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To future-proof accounting in Canada, plan for two things you can count on: rates will change, and your records have to stay readable for six years. Everything else, from software choice to month-end routines, is judgement. Rates and formats are where a setup made today quietly breaks in two years.
Will your records still open in six years?
That’s the first test, and it’s more practical than it sounds. The CRA says electronic records have to be kept in an electronically readable form for the whole retention period, even when you also have a paper copy. Its retention rule is six years from the end of the last tax year a record relates to.
So ask a dull question of every tool you use. If this subscription ended tomorrow, could you export the ledger, the payroll history and the sales data in a format you can open without the vendor? If the answer is no, fix that before you fix anything clever.
The CRA also encourages a backup at a different location within Canada, and it expects records kept at your Canadian home or business unless it agrees otherwise. Put the export on a schedule. Once a year, after the return is filed, is enough for most small businesses.
Which rates should never be typed into a formula?
All of them. Tax rates, limits and thresholds move, and a spreadsheet with 13% hard-coded in forty cells is the classic trap. Here are the ones a small business meets most often.
| Item | Figure we confirmed |
|---|---|
| Federal small business rate | 9% on the first $500,000 of active business income |
| Federal general corporate rate | 15% |
| HST, Ontario | 13% |
| HST, New Brunswick, Newfoundland and Labrador, PEI | 15% |
| HST, Nova Scotia | 14%, down from 15% on 1 April 2025 |
| GST only (Alberta, Yukon, Northwest Territories, Nunavut) | 5% |
Nova Scotia shows why this matters. A system set up before April 2025 was charging the wrong tax unless somebody changed it. Ontario is the next example. Its small business rate was set to fall from 3.2% to 2.2% from 1 July 2026, which means a corporation with a calendar year-end straddles the change. The blended rate the corporate tax calculator uses for 2026 is our own arithmetic by days, not a published figure, so treat it as an estimate.
What does future-proof accounting mean for payroll?
It grows faster than you’d guess, because the employer adds CPP and EI on top of pay. With the payroll remittance calculator, ten employees in Ontario each paid $2,500 every two weeks mean $7,533.38 to remit to the CRA each pay period. The full cost of that payroll is $26,977.90 per period, against $25,000 in gross pay.
The calculator leaves out workers compensation and other levies, so your real figure is higher. Still, the point stands. Model the next hire before you make the offer, and keep a cash cushion for the remittance date.
What should a small business do this year?
A short list beats a strategy document.
- Export your books and payroll history once and open the files to check they work.
- Keep every rate in one settings table, with the date you checked it.
- If you run a corporation, file the T2 electronically. It’s required for tax years starting after 2023, and the CRA charges $1,000 when a required return isn’t filed that way.
- Run the tax instalments calculator after a good quarter, before the bill arrives.
We haven’t listed 2026 filing deadlines. We couldn’t find them published, so read the CRA page for your return before you rely on a date.
Where the numbers come from
Corporate rates are from the CRA’s corporation tax rates page, the small business limit from the T2 guide, and sales tax rates from the CRA’s rates table, all read in September 2026. The Ontario 2026 blend is derived by this site. Record rules are from CRA guide RC188 and its electronic records guidance. This site isn’t connected with the CRA or any government.
Frequently asked questions
How long should I keep accounting records in Canada?
Six years from the end of the last tax year a record relates to, unless the CRA has agreed to earlier destruction.
Do electronic records need to stay readable?
Yes. The CRA says electronic records must be kept in an electronically readable form for the retention period, even if a paper copy exists.
Where should backups be kept?
The CRA encourages a backup at another location in Canada, in case of fire, flood, theft or other loss.
Has the Nova Scotia HST rate changed?
Our rates table shows 14%, down from 15% on 1 April 2025. Check the CRA rates table before you change a system setting.
Must a corporation file its T2 online?
For tax years starting after 2023 it must, apart from listed exceptions. A required return filed another way brings a $1,000 CRA penalty.
All family and benefits calculators
- Self-employed taxes in Canada: income, CPP and GST
How tax works when you are self-employed in Canada: reporting income and expenses, paying both halves of CPP, instalments and when to register for GST
Information only. This page is general information, not tax, legal or accounting advice. Tax-Services.ca is an independent publisher: we don't prepare or file tax returns or offer tax services, and we have no connection with the CRA, Revenu Québec, any government or any company named on this page. Check the figures that matter with an official source or a qualified professional.