The #1 tax-season question in Canada. Enter your situation and get a ranked recommendation — whether that's the RRSP cascade, TFSA top-up, FHSA, or clearing debt first.
Fill in what you know. Estimates are fine — the goal is a ranked direction, not a precise projection.
When you reinvest your refund into an RRSP, you get another smaller refund next year. That refund can also be reinvested. The effect shrinks each cycle, but the cumulative extra tax savings are real.
Here's what the cascade looks like with your refund and marginal rate over 5 years:
| Year | Amount Invested | Refund Generated | Cumulative Refunds |
|---|
Assumes 6% annual growth. RRSP shown as after-tax value at withdrawal (same marginal rate). Debt payoff shown as guaranteed interest savings.
How these numbers work: TFSA and FHSA projections are tax-free withdrawal values. RRSP is projected gross value discounted by your current marginal rate (assumes same rate at withdrawal — if you expect a lower rate in retirement, RRSP is actually better than shown). Debt payoff shows guaranteed interest savings over 10 years. All projections use 6% growth. Actual returns vary.
When you contribute to an RRSP, the CRA returns the taxes you overpaid during the year — typically 20–50% of what you contributed, depending on your province and income. That refund is yours to do anything with.
The cascade strategy: instead of spending the refund, you reinvest it into your RRSP. That creates another, smaller tax deduction — which generates another, smaller refund. Repeat.
Real example: You contribute $5,000 to your RRSP at a 38% marginal rate. Refund: $1,900. You reinvest $1,900 → another refund of $722. Reinvest that → $274 more. Total additional refunds beyond the first: nearly $1,000. All of it now growing inside the RRSP.
The cascade doesn't run forever — each round is smaller by a factor of your marginal rate. But in the first 3–4 cycles, you can extract a meaningful additional amount from the CRA that would otherwise just sit in your chequing account.
The math: if your marginal rate is t, the total additional refunds from the cascade sum to R × t / (1 − t). At 38%: $5,000 × 0.38 / 0.62 = $3,065 in total refunds from a single $5,000 contribution. That extra $3,065 is all inside your RRSP, compounding.
If your marginal tax rate at contribution equals your rate at withdrawal, RRSP and TFSA produce identical after-tax wealth. The real difference is timing: RRSP lets you invest pre-tax dollars now and pay tax later, while TFSA uses after-tax dollars with zero tax ever after.
For the refund specifically, the comparison is cleaner: the refund is cash you have today. Putting it in a TFSA is straightforward. Putting it back in an RRSP extends the cascade and generates more compounding room — but that extra room will eventually be taxed. At the same rate, they tie. At a lower expected withdrawal rate, RRSP wins.
The First Home Savings Account launched April 1, 2023. Three years in, a large share of Canadians who could benefit haven't opened one — partly because it wasn't well-promoted, partly because the rules are genuinely confusing at first glance.
FHSA basics: You get a tax deduction on contributions (like RRSP), and withdrawals for a qualifying home purchase are tax-free (like TFSA). Annual contribution limit: $8,000. Lifetime: $40,000. You must not have owned a home you've lived in as a principal residence in the current year or the previous four calendar years.
If you haven't opened an FHSA and you're a first-time buyer, opening one now and contributing your refund gives you two benefits: the deduction (which creates another refund next spring) and tax-free growth for a home purchase. That's a better deal than either RRSP or TFSA in isolation, for first-time buyers.
The FHSA can also roll into your RRSP, tax-deferred, if you end up not buying — making it an extended RRSP contribution with better flexibility. You have up to 15 years from opening to use or roll it.
You can open an FHSA at any major bank, credit union, or at self-directed brokerages like Questrade and Wealthsimple. Wealthsimple launched FHSAs in 2023 and offers ETF investing inside the account with no account fees. Most bank FHSAs default to mutual funds or GICs — watch the MER on whatever they put you in.
Not everyone needs the full calculator. Use this table to orient yourself fast.
| Your Situation | Best Use of Refund | Why |
|---|---|---|
| Credit card debt at 19.99%+ | Pay the debt first | No investment reliably beats 20% guaranteed return |
| First-time buyer, buying <5 years | FHSA first, then RRSP or TFSA | Deduction + tax-free withdrawal is the best available combo |
| High income (35%+ marginal rate), expect lower income in retirement | RRSP cascade | Defers tax to lower-rate years, cascade compounds more |
| Expect same or higher income in retirement (pension, rental income) | TFSA top-up | No tax at withdrawal; RRSP advantage disappears if rates equalize |
| Have FHSA room but not buying for 10+ years | Still worth opening FHSA | Can roll to RRSP without using RRSP room — effectively extra RRSP space |
| Low income this year, expect higher income next year | TFSA this year | Carry forward unused RRSP room and contribute when in a higher bracket — bigger refund later |
Once you've decided on RRSP, TFSA, or FHSA — the next question is what to actually buy inside the account. Our ETF guide covers the go-to options for Canadians.
Best Canadian ETFs → RRSP vs TFSA GuideThis tool is for general educational purposes and does not constitute financial advice. Tax rates used are approximations for 2025/2026 — verify your exact marginal rate using CRA's My Account or a tax professional. FHSA eligibility rules apply; confirm your qualifying status before contributing. Projections assume constant 6% annual returns; actual results will vary. Consult a qualified financial advisor before making investment decisions.