Wealth Building · 12 min read
The Taxable Account, Done Properly
Tax drag, asset location, and the powers your 401(k) will never have
The Account With No Contribution Limit
Max every account available to a two-physician household and the space is larger than most people guess: two deferrals at $24,500 each, two IRAs at $7,500 each, and a family at $8,750 comes to $72,750 — and if one hospital offers a 457(b), another $24,500 brings it to $97,250, with employer contributions pushing the true total past $100,000 (IRS Notice 2025-67). Yet a dual-attending household saving 30% of $700,000 needs to put away $210,000 a year. The overflow — often six figures — lands in a taxable brokerage account, and the rules change there. Every dividend arrives with a tax bill attached. Every fund distribution is taxable the year it is paid, whether you reinvest it or not. Every sale is a reportable event. But the account also holds powers the 401(k) will never have: capital-gains rates instead of ordinary rates, no required distributions at any age, penalty-free access decades before 59½, and a basis step-up at death. This module teaches you to run it properly, because the gap between a well-run taxable account and a carelessly run one compounds into six figures.
Tax drag
The annual return lost to taxes on dividends and capital-gain distributions a fund pays out each year — a recurring cost that compounds against you, separate from any tax due when you eventually sell.
In a , a fund can trade constantly and you feel nothing until withdrawal. In a taxable account, the fund's behavior becomes your tax bill. Mutual funds are required to distribute their realized net capital gains to shareholders every year, and you owe tax on those distributions even if you reinvest every cent. Structure therefore matters as much as strategy. A broad stock index fund holds hundreds of companies and rarely sells, so it typically distributes little beyond a roughly 2% dividend, most of it qualified and taxed at capital-gains rates. An actively traded fund may turn over a large share of its portfolio in a year, pushing out short-term gains taxed at your full ordinary rate. Exchange-traded funds add a second layer of efficiency: when large investors redeem, the ETF hands them appreciated shares in kind instead of selling those shares, which purges the lowest-basis holdings without a taxable sale. That in-kind redemption mechanism is why broad index ETFs rarely distribute capital gains at all, while actively traded mutual funds often distribute them every year.
Why it matters: Tax drag is the one investment cost you control completely at purchase time. Two funds with identical holdings and identical gross returns can differ by roughly 1.8 percentage points per year after tax at attending income, as the worked example that follows shows. Unlike market risk, this cost is voluntary: you pay it only if you place a tax-inefficient structure inside a taxable account.
Two Funds, the Same 7%, $517,980 Apart
A dual-physician household, MFJ, $460,000 taxable income, invests $500,000 of overflow savings for 20 years.
Bottom line: On identical 7% gross returns, the tax-inefficient structure surrenders $517,980 over 20 years — money lost not to the market but to annual taxation and the compounding it forecloses.
Asset Location: The Household Is One Portfolio
Set your overall allocation first — that decision lives in the asset-allocation module. Asset location is the separate, second decision: given that allocation, place each holding in the account where it is taxed least. Do not balance each account individually. Treat every account in the household as one portfolio and let the taxable account hold what it shelters well.
| Account | Belongs here | Why |
|---|---|---|
| Taxable brokerage | Broad stock index funds and ETFs; municipal bond funds if you are in the 35% or 37% bracket | Qualified dividends are taxed at 15–20% instead of 32–37%; gains defer until you choose to sell; heirs receive a basis step-up; municipal interest is federal-tax-free and excluded from NIIT |
| Tax-deferred (401(k), 403(b), 457(b)) | Taxable bond funds, REIT funds, and any actively managed fund you insist on keeping | Bond interest and most REIT dividends are taxed as ordinary income anyway, so the wrapper costs nothing — and it makes an active fund's heavy annual distributions invisible |
| Roth | Your highest-expected-growth assets | Growth is never taxed again, so each dollar of expected return is worth the most here, and no required minimum distributions ever force money out |
Two Default Settings That Cost Real Money
First, the year-end distribution surprise. Actively traded mutual funds declare their capital-gain distributions in November and December. Buy such a fund in a taxable account in late November and you can receive — and owe tax on — a distribution of gains the fund realized before you ever owned it. A $100,000 purchase ahead of a 5% distribution hands you a $5,000 taxable distribution, up to $1,790 of tax at 35.8%, for gains you never enjoyed. Second, the cost basis default. Many brokerages default mutual fund positions to the average cost method. Sell without electing specific-lot identification and you cannot choose which shares you sold: high-basis lots that could have produced a deductible loss are averaged away, and the loss is wasted.
How to avoid it: Before any fourth-quarter fund purchase in a taxable account, check the fund company's published distribution estimate and, if it is material, wait until after the record date. Separately, log in to your brokerage and set the cost basis method on every taxable holding to specific-lot identification before your first sale — practice has varied on switching after an average-cost sale, so confirm with your brokerage. Then choose lots deliberately every time you sell.
Check: Why the ETF Paid Nothing
This step is a quick self-check. Open the full module to try it with your numbers →
The Taxable Account's Honest Superpowers
- Tax drag is a structural choice: in the worked example, a tax-inefficient fund surrendered $517,980 on $500,000 over 20 years despite identical assumed 7% gross returns.
- Locate assets across the whole household: stock index funds and ETFs in taxable, taxable bonds and REITs in tax-deferred accounts, and the highest-expected-growth assets in Roth.
- Set specific-lot identification before your first sale, and check a fund's year-end distribution estimate before any fourth-quarter purchase in a taxable account.
- The account's powers are real and rule-based: 15–20% rates on qualified dividends and long-term gains, no required minimum distributions ever, liquidity before 59½, and a basis step-up at death.
Do this next: Log in to your brokerage this week and change the cost basis method on every taxable holding from average cost to specific-lot identification.
Run this with your own numbers
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