 8 open weekends · 22 rated 4.5+
Data verified October 16, 2026
Zen Tax - Bookkeeping and Accounting
“Their bookkeeping and accounting services were simple, and I appreciated the clear guidance.”
Harmonic Accounting
“Harmonic Accounting team has been a reliable and professional support for my finances.”
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Toranj Accounting Services
“They always go the extra mile to help maximize tax savings while ensuring everything is accurate, organized, and fully compliant.”
Accountvisor Professional Corporation
“What really stood out to me was their clear communication and attention to detail—they took the time to explain things in a way I could understand and made sure I was getting the best possible outcome”
FJ Accounting & Tax Services
“I highly recommend you use the accounting services here and feel the difference🙏🏻”
The 24 companies listed for Thornhill, ON prepare personal and business tax returns for clients. Details about services and credentials come from each company's own website; ratings and quotes come from public reviews.
Area overview: Thornhill, ON
All 24 companies we list here are in Thornhill itself. The companies on this page are rated from 3.4 to 5.0 across 1,255 reviews; 10 have 50 or more reviews and 22 are rated 4.5 or higher. The topics that come up most in reviews of the companies on this page are "expertise", "patient" and "efficient". 8 are open on Saturdays and 4 on Sundays. Domain records put 11 websites of the companies on this page at ten or more years old; the oldest dates from 1999. 4 offer a free initial consultation and 1 is family- or locally-owned. We have a website on file for 23 of the companies on this page; 23 publish a contact page; 20 list a public email and 2 take bookings online. We count these figures across the companies on this page; hours and prices change, so confirm the details with the company before you book a consultation.
Are any tax preparers listed for Thornhill open on Saturdays or Sundays?
8 of the 24 companies show weekend hours. Many preparers extend their opening through the filing season and cut back once it ends, so treat weekend availability as seasonal rather than permanent. A quick call saves a wasted trip.
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Cariio Corp.
“One of the best people specifically Mrs Maryam was helping me politely and patiently.”
Parsian Accounting, Payroll, and E-File Tax Services.
“Great experience with this accounting firm since 3 years, They are professional, efficient and make the tax filing process simple and stress-free.”
Fractal Accounting
“Totally recommend this firm if you need a financial advice or have tax related hassle.”
Taraz Chartered Professional Accountants
“Taraz and his team was patiently assessed our situation and proposed best practices.”
Nan's Tax Service
“They understand taxes for personal and business thoroughly and explain your situation/process clearly.”
XYZ Accounting & Tax Services
“I have been filing my taxes with XYZ Accounting & Tax Services for 10 years now, and they have never disappointed me!”
Alpesh Joshi, CPA Cross Border Tax Consultant
“We've used Nine Cross Border Tax Consulting for several years, and they continuously exceed our expectations.”
Actax Canada Immigration Consultancy Services
“I highly recommend Actax Canada Immigration Consultancy Services (ACICS) especially Cyntia and all the staff, for their excellent service and support throughout our application process.”
Prasad & Company
“Jaskaran is incredibly knowledgeable and took the time to explain everything clearly, ensuring I understood my tax situation and options”
CTS & Associates
YSH CPA Professional Corporation 양성호 회계사
“All employees also provide accurate and professional services with friendly services that are always informed in advance in all areas.”
Siddiqi & Company
“I have dealt with Mr Siddiqi and his staff for over 15 years.”
Anklesaria CPA Professional Corporation
IQ Accounting Professionals Corp
“I have been using their service in last two years and I am extremely happy with their services.”
Master Accounting & Tax Services
“We have been using Master Accounting and Tax Services for our family tax and small business needs, and we couldn't be happier with the exceptional service provided by Mitra.”
Jacques F. Liwanpo Chartered Accountant
Taxnet Canada
“Margarita and her team save me thousands every year by guiding me to make better decisions and informing me of anything new that needs to be taken into an account”
Global Tax Services Professional Corporation
“Accounting system and software they use are very reliable, letting me not worry about data consistency and storage any longer.”
Why these companies made our list
What clients say about companies in Thornhill
- “They were kind, patient, and easy to reach, and they saved me money while getting refunds for every year I'd fallen behind on.” — client of Taraz Chartered Professional Accountants
- “They took the time to explain every aspect of the tax filing process in a way that was easy to understand, making the entire experience feel much less daunting.” — client of Harmonic Accounting
- “Had a good experience working with Justin. He was responsive, organized, and made the tax filing process smooth and stress-free.” — client of Accountvisor Professional Corporation
- “They made tax filing easy and stress-free, and I always felt supported and well taken care of.” — client of Toranj Accounting Services
- “I did my tax return with Justin. He is an amazing professional.” — client of Parsian Accounting, Payroll, and E-File Tax Services.
Excerpts from public reviews of the companies listed on this page.
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