Same Investments. Same Returns. $557,000 Apart. A First Look at Tax-Efficient Asset Location.

This is Part 1 of a series on tax-efficient portfolio construction. This layer covers the foundational concept — asset location — using a single, simple example. There are many more layers of tax efficiency that can be applied as you go deeper, and future posts in this series will peel back each one. If you are new here and want the broader context first, start with our Investment Philosophy page. If you are ready to dig in, read on.

The Result First

Imagine two couples. Same age. Same income. Same investments. Same savings rate. Same 30 years.

The only difference: where they put things.

After 30 years, in this hypothetical illustration, that one difference could be worth more than $557,000.

• Not from finding better investments.
• Not from timing the market.
• Not from taking more risk.
• Just from being intentional about which investments go in which accounts.

That is what tax-efficient asset location means. This post walks through how it works — starting as simply as possible, then adding detail for those who want it.

And this is just one layer. Future posts in this series will go deeper — exploring how additional adjustments, more account types, individual securities, and a well-structured retirement drawdown plan can build meaningfully on what is illustrated here. The impact compounds, in more ways than one.

The Setup — A Hypothetical Couple

For this example, consider a hypothetical couple called the Garcias. Any resemblance to actual clients is coincidental — this is purely illustrative.

Both are 35 years old. High earners in California. They save consistently across three types of accounts:

• A 401(k) — pre-tax retirement savings through work
• A Roth IRA — after-tax retirement savings
• A taxable brokerage account — a regular investment account

They want a portfolio with moderate growth for their entire investment cycle: 60% stocks, 40% bonds. They plan to keep saving for 30 years, to age 65.

They invest in just two funds:

• A total world stock market ETF
• A total bond market ETF

Same two funds. Same 60/40 split overall. The only question is: does it matter which fund goes in which account?

Two Scenarios, One Difference

Scenario 1: Uniform Allocation

Put 60% stocks and 40% bonds in every account. The same split, the same funds, everywhere. A consistent, straightforward approach that keeps everything aligned across all accounts.

Hypothetical 30-year result: $3,067,767

Scenario 2: Placement-Aware Allocation

Same two funds. Same 60/40 overall split across all accounts combined. But this time: bonds go into the retirement accounts first. Stocks go into the taxable account.

The overall portfolio is still 60% stocks, 40% bonds. Nothing changed except where each fund sits.

Hypothetical 30-year result: $3,625,414

The Difference

Hypothetical illustration only. Does not represent actual client results. See full disclosure below.

Same couple. Same income. Same investments. Same 30 years. Over half a million dollars apart.

Why?

The short answer: different types of investments are taxed differently depending on where they are held. When investments are matched to accounts where their tax treatment is most favorable, tax drag on the overall portfolio may be lower — and less drag means more compounding over time.

Keep reading to understand why. Or if you have seen enough:

• Schedule a free conversation →
• See how we think about tax efficiency overall →

Why Does Placement Matter?

Here is the core idea in plain language.

Not all investment accounts are taxed the same way. And not all investments generate taxes the same way. When those two factors align — the right investment in the right account — the overall tax burden on the portfolio's growth may be reduced.

Your Three Accounts — How They Are Taxed

401(k) — Pre-Tax Account

• No taxes when money goes in
• Ordinary income tax when withdrawals are made in retirement
• Nothing taxed while growing inside the account

Roth IRA — After-Tax Account

• Taxes already paid on money going in
• No taxes on qualified withdrawals in retirement
• Nothing taxed while growing inside the account

Taxable Brokerage Account — Pay As You Go

• Taxes already paid on money going in
• Dividends and interest taxed each year — whether spent or reinvested
• Capital gains tax owed when selling at a profit

Your Two Funds — How They Generate Taxes in a Taxable Brokerage Account

Total Stock Market ETF

• Grows mostly through price appreciation — value increases over time
• Appreciation is not taxed until the investment is sold
• Pays dividends each year, which are taxable — but qualified dividends are taxed at lower rates than ordinary income

Total Bond Market ETF

• A majority of the bond fund's return comes from interest payments, paid out regularly throughout the year
• That interest is taxed as ordinary income — the highest rate — every year
• There is no deferral — the tax bill arrives annually regardless of whether the money is spent

The Mismatch in Scenario 1

When bond funds sit in a taxable account, a high-tax type of income is placed in a high-tax environment. Every year, the fund pays out interest. Every year, tax is owed at ordinary income rates. It cannot be deferred. It quietly reduces the compounding base year after year.

The Match in Scenario 2

Bonds go into the 401(k) and Roth first. Inside those accounts, bond interest accumulates without generating an annual tax bill. The compounding is uninterrupted.

Stocks go into the taxable account. Stock growth is mostly deferred — capital gains tax is owed only upon sale, and typically at a lower rate than ordinary income. The annual tax drag on a stock fund in a taxable account is meaningfully lower than on a bond fund.

Same investments. Same overall allocation. Matched more thoughtfully to the accounts they are in.

The Numbers Behind the $557,000 Difference

The Hypothetical Couple's Situation

What Is NIIT?

The Net Investment Income Tax (NIIT) is an additional 3.8% federal tax on investment income — interest, dividends, and capital gains — for higher earners. For 2025, it applies to individuals with modified AGI above $200,000 and married couples above $250,000. It is separate from regular income tax and stacks on top of both federal and state rates. For a high-earning couple like the Garcias in this hypothetical, it applies in full.

The Two Funds and Their Hypothetical Expected Returns

Total World Stock Market ETF — Hypothetical Expected Return: 7% annually

Total Bond Market ETF — Hypothetical Expected Return: 3.65% annually

A majority of this return comes from interest income — paid out annually and taxed each year at ordinary income rates when held in a taxable account.

How Tax Drag Works on the Bond Fund in a Taxable Account

For the Garcias in this hypothetical, the combined marginal tax rate on bond interest is:

The bond fund's 3.65% hypothetical gross return, after this combined tax rate in this scenario, becomes approximately 2.16% after-tax yield — nearly half the gross return reduced by taxes, applied every year on a growing balance.

How Tax Drag Works on the Stock Fund in a Taxable Account

The stock fund's annual tax situation in a taxable account is more favorable for two reasons.

1. Price appreciation is deferred.

The 5% appreciation component is not taxed until the investment is sold. In a long-term buy-and-hold approach, this means the gains keep compounding without an annual tax bill.

2. Dividends are taxed at more favorable rates.

The stock fund generates substantially less annual taxable income as a percentage of its return than the bond fund — because most of its gain is deferred price appreciation, and its dividend income is taxed at more favorable rates. The bond fund, by contrast, delivers its entire return as interest, taxed at the highest rates, every year, without any deferral. That distinction is the foundation of why placement matters.

Scenario 1: Uniform Allocation — Starting Positions

In this scenario, $80,000 in bonds sits in the taxable account from day one, generating interest taxed at 45.1% every year. That tax drag compounds over 30 years.

Hypothetical Year 30 result: $3,067,767

Scenario 2: Placement-Aware Allocation — Starting Positions

Retirement accounts are filled with bonds first. All remaining taxable space goes to stocks.

Bond interest is almost entirely sheltered from annual taxation. Stock appreciation grows in the taxable account with deferred, lower-rate tax treatment.

Hypothetical Year 30 result: $3,625,414

Year-by-Year Comparison (Selected Years)

Hypothetical illustration only. Does not represent actual client results.

Notice how the gap grows over time. In the early years the difference is modest. By year 10 it is meaningful. By year 30 it is $557,000 — an 18.2% difference in total portfolio value — purely from placement.

This is the compounding effect of tax drag. Or looked at the other way: the compounding benefit of reducing it where possible.

This Is One Layer — There Are Many More

This post focuses on a single concept — asset location across account types using two funds. It is deliberately simple to make the principle visible.

In practice, a tax-efficient portfolio can incorporate many additional layers of refinement:

• The specific types of bonds held — Treasuries, corporate bonds, municipal bonds, California munis — each have different tax treatment that may affect where they belong
• Individual bonds rather than bond funds, which can offer additional control over timing and income
• Fund selection within each account type based on tax efficiency characteristics
• Tax-loss harvesting opportunities in the taxable account
• Low turnover strategy to defer capital gains in taxable accounts
• Roth conversion planning to manage future tax exposure

And this analysis only covers the accumulation phase — 30 years of saving to age 65. The decisions made during the retirement distribution phase can be equally important. How withdrawals are sequenced across account types, when to draw from taxable versus tax-deferred versus Roth, how RMDs interact with taxable income — these are all areas where a thoughtfully structured plan can compound the tax efficiency built during the accumulation years. A future post in this series will explore the distribution phase in detail.

This series will peel back each layer over time. This is Layer 1.

What This Means in Practice

This hypothetical uses specific numbers for a specific couple. Any individual's situation will look different — different account balances, tax rates, contribution levels, time horizons, and investment selections.

But the underlying principle is broadly applicable: when multiple account types are involved, the placement of investments across those accounts is a factor that affects after-tax outcomes — sometimes significantly, as this illustration suggests.

A few questions that may be worth considering about any portfolio:

• Are bonds or bond funds currently held in a taxable account?
• Was asset location deliberately designed, or did it develop by default over time?
• Have the accounts been reviewed together as a unified picture rather than each one in isolation?

These are the kinds of questions that tend to surface in a comprehensive financial planning review — not a one-time portfolio check. For high earners, the details matter.

• Schedule a free conversation →
• Read how we think about tax efficiency overall →
• Continue to Part 2 of this series → (coming soon)

Technical Notes and Assumptions

For those who want the full detail behind the numbers:

• Bond fund return composition: Hypothetical expected return of 3.65% = (70% × 3.5% Treasury) + (30% × 4.0% Corporate). A majority of this return is assumed to come from interest income, taxed as ordinary income annually.
• Stock fund dividend composition: 2% total dividend yield assumed. 75% qualified (taxed at capital gains rates), 25% non-qualified (taxed at ordinary income rates). 5% price appreciation assumed fully deferred until sale.
• After-tax bond yield in taxable account: 3.65% × (1 − 0.451) = approximately 2.16% in this scenario. Combined tax rate of 45.1% = 32% federal + 9.3% California + 3.8% NIIT.
• Capital gains deferral: Model defers capital gains in the taxable account — gains recognized only upon sale. Consistent with a long-term buy-and-hold approach.
• NIIT: Applied at 3.8% on investment income based on assumed income above the $250,000 married filing jointly threshold.
• Contributions: 401(k) at $49,000 annually. Backdoor Roth at $15,000 ($7,500 each). Taxable at $75,000 annually. Contributions assumed invested at the scenario's allocation.
• Municipal bonds: Not included in this layer. A future post in this series will explore how municipal bonds — including California munis — fit into a placement-aware approach for high earners in high-tax states.
• State tax deduction: No federal deduction assumed for state taxes paid, consistent with SALT limitation modeling for high earners.
• Retirement distribution phase: Not modeled in this post. A future post will address how withdrawal sequencing across account types during retirement can further compound tax efficiency.

This post is for educational purposes only and does not constitute individualized investment, tax, or legal advice. The Garcias are a fictional couple. All scenarios are hypothetical illustrations that do not represent the experience or results of any actual individual or client. Hypothetical expected returns used in this post are assumptions for modeling purposes only and are not a prediction or guarantee of future investment performance. Actual results will vary based on market conditions, individual tax circumstances, account balances, contribution levels, investment selection, and many other factors. Tax rates, laws, and regulations are subject to change and may differ materially from those used in this illustration. Tax-aware strategies are designed to be mindful of a client's tax situation but cannot guarantee specific tax outcomes. All investing involves risk, including the potential loss of principal. We do not provide tax preparation services — please consult a qualified tax professional regarding your individual circumstances before making any investment decisions. Advisory services offered through Trusted Path Wealth Management, LLC, an investment adviser registered with California. Registration does not imply a certain level of skill or training.