Updated September 26, 2026.
A taxable-account review should measure both the portfolio you own and the consequences of changing it. Allocation percentages are a starting point. Concentration, embedded gains or losses, expenses and cash needs help explain what a proposed change would mean.
These metrics do not prescribe a portfolio or a tax strategy. They make the decision easier to inspect before action.
1. Asset weights and the reporting scope
Calculate each category's value divided by the portfolio total you intend to analyze. A $120,000 stock allocation in a $200,000 account is 60%. If you add a separate $50,000 bank balance to the reporting scope, the same stock holdings become 48% of the combined total.
The holdings did not change. Label the denominator and the purpose of the bank cash so a different scope is not mistaken for reduced investment risk.
The SEC's allocation guidance connects the mix with time horizon and risk tolerance. The right metric must be interpreted in that context. Investor.gov allocation guidance
2. Direct and underlying concentration
A direct stock position can overlap with holdings inside funds. Multiply each fund position by the relevant underlying weight, add direct holdings and divide by the chosen portfolio scope.
For example, a hypothetical $10,000 direct position plus $5,000 of exposure through funds equals $15,000. In a $200,000 portfolio, that is 7.5%, even if the direct position alone appears to be only 5%.
Check holdings dates and coverage. An unknown fund exposure is not zero. For a fuller example, see how to check ETF overlap.
3. Unrealized gain or loss by relevant lot
A position's market value minus its adjusted basis gives an unrealized gain or loss, subject to accurate records. A total position can contain several lots with different dates and bases.
A headline gain percentage does not determine the tax effect of a particular sale. The actual transaction, account facts and applicable rules matter. Keep the institution's tax records and professional review separate from a dashboard estimate when needed. IRS Publication 550
Use the metric to identify questions, not as an automatic instruction to harvest a loss or avoid every gain.
4. Weighted investment expenses
Multiply the amount in each fund by its expense ratio and add the estimated dollar costs. If a hypothetical account holds $100,000 at 0.05% and $100,000 at 0.15%, the annual estimate is $50 plus $150, or $200. The weighted rate is 0.10%.
Do not add the two percentages and apply 0.20% to the entire account. Also avoid subtracting expenses twice from returns already reported net of those expenses.
The SEC's fee guide explains why the complete expense picture matters. Investor.gov fee guide
5. Liquidity relative to known commitments
Record the amount and timing of planned expenses, then identify what resources are intended to meet them. A high account value does not establish that every holding should be sold or can be accessed without cost at the needed time.
A hypothetical $25,000 upcoming expense is 12.5% of a $200,000 account. That ratio makes the scale visible; it does not decide the funding source.
Separate cash already reserved for the expense from investments intended for a longer horizon. Otherwise, an allocation tool may appear to identify idle cash that is actually committed.
Put the metrics in one decision record
| Metric | What it helps explain | What it cannot decide alone |
|---|---|---|
| Asset weights | Current mix and drift | Appropriate risk for the household |
| Look-through concentration | Combined exposure | Whether a sale is warranted |
| Unrealized gains/losses | Potential transaction questions | Final tax outcome |
| Weighted expenses | Ongoing holding costs | Whether switching is worthwhile |
| Liquidity needs | Timing and scale of obligations | Exact funding action |
The same metric can support different decisions depending on goals and constraints. A deliberate concentration or higher-cost holding needs a reason, not an automatic condemnation.
Manual tools, professional reports and AI
A spreadsheet can make formulas transparent. A professional report can connect the metrics to a defined engagement. AI can help organize the questions and explain relationships across the financial picture.
Use the same verification standard: source, date, scope, formula and missing information. A polished output should not receive a lower standard than a manual worksheet.
Do not claim that AI automatically makes a taxable portfolio compliant or optimal. Those conclusions require facts and judgment beyond a set of ratios.
Where Mezzi fits
Mezzi connects supported investments, banking, other assets and liabilities. Exposure X-Ray helps investigate supported underlying fund exposure, while AI Personalization records goals and preferences. Mezzi account groups
A useful question is: “Which of these metrics changes the decision I am considering, and what data is missing before estimating its cost?” Confirm tax-lot and other coverage rather than assuming every connected account supplies every field.
Mezzi does not execute trades or file taxes. Free includes aggregation and limited AI; Advisory is $399 annually and Concierge $999 annually. Mezzi pricing
Compare lots before treating a sale as one uniform decision
Imagine two tax lots of the same holding, each currently worth $10,000. Lot A has $4,000 of adjusted basis and Lot B has $9,000. Before fees and other adjustments, selling A would realize a $6,000 gain, while selling B would realize a $1,000 gain. The holdings have the same current market exposure but different embedded gains.
That does not automatically make B the correct sale. Holding period, the overall tax picture, lot-identification requirements, available records and the portfolio goal also matter. The example shows why an allocation percentage alone cannot establish the cost of a taxable change. IRS investment income and expense guidance
Keep market value, basis, holding period and proposed transaction in separate columns. If basis is missing from a connected tool, obtain the institution's records instead of substituting an estimate silently. If no sale is required, consider the role of future contributions in addressing the allocation question.
A strong AI or manual report preserves both layers: what the account owns now and what implementing a proposed change could involve. Precision in the first layer does not establish completeness in the second.
Review changes with context
At the next review, identify whether a metric changed because of markets, transactions, new data or a different reporting scope. Keep the earlier record so the comparison remains meaningful.
The purpose of measurement is to support a better decision. More metrics are useful only when you understand what each one says and what it leaves unanswered.
Frequently asked questions
Which allocation metric matters most in a taxable account?
There is no single universal metric. Combine allocation, concentration, relevant gains or losses, expenses and liquidity needs for the decision at hand.
Does an unrealized loss mean I should sell?
No. Review investment purpose, tax rules, transaction costs and the broader situation before acting.
How do I calculate weighted fund expenses?
Multiply each fund balance by its own expense ratio, add the dollar estimates and divide by the total balance for the weighted rate.
Does Mezzi have every tax lot for every connected account?
Do not assume so. Verify the fields and records available for the particular institution and decision.
Put your financial picture to work
Start with a question that matches this guide: Which of these metrics changes the decision I am considering, and what data is missing before estimating its cost? Connect supported accounts and add the goals behind the decision.
Explore MezziPublished by Mezzi for educational purposes. This is not personalized investment, tax, or legal advice. Prices and features were checked September 26, 2026 and can change. Comparisons use official documentation, not a matched product trial. Examples are illustrative, not customer results. Investing involves risk, including loss of principal. Account information can be incomplete or delayed. SEC registration does not imply approval or a particular level of skill.