The wealth manager made a change last spring. Bonds moved from the taxable account into the IRA. The dividend-paying equity position moved from the IRA into the taxable account. The overall allocation stayed the same: same percentage in bonds, same percentage in equities. From a portfolio standpoint, nothing changed.
From a tax standpoint, everything changed.
What asset location means
Asset location is the practice of matching investment types to account types based on tax treatment. A bond held in a taxable brokerage account generates ordinary income every year, taxed as ordinary income. The same bond held in a traditional IRA generates no current tax: the interest compounds inside the account and is taxed only when withdrawn. A high-yield investment held in a Roth IRA generates no tax ever, on either the income or the growth.
Wealth managers use asset location to improve after-tax returns without changing the investment allocation. The percentages stay the same. The tax treatment of each position changes based on where it sits.
This is usually described as a portfolio optimization strategy. It is also, simultaneously, a tax planning decision with consequences that extend across every year the accounts are held.
The tax calendar the CPA doesn’t see
What you hold in a taxable account determines what shows up on your 1099. A bond in a taxable account produces a 1099-INT. A dividend-paying stock produces a 1099-DIV. A position that was sold produces a 1099-B with capital gain or loss. Positions held in an IRA or 401(k) produce nothing. The income accumulates inside the account, invisible to the current year’s tax return.
The asset location model is, in effect, a schedule of what income will be recognized each year. A portfolio with bonds in the IRA and growth stocks in taxable produces one income profile. The same portfolio, reversed, produces a different profile. The difference can be tens of thousands of dollars across ordinary income, qualified dividends, and capital gains, each taxed at a different rate and eligible for different planning strategies.
The CPA who is sizing a Roth conversion needs to know how much other income the portfolio will generate that year. The CPA who is planning loss harvesting needs to know what gains are likely to be recognized. The CPA who is managing IRMAA thresholds needs to know whether dividend income from the portfolio will push total income over the relevant line.
None of that analysis is possible without knowing what the asset location model is.
Where the disconnect happens
The wealth manager’s asset location model lives in the portfolio. It is documented in the investment management software. It informs rebalancing decisions throughout the year. It is not, in the standard engagement model, shared with the CPA.
Moving a high-dividend position from the IRA into the taxable account to free up IRA space for a less tax-efficient bond shifts the income profile for that year and every subsequent year. The dividend income that was previously deferred now recognizes. The CPA’s projection of current-year income is now wrong.
This happens without any failure of competence on anyone’s part. The wealth manager is optimizing the portfolio. The CPA is using the income information they have. The problem is that the income information changed, and nobody told the CPA.
What the CPA would need
A CPA doing genuine tax planning, not just accurate filing, needs two things from the investment portfolio: the current asset location model (which account holds what), and advance notice when the model changes.
With that information, the CPA can match the Roth conversion amount to the actual income the portfolio will produce, not the income it produced last year. They can size the loss harvest against the actual gains likely to be recognized, not a rough estimate. They can calculate IRMAA exposure with a complete picture of the income sources, including the portfolio’s contribution.
Without it, the planning is built on last year’s 1099, which reflects the asset location model as it existed in the prior year, not the one the wealth manager is running today.
