When should I start contributing to my RRSP?

As soon as you have earned income and pay income tax — but the RRSP deduction is most valuable when your marginal tax rate is high. As a general guide: if your marginal rate is above 26%, prioritize RRSP over TFSA. If it is below 26% (typically lower income or early career), consider filling your TFSA first. The RRSP deduction itself can be deferred to a higher-income year, so contributing early while carrying forward the deduction is a valid strategy for growing assets tax-deferred even at low incomes.

RRSP or TFSA first — which should I choose?

The core rule: RRSP is more valuable when your contribution-year marginal rate is higher than your withdrawal-year marginal rate (i.e., retiring at a lower income). TFSA is more valuable when the opposite is true. For most workers earning $50,000–$100,000 today and expecting to retire on less, RRSP makes sense. For someone earning $40,000 now who expects higher income later, TFSA-first is more efficient. Many Canadians benefit from using both depending on the year and circumstances.

What is the RRSP contribution limit?

For 2025, the RRSP contribution limit is 18% of your prior year's earned income up to a maximum of $32,490. Unused room from prior years carries forward indefinitely and appears on your latest Notice of Assessment. You can verify available room through My CRA Account at canada.ca.

What is the RRSP contribution deadline?

To claim an RRSP deduction for a specific tax year, you must contribute by 60 days after December 31 of that year. In 2026, the deadline for 2025 RRSP contributions is March 2, 2026 (60 days after December 31, 2025). Note: you can contribute to your RRSP at any time — only the deduction has a deadline. Contributions made after the March deadline count toward the following tax year's deduction.

Is it too late to start an RRSP at 40 or 50?

No. Contributing in your 40s and 50s is still highly effective — these are often peak earning years with higher marginal rates, making the RRSP deduction more valuable than at lower incomes. The RRSP must be converted to a RRIF or annuity by December 31 of the year you turn 71. A 50-year-old contributing the maximum for 20 years at a 6% average return could accumulate $1.2M+ before conversion. Starting later produces fewer years of compounding, but the tax deduction benefit remains the same.

What is a spousal RRSP and when is it useful?

A spousal RRSP lets the higher-earning spouse contribute to an RRSP in the lower-earning spouse's name. The contributor gets the tax deduction; the account holder pays tax on future withdrawals. This is most valuable when spouses have significantly different income levels in retirement, because it splits income more evenly between them, reducing the household's combined tax bill. Withdrawals from a spousal RRSP within 3 calendar years of contribution are attributed back to the contributing spouse.

When Should I Start an RRSP in Canada?

Short Answer

Start your RRSP as soon as you have earned income and are above roughly a 26% marginal tax rate. If your marginal rate is lower, fill your TFSA first but consider contributing to an RRSP anyway and carrying forward the deduction to a higher-income year. There is no financial advantage to waiting — contribution room carries forward, but the tax-deferred growth does not begin until you invest.

RRSP vs TFSA: Which Comes First?

Your marginal tax rate now	Expected marginal rate at withdrawal	Better account first
High (33%+)	Low (expected in retirement)	RRSP — deduction worth more now
Low (under 26%)	High (income expected to rise)	TFSA — keep flexibility
Medium (26–33%)	Similar	Both — split contributions

Key principle: RRSP benefits from the difference between your contribution-year rate and your withdrawal-year rate. When income falls significantly in retirement, the RRSP is extremely tax-efficient.

Marginal Tax Rates by Income (2025, Ontario Example)

Taxable income	Marginal rate	RRSP deduction value per $1,000 contributed
Under $16,129	0%	$0 — no tax to offset
$16,130 – $49,958	~20.05%	~$200
$50,000 – $100,392	~29.65%	~$297
$100,393 – $110,000	~43.41%	~$434
$110,001 – $165,430	~46.41%	~$464
Above $246,752	~53.53%	~$535

At $100,000+ income, every $1,000 RRSP contribution saves over $430 in taxes — making the RRSP exceptionally powerful at peak income years.

RRSP Contribution Room

Year	Contribution limit	Carry-forward	Total room
2025	Lesser of 18% of 2024 earned income or $32,490	All prior unused room	Prior room + 2025 room
2024	$31,560 max	—	—
2023	$30,780 max	—	—

Your available room appears on your most recent Notice of Assessment from CRA, or in My CRA Account online.

RRSP Contribution Deadline

What	When
Contribution deadline for prior tax year deduction	60 days after December 31 = ~March 1
2025 RRSP contribution deadline	March 2, 2026
Contributions after the deadline	Count toward next year’’s deduction
Carry-forward of deduction	You can contribute in 2025 and claim the deduction in a future higher-income year

Build the RRSP Early: Growth Compounding Illustration

Start age	Annual contribution	Rate of return	Balance at 65
25	$6,000/year	6%	$928,000
30	$6,000/year	6%	$676,000
35	$6,000/year	6%	$484,000
40	$6,000/year	6%	$337,000
45	$6,000/year	6%	$223,000

Starting 10 years earlier at the same contribution rate nearly doubles the balance at retirement. Time in market outperforms timing the market.

RRSP Carry-Forward Strategy

You can contribute to your RRSP now and claim the deduction in a later, higher-income year:

Contribute $10,000 today (income low — marginal rate 25%)
Do not claim the deduction on this year’s return
Wait until income rises to 43% marginal rate
Claim the same $10,000 deduction — saves $4,300 instead of $2,500

This strategy is particularly useful for professionals in training years, business owners in a low-income transition year, or employees expecting a significant salary increase.

Spousal RRSP: Income-Splitting in Retirement

Who contributes	Who owns the RRSP	Who pays tax on withdrawal
Higher earner (contributor)	Lower-earning spouse	Lower-earning spouse

Spousal RRSP contributions use the contributor’s contribution room. The benefit:

Example: Without spousal RRSP, higher-earning spouse withdraws $70,000/year from RRSP in retirement (~33% marginal rate). With spousal RRSP, each spouse withdraws $35,000/year (~20% marginal rate). On $70,000 total, the household saves ~$9,000/year in retirement income tax.

The 3-year attribution rule: withdrawals within 3 calendar years of contribution are taxed in the contributor’s hands, not the account holder’s. Plan withdrawals carefully.

Bottom Line

Start your RRSP as soon as your marginal rate makes the deduction worthwhile — typically when earning above $50,000. Every year of delay costs the tax-deferred compounding that the RRSP provides. If you are at an early-career low marginal rate, contribute to your TFSA first but open the RRSP account and contribute any amounts you can carry forward to a higher-income year. For couples with income differences, a spousal RRSP is one of the most effective income-splitting tools in Canada.