The math of a 30-year retirement has changed. Most allocation advice hasn’t.

allocation advice hasn’t.

Most Americans aren’t saving enough for retirement. That’s a well-documented reality, not a controversial opinion. What doesn’t get discussed enough, however, is that traditional asset allocation in retirement makes that problem worse. If you’re working with a smaller nest egg than you’d like, the last thing you need is a strategy that buries half of it in bonds. The framework I’ll describe here — heavier on equities, with a disciplined cash cushion — makes portfolios work harder and last longer. As a result, it matters for everyone, but especially for people who need every dollar to pull its weight.

Thirty years ago, retiring at 65 meant planning for roughly 15 years of withdrawals. Today, by contrast, a 65-year-old woman has a 50% chance of living past 86. Moreover, for a married couple both age 65, there is roughly a 64% chance that at least one of them reaches 90, according to Social Security Administration actuarial data. Consequently, a 30-year retirement is no longer the exception. For most couples, it’s close to the median outcome. Your portfolio, therefore, has to sustain withdrawals as long as a career did — yet most conventional asset allocation in retirement advice is built for a world that no longer exists.

Why Conventional Asset Allocation in Retirement Falls Short

The old rule of thumb — 100 minus your age in stocks — puts a 65-year-old at 35% equities and 65% bonds. Some updated versions nudge it to “110 minus your age,” which still lands at only 45% stocks. Whether your advisor uses that traditional framework, the more widely cited 60/40 portfolio, or a target-date fund — Vanguard’s glide path drops to roughly 30% stocks at retirement, even more conservative than 60/40 — all of them leave retirees with far too little growth. I think that’s a dangerous place to be.

The math is straightforward. At a 4% annual withdrawal rate — the benchmark financial planner William Bengen established in his landmark 1994 research — a $1 million portfolio generates $40,000 per year. Inflation at 3% cuts the real purchasing power of that $40,000 by nearly half over 25 years. Consequently, your portfolio needs to compound, not coast. A 65% bond allocation in retirement doesn’t compound. It limps.

The Bond Problem in Retirement Portfolios — Let’s Be Direct

Duration Risk Is Not a Footnote

Bonds are sold as the “safe” component of any retirement portfolio. That framing, however, papers over a real and measurable risk: duration risk. When interest rates rise, bond prices fall. Furthermore, the longer the maturity, the harder the fall. A standard 10-year Treasury bond loses roughly 8 to 9% of its market value for every 1% rise in rates. We saw this concretely in 2022, when the Bloomberg U.S. Aggregate Bond Index dropped approximately 13% — its worst calendar year on record. That’s not theoretical. That’s a portfolio losing 13% in an asset class clients thought was the safe part.

Bond Mutual Funds vs. Individual Bonds and CDs — Not the Same Animal

That 2022 collapse hit bond mutual fund holders hardest, and for a specific reason. When you own a bond mutual fund, you own units in a pool — not bonds directly. As a result, when rates rise and underlying bond prices fall, the fund’s net asset value falls with them. If you need cash for a distribution, you sell units at that depressed price. You book a real loss. There’s no way around it.

Individual bonds and certificates of deposit (CDs) work differently. Specifically, if you buy a 2-year Treasury or CD and hold it to maturity, you get your principal back in full — regardless of what interest rates did in between. The right approach, therefore, is to build a laddered portfolio of individual short-term bonds and CDs with staggered maturities. Some come due in six months, others in a year or two. Consequently, maturities always roll toward you — which means you always have cash available to fund distributions or reinvest, and you never have to sell a mutual fund at a loss.

How Inflation Destroys Bond Returns

I’ve written in previous posts about the structural inflation threat we’re dealing with — commodity disruptions, sticky services costs, and fiscal spending that shows no signs of contracting. Bonds sit directly in the path of that threat. A 10-year Treasury yielding around 4.3% looks acceptable until you run the real numbers. In a taxable (non-IRA) account, subtract 3% inflation and the federal tax bite on interest income — taxed as ordinary income, not at the lower capital gains rate. Your real after-tax return is barely positive. Inside a traditional IRA, you avoid the annual tax drag. Nevertheless, inflation still erodes the purchasing power of every dollar that bond returns. Either way, in a slugflation environment where inflation re-accelerates while growth slows, a heavy bond allocation in retirement is a slow bleed.

Jeremy Siegel’s research in Stocks for the Long Run, tracking returns back to 1802, found that stocks delivered a real annual return of about 6.6%. Bonds, by contrast, delivered roughly 3.6% — and that includes the 40-year bond bull market from the early 1980s through 2021. That structural tailwind is gone. Rates have normalized. Therefore, the long bull market that made 60/40 portfolios look smart for four decades is not coming back soon. Retirees who hold 40 to 50% in bonds are carrying more risk than they realize.

The Opportunity Cost Over 30 Years Is Enormous

A portfolio with 65% in bonds and 35% in stocks may feel safer. In any given down year for equities, it will probably lose less. However, the drag on compounding over 25 to 30 years is severe. If your equity sleeve grows at 8 to 10% annually and your bond sleeve generates 2 to 3% in real terms, the blended return on a 35/65 portfolio falls well short of an 85/15 portfolio. That gap, compounded across three decades, is often the difference between a portfolio still healthy at 90 and one that runs out at 80. That’s the risk that doesn’t get discussed enough: outliving your money.

The Better Framework for Asset Allocation in Retirement: 85% Equities, 15% Cash and Short-Term Bond Ladder

Rather than loading a retirement portfolio with bonds, the right asset allocation in retirement is approximately 85% equities and 15% cash plus a short-term bond ladder. Ideally, the 85% equity portion lives in your IRA. Meanwhile, the 15% cash and bond ladder lives in your taxable account. For those who prefer buy-and-hold dividend-paying stocks, those also belong in the taxable account — more on that shortly.

That 15% isn’t a guess. It’s sized to cover 3 to 5 years of anticipated withdrawals, based on a 4% annual distribution rate. On a $1 million portfolio, that’s $40,000 per year times four years — roughly $160,000 in cash and short-term instruments. At $2 million, it’s $320,000. The number floats with portfolio size, but the logic is fixed.

Ratcheting Back Equity Exposure as You Age

The 85/15 asset allocation in retirement is not a permanent setting. At age 72, required minimum distributions (RMDs) change the picture. The IRS requires distributions from your traditional IRA each year based on your account balance and life expectancy — whether you need the money or not. Because the IRA has run 100% equities through the pre-RMD years, those forced distributions now come out of your equity portfolio. That’s the trigger to begin ratcheting down equity exposure over time.

The right move is not to flip to a conservative allocation overnight. That would simply recreate the bond-heavy drag described above. Instead, step the equity component down gradually as RMDs grow each year. Use those distributions to fund expenses or supplement the taxable account cash sleeve as needed. The goal is to arrive at your mid-to-late 80s with meaningful equity exposure still intact, but with enough stability that a bad market year doesn’t derail your income. Each person’s circumstances dictate the exact strategy — there is no universal glide path.

How the Retirement Cash Cushion Works in Practice

Start building toward this structure at age 55 — about 10 years before most people plan to retire. That gives equities time to compound and lets you accumulate the cash cushion without scrambling. By retirement, the cash sleeve should be fully funded and ready.

Once distributions begin, the rule is simple: living expenses come out of cash first. Never out of equities. When markets are healthy, harvest gains to replenish the cash. When markets correct, draw from the cushion and leave equities alone. The goal is to never sell stock into a down market to fund monthly expenses — unless an unplanned distribution exceeds the available cash sleeve. That’s not a failure. It’s even expected from time to time.

This approach directly addresses sequence-of-returns risk — the danger of selling equities at depressed prices early in retirement. A major drawdown in years one through five, combined with forced selling, can permanently cripple a portfolio’s recovery. Three to five years of cash runway eliminates that forced selling entirely. For context, the S&P 500 took about 2.5 years to bottom during the 2000 to 2002 dot-com collapse and roughly 17 months peak-to-trough during the 2007 to 2009 financial crisis. A 3 to 5-year cushion covers both scenarios with room to spare.

Asset Location in Retirement: Where You Hold Assets Matters

Most advisors focus on asset allocation — what percentage goes to stocks, bonds, and cash. Fewer, however, focus adequately on asset location — which assets belong in which account. Conventional wisdom says put bonds inside your IRA to defer ordinary income tax on interest, and stocks in your taxable account to capture lower capital gains rates. That’s a reasonable but generic starting point. A more nuanced approach — one that looks at the purpose and characteristics of each asset — produces meaningfully better after-tax outcomes.

Taxable (Non-IRA) Accounts: Buy-and-Hold Stocks, K-1 Investments, Cash, and the Bond Ladder

The taxable account is the right home for several specific asset categories. First, dividend-paying stocks you intend to hold long-term — positions you plan to own for years or decades without selling. As long as you don’t sell, you don’t trigger a capital gains event. Additionally, dividends are taxed at the lower qualified dividend rate — currently a maximum of 20% for high-income taxpayers. By contrast, those same dividends flowing out of a traditional IRA face up to 37% as ordinary income on withdrawal. K-1 issuing investments also belong in the taxable account — more on that below.

Second, your cash/emergency fund and the laddered short-term bonds and CDs that make up the 15% sleeve belong here too. Between ages 65 and 72 — before RMDs kick in — fund living expenses entirely from the taxable account. The cash covers near-term needs, while maturing bond ladder rungs replenish it on a rolling basis. Meanwhile, dividends from buy-and-hold positions provide an additional income stream. Leave the IRA alone during this period and run it 100% equities, compounding tax-deferred without interruption. When bond ladder instruments mature and you spend the proceeds, you don’t trigger a taxable withdrawal the way you would pulling from a traditional IRA. The principal returns tax-free — you already paid tax on it. Only the interest portion is taxed as ordinary income. That’s far more tax-efficient than tapping an IRA where every dollar out is taxed as ordinary income.

Traditional IRA: The Right Place for Trading Positions and Tactical Rotations

The traditional IRA is the right place for stocks you actively rotate — positions held to capture a market trend, economic cycle, or short-to-intermediate-term catalyst. Inside an IRA, you buy and sell freely without triggering a capital gains event. A tactical position held six months and then sold has zero tax consequence inside the IRA wrapper. Do that same trade in a taxable account, however, and you hand a portion of the gain to the IRS — at ordinary income rates if held less than a year, or at capital gains rates if longer. As a result, the IRA lets you manage a portfolio actively without a tax drag on every decision.

Roth IRA: Your Highest-Growth Asset Allocation in Retirement

The Roth IRA is the most powerful account in the retirement toolkit — and it’s routinely underused. Because qualified Roth withdrawals are completely tax-free, the Roth rewards two things above all others: time and growth rate. Your highest-conviction, highest-growth positions — those expected to compound most aggressively over the longest period — belong here. A position that triples over 15 years generates zero tax inside a Roth. Pull that same position from a traditional IRA, by contrast, and you owe ordinary income tax on the entire amount. Most people don’t put nearly enough thought into which specific holdings they park in the Roth.

Estate Planning and the Roth IRA — A Powerful Combination

The estate planning case for the Roth is one of the most underappreciated benefits in all of retirement planning. Unlike a traditional IRA, a Roth carries no required minimum distributions during the owner’s lifetime. Consequently, your highest-growth positions compound tax-free for as long as you live — without the IRS forcing you to pull money out. When you pass the Roth to beneficiaries, they inherit it completely tax-free. Under the SECURE 2.0 Act, non-spouse beneficiaries must withdraw the full balance within 10 years. Nevertheless, every dollar of those withdrawals comes out without federal income tax.

Compare that to inheriting a traditional IRA. Every dollar a beneficiary withdraws is taxed as ordinary income at their rate, potentially pushing them into a higher bracket during their peak earning years. If you have assets to pass to the next generation, therefore, the Roth is the most tax-efficient vehicle available. Parking your highest-growth positions there isn’t just smart asset allocation in retirement — it’s smart estate planning.

K-1 Issuing Investments: Keep Them Out of IRAs

One category of investment must stay in taxable accounts: anything that issues a Schedule K-1 — master limited partnerships (MLPs), Subchapter S corporation stock, certain REITs, and other pass-through entities. Placing these inside an IRA creates a problem most investors don’t see coming: Unrelated Business Taxable Income (UBTI). When an IRA holds a K-1 issuing investment generating UBTI above $1,000, the IRA itself owes tax — filed on IRS Form 990-T. That directly defeats the purpose of the tax-deferred wrapper. Finding a CPA in most markets who files that form is nearly impossible. Using a national firm is prohibitively expensive. Avoid the problem entirely by keeping K-1 issuers out of IRAs.

Beyond the UBTI issue, many K-1 investments also pass through depreciation, depletion, and other tax-deductible items that reduce your taxable income in a taxable account. Inside an IRA, however, those deductions are completely lost — the wrapper absorbs them and you never see the benefit. For investments generating meaningful pass-through deductions, therefore, holding them outside the IRA produces better after-tax outcomes.

Why Retirement Portfolio Asset Allocation Matters Even More Right Now

The structural inflation argument I’ve been making in prior posts — centered on commodity disruptions, Middle East supply chain risk through the Strait of Hormuz, and fiscal deficits that show no signs of contracting — reinforces why bonds are ill-suited as a major retirement portfolio allocation right now. Bonds don’t capture upside from economic growth. Moreover, inflation chips away at their real value year after year. Equities with pricing power, by contrast, are far better positioned to preserve and grow purchasing power in that environment.

This isn’t a permanent case against bonds as an asset class. Rather, it’s a recognition that the 40-year bond bull market is structurally over. Retirees still running 40 to 60% in bonds carry a risk profile their account statements don’t reflect. The interest rate risk, however, can be mitigated by using laddered individual bonds and CDs instead of mutual funds — that way you always get your principal back at maturity. Still, the inflation drag on real returns is a problem in either case.

If You’re 55, Start Planning Your Retirement Asset Allocation Now

If retirement is 10 years out, the time to think about this asset allocation in retirement framework is today — not at 64. There’s still enough runway in equities to generate meaningful compounding. Additionally, there’s enough time to build a cash cushion without scrambling. Don’t load up on bonds just because retirement is a few years away. Instead, keep an adequate emergency fund on hand and invest the balance for growth, so that at retirement you have the nest egg you need.

Start by figuring out what 4% of your projected retirement portfolio looks like annually. Multiply that by four. That’s your target cash cushion and emergency fund combined. Assuming you already have a 6-month emergency fund in place, build toward the retirement cash sleeve deliberately while keeping the rest working in equities. The goal at 55 is not to get defensive. It’s to get deliberate.

If you’d like to talk through how this asset allocation in retirement framework applies to your specific situation, reach out to Joel Wallace at (217) 351-2870 or [email protected].

–Mark