Allocation on Paper vs in Practice

Your target allocation (60% stocks, 40% bonds) is portfolio-level. But you hold it across multiple accounts: 401(k), IRA, taxable brokerage. Strategic account placement—putting bonds in tax-deferred accounts and stocks in taxable—can improve after-tax returns by 0.3–0.5% annually.

Key takeaways

• Portfolio-level allocation is your target for the entire portfolio
• Account-level placement is where each asset sits: 401(k), IRA, taxable, RRSP, etc.
• Bonds belong in tax-deferred accounts; stocks in taxable accounts
• Higher-tax-drag assets (REITs, commodities, high-dividend stocks) belong in tax-deferred accounts
• Asset location can improve after-tax returns by 0.3–0.5% annually over a career

The distinction: portfolio vs account level

Your target allocation of 60% stocks and 40% bonds is portfolio-level. It describes the overall portfolio across all your accounts.

But you might hold this allocation across:

• 401(k): $300,000
• Roth IRA: $100,000
• Traditional IRA: $200,000
• Taxable brokerage: $400,000
• Total: $1,000,000

The question is: how do you distribute the 60/40 allocation across these five accounts?

One approach: hold 60/40 in each account. The 401(k) is 60% stocks and 40% bonds. The Roth IRA is 60% stocks and 40% bonds. The taxable account is 60% stocks and 40% bonds. This is simple and requires minimal thought.

But this is inefficient. Different accounts have different tax treatment. Bonds generate ordinary income (taxed at 37% federally in high brackets). Stocks generate capital gains (taxed at 20% for long-term gains). The taxable account cares about tax treatment; the tax-deferred accounts do not. Strategic placement can cut your tax drag in half.

Tax drag: the hidden cost

Consider a 40% bond allocation ($400,000) earning 3% per year ($12,000 in interest).

In a tax-deferred 401(k): You earn the full $12,000 annually. No tax owed until withdrawal. The bond returns compound fully.

In a taxable account (high bracket): You earn $12,000 in interest, then owe ~$4,440 in federal tax (37% bracket), leaving $7,560 after tax. You keep only 63% of the return. Over 30 years, this compounds significantly. A $400,000 bond position earning 3% tax-free grows to $970,000. The same position in a taxable account (earning only 1.89% after 37% tax) grows to $806,000. The difference is $164,000 in lost wealth due to taxes.

Stocks are different. In a taxable account held long-term, you pay capital gains tax (20%) only when you sell, and you defer the tax until sale. A $600,000 stock position earning 8% annually compounds at close to the full 8% rate because you do not pay tax until you sell. Meanwhile, in a tax-deferred account, stocks also earn the full 8% with no tax until withdrawal. So from a tax perspective, stocks are almost indifferent between taxable and tax-deferred accounts.

The key difference: bonds are tax-inefficient in taxable accounts (due to annual interest taxation). Stocks are tax-efficient in taxable accounts (due to deferred capital gains taxation).

Asset location strategy

The optimal strategy is simple:

1. Tax-deferred accounts (401(k), traditional IRA, RRSP): Hold bonds, REITs, commodities, and other high-income assets.
2. Taxable accounts: Hold low-dividend stocks, growth stocks, and index funds with low turnover.
3. Roth IRA: Hold growth stocks (the growth inside the Roth is never taxed, so you want to maximize compounding).

This ensures that high-income assets (taxed as ordinary income) sit in tax-deferred accounts where they avoid annual taxation. Low-income or deferred-income assets (stocks with capital gains) sit in taxable accounts where the tax-deferred mechanism works in your favor.

Practical implementation

Suppose you have:

• 401(k): $300,000
• Roth IRA: $100,000
• Taxable account: $600,000
• Total: $1,000,000
• Target allocation: 60% stocks, 40% bonds = $600,000 stocks, $400,000 bonds

Here is the optimal placement:

Account	Bonds	Stocks	Notes
401(k)	$300,000	—	Avoid bonds here if possible; prefer stocks. But if bonds are needed for risk management, this is the right place.
Roth IRA	—	$100,000	Hold growth stocks; the growth avoids tax forever.
Taxable	—	$500,000	Hold low-dividend, growth-oriented stocks. Use tax-efficient index funds.
Bonds (needed)	$100,000	—	If you must hold $400,000 bonds, keep first $300,000 in 401(k), then $100,000 here or in traditional IRA.

This is not possible in this example because the 401(k) is too small to hold all $400,000 in bonds. The solution: place the largest-tax-drag assets first, then fill remaining space with stocks.

Revised placement:

Account	Bonds	Stocks	Notes
401(k)	$200,000	$100,000	Hold bonds here (tax-deferred). Add growth stocks if room.
Roth IRA	—	$100,000	Growth stocks only.
Taxable	$200,000	$400,000	Bonds here as a second choice (after maxing 401k). Growth stocks dominate.

This is a compromise. You have $200,000 in bonds sitting in the taxable account (which costs you ~0.5% annually in tax drag), but the other $600,000 is optimized.

Tax-inefficient asset classes

Some asset classes are so tax-inefficient that they should almost never be held in taxable accounts:

• Bonds (interest taxed as ordinary income): 37% tax drag on returns
• REITs (required to distribute 90% of income as ordinary dividends): 37% tax drag
• Commodities (negative roll yield + high turnover creates ordinary gains): 37% tax drag
• High-dividend stocks (qualified dividends taxed at 20%, but still higher than capital gains deferral): 20% tax drag
• Actively managed funds with high turnover: Capital gains realized annually

These belong in tax-deferred accounts.

Tax-efficient asset classes that belong in taxable accounts:

• Index funds (low turnover, deferred capital gains): Minimal tax drag
• Growth stocks held long-term (capital gains deferred): Minimal tax drag until sale
• International stocks (foreign tax credits available): Can optimize tax treatment in taxable

The limitations of asset location

Asset location is valuable, but it has limits:

1. 401(k) contribution limits: Most people cannot max out 401(k)s ($23,500 in 2024) and traditional IRAs ($7,000) while also needing to hold $200,000+ in bonds. You will have some bonds in taxable accounts unavoidably.

2. Limited account flexibility: Many investors have small 401(k)s from old employers, which are stuck where they are. You cannot move bonds to these accounts if they are fully allocated to stocks.

3. Account availability: Not all investors have access to all account types. A self-employed person might have only a Solo 401(k) and taxable accounts. A Canadian might have RRSP and TFSA but no traditional IRA equivalent.

The strategy should be: do what you can with what you have. Do not sacrifice simplicity for perfect optimization.

Rebalancing with multiple accounts

Rebalancing is more complex with multiple accounts. You cannot just "rebalance the portfolio"—you have to rebalance across accounts while respecting asset location.

Here is a framework:

1. Calculate total portfolio allocation: Across all accounts, what percentage is stocks vs bonds?
2. Compare to target: Is the portfolio-level allocation in line with your target?
3. Rebalance mechanically: If portfolio is 65% stocks instead of 60%, you need to shift $50,000 from stocks to bonds across all accounts combined.
4. Respect asset location: When shifting, prefer moving bonds into 401(k) or traditional IRA, not taxable. If you must sell stocks in taxable, sell those with smallest gains (tax-loss harvesting).

This requires either a spreadsheet or a spreadsheet tool. Most robo-advisors and dedicated investment platforms can handle this automatically.

Rebalancing without triggering taxes

A clever approach to rebalancing across accounts: use new contributions.

If you contribute $500 per month and the portfolio is overexposed to stocks, direct the contribution to bonds. This rebalances the portfolio without selling anything and without triggering taxes. Over time, new contributions naturally restore allocation.

This is especially valuable for regular savers. If you are young, working, and contributing $1,000+ per month to a 401(k), you can rebalance through contributions alone. By the time you hit peak savings at age 45, the portfolio may naturally be back to target without ever having sold.

The "bucketing" approach

Some investors use a "bucketing" or "time-horizon" approach to asset location:

• Bucket 1 (0–3 years): Cash and short-term bonds (VMFXX, SCHP)
• Bucket 2 (3–10 years): Intermediate bonds and some stocks (BND, VTI 50/50)
• Bucket 3 (10+ years): 100% stocks (VTI, VXUS)

Each bucket sits in a designated account:

• Bucket 1: Taxable account (cash is tax-efficient)
• Bucket 2: Traditional IRA
• Bucket 3: Roth IRA and 401(k)

This approach separates time horizon from asset location, and many investors find it psychologically cleaner. "Sell bonds from Bucket 2 annually to refill Bucket 1" is a simple rule that avoids constant optimization.

The tradeoff: bucketing is less tax-efficient than pure asset location (because you may hold stocks in traditional IRAs instead of Roth), but it is simpler and less error-prone.

Decision tree for asset location

Related concepts

• ./01-what-is-asset-allocation.md
• ./23-allocation-drift-and-rebalancing.md

Next

This completes our exploration of asset allocation strategies. In the next chapter, we'll build on these foundations by examining how to implement these allocations in practice across different account types and brokers.