Updated Checked by the Tax-Services.ca editorial team How we check
For most Canadian small businesses, off-the-shelf accounting software is the sensible default, and custom software only makes sense when a real process can’t be bent to fit a packaged tool. Whichever you pick, the CRA rules on records are the same: six years of retention, and files that can be read by CRA software when an officer asks.
What does the choice really come down to?
Packaged software gets you started this week. Custom software gets you exactly what you specify, after you’ve specified it, paid for it and tested it. We couldn’t confirm any prices or build times for either route, because they vary by supplier and by scope. So this page sticks to the questions you can answer yourself.
Start with a blunt one. Can you describe, in a page, something your bookkeeping must do that a standard tool can’t? If you can’t, buy the standard tool. If you can, check whether a plug-in or a spreadsheet import solves it before you commission a build.
Which questions should you ask before choosing accounting software?
Use the table as a checklist for any package or any developer quote. The right column says why each one matters.
| Question | Why it matters |
|---|---|
| Can I export all my data in a readable format? | The CRA may ask for electronic records readable by its own software |
| Where is the data stored? | Electronic records held outside Canada need written CRA permission |
| Can I keep six years of history? | The general retention period is six years from the end of the last tax year |
| Does it handle GST/HST and payroll correctly? | A wrong figure in either costs you time to fix |
| Who fixes it when the tax rates change? | Custom builds need an owner for updates |
| What happens if the supplier disappears? | Your records must stay reachable |
How can you test accounting software before you commit?
Run a case where you already know the answer. Take a $500 sale in Ontario. HST at 13% is $65.00 and the total is $565.00, which the GST/HST calculator confirms. Enter the same sale in a trial file. If the software shows anything else, find out why before you trust it with a year of invoices.
Do the same for payroll. The payroll remittance calculator splits what you hold back from an employee from what you add as employer, and it gave us $961.03 to remit for one employee on its sample settings. A package that lands close to that figure on the same inputs is at least reading the rules correctly. A big gap means either different inputs or a problem.
Finally, check the income side. The corporate tax calculator shows $11,696 of tax on $100,000 of Ontario small-business income for calendar 2026, using a prorated rate blend. Your year-end tax estimate in any software should be in that neighbourhood for the same facts. If it isn’t, one of you is wrong.
When does custom software make sense?
Rarely, and mostly when you have unusual volume, unusual billing or a system you must connect to. It gives you control. It also gives you a maintenance bill and a single point of failure, because someone has to update tax rates each year, and rates move. If the developer leaves, your accounting leaves too.
A middle route is common: packaged software for the books, plus a small custom tool for the odd task that feeds it. That keeps the tax logic in a product that other people also test.
Mistakes and limits to watch
Picking on price alone is the usual one, and it goes wrong in both directions, since a cheap package can cost you hours every month and an expensive build can sit half used. Yes, really. So is skipping the exit test: before you sign, export a full set of records and open them in a spreadsheet. Another is trusting a demo. Demos use tidy data, and your books aren’t tidy.
Don’t scan your paper receipts and shred the originals until you’ve read the CRA’s conditions for keeping electronic copies instead. And remember that a package doesn’t file your return or make judgement calls for you. It records what you enter. Our calculators cover set cases, so treat every figure on this page as a check and not a filing.
We didn’t rate or rank any product, and we can’t say which one suits your firm.
Where do these rules come from?
The record retention, location and format rules come from CRA record-keeping pages, read in September 2026. The tax figures come from our own calculators, which use published federal and provincial data. The Ontario small-business rate for 2026 is a prorated blend, so treat it as an estimate. This website has no connection with the CRA or any government body.
Frequently asked questions
Is off-the-shelf accounting software good enough for a small business?
For most, yes. Custom only pays off when a real process can't be handled by a standard package or an add-on.
Does the CRA accept electronic accounting records?
Yes, if they can be read by CRA software and give enough detail for your returns. You keep them for six years in general.
Can my accounting data sit on a foreign server?
Only with written CRA permission for electronic records held outside Canada. Ask any provider where the data is stored.
How do I test a package before buying?
Enter a case you can check, like a $500 Ontario sale that should show $65.00 of HST, and compare against a calculator.
What should I do if I switch systems?
Export everything first and confirm you can open it. Six years of records must stay reachable.
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.