Welcome to Lumvest

Tax-loss harvesting analysis for portfolios

A transparent, rules-based analysis identifying tax-loss harvesting signals for financial advisers and investors.

Start Analysis

G2

620+ Reviews

How it works

Simple and efficient

Designed for straightforward use. No account required.

Step 1

Upload historical trade data
‍

Upload a CSV of historical ETF trades to initialise the analysis.
‍

Step 2

Automatically calculate tax-loss harvesting signals

The system applies a rules-based methodology to compute unrealised losses and identify tax-loss harvesting opportunities.

Step 3

Access full results and report
‍

Access the complete tax-loss harvesting analysis and download a report for review or documentation.

What is tax-loss harvesting?

Tax-loss harvesting is a strategy designed to maximize after-tax returns by selling investments at a loss to offset capital gains elsewhere. This means less tax paid and more capital to invest and potentially grow.

Learn More

Tax-loss harvesting can increase the after-tax return on your stocks by up to 29%, based on our analysis of a Vanguard study.

Financial advisor reviewing an investment performance chart in the office.

Identify signals with clarity and control.

Open Calculator

Deterministic tax-lot selection process to calculate realised gains and surface unrealised loss signals.

Re-Entry Risk Detection to surface temporal proximity between sales and subsequent acquisitions.

Exposure similarity analysis to map highly correlated replacement assets.

FAQ

How does the analysis identify tax-loss harvesting signals?

The analysis reconstructs historical tax lots using deterministic rules and evaluates open positions for unrealised losses that meet predefined mechanical thresholds. Where relevant, it also compares exposures to identify non-identical assets with high historical correlation, without making execution or suitability assumptions.

Does the platform execute trades or provide tax advice?

No. The platform performs analytical computations only. It does not execute trades, provide investment or tax advice, or determine whether one asset should be replaced by another. All outputs are intended for professional review and documentation.

What factors influence the results shown in the analysis?

Results depend on the trade history provided, current market prices, configured thresholds, and portfolio composition. Exposure similarity is assessed using statistical measures of correlation and does not imply identical risk, return, or tax treatment. Outcomes may vary based on market conditions and individual circumstances.

How accurate is the analysis if trade data is incomplete or inconsistent?

The analysis reflects only the trade data provided. Missing trades, incomplete histories, or inconsistent pricing may affect tax-lot reconstruction and downstream results. The platform highlights data issues where possible, but accuracy ultimately depends on input completeness.

Are the results specific to any tax jurisdiction?

No. The core analysis is jurisdiction-agnostic and focuses on mechanically observable portfolio data. Jurisdiction-specific tax treatment, rates, and legal interpretations are intentionally excluded and must be assessed separately.

How are exposure similarities measured?

Exposure similarity is assessed using historical correlation and related statistical measures. Assets identified as highly correlated are not identical and may differ in index construction, risk characteristics, and tax treatment. Where applicable, the analysis presents exposure alternatives as informational options for user review and decision-making.

What assets are assessed for exposure similarity?

Exposure similarity analysis is currently limited to exchange-traded funds (ETFs). The platform does not assess or present exposure alternatives for individual stocks, bonds, or other securities. However, realised gains and losses are calculated across all supported asset types provided in the trade data, including stocks and bonds.

Get started

Lumvest provides analytical software tools for informational and educational purposes only. The platform performs deterministic, rules-based analysis of user-supplied trade data and presents mechanically identifiable signals related to tax-loss harvesting. Lumvest does not provide investment advice, tax advice, legal advice, accounting advice, or financial planning services. Nothing on this website or generated by the platform should be construed as a recommendation, solicitation, endorsement, or opinion regarding the purchase, sale, holding, or replacement of any security or financial instrument. The platform does not execute trades, manage portfolios, determine suitability, assess investor objectives, or apply jurisdiction-specific tax laws or rates. All outputs are intended for professional review and independent evaluation. Any decisions made based on the information provided are the sole responsibility of the user. Exposure similarity analysis is based on historical correlation and related statistical measures. Assets identified as highly correlated are not identical and may differ materially in index construction, risk characteristics, liquidity, expenses, and tax treatment. Any exposure alternatives presented are provided for informational purposes only and do not constitute recommendations.Results depend entirely on the completeness and accuracy of the data provided, current market prices at the time of analysis, and configured analytical parameters. The platform does not predict future market performance, tax outcomes, or investment results. Past performance and historical analysis are not indicative of future results.Tax-loss harvesting may not be suitable for all investors and its effectiveness varies based on market conditions, portfolio composition, tax regimes, and individual circumstances. Tax laws and regulations are subject to change and may differ by jurisdiction.Users should consult their own qualified investment, tax, legal, and financial professionals before making any financial decisions. Use of this platform constitutes acceptance of these limitations.