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RRSP Calculator — Canada 2026
How it works
An RRSP contribution is a deduction: it lowers your taxable income dollar for dollar, so the tax you save is roughly the contribution × your marginal tax rate — with an important catch. If the contribution is large enough to push you down through a bracket, part of it is refunded at the lower rate. This calculator does it properly: it runs the full 2026 tax engine twice, once at your salary and once at your salary minus the contribution, and the difference is your estimated refund (which may arrive as a bigger refund or a smaller balance owing).
Worked example
On a $70,000 Ontario salary, a $5,000 RRSP contribution saves about $1,483 of tax in 2026 — an effective refund rate of 29.65%, matching the combined federal (20.5%) + Ontario (9.15%) marginal rate at that income. Invested at 5% for 25 years, that single $5,000 contribution grows to about $16,932 before withdrawal tax.
The 2026 rules that matter
- New room: 18% of last year’s earned income, up to the 2026 dollar limit of $33,810, minus any pension adjustment, plus unused room carried forward. Your exact limit is on your Notice of Assessment and in CRA My Account.
- Deadline: contributions in the first 60 days of the year can be claimed on the prior year’s return.
- Withdrawals are taxed as income in the year you take the money out (withholding tax applies at withdrawal; the return settles the difference).
- TFSA or RRSP first? It depends on your marginal rate now versus in retirement — see RRSP vs TFSA: Which One First?
Frequently asked questions
Is the RRSP refund “free money”?
No — it is a tax deferral. You get tax back now, but withdrawals in retirement are fully taxable. The RRSP wins when your retirement tax rate is lower than today’s.
What if I contribute more than my room?
There is a $2,000 lifetime grace amount; beyond that, excess contributions are penalized 1% per month until removed. Check your Notice of Assessment before contributing a large lump sum.
Does this calculator know my personal RRSP room?
No — and no website can. Your room is personal and held by the CRA. We show the 2026 limits and the tax math; confirm your room in CRA My Account.
Related: Take-Home Pay Calculator · TFSA Calculator · RRSP vs TFSA guide