How Should RIAs Choose a Tax-Managed Account Structure That Holds Fixed Income, SMAs, and Funds Under One Client Tax Budget?

What Is a Tax-Managed Investment Account, and How Does It Reduce Taxes? 

A tax-managed investment account is a taxable account run with the client's after-tax result as a goal alongside the pretax return. The manager sells securities that have lost value to create tax losses, avoids selling positions with large gains unless the client agrees to the cost, and watches how far each trade moves the portfolio from its target. 

Tax-managed accounts reduce taxes in four ways: 

• Realized losses offset realized gains, which lowers the tax due in the current year 
• Gains are spread across years or held, which defers the tax 
• Positions are chosen and sold by tax lot, so the highest-cost lots go first 
• Restrictions and the client's own tax rates guide each trade 

An RIA's version of this question is broader than the account type. Most clients hold several vehicles at once, such as stocks, funds, bonds, and manager strategies. The account structure decides whether tax management reaches all of them or only one. 

Vestmark sees this from the infrastructure side. VestmarkONE, its tax-lot level sleeve accounting engine, supports six of the top 10 managed account program sponsors. VAST is Vestmark's outsourced tax-managed service, delivered through Vestmark Advisory Solutions (VAS). The sections below use that view to compare account structures by what they can hold and how far tax management reaches.

What Does the Best Tax-Managed Investment Account Look Like? 

The best tax-managed investment account for an RIA fits each client's tax situation and holds up across a book of taxable accounts. 

It has six traits: 

• It can hold the vehicles the client owns, including direct index SMAs, equity and fixed income SMAs, funds, and ETFs 
• Tax management covers every sleeve, so a loss in one can offset a gain realized in another 
• The client's dollar tax budget and personal federal and state rates guide each trade 
• Fixed income gains count against the same budget as equity gains 
• Existing holdings move into the target allocation over time instead of in one sale 
• Reporting shows the account as a whole, with realized gains and losses next to the budget 

Vestmark built VAST around these traits. The sections below turn them into account structures, comparison points, warning signs, and questions for providers.

What Types of Tax-Managed Accounts Can RIAs Choose From?

RIAs usually encounter five account structures. The structure determines which vehicles the account can hold and how far tax management reaches inside it.

What Should RIAs Compare in Tax-Managed Accounts?

Every tax-managed account can show a harvested loss. The comparison becomes useful when it moves to what the account holds and what governs the trades. Vehicle coverage, fixed income treatment, and who sets the tax limit decide whether the account serves the client's whole portfolio or only a slice of it.

Operational points, such as minimums, reporting, and onboarding, decide whether the structure works across a book of business or in a few showcase accounts. The table below lists nine comparison points, what each one enables, and why it matters for an RIA's practice.

To compare accounts side by side, ask each provider the same questions from the vendor table later on this page and score the answers against these dimensions. Vestmark's position: VAST holds multiple vehicles in one account and applies the client's tax budget and personal tax rates across all of them.

Which Clients Benefit Most from Tax-Managed Accounts, Including Clients with High Taxable Income? 

Tax management has the most value in taxable accounts, where gains and income are reported each year. Clients who gain the most from a tax-managed account tend to share a few traits: 

• High taxable income, which puts gains and bond interest in higher federal brackets and may add the net investment income tax 
• Residence in a state with income tax, which raises the value of each loss 
• Appreciated holdings from a prior advisor, an employer, or an inheritance 
• A regular need to sell, for goals such as a home purchase or a business investment 
• Taxable fixed income, where interest is usually taxed as ordinary income 

Accounts that are already tax-deferred, such as IRAs, gain little from loss harvesting, because gains and losses inside them are not reported each year. Many RIAs use the household as the planning unit. The tax-managed account handles the taxable assets, and the tax-deferred accounts hold the holdings that would otherwise create taxable income. 

Vestmark Proposals supports this household view. It lets an advisor propose and enroll multiple accounts in a tax-managed program and shows the tax-aware path from current holdings to the target allocation for each account.

What Is a Tax-Managed Separately Managed Account, and How Does It Work? 

A separately managed account (SMA) is an account where the client owns the individual securities, and a manager chooses and trades them. A tax-managed SMA adds a tax-aware process on top. Because the client owns the securities directly, each purchase has its own tax lot, and the manager can decide which lots to sell and when. 

A tax-managed SMA works through four steps: 

1. The manager sets a target portfolio, such as an index, a factor tilt, a value strategy, or a bond ladder 
2. The system tracks the cost basis of each lot 
3. When a position falls below its cost, the manager can sell it to create a tax loss and buy a similar holding to keep the portfolio close to its target 
4. When the portfolio needs rebalancing, the manager sells high-cost lots first and weighs the tax cost of each sale against the tracking error it removes 

In Vestmark's terms, an SMA is one account assigned to one manager or model. A unified managed account (UMA) is one account assigned to multiple managers or models in a multi-sleeve structure.

Are Separately Managed Accounts Better Than Mutual Funds for Taxable Investing?

For many taxable clients, yes, because an SMA gives the client control over when gains are realized. A mutual fund pools many investors, and the fund can distribute gains to all of them in a given year, including investors who bought recently and did not benefit from the appreciation.

ETFs generally distribute fewer gains because of how shares are created and redeemed, but the investor still cannot harvest losses inside the fund.

What Does a Tax-Managed UMA Add to a Single SMA? 

A single tax-managed SMA manages taxes inside one strategy. A client with an SMA, a bond sleeve, and a fund holding has three separate tax pictures, and no one is netting them against each other. 

A tax-managed UMA puts the strategies into one account. It merges different model portfolios, individual SMAs ("sleeves"), ETFs, and cash into one account with centralized reporting and portfolio-wide tax coordination. 

For tax purposes, that changes three things: 

1. A loss in one sleeve can offset a gain realized in another 
2. One tax budget governs the account, in place of one budget per strategy 
3. The account has one set of client restrictions and one reporting view 

Vestmark's UMA combines mutual funds, ETFs, actively managed SMAs, direct indexing, interval funds, and semi-liquid, subscription-based alternatives in a single account. VAST also applies a tax overlay to any strategy that can be delivered as a model portfolio. 

For RIAs, the practical result is that picking the best SMA for a client does not require picking a separate tax process for it.

How Does Direct Indexing Fit Inside a Tax-Managed Account? 

Tax-optimized direct indexing means owning the securities of an index in an SMA and using an optimizer to decide what to sell and when, with the client's tax situation as an input. It can reduce taxable gains by creating losses on individual stocks even when the index rises, which can offset gains realized elsewhere. Whether it is worth it for loss harvesting depends on the client having gains to offset, how often the account is optimized, and the fee. 

In a tax-managed account, direct indexing is one sleeve among several. The question for an RIA is whether the harvesting stops at the edge of that sleeve. In VAST, direct indexing works alongside the account's other assets, and tax management and optimization apply across the entire allocation. 

For a full comparison of direct indexing providers, see How Should RIAs Choose a Direct Indexing Provider That Coordinates Tax Management Across the Entire Account?

How Does Tax-Loss Harvesting Work Across the Vehicles in a Managed Account? 

Tax-loss harvesting means selling a security at a loss, buying a similar holding to keep the portfolio's exposure, and using the realized loss to offset gains. In a managed account, the process runs on tax lots, which is why SMAs and direct indexing create more opportunities than a single fund share does. 

Harvesting can improve after-tax returns when the client has gains to offset and the loss is large enough to cover trading costs. It compares well with holding an index fund when the account has many lots and frequent price swings, because the fund offers no individual losses to harvest. The benefit is often a deferral. A harvested loss lowers the cost basis of the replacement holding, so more gain is recognized when it is later sold. 

The risks are specific: 

• The replacement investment can perform worse than the one sold 
• Transaction costs can offset the tax benefit 
• A wash sale can disallow the loss if a substantially identical security is bought within the wash sale window 
• Market conditions may not produce losses to harvest 
• Tracking error can grow if tax decisions pull the portfolio away from its target 

The question for an account structure is how many of the client's vehicles harvesting covers. In VAST, all taxable portfolios are screened daily across the entire unified managed account, so harvesting is not limited to one sleeve. 

For the full explanation, see How Does Tax-Loss Harvesting Work, and How Can It Fund a Portfolio Transition for RIA Clients?

What Is Tax-Aware Fixed Income, and Which Options Suit Taxable Accounts?

Tax-aware fixed income means choosing and managing bonds with the after-tax yield in mind. In a taxable account, bond income is usually the largest recurring tax item, so it affects the whole account's tax result. When comparing tax-aware fixed income options, check after-tax yield, turnover, distribution history, the share of income that is tax-exempt, and whether the vehicle matches the client's state of residence.

The main options for a taxable account are explained in the table below.

Should Taxable Bonds Be Held in a Managed Account? 

For a taxable client with a meaningful bond allocation, a managed account is often worth considering, but it depends on the size of the allocation, the bond type, and what else the account holds. 

A managed account can make sense when: 

• The client's allocation to bonds is large enough to meet the manager's sleeve minimum 
• The client wants a state-specific or maturity-specific bond ladder that a fund does not offer 
• The client holds appreciated bonds and wants to exit them over time 
• The advisor wants one tax budget and one report for the whole portfolio 

A fund or ETF may be the better choice when the allocation is small, when the client needs daily liquidity and simplicity, or when the account is tax-deferred. 

For many municipal strategies in taxable accounts, turnover is low, so the sleeve may rarely realize gains once it is set up. The sensitive moment is the start, when an account funded with existing bonds meets the manager's target allocation. At that point, selling the old bonds can realize gains that the client's tax budget has to absorb.

How Does Fixed Income Fit Under a Client's Tax Budget in a Vestmark UMA? 

Fixed income is where many tax-managed accounts break down. The equity side is optimized, and the bond sleeve is traded by a separate manager who may not know the client's tax limit. The result can be a bond sale that realizes more gain than the client agreed to pay, before the equity side has traded. 

Vestmark handles the sleeve as part of the account. Its public Investment Advisory page describes fixed income as a solution that lets firms include fixed income assets in a tax-aware manner alongside equities within a UMA structure. 

In practice, that rests on four things: 

1. A manager-traded fixed income SMA can sit in the same UMA as a direct index SMA, a model-delivered equity SMA, ETFs, and cash 
2. The client's capital gains budget or Tax Reserve applies to the whole account, so the bond sleeve and the equity sleeves draw on one limit 
3. When an account is funded with bonds, Vestmark Proposals calculates a minimum capital gains budget based on the unrealized gains in those bonds and warns the advisor if the budget entered is below it 
4. Vestmark's proposal workflow separates the budget into equity and fixed income components, so a bond sleeve's expected gains are counted before equity trades are planned 

Two questions remain open for any provider, and an RIA should ask both. The first is who performs loss harvesting inside the bond sleeve. In a manager-traded sleeve, the asset manager makes the trades, so harvesting there depends on the manager and on the data the platform gives it, such as lot-level cost basis. 

The second is how existing bonds are handled at enrollment. An account that arrives with appreciated municipal bonds needs a plan for moving them without exceeding the client's budget.

Why Does Account Structure Matter for RIAs? 

A tax-managed account touches several systems and teams at once, including: 

• Custodian feeds that supply cost basis and tax lot data, including bond adjustments 
• The optimizer that proposes sells and replacement buys 
• The strategies and managers that sit in each sleeve 
• Client restrictions and values-based screens 
• Household and account group structures 
• Reporting on realized gains and losses and tax savings 

Without coordination across those pieces, RIAs often experience: 

• Tax management that works inside one sleeve while gains elsewhere in the account are taxed in full 
• A bond sleeve that realizes gains before the equity side knows the budget is spent 
• Separate accounts for each strategy, each with its own tax picture and statement 
• Wash sales created across related accounts 
• Advisors who cannot show what the structure saved a client

What Are the Warning Signs of a Weak Tax-Managed Account Structure?

A weak structure is hard to spot in a demo, because a demo shows one sleeve doing well. The signs show up in what the provider says about scope, fixed income, and reporting.

An RIA can check most of them in a proposal, a sample account, and the provider's reporting. The table below pairs each sign with what it costs the firm in practice.

How Does the Right Account Structure Support an RIA's Growth? 

• Advisors can show taxable prospects with appreciated stocks and bonds a plan for moving into a tax-managed account over time 
• Advisors can ask clients "what are you willing to pay in taxes this calendar year?" and get an answer the account enforces 
• Daily optimization runs in the overlay, which reduces the time advisors spend on tax-lot review 
• One account can serve a client as their needs change, from a simple model to a multi-sleeve portfolio 
• Advisors have one set of reports to bring to client reviews 

A firm that can place a client's stocks, funds, and bonds in one tax-managed account gives that client a clear reason to consolidate assets.

How Does Vestmark Approach Tax-Managed Investment Accounts? 

Vestmark delivers tax-managed accounts through VAST, part of Vestmark's Investment Advisory solutions, managed by Vestmark Advisory Solutions (VAS) and run on VestmarkONE. 

Within VAST: 

• Direct indexing, equity and fixed income SMAs, mutual funds, ETFs, interval funds, and subscription-based alternatives can sit in one account 
• Tax-managed overlay is available for any strategy that can be delivered as a model portfolio, and advisors can draw on thousands of third-party strategies through Vestmark's Model Marketplace 
• Manager-traded fixed income sleeves can sit beside the account's other sleeves, with the client's tax budget applied across the account 
• All taxable portfolios are optimized daily, with no lockup period following a harvest event 
• Tax management applies across the entire unified managed account, including the SMAs, funds, and legacy holdings beside the direct index sleeve 
• Advisors can enter a capital gains budget or a Tax Reserve, which is the amount a client is willing to pay in capital gains tax in the current calendar year 
• Decisions use the client's personal federal and state tax rates, with defaults applied when income and state of residence are not available 
• A tax transition service moves appreciated legacy holdings into the target allocation over time 
• Vestmark Proposals supports household-level proposals with a transition analysis for each account 
• Security, sector, and industry restrictions are honored through optimization 
• Outsourced tax management and fixed income transactions are conducted through the Vestmark platform 

Through VAS, Vestmark supports more than $50 billion in advisory assets on a platform used by more than 72,000 financial advisors.

How Should RIAs Evaluate Tax-Managed Account Structures When Selecting One? 

1. What can the account hold, and does tax management reach all of it? 

If the account holds only a direct index sleeve and ETFs, the client's SMA, bond, and legacy holdings sit outside the tax process. 

2. How does the account treat fixed income? 

A bond sleeve that trades without regard to the client's tax budget can realize gains before the equity side acts, and the advisor learns about it afterward. 

3. Whose numbers drive the tax limits? 

If the answer is a flat percentage of gains and a top federal rate, advisors will be recalculating by hand, and the result will not match what the client agreed to pay. 

4. How do existing holdings move into the account? 

A structure that cannot move appreciated stocks and bonds over time forces a choice between a large tax bill and leaving assets elsewhere. 

5. What does the client see? 

An account that reports each sleeve on its own leaves the advisor to assemble the household picture before each review.

What Questions Should RIAs Ask Providers About Tax-Managed Accounts?

Explore Tax-Managed Accounts with Vestmark 

RIAs comparing tax-managed account structures can see how VAST applies one client tax budget across direct indexing, SMAs, funds, ETFs, and fixed income. Learn more about Vestmark's Investment Advisory solutions, or visit Vestmark's page for RIAs.

Key Takeaways 

• The best tax-managed investment account holds every vehicle the client owns and applies one tax budget across all of it. 
• An SMA gives a taxable client control over when gains are realized, and a UMA extends that control across several strategies. 
• Fixed income deserves its own question. Check whether bond gains count against the same tax budget as equity gains. 
• Tax-deferred accounts gain little from loss harvesting, so match the program to the account type. 
• Compare sleeve minimums and fees by vehicle, because a headline account minimum can hide the real entry point. 
• VAST holds direct indexing, SMAs, funds, ETFs, and fixed income in one UMA, optimizes taxable accounts daily, and applies the client's tax budget and personal rates across the account.

_{Important Disclosures: Vestmark Advisory Solutions, Inc. ("VAS") is an SEC-registered investment adviser subsidiary of Vestmark, Inc., acting as a paid sub-advisor and/or overlay portfolio manager offering VAST and tax optimization services. Investing involves risk, including loss of principal; past performance does not guarantee future results. Tax-loss harvesting involves the risks that the new investment could perform worse than the original investment and that transaction costs could offset the tax benefit. Investment strategies that seek to enhance after-tax performance may be unable to fully realize strategic gains or harvest losses. There are limitations inherent in the use of an optimization methodology to manage accounts relative to a designated index, and direct index accounts can deviate from the index. Optimization tools may seek to estimate individual tax circumstances but cannot incorporate all individual tax information, which can lead to inaccuracies. There is no assurance that a separately managed account will achieve its investment objective, and SMAs are subject to market risk. UMAs are not suitable for all investors. The tax rules described on this page are general and may not apply to every client. They are not tax advice, and clients should consult a tax professional.}