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Established in 2016, Cat May CPA Professional Corporation is a full-service accounting firm that operates remotely or by appointment in Simcoe County. Our services range in complexity. You may simply need support for ongoing accounting, payroll and tax filing. We also have the expertise to guide you through various special projects.  

At Cat May CPA, we take the time to understand your unique business and offer creative solutions to achieve your goals. Once your records are caught up and processes are optimized, we can train you and your staff. If your business is too small to require regular admin staff, then we can operate as your virtual finance department.

Google business reviews

Cat and her team have been a great help to my business. While great at tech, accounting and taxes are not my strong suit. Cat made me feel... read more

Sheldon Purkiss Avatar Sheldon Purkiss
September 28, 2020

We have relied on Catherine to help keep our business running smoothly since its beginning, and have never been disappointed. She has always been available to answer any questions and... read more

Dan Leblanc Avatar Dan Leblanc
September 3, 2019

Our Services

We customize our services to meet the unique needs of:
  • Business owners including corporations, sole proprietorships, partnerships and rental property owners. 
  • Charities and non-profit organizations

Business Owners

Cat May CPA Professional Corporation is a boutique accounting firm. We know small businesses and can help with yours. Whether you need one-time help or all of the benefits of ongoing support services, we have a solution for your business.

Ongoing Support Services:

Get your business caught up to date and sign up for ongoing support for any combination of the following services:

  Tax Return Preparation

  Annual and interim financial statements preparation

  Computerized bookkeeping on a monthly, quarterly or annual basis

  HST, WSIB and payroll tax compliance

  T4 and T5 preparation and filing

  Advisory services

  Referrals to a network of trusted professionals

Special projects:

*Expansion*     *Increasing Profitability*     *Start ups*     *Incorporating* 

Sometimes you need an expert. Cat May CPA Professional Corporation can provide that expertise when you need it most:

  Help with incorporation

 Identifying controls to keep your money safe

  Preparing business plans, cash flow projections and budgets

  Applying for new financing

  Advice for new business owners

  Risk and opportunity assessment during important business decisions

  Resolution of complex issues

Services for Non-Profits and Charities

Cat May CPA Professional Corporation is a boutique accounting firm. We are involved in our communities and understand the unique needs of our local non-profit organizations. Your teams are passionate and work hard to raise donations and advocate for funding.  Let us help you to make the best use of those funds.

We can package any combination of the following services to meet your business needs:

  Registered Charity Information Return preparation and filing

  Annual and interim financial statements and special reports for funding compliance

  Computerized bookkeeping on a monthly, quarterly or annual basis

  HST, WSIB, PSB and payroll tax compliance

  Advisory services

  Referral to a network of trusted professionals

Special projects:

  Reporting to funders 

  Support during staff turnover

  Training finance staff

  Fraud risk assessment

  Business plans and cash flow projections

About US

Established in 2016, Cat May CPA Professional Corporation is a full-service accounting firm that operates remotely or by appointment in Simcoe County.

Cat Bristow CPA, CA


Cat grew up in Orillia, ON and decided to start her own business serving the community she knew so well. You may have run into her at local Chamber or Rotary Club events. Cat has served as an accountant for 10 years since graduating from Laurentian University. She continues to learn through the experiences of each small business owner that she helps. She is passionate about solving business issues so owners can thrive. During winters, you can find her and her husband snowboarding at the local hill. Summer vacations are most often spent camping with friends. 

Ashton Corbeil

Senior Accountant

Ashton discovered a passion for accounting while bookkeeping for her family business. This experience led her to obtain an Advanced Diploma in Business Accounting with Honours from Georgian College.  While gaining further practical experience, she continued to advance her education part-time towards a Degree in Business Administration from Laurentian University. Ashton has a bright future and is already an asset to the team. As well as keeping busy with work and studies, Ashton is the mother of a busy toddler.  Her family enjoys the outdoors, including ice skating, fishing and visits to the cottage. 


Can I afford to hire an accounting firm?

We are an affordable option that allows you to focus on other aspects of your operation. 

For many businesses, we are a great alternative to hosting your own in-house accounting department. The valuable perspective you gain from keeping monthly records allows you to make better management decisions and to take advantage of government programs more quickly. If you operate in a competitive industry, the quality of your bookkeeping data could be your competitive advantage. Detailed records may show you where your costs are piling up, which goods/services need price increases to stay profitable, or what would happen if you expanded your business. We love using data to reduce the risk from your business plans.

At a minimum, you need to file personal or corporate taxes for your business. For this reason, many people only look at their finances once a year. You should consider the opportunity cost of not analyzing current records on your performance. How much is being left on the table by following your status quo? 

I’m worried about fraud. Can you help?

Unfortunately, fraud is as much of a concern in a small town, as it is anywhere else. Luckily, there are several steps you can take to prevent, mitigate, or investigate a suspicion of fraud. We can review your financial procedures and recommend controls to keep your money safe. A brief discussion on how your financial information and bank accounts operate may be all it takes to identify and correct for the most common red flags. 

Please consider these common scenarios that leave businesses vulnerable:

  • accounting records are completed by a single employee with little to no supervision

  • employees have access to online banking and have rights to set up new payees

  • cheques that clear the bank are not reviewed by anyone other than the employee who has rights to print cheques

  • employees hold company credit cards that are not reviewed before monthly payments are made

  • office paperwork is untidy, not readily available, or only provided as reproductions (versus originals)


Please leave us a note. We'll get back to you within one business day.

Photos courtesy of our friends at Dark Roast Communications