Thunder Bay businesses, served remotely
Accountant for Thunder Bay businesses
Thunder Bay accountant for self employed trades and practices: quarterly tax instalments, T2125 business income returns and Ontario HST.
Prepared by HBT Accounting, a CPA led firm in CalgaryUpdated 5.0 on Google, 59 reviews

Trades and practices on Lake Superior
Thunder Bay had 108,843 people in 2021, up just 0.9% from 2016, and 3,308 businesses with employees in Statistics Canada's latest count: health care first with 511, then retail (446) and construction (356).
Alongside those employers are many people who work for themselves, in the trades and in private practice. Nobody withholds tax from their income, so once the tax they owe at filing passes $3,000, the CRA expects it in quarterly instalments instead of one payment in April. The next instalment is due on December 15, 2026. HBT works from Calgary and handles Thunder Bay files remotely.
Thunder Bay in numbers
| Population, 2021 Census | 108,843 |
|---|---|
| Change since the 2016 Census | Up 0.9% |
| Size among Canadian municipalities | 51st |
| People per square kilometre | 332.1 |
| Businesses with employees | 3,308 |
| Largest sectors by employer businesses | Health care and social assistance (511); Retail trade (446); Construction (356) |
Source: Statistics Canada: Population and dwelling counts, census subdivisions, 2021 Census and Statistics Canada: Canadian Business Counts, with employees, June 2026.
What a Thunder Bay engagement covers
Instalments
Paid from the CRA's reminders or from the current year's estimate, whichever costs less.
Business income returns
The T2125, with vehicle, tool and home office claims supported.
HST registration
Registration, returns and input tax credits once revenue calls for it.

Does a self employed Thunder Bay contractor have to pay tax instalments?
Yes, if the net tax owing at filing is more than $3,000 this year and was also more than $3,000 in either of the two previous years. Instalments fall due on March 15, June 15, September 15 and December 15. Paying the amounts on the CRA's reminders avoids instalment interest, even if the year turns out busier than the last.
Starting prices are published on the fees page. Final fees depend on scope, and we quote a fixed fee once the work is clear. See starting fees. The first conversation is free and takes about 10 to 15 minutes.