The most repeated piece of retirement advice in Canada is also one of the most expensive: shift your portfolio to bonds as you approach retirement. The rule of thumb dresses itself up in different ways. "100 minus your age in equities." A "glide path" toward fixed income. A "conservative allocation" for retirees. The advice sounds prudent. For most Canadian retirees, the math says it isn't.

A 65-year-old Canadian couple has roughly a 50% chance of one spouse living to 92. That's a 27-year planning window. Treating retirement as a stopping point, when it is actually a multi-decade investment horizon, leads to portfolios that lag inflation-adjusted equity-heavy plans by 30-50% in terminal wealth over a full retirement. The cost shows up as a smaller estate. It also shows up earlier, as a retiree who under-spends every year because their plan tells them they can't afford to spend more.

This blog walks through the math of why the traditional glide path is overcorrected for the wrong risk, why the advice made sense in a previous era, and what a sustained-equity framework with a cash wedge looks like instead. It is not a recommendation for any specific allocation. It is a case for stress-testing your current plan against the longevity reality of a Canadian retirement.

Retirement is a 27-year investment horizon, not an income-only event

The most common framing error in retirement planning is treating the day you stop working as if it is the day your portfolio stops needing to grow. It isn't. Statistics Canada life-expectancy data shows that a 65-year-old Canadian today has a life expectancy in the mid-80s. That's an average. Joint longevity, the chance that at least one member of a couple is still living, pushes the planning horizon meaningfully further. Roughly half of 65-year-old Canadian couples will see one spouse reach 92. Roughly a quarter will see one spouse reach 95.

That horizon is not a fixed-income horizon. It's an equity horizon. Over any 25 or 30-year period in modern Canadian and global market history, equities have produced real returns that fixed income simply cannot match. The right comparison is not "which asset is safer this year." The right comparison is "which asset class funds the next three decades of inflation-adjusted spending."

This is where the planning conversation tends to get stuck. The first five years of retirement carry real sequence-of-returns risk, and that risk is genuine. A 30% market drawdown in year one or year two of retirement, combined with withdrawals, can permanently impair a portfolio. We've written about this honestly in our breakdown of sequence-of-returns risk. But sequence risk is a five-year problem inside a 30-year window. The traditional glide path treats the entire window like the five-year problem, and that's the overcorrection.

What "shift to bonds at retirement" actually costs over 30 years

To make this concrete, consider a $1,000,000 portfolio at age 65 funding $50,000 of inflation-adjusted withdrawals annually. Run the same scenario two ways across a 30-year horizon, using long-run historical asset-class assumptions:

The numbers are illustrative, not a forecast. But the directional gap is consistent across virtually every long-run historical period: a bond-heavy retirement portfolio trails an equity-heavy one by something like 30-50% in real terminal wealth over a full retirement. That gap doesn't only show up as a smaller estate. It shows up as a retiree whose plan tells them they can spend $50,000 a year safely, when a less conservative plan would have supported $58,000 or $62,000.

The other half of the story is inflation. A 60/40 portfolio yielding a nominal 5% in a 3% inflation environment is producing 2% real returns. Two percent doesn't fund 30 years of inflation-adjusted spending at any meaningful level. Inflation is the slow leak that eats fixed-income retirement portfolios from the inside, and it's the risk the traditional glide path silently ignores while focusing on the volatility risk it can see.

Why the traditional advice was right for a different era

The shift-to-bonds advice didn't come from nowhere. It came from a Canadian retirement landscape that no longer exists.

In the 1970s and 1980s, the typical Canadian retiree had a defined-benefit pension that covered a meaningful share of their living expenses. CPP and OAS were closer to a primary income source than a top-up. Retirements were shorter, often 15 or 20 years instead of 30. And the portfolio's job was relatively narrow: smooth out income on top of guaranteed pension cash flow.

In that world, shifting to bonds at 65 made sense. The portfolio wasn't doing the heavy lifting. The DB pension was. Volatility was the dominant risk, because longevity risk and inflation risk were absorbed elsewhere.

That world is gone for most Canadians retiring today. Defined-benefit pensions are concentrated in public-sector employment and a shrinking set of large private employers. The majority of the workforce is in defined-contribution plans, group RRSPs, or no employer plan at all. CPP and OAS combined replace roughly 25-40% of pre-retirement income for a median earner, which means the portfolio is doing the rest of the work. And retirements are 25-30 years long.

The job description for a retirement portfolio has changed. The advice hasn't caught up.

The right framework: cash wedge plus sustained equity exposure

If the traditional glide path is overcorrected, what does a math-led framework look like for a modern Canadian retiree? Three components.

1. A cash wedge sized to your sequence-risk window

Sequence-of-returns risk is real, but it's a five-year problem, not a 30-year problem. The cleanest way to defuse it is a cash wedge: 1-3 years of essential expenses held in safe, liquid assets (high-interest savings, GICs, short-duration government bonds). The wedge lets you avoid selling equities into a drawdown in the years where that would do permanent damage. We've written about how to size and build a cash wedge here.

The exact size depends on your spending needs, your guaranteed income (CPP, OAS, pensions), and your tolerance for selling into a down year. For most retirees, 18-36 months of essential expenses is the right zone. Less than 12 months leaves you exposed. More than three years starts to become its own drag on long-term returns.

2. The rest of the portfolio stays heavily invested in equities

Once the cash wedge is funded, the remaining portfolio is funding a 25-30 year horizon. That horizon belongs in equities. A 70-80% equity weighting is not aggressive for a multi-decade Canadian retirement. It's appropriate to the time horizon the money actually has to grow.

Diversified globally, weighted toward broad equity index exposure, this is the portion of the portfolio doing the real work of outpacing inflation and funding the back half of retirement. Vanguard's well-known research on lump-sum investing makes the same point in a different context: time in market is the lever, and two out of three times lump-sum investing beats dollar-cost averaging because of it. The principle generalizes. The cost of being out of equities is real, and it compounds.

3. The glide path can actually go the other direction

Here is the counterintuitive part. Once you've survived the first five years of retirement without a catastrophic sequence-of-returns event, your remaining horizon has de-risked itself. The same portfolio that needed sequence-risk protection at 65 doesn't need it the same way at 72. Some of the academic work on "rising equity glide paths" (notably from Wade Pfau and Michael Kitces) shows that allocations can actually increase equity weight as the retiree ages past the sequence-risk window.

This is not a recommendation. It is a flag that the traditional "lower equity every year" advice is exactly backwards from what the math supports for a modern Canadian retirement. The first five years deserve sequence-risk protection. The next 20-25 years deserve sustained equity exposure.

4. The over-conservatism trap compounds

One of the recurring patterns we see across Optiml plans is the same retiree being over-conservative on two fronts at once. Their portfolio is too bond-heavy, and their planned spending is below what the math supports. The two compound. A conservative portfolio produces a conservative plan output, which produces a conservative withdrawal recommendation, which produces a retiree who under-spends a retirement they actually had room to enjoy. We wrote about the spending side of this trap in Stop Feeling Guilty and Spend More in Retirement. The asset-allocation side is the upstream cause.

How Optiml models this

Optiml's planning engine is built to stress-test exactly this question. Three of the named features matter here.

The Success Score runs your retirement plan against 50 distinct market scenarios, including sequence-of-returns shocks in the early years. If your plan's equity allocation is over-conservative, the Success Score will often still come back at 100, but the plan's spending output will be lower than it needs to be. If your plan's equity allocation is too aggressive for your real risk tolerance and cash wedge, the Success Score will surface that across the scenarios where sequence risk bites. Stress-testing across 50 scenarios is how you see whether your current allocation is the right answer for your specific situation, instead of relying on a rule of thumb built for a different era.

The Withdrawal Optimizer factors your equity-versus-bond mix into the safe-spend recommendation. Two retirees with the same total portfolio and the same expenses will see different optimal withdrawal sequences depending on their asset allocation. A bond-heavy plan produces a more conservative withdrawal output, which is mathematically correct given the lower expected return. A sustained-equity plan with a cash wedge typically supports a higher safe-spend, because the portfolio is doing more work.

Compare Plans is where the glide-path question gets resolved in one screen. You can model a traditional 60/40 glide-path plan and a sustained-equity-with-cash-wedge plan side by side, with the same spending assumptions, and see the difference in projected portfolio path, projected lifetime taxes, and projected estate value. The point isn't to push every retiree toward more equity. It's to make the trade-off explicit instead of inherited.

For Canadians with corporate assets or a significant RRSP Meltdown opportunity, the asset-allocation decision compounds with the withdrawal-sequencing decision. The Withdrawal Optimizer and Compare Plans handle that interaction in the same plan.

Bottom line

The advice to shift your portfolio to bonds at retirement was right for a different Canadian retiree. It was right when retirements were 15-20 years, when DB pensions did the heavy lifting, and when inflation was an afterthought. For most Canadians retiring today into a 25-30 year horizon with a portfolio doing the primary work, the math says the traditional glide path leaves real money on the table. A cash wedge sized to your sequence-risk window, with the rest of the portfolio sustained in equities, is the framework the math supports.

If your current plan was built on a "shift to bonds at 65" assumption, it's worth running it through a stress test against the 27-year horizon it's actually funding. Optiml's Success Score, Withdrawal Optimizer, and Compare Plans are built to make that comparison concrete. You can model your own plan at optiml.ca and see what a sustained-equity framework looks like against your traditional glide path, side by side, in your numbers.