RRSP Contribution Room & Tax Refund Calculator

Estimate your available RRSP room, deductible contribution, tax refund, and after-tax contribution cost using explicit assumptions.

This calculator models contribution room, deduction limits, and the tax impact of an RRSP contribution based on simplified CRA-style rules.

No opinions. No hidden assumptions. Just arithmetic.

Inspect the Arithmetic

Simple mode shows the core inputs only. Advanced mode adds pension adjustments, CRA override, and refund method controls.

Inputs

1. Contribution Room Inputs

Year for which you want to estimate RRSP room and refund.
Total RRSP room carried forward into this year from past contribution room. Check your CRA Notice of Assessment or CRA My Account to verify.

2. Income & Contribution Scenario Inputs

Best estimate of your taxable income for this tax year before claiming this RRSP deduction. Required for the refund estimate.
Employment and other RRSP-eligible earned income from the prior tax year. Used only to estimate new RRSP room for this year.
Province or territory of residence for tax purposes.
Amount you plan to contribute for the selected tax year. This is what the calculator tests against your room and refund.

Results

Estimated RRSP contribution room

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Based on 18% of prior-year earned income (capped) plus carryforward and pension adjustments.

Planned contribution

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Amount deductible

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Capped at the smaller of available RRSP room and your planned contribution.

Estimated tax refund

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Refund is estimated by recalculating tax before and after the RRSP deduction.

After-tax cost of contribution

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Remaining RRSP room

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Over-contribution warning
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Excess contribution amount
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Marginal tax rate used (simple mode)
–%
Effective refund % of contribution
–%

About this estimate:

This tool estimates RRSP contribution room and tax refund using simplified rules. Your official CRA RRSP deduction limit may differ and always controls how much you can deduct.

Refunds are estimated using combined federal and provincial income tax brackets for the selected year and province. CPP, EI, and all other credits and deductions beyond this RRSP deduction are not modelled here.

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Disclaimer: All content on The Long Math — including articles, essays, calculators, tools, or any other material — is provided solely for educational and informational purposes and does not constitute financial, tax, legal, or investment advice. Any results or projections are based on simplified models, assumptions, and user-supplied inputs and may not reflect real-world outcomes. You are responsible for evaluating the accuracy and applicability of the information provided and for conducting your own due diligence. Before making financial decisions, consult a qualified professional.