A fixed-fee CPA for St. Catharines and Niagara businesses
St. Catharines sits between Lake Ontario and the Niagara Escarpment, with the Welland Canal cutting through it and vineyards, orchards and greenhouses on every side. EverStone CPA is a Chartered Professional Accountant firm serving St. Catharines remotely: corporate tax, personal tax, bookkeeping and payroll, at a fee fixed in writing before any work starts.
Who we help here: wineries and grape growers, tender-fruit and greenhouse farms, restaurants and tourism operators, construction contractors and manufacturers, in St. Catharines and across Niagara Falls, Welland, Niagara-on-the-Lake, Lincoln and the rest of the Niagara Region.
Quick answer: EverStone works with St. Catharines owners entirely online from Abbotsford, BC. One CPA handles the corporate T2, the owner’s T1, the monthly books, 13% HST and payroll, including Ontario employer health tax and WSIB. Fees are fixed after a free consultation, and published starting prices sit on the pricing page. Published fees start at $100 for a personal return and $300 a month for bookkeeping.
One CPA for the whole Niagara file
Most owner-managed businesses in the region need the same handful of things done well, every year, by someone who remembers last year. EverStone keeps all of it with one Chartered Professional Accountant, so the person who codes your HST in March is the person who prepares the corporate return in the autumn.
- Monthly bookkeeping in St. Catharines: bank and card reconciliations, HST coding and a ledger that closes every month.
- Corporate tax for St. Catharines companies: the T2, year-end statements and the Ontario registry return.
- Personal tax in St. Catharines: T1 returns for owners, families, landlords and retirees.
- Payroll for St. Catharines employers: source deductions, T4s, records of employment, employer health tax and WSIB.
The Ontario rules a Niagara business works under
Ontario harmonised its sales tax with the GST, so a St. Catharines business charges a single 13% HST, files one return and recovers the tax it pays on inputs through input tax credits. Corporate income tax works the same way: the CRA administers Ontario’s layer, so one T2 carries both.
Three provincial obligations sit outside that federal system. The Ontario annual return is filed through the Ontario Business Registry within six months of year-end, and nobody at the CRA will remind you. Employer health tax applies once Ontario payroll passes its exemption. WSIB coverage is a separate registration with its own premiums and clearance certificates. Current rates and thresholds, each with its source, are kept on the Ontario tax facts page.
The industries that shape the region
Niagara’s economy is not an office economy, and the accounting follows the work. Each of these has a page of its own:
- Wineries: a CRA licence under the Excise Act, 2001, wine that ages for years before it sells, and a tasting room that is really a retail store.
- Farms and greenhouses: tender fruit, grapes and greenhouse crops, the cash method, zero-rated sales and seasonal crews.
- Restaurants and tourism: a summer that carries the year, tips on payroll and a point-of-sale system that has to agree with the bank.
- Construction contractors: the 10% holdback, progress billing, T5018 slips and WSIB.
- Manufacturers: inventory, job costing, equipment and SR&ED claims on process work.
A seasonal economy, and what it does to the books
Very little in Niagara earns evenly across twelve months. Tourism peaks in summer around the Falls and Niagara-on-the-Lake. Fruit comes off the trees from midsummer into autumn, grapes follow, and icewine is picked in the cold of winter. Construction slows when the ground freezes.
That shape matters for tax. Instalments set on last year’s total can be too high after a wet season and too low after a strong one. An HST return filed annually can land at the worst point in the cash cycle. Payroll can double in June and halve in October. A business that closes its books only once a year sees none of this until the corporate return is already late in the planning, when the choices that would have helped have already passed. We plan around the pattern your business actually has, using the instalment calculator and a cash forecast rather than a flat projection. Managing cash in a seasonal business covers the approach.
What it costs, published before you ask
Every fee is fixed in writing before work begins, and the starting points are public. A personal return starts at $100 and a self-employed T1 with schedules commonly runs $250–$450 depending on what the schedules carry. Monthly bookkeeping starts at $300 a month with GST/HST filing included. A typical trades corporation bundle of bookkeeping, payroll and the year-end T2 with statements usually runs $450–$650 a month. A corporate return on its own is quoted after a free consultation.
For businesses that need more than compliance, a fractional controller starts at $1,500 a month and a fractional CFO at $2,500 a month. If you only need one decision talked through, the 45-minute Advice Call is a flat $200 + GST.
Moving your file from another accountant
Switching is less work than most owners expect. You authorise EverStone through CRA’s Represent a Client from your business account, which lets us see filings, balances and notices directly. Prior returns and working papers come across by secure upload link, and we check the last filed return so opening balances are right before anything new is prepared. The handover runs in the background while you keep working, and the first year with us is usually the one where the recurring items get set up properly: the HST filing period, the payroll remittance schedule and the registry date. See how switching accountants works and working with a CPA in another province. To keep the dates in front of you, sign up for deadline reminders.
Prepared and reviewed by a Chartered Professional Accountant at EverStone CPA, an Abbotsford CPA firm working with small businesses and incorporated contractors across the Fraser Valley and Canada. Updated September 2026. About the firm · Book a free consult
Which return applies to you
| If you are | You file |
|---|---|
| A sole proprietor | A T1 personal return with form T2125 for the business |
| An incorporated business | A T2 corporate return with financial statement schedules, plus the Ontario annual return |
| A farm or vineyard | Farming income on the T1 or T2, where the cash method is available |
| An employer | Source deduction remittances, T4 slips, and employer health tax where it applies |
| Sales tax where you operate | 13% HST, a single registration and a single return |
Source: When incorporating starts to pay. General information, not advice.
Questions from St. Catharines business owners
How much does an accountant cost in St. Catharines?+
Can an accountant in BC file my Ontario corporate return?+
Do you work with businesses outside St. Catharines itself?+
When is the Ontario annual return due?+
Does the three-hour time difference cause problems?+
When does my business have to register for HST?+
Related services and local guides
Nearby cities, the rest of what we do for St. Catharines businesses, and the reference pages behind this one.
Running a business in Niagara?
One CPA for corporate tax, HST, payroll and the books. Fixed fee, fully online. Book a free consult.
Remote accounting from Abbotsford
EverStone is a sole practitioner CPA firm at 32615 South Fraser Way in Abbotsford, serving St. Catharines clients entirely online. There is no St. Catharines office and no local staff. Meetings are held by video or phone, documents are exchanged by secure upload link and e-signature, and no visit is required at any point. The person who answers your question in July is the one who prepared the return in the spring.
Talk to a CPA about this
One Chartered Professional Accountant, start to finish. Fixed fees, quoted in writing before any work begins, and no obligation from a first conversation.