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The best free tax estimator is one that asks for your income, your province and what’s been withheld, then shows the result on one screen. On $70,000 of employment income in Ontario, our income tax calculator gives $11,134 of federal and Ontario tax for 2026. CPP and EI add $5,080 on top.
What does a free tax estimator actually tell you?
It tells you roughly what the year will cost, before you file. That’s all. Really. It runs your income through the federal and provincial brackets, subtracts the basic credits and adds the payroll contributions, and it does this in the time it takes you to type a number.
It can’t see your slips, your receipts or your spouse’s return. So treat the answer as a good guess, not a filed number. If the estimate and your final return land within a few hundred dollars of each other, the tool did its job. If they don’t, the gap points to a slip or credit you left out.
Which tool you need depends on the question. Here are the ones we built, with the question each one answers.
| Your question | Tool |
|---|---|
| How much tax will I owe on my income? | Income tax calculator |
| Will I get a refund or owe a balance? | Tax refund calculator |
| What does the next dollar I earn cost? | Marginal tax rate calculator |
| What lands in my bank account? | Take-home pay calculator |
| I work for myself, what do I owe? | Self-employed tax calculator |
What do you need to type in?
Not much. Your yearly employment income, your province, and if you want a refund figure, the income tax already deducted, which sits on your T4. If you have a deduction such as an RRSP contribution, have that number ready too. Two minutes, tops, and you’ll know if you’re in for a refund or a cheque to the taxman.
Use the province you lived in on December 31, not the one where the office is. Get that wrong and the whole answer shifts.
How much tax comes off $70,000?
Take a single employee in Ontario with $70,000 of employment income and nothing else. The estimate is $7,278.19 of federal tax and $3,855.73 of Ontario tax, so $11,133.91 in total. That’s an average rate of 15.9%.
CPP and EI take another $5,079.82. After both, you’re left with $53,786.27, or about $4,482 a month before any other deductions. That’s the real take-home picture, and it’s what your budget should be built on.
Now add a $5,000 deduction, say an RRSP contribution. Total income tax falls to $9,651.41, which is $1,482.50 less. The saving is about 29.6% of the deduction, the same figure the marginal tax rate calculator shows for Ontario in that income range. That’s why people chase RRSP room in February.
Will you get a refund or owe money?
This is the number most people really want.
Enter your employment income and the tax already withheld, which is on your T4 slip. The tax refund calculator compares the two.
Using the same $70,000 income, suppose $11,000 was withheld. The estimate is a balance owing of $133.91. Had your employer withheld $12,000 instead, the same tool shows a refund of $866.09. The direction depends on that one withholding line.
A refund isn’t a bonus. It’s your own money coming back late, with no interest. If you’re getting a big one every spring, your employer is holding back too much and you could ask to change it.
Where do free estimators go wrong?
They all share the same blind spots, ours included. Check this list before you trust a figure.
- Benefits and refundable credits, such as the Canada child benefit, aren’t part of the tax figure.
- Only the basic personal amount, the Canada employment amount and the CPP and EI credits are counted, so medical costs, tuition and donations need to go in as other credits.
- Quebec residents file a separate provincial return, and a general tool will only approximate it.
- Your province is set by where you lived on 31 December, not where you work.
Also be careful with income that isn’t a salary. Dividends and capital gains are taxed differently, and the dividend tax calculator and capital gains tax calculator handle those. The capital gains inclusion rate stays at 50% for 2026, because the proposed increase to two-thirds was cancelled.
Can a free estimator replace a tax return?
No. It’s a ballpark. The return itself still has to go to the CRA, through certified software, a preparer or paper, and only the CRA’s notice of assessment is the final word on what you owe. If doing the return yourself feels like too much, the CRA runs a free tax clinic program where volunteers prepare returns for people with a modest income and a simple tax situation.
Which dates matter for the 2025 return?
For the 2025 tax year, most people had to file by 30 April 2026, and the balance owing was due the same day. Self-employed people had until 15 June 2026 to file, but any tax owing was still due on 30 April. Dates for the 2026 tax year haven’t been published yet, so check the CRA page in early 2027.
If you still haven’t filed 2025, NETFILE-certified software accepts that return until 29 January 2027, according to the CRA. Late filing carries penalties and interest, so it’s better to file than to wait for a perfect estimate.
The sources behind this page
The rates and brackets in our estimators are the 2026 federal and provincial figures published by the Canada Revenue Agency and the provinces. CPP and EI figures come from the CRA payroll pages. Our tools are estimates and don’t replace your notice of assessment.
Frequently asked questions
Is a free tax estimator accurate?
It's a good guess for a simple employment return. Credits, benefits and slips it can't see will move the final number, sometimes by several hundred dollars.
What do I need to use one?
Your province on 31 December, your income and any tax already withheld. The withholding amount is on your T4 slip.
Can I estimate a refund before I have my T4?
Yes, use your last pay stub's year-to-date tax as a stand-in. Redo the estimate when the real slip arrives.
Does an estimator file my return?
No. It only does the maths. You still need to file through certified software, a tax clinic or a preparer.
Why does my estimate differ from my final assessment?
Deductions, credits and slips you didn't enter are the usual reasons. Compare the two and note which line differs.
- How to choose a tax preparer in Canada
How to decide if you need a tax preparer, what a preparer does, the questions to ask before you hire one and where to find free help in Canada