Updated Checked by the Tax-Services.ca editorial team How we check
The tax implications for tech startups in Canada mostly come down to two numbers: the corporate rate on your profit, and the SR&ED credit on your research spending. A Canadian-controlled private corporation pays 9% federal tax on the first $500,000 of active business income, and can earn a refundable 35% credit on up to $6 million of qualifying SR&ED spending. Both have conditions, and most of this page is about them.
What rate does a tech startup pay on profit?
Most startups lose money at first, so this matters later than founders think. When you do turn a profit, the rate depends on being a CCPC or not. The CRA’s corporation tax rates page lists a 15% federal general rate, and 9% for a CCPC using the small business deduction. Provinces add their own share. Ontario’s CRA page shows 3.2% and 11.5% with a $500,000 limit, and a cut of the lower rate to 2.2% from July 1, 2026.
| Item | Rate or limit |
|---|---|
| Federal general rate | 15% |
| Federal small business rate (CCPC) | 9% on the first $500,000 |
| Ontario, combined small business, calendar 2026 | About 11.7% (blend, derived) |
| Ontario, combined general | 26.5% |
That 11.7% is our own blend of the old and new Ontario rates over a calendar year, not a figure the CRA prints. A company with a different year end lands elsewhere. Full-year rates from 2027 haven’t been confirmed, so check the CRA’s Ontario page before you plan around them.
How does the small business limit work when you have investors?
The $500,000 limit is shared among associated corporations, and it shrinks when taxable capital is between $10 million and $50 million. It also falls when passive investment income passes $50,000. Most early startups sit far below all of that, but a group of related companies can catch you out. Only CCPCs qualify at all, and who controls the company decides that. Get that checked before you raise money, not after.
Try the corporate tax calculator with your numbers. For $100,000 of active income in Ontario for a calendar 2026 year, it shows $11,696 of corporate tax, and $88,304 left in the company. At $300,000 the tax is $35,088. At $600,000 it’s $84,980, or 14.2% on average, because the top $100,000 is taxed at the higher rate. The tool leaves out the taxable capital phase-out above and covers associated companies through an optional box.
Is the SR&ED credit worth chasing?
For many software companies, yes. SR&ED, the Scientific Research and Experimental Development program, gives a tax credit on qualifying work. A CCPC can earn a refundable credit at 35% on qualifying spending up to its expenditure limit. The CRA says the limit for the enhanced 35% credit rose from $3 million to $6 million, for tax years starting after December 15, 2024. Spending above it earns 15%. The limit phases out as the company’s prior-year taxable capital climbs from $15 million to $75 million, which is a range most startups never see.
Here’s what that looks like. With $200,000 of qualifying spending and full eligibility, 35% is $70,000. With $7 million, you’d earn $2.1 million on the first $6 million and $150,000 on the last million. Those are simple sums and a ballpark at best, not a promise. Whether a project counts as SR&ED is a technical question about uncertainty and systematic investigation, so read the CRA’s SR&ED pages before you assume your product roadmap qualifies.
For a small team, the practical side matters more than the percentage. If two developers in Waterloo spend half their year on a genuinely hard technical problem, you want timesheets, notes on what failed and why, and payroll records that tie their pay to that work. Without those, a good claim turns into a weak one.
Should you start as a sole proprietor or a corporation?
The comparison isn’t like for like. A sole proprietor at $100,000 of net income in Ontario pays $19,045 of income tax and $9,293 of CPP, per our self-employed tax calculator, so $28,338 in all. The corporation above paid $11,696 on the same profit, but the $88,304 left inside isn’t yours yet. Taking it out triggers more tax, which you can estimate with the dividend tax calculator. If you plan to reinvest for years, a corporation can defer tax.
If you expect to live on the money from month one, the gap shrinks fast. A corporation is worth the extra paperwork when profit stays in the company: for hiring, for servers and for the runway you’ll need before the next round.
What do founders get wrong?
They assume a loss means nothing to file. Corporations still file returns. They forget payroll: once you pay yourself or a hire, you owe source deductions, and the payroll remittance calculator shows the amounts. And they apply for SR&ED late, or with weak records. The claim deadline wasn’t something we confirmed here, so look it up on the CRA site early in the year.
Equity plans, stock option taxes and provincial startup credits are left out on purpose, because none of them was verified for this page. GST/HST registration thresholds weren’t confirmed either.
What should a founder do first?
Open a separate business bank account the day you incorporate. Keep every receipt. Check with a lawyer or accountant who knows CCPC rules before any investor signs, since who controls the company decides the rate. Then set a calendar reminder for the corporate return, due six months after year end, even in a year with no revenue.
Sources, and how we checked them
Federal and Ontario rates come from Canada Revenue Agency pages on corporation tax rates and Ontario provincial tax, read in 2026. SR&ED rates and limits come from the CRA’s SR&ED news page. The calculator examples use our own tools for 2026 and the derived Ontario blend described above. This is an independent guide, separate from any government body.
Frequently asked questions
What federal tax rate do Canadian tech startups pay?
A CCPC using the small business deduction pays 9% federal on up to $500,000 of active business income. The general rate is 15%.
What is the SR&ED credit rate?
Most CCPCs earn a refundable 35% credit on qualifying spending up to the expenditure limit, and 15% above it.
What is the SR&ED expenditure limit?
$6 million for tax years beginning after December 15, 2024. It falls when average revenue passes $15 million and reaches nil at $75 million.
Does the small business limit get shared?
Yes, among associated corporations. It also shrinks with large taxable capital or passive income.
Are stock option and provincial credit rules covered here?
No. We couldn't verify them from official pages, so this page leaves them out.
- 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