Canada Tax Refund Calculator

What the tax refund calculator does

The calculator estimates whether you will receive a refund or owe a balance when you file, by comparing the income tax withheld from your pay with the income tax actually payable on your income. Enter an RRSP contribution to see how a deduction changes the result. A refund is simply tax you overpaid during the year.

Why refunds and balances happen

Employers withhold tax from each paycheque based on estimates that rarely match your final bill. Deductions such as an RRSP contribution lower what you owe, so more was withheld than needed and you get a refund. Income without withholding, such as investment or freelance earnings, can leave you owing even when your salary was taxed correctly.

How the calculation works

• Your RRSP contribution is capped at your room and deducted from income.
• Combined federal and provincial tax is calculated on the reduced taxable income.
• That tax payable is subtracted from the tax withheld.
• A positive result is a refund; a negative one is a balance owing.

A worked example

You earned $90,000 in Ontario, had $20,000 withheld and contributed $10,000 to an RRSP. The RRSP deduction and the deduction for enhanced CPP contributions reduce taxable income to $78,873. Tax payable, after the CPP, EI and Canada employment credits and including the Ontario Health Premium, is about $14,069, so the estimated refund is about $5,931.

Without the RRSP contribution, taxable income is $88,873, tax payable about $17,034 and the refund about $2,966. The $10,000 contribution adds about $2,965 to the refund, which is why an RRSP top-up before the deadline is a common year-end move.

What you need to enter

• Your total income for the year.
• The income tax already withheld, from your pay records or slips.
• Any RRSP contribution you will deduct.
• Your province or territory.

Reading your result

The output shows tax payable, taxable income after the RRSP deduction, the refund or balance owing and your effective rate. A very large refund is not necessarily good: it means you lent money to the government interest-free. A result near zero suggests your withholding is about right; if it is far off either way, consider adjusting contributions or source deductions.

What drives a bigger refund

Anything that lowers taxable income or tax payable raises the refund. Besides RRSP contributions, tuition, medical expenses, childcare, charitable donations and other credits all reduce the bill, so a real return that includes them may show a larger refund than this estimate.

Why the province changes your result

Tax payable combines federal and provincial or territorial tax, so the same income and withholding can mean a refund in a lower-rate province and a balance owing in a higher-rate one. Quebec residents file a separate provincial return with Revenu Québec and have their own credits, so treat a Quebec result as an approximation.

The forms behind the estimate

Tax withheld appears in box 22 of your T4 and is totalled on line 43700 of your return. An RRSP deduction is claimed on line 20800, supported by a contribution receipt. Your Notice of Assessment from the CRA is the final word, reflecting every credit and deduction. Common mistakes are entering the wrong withholding figure and forgetting untaxed income, either of which can turn an expected refund into a balance owing.

This is general information only and not financial advice.

About This Tool: Tax Refund Calculator Canada

Tax refund calculator canada: use this tool to get an instant, accurate estimate. The figures follow official CRA guidance and every rate and threshold is kept up to date for 2026. Adjust the inputs above to match your situation, or browse all our calculators to plan your next step.