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Chartered Public Accountants and Personal Tax Experts

Whether you are Americans living in Canada or Canadians living or owning rental property and business in the US, we offer our services to all!

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“By the work, one knows the workman.” – Jean de la Fontaine (1621 ‑ 1695)

Welcome to Gregory D. Garant, CPA for Financial Services in Windsor

Gregory D. Garant, CPA has been providing a wide range of financial services in Windsor, including accounting, taxation, auditing and business advisory services to Canadian and American clients throughout the US and Canada since 1989. We are a team of five full-time individuals, all of whom are familiar with Canadian and US tax preparation.


Our focus is on assisting individuals and small to medium-sized corporations, helping to maximize their profits while minimizing their income taxes.

Our services include:


    Canadian income tax preparation

    US income tax preparation

    Accounting and auditing services

            - Financial statements

    Bookkeeping services

    Business advisory

            - Start-up

            - Projected cash flow statements

            - Financial assistance

     Corporate income tax

Extended Hours and Flexible Methods of Filing

In recognition of the busy and varying schedules of our clientele, we offer both extended hours and alternative methods of filing.

Extended Hours


8:00 AM to 5:00 PM. Monday to Friday, with evening and weekend appointments available


    Tax season (February – April)

8:00 AM to 8:00 PM, Monday to Friday
9:00 AM to 5:00 PM, Saturday

Alternate Methods of Filing

Since face to face appointments are not always convenient or possible, we offer email and tax-by-fax options.

Our Clients

Gregory D. Garant serves a wide array of personal and corporate clients in the US and Canada seeking accounting, auditing, bookkeeping, income tax preparation, business advisory and more. Whether you are a US citizen working in Canada, a Canadian Citizen working in the US, a business owner from the US who own businesses in Canada, or a Canadian who owns businesses in the US, our team at Gregory D. Garant can always help you with our financial services. Give us a call today to know more.

Effective Tax Strategies

With our effective tax strategies, you get the following benefits:


  • Get IRS credits such as Earned Income Tax Credit, Saver’s Credit and more to reduce tax.

  • Shoot for long-term capital gains such as investing in mutual funds, bonds, real estate.

  • Buy municipal bonds to receive your original investment as the bond reaches maturity date.

  • Create additional income, such as start a business to reduce tax on utilities, internet and much more.

  • Maximize your tax deduction by collecting, recording and filing receipts for all your purchases that are or may be business-related.


We are located one block from the Detroit River, between Janette and Caron Avenues, in Windsor, Ontario.


Free parking is conveniently available.

Personal Income Tax Filing

We assist you in filing your income tax and getting the best results.

Are You a Canadian With Business in the US?

We can help you with financial statements. Contact us for more information.

Contact Us

Gregory D. Garant

631 Pitt St W

Windsor, Ontario N9A 5M5





Opening Hours

Monday - Thursday 08:00 AM - 07:00 PM

Friday 08:00 AM - 06:00 PM

Saturday 10:00 AM - 05:00 PM

Sunday Closed

Service Area

Based in Windsor;

we have clients from across the US and Canada.


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