Founded in 2006, Tonin & Co. LLP is based in Guelph, Ontario and primarily services clients across southwestern Ontario, with a growing client base internationally.

Working with local business owners and not-for-profit organizations to meet their comprehensive accounting needs is our passion. Our team of Chartered Professional Accountants (CPAs) are committed to being available and responsive to our clients at all times. Simply put, our clients’ best interests are our number one priority. At Tonin & Co, we strive to exceed expectations while ensuring our level of service is tailored to meet our individual clients’ needs.

Our expertise in long-term business management, including maximizing business value, business growth, and succession planning has been invaluable to our diverse client base. The trusted relationships with our clients are a collaborative partnership. We want to see businesses and organizations grow and thrive and approach every relationship with a team-based mentality.

We enjoy what we do, because we are more than just auditors or accountants. We take pride in building long-term relationships by helping businesses and organizations reach their goals. We also take pride in recruiting and developing our team members as they grow within our firm.

Tonin & Co. LLP is always looking for new clients. We offer complimentary initial consultations to better understand your needs and how we can be of assistance. Please feel free to contact us if you are looking for a reliable, trustworthy accountant and advisor who is always looking out for your best interests.

Please call our office at 519-822-5307 and ask to speak to Peter Tonin, Pat Brooker, or Tim Lopinski.



Our Team



Peter is a partner at Tonin & Co. with over thirty-five years of experience as a trusted business advisor. Peter has amassed a wealth of experience with entrepreneurs and not-for-profit organizations. Clients depend on his expertise, experience and creative thinking to help run their organizations, grow their businesses, and manage their wealth and succession plans.

A graduate of Wilfrid Laurier University, Peter has spent his career focusing on advisory services for business growth and profitability, succession financing, business structuring and related services. His focus on the community includes volunteer experience as Chair on various Not for Profit organizations.

Over the years he has been a mentor to our team, helping to grow both their experience and knowledge of business, finance, taxation and accounting. When Peter isn’t working, he and Laurie enjoy spending time with family and friends at his cottage as well as staying active year round through golf, cycling, kayaking and skiing.




Pat is a general practice partner at Tonin & Co. and has over thirty years of experience in accounting for businesses and not-for-profit organizations. Pat leads our team of auditors and ensures we are consistently up to date with the ever-changing accounting and assurance standards. He is a File Quality Control partner for our larger clients.

Pat graduated from Wilfrid Laurier University. In addition to his time in public practice, Pat has worked in the private sector as a business owner, which enables him to offer practical business consulting advice. He especially enjoys working with small business owner-managers.

Pat spends most of his time out of the office with his spouse, Nancy and their three sons. He enjoys spending time with his family and friends and being active. He is also an avid sports fans counting the Blue Jays, Raptors, Argonauts, Leafs and his original hometown team the Cleveland Browns as his favourite teams.




Tim is a general practice partner at Tonin & Co. and is responsible for overseeing all aspects of the firm, with a focus on taxation. Tim strives to learn the unique features of each organization to build long lasting relationships while providing practical advice to clients across a wide range of industries in both the business and not-for-profit sectors. Tim grew up in an entrepreneurial household, where from a young age, he learned the ropes doing invoicing, payroll and bookkeeping for his father’s contracting business. Tim has since carried this passion for business and accounting into his career as a CPA.

Tim graduated from Wilfrid Laurier University and has completed the CPA Canada In-Depth Taxation Course. He is responsible for ensuring the latest changes in the world of taxation are considered for all Tonin & Co’s clients.

During his spare time, Tim enjoys travelling, cooking, attending concerts and spending time with his wife Stephanie and their family. He can also be found on the ice playing hockey, or at the gym participating in group fitness “boot camp” style workouts.



Retired Partner

Joanne is a former partner of Tonin & Co. and has over thirty years of experience in accounting in both the public and private sectors.

A graduate of Wilfrid Laurier University, she specializes in accounting for not-for-profit organizations, charities, and owner-managed businesses including sole proprietorships and small corporations. Joanne also has significant experience in estate planning for individuals, including terminal returns and trust taxation.

Out of the office, Joanne enjoys spending time with her family, and loves to travel and cook.




Ashley graduated from the Accounting, Audit, and Information Technology degree program at Conestoga College and has been with Tonin & Co. LLP since she started as a co-op student in 2014.

Ashley has a breadth of experience in assisting clients with their personal and corporate tax needs in various industries. Within the firm, she implements her strong IT skills in improving our internal business processes. Ashley is currently enrolled in CPA Canada's In-Depth Tax Program to increase her specialization in all tax-related matters.

Outside of the office, Ashley loves sporty cars, cooking, hiking, lifting weights, and spending time with her husband Daniel and their furry family of a dog and two cats.




Greg enjoys working with clients across a broad spectrum of industries, including real estate and construction, professional services, manufacturing, automotive, charitable and not-for-profit organizations.

Greg graduated from Wilfrid Laurier University and completed his Diploma in Accounting there.

In his spare time, Greg enjoys playing soccer, working on his golf game and spending time with his wife, Andge.





Nancy joined the firm in October of 2019.  She comes to us with almost 30 years of experience in both the public and private sectors.

Nancy is also a certified Master Life Coach specializing in relationships and working with women.

In her spare time, she loves spending time with her husband Pat (yes that’s him at the top of the page), their three boys, family and friends.  She is a lifelong learner and enjoys being active and healthy.




Amanda joined our team in 2022. She graduated from the Accounting Co-op and Accounting Graduate Diploma Programs at the University of Guelph in 2020.

Amanda has a strong passion for Non-Profit-Organizations, she and a group of friends have started one of their own in honour of their late friend. Ultimately Amanada enjoys creating relationships with clients and always goes above and beyond to help where she can.

In her spare time, Amanda enjoys playing Slo-Pitch, reading, enjoying a pint at one of the many local craft breweries in Cambridge, and spending quality time with her partner, Kyle, and their 3 crazy cats.




We welcomed Breann to our team in 2023. Breann graduated from the University of British Columbia in 2021 with a Business Management Degree and is currently working towards completing her CPA designation.

Breann enjoys spending time outside the office with friends and family. While she enjoys travelling, she also makes the most of all weather conditions Canada has to offer! In the summer you can find her at the beach or beside the pool with a good book. And in the winter months, you can find her on the ski hills.




Brenden joined the Tonin & Co. team in 2022, coming from an accounting role in the construction industry. He has experience performing general journal reconciliations, processing payrolls, and general bookkeeping activities.

Brenden is a graduate of the University of Guelph’s Bachelor of Commerce program, with a specialization in accounting.

Outside of the office, Brenden enjoys watching hockey, playing video games and spending time with his wife, Ashley.



Isabela joined the Tonin & Co. team in 2020 and brings with her over a decade of experience in public accounting for small and medium sized businesses. She is a payroll specialist and enjoys helping our clients with payroll related questions and other accounting and tax matters.

In her spare time, Isabela enjoys lounging by the pool with her family and regatta competitions with her sister.






Melissa joined the team in 2023. She brings more than 15 years of experience in accounting with an emphasis on year-end compilations, personal & corporate tax, and bookkeeping. She graduated with a Business Administrative Accounting Diploma from Conestoga College.

In Melissa’s free time, she loves to travel, swim, have dance parties and most importantly spend time outdoors with her spouse, Jeff, and son, Jaxon.


Office Manager

Ben is a graduate of the University of Guelph, Bachelor of Commerce program, with a specialization in accounting. After growing up in and around the Tonin & Co office, Ben officially joined the team in 2022.

In Ben’s spare time, he can be found at the hockey arena, gym, or spending time with his friends and family.


Executive Assistant

We welcomed Alex to our team in 2023. She graduated from Wilfrid Laurier University in 2012 and is currently attending school at Conestoga College for Human Resource Management.

Previously Alex assisted her father in running their family’s market in Guelph for the past 10 years.

In Alex’s spare time, she enjoys travelling and spending time with her large extended family.


Financial Planning Administrator

Kelly joined Tonin & Co in March 2022 with 15 years of experience in various roles in the accounting and financial planning industry.

Kelly is in pursuit of her Financial Planning designation and has a passion for educating and supporting clients to make informed decisions as they strive to reach their goals.

In her spare time, Kelly enjoys golfing, gardening, travelling with her husband and spending time with family and friends.


Executive Assistant

Kelly joined the team in 2023. She is a graduate of the University of Guelph with a Bachelor of Arts degree, with a focus on Psychology and Family and Child Studies. Kelly has a strong passion for personal finance and building connections with those around her.

Outside of the office, Kelly enjoys cooking new recipes, adding more books to her ongoing “to-be-read list”, exploring local trails with her dog & competing in cattle shows across North America with her family.


Executive Assistant

Jenny joined our team in 2023. She comes to us with 6 years of managerial experience and a combined 3 years of internal and external bookkeeping experience. She is fluent in a variety of software including Sage, Simply Accounting, and Quickbooks.

Outside of the office Jenny is a dog mom, enjoys travelling, and is an avid collector of DC comic books, specifically Batman and Wonder Woman.



Professional Services

Through our diverse client base and valuable years of experience, we have the versatility and expertise necessary to provide our clients with the highly personalized, quality service we are known for. We take care of the numbers so you can take care of what’s most important to achieving your personal and financial goals.

Accounting and advisory services

  • • Financial statement preparation (compilation engagements)
  • • Audits and review engagements
  • • Accounting system setup and bookkeeping support
  • • Management advisory services such as operational reviews, business enhancement, strategic planning, financial projections and forecasting/budgeting, internal control reviews, and feasibility studies
  • • Risk management and disaster/crisis management

Taxation services

  • • Strategic planning for tax minimization
  • • Corporate reorganizations
  • • Estate and succession planning
  • • Support for CRA audits and appeals
  • • Structuring business startups, mergers, and acquisitions
  • • Purchase and sale of business planning
  • • Preparation of T1 – personal tax returns
  • • Preparation of T2 – corporate tax returns
  • • Excise and payroll taxes including HST and provincial sales taxes
  • • Preparation of T1044 – Not-for-Profit Information Returns
  • • Preparation of T3010 – Charity Information Returns
  • • Assistance with compliance in other statutory filing requirements
  • • Scientific Research & Development Tax Credit (SR&ED)
  • • Assistance and co-ordination with compliance in US taxation filing requirements

Succession and estate planning

  • • Exit options and transition planning – keeping the business within the family or selling to a third party
  • • Strategic business management successor planning
  • • Valuation of the business and strategic financial planning
  • • Support during the sale including collaboration with legal counsel and review of draft agreements of purchase and sale
  • • Optimizing the strategy from an overall tax perspective
  • • Personal wealth management including maintaining your retirement lifestyle
  • • Transfer financing

Business mergers, acquisitions and sales

  • • Support from before the deal closes including consulting and performance of due diligence procedures
  • • Collaboration with legal counsel including review of draft agreements of purchase and sale, shareholder agreements, etc.
  • • Financing support for the transaction
  • • Optimizing the strategy from an overall tax perspective

Business financing, venture capital, government grants

  • • Preparation of information for banks/lenders including forecasts and projections
  • • Support and guidance in obtaining financing and venture capital
  • • Review of shareholder agreements

Litigation support

  • • Matrimonial separation issues
  • • Shareholder disputes, minority dissent and oppression
  • • Breach of contract
  • • Business interruption
  • • Property expropriation
  • • Personal injury
  • • Intellectual property disputes
  • • Misrepresentations

 Privacy Policy 

Our Clients

We proudly offer our services to a diverse client base across a number of industries. While the majority of our clients are located in Southwestern Ontario, we serve a diverse range of clients internationally.

Some of the industries we specialize in are as follows:

  • • Manufacturing
  • • Wholesale and distribution
  • • Retail
  • • Hospitality
  • • Construction and real estate
  • • Auto dealerships
  • • Transportation and logistics
  • • Professional services
  • • IT systems and technology
  • • Agriculture and food industry
  • • Financial services and insurance
  • • Not-for-profit organizations and charities




Wealth Management

Ensuring your professional team is in sync with tax planning*, business planning, retirement planning, and debt management is our strength and paramount to the success of your portfolio.

At Tonin & Co. Wealth Management, our mission is to work closely with each of our clients to understand your needs and goals on a personal and a professional level. We are deeply committed to earning your trust by taking a caring and strategic approach to your investments. We will navigate the path to achieving your goals both future, and current. Simply put, our clients’ best interests are always our top priority.

Our approach is collaborative with the accountants at Tonin & Co. LLP and the licensed portfolio managers at TriCert Investment Counsel. Your Wealth Management Advisor will work with you to create a comprehensive financial plan and quarterback the implementation to secure your future. We will stay focused on this, so that you can continue to enjoy the things you love.

* Tax planning performed by Tonin & Co. LLP Chartered Professional Accountants

You have the vision. We have the focus.

Services provided by Tonin & Co. Wealth Management include:

  • • Comprehensive financial planning
  • • Portfolio management through TriCert Investment Counsel
  • • Tax planning (performed by Tonin & Co. LLP Chartered Professional Accountants)
  • • Retirement planning
  • • Estate planning
  • • Business succession planning
  • • Education planning
  • • Insurance planning
  • • Real estate planning
  • • Debt management and personal budgeting
 Wealth Management Resource Library 


*Through a referral arrangement, Tonin & Co. Wealth Management offers you direct access to TriCert Investment Counsel’s Portfolio Managers who will tailor an investment management strategy that is specific to your unique circumstances. Working with your accountant and financial planner, TriCert Investment Counsel’s Portfolio Managers take a quality sector-based (QSect™) approach to investing.

TriCert Investment Counsel is registered with the securities regulators as a Portfolio Manager and is engaged to provide clients with discretionary portfolio management.

Visit the TriCert Investment Counsel website and call us today at 519-822-5307 to help you gain the confidence and clarity for your future!





We’re always searching for the best and brightest candidates who excel in their field, and are co-operative team members ready to work with our team of professionals.

We accept resumes from co-op students and experienced professionals and keep them on file for one year.

Join us today to be part of an award-winning team:

Compensation and benefits

  • • We offer competitive compensation packages based on experience, including health benefits and group RRSPs
  • • We offer a flexible work schedule that allows team members to achieve a work-life balance
  • • Coaching and support
  • • We provide ongoing coaching and support for professional development and growth of our team members
  • • Community involvement
  • • We are supporters of numerous charitable organizations in our community and encourage staff to get involved with these organizations

If you’re interested in joining our team, please e-mail your resume to general@tonin.ca – only those applicants selected for an interview will be contacted.

Roles we are currently hiring for:

  • • Manager – Accounting and Tax - click here to view posting.
  • • Senior Accountant - click here to view posting.




We encourage you to contact us with any questions you have about your needs and our services.

Tonin & Co. LLP
350 Speedvale Avenue West, Suite 6
Guelph, Ontario N1H 7M7
Monday-Friday 8:30am-5:00pm
Tel: 519.822.5307
Fax: 519.822.3153

Please email general@tonin.ca for any inquiries.