Welcome to CIS Income Tax and Accounting Services. Niagara’s trusted tax experts since 1981.

We are open and in office Monday to Friday. Tax filing is available year round on a drop-off only basis or via email – please include completed Drop Off and Authorization Forms.

The Drop-Off sheet is fillable only with Adobe or can be filled in manually after printing. Once completed, please drop off, post, or email your documents to us. 


 Get on the spot refunds with CIS Fast Cash Refund®

 Visit our tax tips page to learn about current tax credits, exemptions and programs.


Accounting Services

Year round accounting services for businesses throughout the Niagara Region, Halton and the GTA. Small business and corporate tax returns. Let us do your HST filing and payroll so you can concentrate on your success!

US and Canadian tax filing image

US Tax Returns & US Gambling Tax Recovery

We prepare Canadian and US income tax returns and specialize in recovering taxes paid on US gambling wins. Don’t let the IRS keep your winnings, come and see us and we’ll get your money back for you.