A neutral 70/30 stance across the household does not mean each account should be 70/30. Once your allocation is set, a second, quieter decision determines a meaningful share of your after-tax return: which account holds which asset.
Two Different Questions
Asset allocation asks how much risk to take — the mix of stocks, bonds, and alternatives that matches your goals and time horizon. Asset location asks something different: once that mix is decided, which account should hold each piece of it? A Traditional IRA, a Roth IRA, and a taxable brokerage account are taxed in three fundamentally different ways, and the same investment produces a different after-tax outcome depending on where it sits.
It's entirely possible for two households to hold an identical 70/30 portfolio on paper and end up with meaningfully different results after tax, simply because one placed bonds in the taxable account and growth stocks in the IRA, while the other did the reverse. Allocation decisions should not be made from a risk standpoint alone — the account structure underneath the allocation matters just as much.
The Three Account Types, and How They're Taxed
Every account a household holds falls into one of three tax treatments, and each rewards a different kind of return:
- Taxable brokerage. Dividends and interest are taxed annually as earned. Capital gains are taxed only when realized, and long-term gains receive preferential rates. Basis can also step up at death, permanently erasing embedded gains for heirs.
- Traditional IRA / 401(k). Growth compounds without any annual tax drag, but every dollar withdrawn in retirement — regardless of whether it came from interest, dividends, or appreciation — is taxed as ordinary income.
- Roth IRA. Growth compounds tax-free, and qualified withdrawals are never taxed at all. This is the account where the value of tax-free compounding is highest.
Because each account treats income and growth so differently, the same holding can be a poor fit in one account and an ideal fit in another. Asset location is the discipline of matching each asset's tax character to the account that neutralizes — or best rewards — that character.
Where Each Asset Class Is Most Efficiently Held
Holding risk constant, the table below shows the general placement that minimizes unnecessary tax drag across a household's accounts.
| Asset class | Taxable brokerage | Traditional IRA | Roth IRA |
|---|---|---|---|
| Ordinary-income producers | |||
| Taxable bonds | Costly | Best fit | Fine |
| Private credit funds | Costly | Best fit | Fine |
| Public REITs | Fine | Best fit | Fine |
| Derivative income (JEPI) | Costly | Best fit | Fine |
| High-turnover active funds | Costly | Best fit | Fine |
| Already tax-sheltered | |||
| Municipal bonds | Best fit | No benefit | No benefit |
| Direct real estate, LP interests | Best fit | No benefit | No benefit |
| Capital-gains growth | |||
| Private equity, venture | Best fit | Costly | Fine |
| Broad equity index funds | Best fit | Fine | Fine |
| Individual stocks | Best fit | Fine | Fine |
| Highest-growth assets | Fine | Fine | Best fit |
Best fitMost efficient home · CostlyPays unnecessary tax · No benefitTax shelter is redundant here · Fine — no meaningful drag either way
Reading the Table: Three Simple Patterns
1. Ordinary-income producers belong in the Traditional IRA
Taxable bonds, private credit funds, public REITs, derivative-income strategies, and high-turnover active funds all share one trait: they generate returns that are taxed annually at ordinary rates, whether or not you touch the position. Held in a taxable account, that income is costly every single year. Held in a Traditional IRA, the same income compounds without any annual tax bill — you simply pay ordinary rates later, when you withdraw.
2. Assets that are already tax-efficient don't need a tax shelter
Municipal bonds and directly held real estate (with its depreciation and eventual step-up in basis) are already structured to minimize tax drag on their own. Putting them inside a Traditional or Roth IRA doesn't just fail to help — it can actively hurt, converting tax-free muni interest or step-up-eligible gains into fully taxable ordinary income down the road. These assets are best left in the taxable account, where their built-in efficiency is preserved.
3. Your highest-conviction growth belongs in the Roth
A Roth IRA's advantage — tax-free growth, forever — is worth the most when applied to the assets with the greatest expected appreciation. Broad index funds and individual stocks are generally fine anywhere, since long-term capital gains rates are already favorable. But the assets you expect to compound the fastest belong in the Roth specifically, because every dollar of that growth escapes tax entirely rather than being taxed once, eventually, at capital gains or ordinary rates.
When to Deviate From the General Rule
These placements are guidelines, not mandates. Plenty of circumstances warrant a different answer:
- Embedded unrealized gains. The tax cost of selling a position to reposition it into the "right" account can exceed the ongoing benefit of relocating it. Sometimes the correct move is to leave a mismatched holding exactly where it is.
- Step-up in basis at death. An appreciated position held in a taxable account may be better left there — heirs receive a stepped-up basis and can sell with little or no capital gains tax, an advantage that disappears entirely for assets inside a Traditional IRA.
- State tax treatment. Some states tax municipal bond interest and retirement account withdrawals differently, which can shift the math for residents of high-tax states.
- Charitable giving plans. If you intend to give appreciated stock or fund a donor-advised fund, holding that stock in a taxable account preserves the ability to give it in-kind and avoid the gain entirely.
- Concentration and wash-sale constraints. A concentrated position or an active harvesting strategy may need to stay in a specific account type to preserve tax-loss harvesting flexibility.
- Planned withdrawal sequencing. The order in which you intend to draw down accounts in retirement can argue for a different placement than the standard rule.
- Platform or account-level availability. Not every custodian or plan offers every asset class inside every account type.
- Your current tax bracket. If your tax picture warrants it — say you're in a very low bracket this year, or you have significant ordinary-income deductions — the annual cost of holding an ordinary-income producer in a taxable account shrinks considerably, and it may make sense to bend the general rule.
Asset location should be evaluated within the full financial plan rather than applied mechanically, and any repositioning should be modeled before it is executed — the tax cost of getting there can sometimes outweigh the benefit of arriving.
Why This Gets Missed
Most portfolio conversations stop at allocation because allocation is the visible number — the pie chart, the stock/bond split, the risk score. Location is invisible in a quarterly statement; you have to look account by account to see it. It also requires coordinating across custodians and account types that are often opened at different times, for different reasons, without a unifying plan.
The result is that asset location is one of the more overlooked sources of after-tax return — not because it's complicated in concept, but because it requires viewing every account in the household as a single portfolio rather than a collection of separate ones.
The Rubiq Approach
We treat every account a household holds — taxable, Traditional, Roth, trust, and any spouse's accounts — as one unified portfolio rather than a set of separate ones. Once the household-level allocation is set, we place each holding in the account that minimizes unnecessary tax drag, following the general patterns above while weighing the deviations that apply to your specific plan: embedded gains, estate intentions, charitable goals, and withdrawal sequencing.
This location-aware approach also feeds directly into how we rebalance and how we harvest losses — knowing which accounts hold which assets determines not just where a holding sits today, but which account is the right place to trade when drift or a harvesting opportunity arises.
