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The 4% Rule in Canada: Safe Withdrawal Rate Explained

Published June 25, 2026 · 8 min read · By the WealthWise team · Updated June 25, 2026

⚠️ For information only. General facts and concepts; WealthWise is not a registered investment advisor and gives no personalized advice. Verify with the sources and consult a licensed professional before acting.

In short — The 4% rule says you can withdraw 4% of your portfolio in year one of retirement, adjust for inflation annually, and have a high probability of not running out of money over 30 years. Your FIRE number = annual expenses × 25. In Canada, CPP/OAS reduce what your portfolio must cover, and a more conservative rate (3–3.5%) is worth considering for longer retirements.

You're planning your retirement and you keep running into the same number: 4%. The idea is that withdrawing 4% of your portfolio each year should let you never run out of money. But where did this rule come from, how do you calculate your own FIRE number, and does it actually apply to Canadian realities? Here's an educational overview — not financial advice — to help you understand what this rule says, what it doesn't, and how to adapt it to your situation.

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The Origin: The 1998 Trinity Study

The 4% rule gets its name from a 1998 study published by three professors at Trinity University in Texas: Philip Cooley, Carl Hubbard, and Daniel Walz. Their question was straightforward: at what withdrawal rate can a retiree draw from a balanced portfolio (stocks and bonds) over 30 years without exhausting it?

Analyzing historical U.S. market data, they concluded that an initial withdrawal rate of 4%, adjusted for inflation each year, delivered a high success rate — often cited at around 95% — over a 30-year period. The study has been updated several times since, with broadly consistent results. That is where the famous number comes from: an empirical guideline, not a mathematical guarantee.

Annual expenses	Target portfolio (25×)
$40,000	$1,000,000
$60,000	$1,500,000
$80,000	$2,000,000

The 4% rule implies multiplying annual expenses by 25 to find your FIRE number.

Your FIRE Number: The 25× Formula

The 4% rule implies a very practical planning formula: multiply your annual expenses by 25 to get the portfolio you need. That is your FIRE number.

Annual expenses of $40,000 → target portfolio of $1,000,000
Annual expenses of $60,000 → target portfolio of $1,500,000
Annual expenses of $80,000 → target portfolio of $2,000,000

The logic is simple: 4% of $1,000,000 = $40,000. You can use our FIRE calculator to personalize this based on your savings rate and retirement timeline. Keep in mind this number represents what your portfolio must produce — not necessarily your total retirement income.

The Criticisms and Sequence-of-Returns Risk

The 4% rule is not without flaws, and its creators themselves emphasize that it is a guideline, not a guarantee. The most important criticism is sequence-of-returns risk: if markets crash in the early years of your retirement, you sell depreciated assets to cover expenses, permanently shrinking your portfolio even if markets recover later.

Other important limitations:

30-year horizon only: the Trinity study targeted a 30-year retirement. If you retire at 40 and expect to live to 90 or 95, your horizon is 50–55 years. The 4% rule is notably less reliable over these longer periods.
U.S. data: historical U.S. market returns are among the highest in the world. Studies using global or Canadian data suggest more conservative rates.
Fees and taxes not included: the study does not account for taxation or management fees, which can erode 0.5–1% or more per year.
Variable expenses: life is not linear. A serious illness, a divorce, or major home repairs can blow up one year's budget.

Scenario	Annual expenses	CPP + OAS income	Portfolio must cover	Capital target (25×)
Without CPP/OAS	$50,000	$0	$50,000	$1,250,000
With CPP + OAS	$50,000	$20,000	$30,000	$750,000

Guaranteed income streams like CPP and OAS reduce what your own portfolio must cover — and can meaningfully lower your FIRE number.

Canadian Nuances: CPP/QPP and OAS Change the Math

In Canada, two major public programs change the equation significantly:

The Canada Pension Plan (CPP) or Quebec Pension Plan (QPP): depending on your contributions, you can receive several hundred to over $1,300 per month at age 65, or more if you defer to age 70.
Old Age Security (OAS): at 65, most Canadian residents receive OAS (approximately $700/month in 2025, indexed). At lower incomes, the Guaranteed Income Supplement (GIS) adds to this.

These guaranteed income streams reduce what your portfolio must cover. If your expenses are $50,000 per year and CPP + OAS provides $20,000, your portfolio only needs to produce $30,000 — a capital target of $750,000 rather than $1,250,000. This is why a Canadian's FIRE number can be meaningfully lower than an American's in a comparable situation. Taxation also matters: RRSP/RRIF withdrawals are taxable as income, while TFSA withdrawals are tax-free. Smart sequencing of withdrawals between account types can preserve tens of thousands of dollars over a long retirement.

Retirement profile	Suggested rate	Expense multiple
30-year retirement (age 65, normal life expectancy)	4%	25×
40–50-year retirement (early retirement at 45–50)	3–3.5%	29–33×
Very long retirement or conservative portfolio	2.5–3%	not stated in article

The ideal rate is a compass, not an absolute rule — it depends on how long your retirement needs to last.

What Rate Should You Use? A Compass, Not an Absolute Rule

Given these nuances, many planners and researchers suggest adjustments based on your situation:

30-year retirement (age 65, normal life expectancy): 4% remains a reasonable approximation for a balanced allocation, based on historical data.
40–50-year retirement (early retirement at age 45–50): a rate of 3–3.5% is often recommended, corresponding to a multiple of 29–33× expenses.
Very long retirement or conservative portfolio: some planners suggest 2.5–3%, especially in periods of high market valuations.

The ideal withdrawal rate is personal. It depends on your retirement age, your asset allocation, your guaranteed income sources (CPP, QPP, OAS, pension, real estate), your risk tolerance, and your flexibility to reduce spending if markets fall. The 4% rule is an excellent starting point for planning — not a blank cheque. Consider working with a Certified Financial Planner (CFP) for a plan tailored to your actual situation.

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Frequently asked questions

Has the 4% rule been validated with Canadian data?

Not directly in the original Trinity study, which used U.S. data. Subsequent research using international markets suggests 3.5% is a more prudent rate for global data. Canadian markets, historically strong, are closer in profile to U.S. markets but are less sectorally diversified.

Should I include CPP/OAS in my FIRE portfolio calculation?

Yes. Subtract your estimated guaranteed income (CPP, QPP, OAS) from your annual expenses before applying the 4% rule. This reduces your actual FIRE number. The Service Canada website lets you estimate your future benefit amounts.

What is sequence-of-returns risk and how do I protect against it?

It is the risk that bear markets occur right at the start of your retirement, forcing you to sell depreciated assets. Common strategies include keeping 1–2 years of expenses in cash or short-term bonds, temporarily reducing withdrawals during downturns, or adopting a slightly more conservative allocation as you approach retirement.

Does the 4% rule account for inflation?

Yes: in the Trinity study, the retiree withdraws 4% in year one, then increases that amount each year by inflation — a withdrawal in real terms. In practice, some experts suggest not indexing mechanically every year, but adjusting based on market performance.

Sources & references

Educational content; verify figures with official sources before acting.