Glide Paths in Retirement: Should Your Allocation Change Over Time?

Most retirement advice treats asset allocation as a set-it-and-forget-it decision. Pick 60/40 or 70/30, rebalance once a year, and move on. But there is a growing body of research suggesting that changing your allocation over the course of retirement can meaningfully improve your odds of success — particularly in the worst-case scenarios that keep retirees up at night.

This idea is called a glide path. You start retirement at one allocation and gradually shift to another over a defined period. The question is: which direction should you glide? The answer is less obvious than you might think.

What Is a Retirement Glide Path?

A glide path is simply a plan to move your asset allocation from one target to another over time. You define a starting equity percentage, an ending equity percentage, and the number of years over which the transition happens. The shift is typically linear — if you go from 40% stocks to 80% stocks over 20 years, you add 2 percentage points of equity per year.

This is different from a static allocation where you hold, say, 60% stocks and 40% bonds for your entire retirement. With a glide path, the allocation at year 1 looks very different from the allocation at year 20. The question is whether that difference matters for portfolio survival and spending sustainability.

It does. And which direction you glide matters a lot.

Three Approaches to Allocation Over Time

There are three basic strategies for managing equity exposure through retirement:

• Static allocation: Hold a fixed percentage in stocks throughout retirement. The classic 60/40 portfolio is the most common example. Simple, requires minimal decisions, but offers no special protection during vulnerable periods.
• Declining equity (traditional): Start with a high stock allocation and gradually reduce it. This matches the conventional wisdom that you should get more conservative as you age. A retiree might start at 80% stocks and glide down to 40% over 30 years.
• Rising equity: Start with a low stock allocation and gradually increase it. This is the counterintuitive approach. A retiree might start at 40% stocks and glide up to 80% over 30 years. It sounds reckless. It is actually the most well-supported by research.

The chart below shows how equity allocation evolves under each approach over a 30-year retirement.

Notice that all three approaches have the same average equity exposure over the full period. The difference is entirely about when that equity exposure occurs. And in retirement, timing is everything.

Why Timing Matters: Sequence of Returns Risk

The reason glide path direction matters so much comes down to sequence of returns risk. When you are withdrawing from a portfolio, poor returns in the early years are far more damaging than poor returns later. A 30% market drop in year 2 of retirement is catastrophic. The same drop in year 22 is inconvenient but survivable, because you have already withdrawn much of what you needed and the remaining portfolio is smaller relative to your total lifetime spending.

This asymmetry is the key insight. A declining equity glide path puts your highest stock exposure at the exact moment when a crash would do the most damage. A rising equity glide path does the opposite — it minimizes stock exposure during the danger zone and increases it only after the portfolio has survived the critical early years.

The chart below shows approximate 10th percentile portfolio values (the worst-case scenarios) for each approach over 30 years, assuming a 4% initial withdrawal rate from a $1,000,000 portfolio.

The difference is striking. In the worst historical scenarios, the declining equity glide path runs out of money around year 25. The static 60/40 barely survives. But the rising equity glide path still has $150K remaining at year 30 — a meaningful cushion that represents the difference between a comfortable retirement and a desperate one.

This is not a small effect. In the worst 10% of outcomes, the rising equity glide path provides substantially more portfolio longevity than either of the other approaches. In median scenarios, all three perform similarly because sequence risk is not a factor when markets cooperate.

Why Rising Equity Works

The logic behind a rising equity glide path has two parts:

Early bonds protect against sequence risk. In the first 5 to 10 years of retirement, your portfolio is at its largest and most vulnerable. Each withdrawal takes a percentage of a large balance. A stock market crash during this period forces you to sell equities at depressed prices, permanently reducing your portfolio's recovery potential. By holding a higher bond allocation during these years, you can fund withdrawals from the stable portion of your portfolio while leaving stocks untouched to recover.

Later stocks capture long-term growth. After 10 to 15 years of withdrawals, your portfolio is smaller and the remaining time horizon is shorter. But you still need growth to sustain another 15 to 20 years of spending. At this point, sequence risk is largely behind you — even a significant crash cannot wipe out a portfolio that has already successfully navigated the danger zone. Higher equity exposure now lets the portfolio capture the long-run equity premium without the devastating early-year risk.

This is not about market timing or predicting returns. It is a structural advantage that comes from aligning your risk exposure with when risk actually matters most.

The Bond Tent Connection

If the rising equity concept sounds familiar, you may have encountered it under a different name: the bond tent strategy. A bond tent is essentially a rising equity glide path that begins before retirement. You increase your bond allocation in the years leading up to retirement, reaching maximum bond exposure right at the transition point, and then gradually shift back to stocks over the first 10 to 15 years.

If you graph the bond allocation over time, it forms the shape of a tent — rising before retirement, peaking at the start, then declining. The retirement-only portion of a bond tent is exactly a rising equity glide path. The pre-retirement portion adds additional protection by ensuring you do not experience a devastating crash right before you stop working.

Both strategies address the same fundamental problem: the years immediately surrounding retirement are the most dangerous, and your portfolio should be positioned defensively during that window. Whether you call it a bond tent or a rising equity glide path, the underlying principle is the same.

What About Higher Withdrawal Rates?

The advantage of a rising equity glide path becomes even more pronounced at higher withdrawal rates. At a 3% withdrawal rate, all three approaches succeed in virtually every historical scenario — the withdrawal rate is low enough that allocation details matter less. But at 4% or higher, the gap widens significantly.

Even with a rising equity glide path, withdrawal rates above 4.5% carry meaningful failure risk over a 30-year period. The glide path improves your odds compared to static or declining approaches, but it cannot overcome the fundamental math of withdrawing too much. It is a structural improvement, not a magic solution.

How FIREwiz Models Glide Paths

FIREwiz includes a built-in glide path feature that lets you test any starting and ending allocation over your retirement period. You set your initial stock/bond split and your target end-of-retirement split, and the simulator linearly interpolates between them year by year.

This means you can model exactly the scenarios discussed in this article:

• A static 60/40 allocation — just set start and end to the same values.
• A declining equity path — start at 80/20 and end at 40/60.
• A rising equity path — start at 40/60 and end at 80/20.
• Any custom glide path that fits your risk tolerance and retirement timeline.

The simulator runs thousands of scenarios with your glide path applied, showing you success rates, spending percentiles, and risk metrics for each configuration. You can compare a glide path side-by-side with a static allocation to see exactly how much difference it makes for your specific situation.

Implementing a glide path in practice requires periodic rebalancing — shifting funds between stocks and bonds each year to match the target allocation. A portfolio tracking tool like Empower can help you monitor your actual allocation and identify when rebalancing is needed, which is especially useful when your targets are changing annually.

Practical Considerations

A few things to keep in mind before adopting a glide path approach:

Behavioral difficulty. A rising equity glide path requires you to buy more stocks as you get older — the opposite of what feels natural. After a market crash in year 5, your glide path says to increase your stock allocation. This is extremely hard to do psychologically, even when the math supports it. Automating rebalancing or working with an advisor who understands the strategy can help.

Starting allocation matters. A rising equity path from 40% to 80% stocks is well-supported by research. A path from 10% to 90% is likely too extreme in both directions. The starting allocation needs to be high enough to provide some growth from day one, and the ending allocation should not exceed your risk tolerance even in the later years.

Glide paths are not a substitute for a sustainable withdrawal rate. No allocation strategy can save a portfolio from a 7% withdrawal rate over 30 years. The glide path improves outcomes at the margin — turning potential failures into successes at the 4% to 5% range — but the withdrawal rate itself remains the primary determinant of success.

Other income sources change the calculus. If you have Social Security, a pension, or rental income covering a significant portion of your expenses, the effective withdrawal rate from your portfolio is lower. In that case, the glide path matters less because sequence risk is already reduced by having stable non-portfolio income.

The Bottom Line

A rising equity glide path — starting with more bonds and gradually shifting toward stocks — is one of the most effective structural improvements you can make to a retirement withdrawal plan. It directly addresses sequence of returns risk by reducing equity exposure when your portfolio is most vulnerable and increasing it when the danger has passed.

The improvement is most significant in worst-case scenarios, which is exactly when you need it most. In good markets, all allocation approaches tend to work. In bad markets, the rising equity glide path provides a meaningful safety margin that static and declining approaches do not.

Ready to see how a glide path would affect your specific retirement plan? Try the FIREwiz retirement simulator with different starting and ending allocations to find the glide path that fits your goals.