AI coding tools make it easier than ever to build your own portfolio tracker. The bigger question is whether you also want to maintain everything behind it over the years ahead.
You Can Build Your Own
Building your own portfolio tracker can be a perfectly reasonable choice. Modern tools, including AI coding assistants, can help you create dashboards, connect APIs, store transactions and analyse investment data.
A custom system gives you control over how your portfolio is structured and displayed. The important distinction is between building the interface you want and maintaining the portfolio records it depends on.
The Dashboard Is One Layer
Displaying holdings, performance or portfolio value is only one part of a portfolio tracking system. Behind those figures, a long-term portfolio record may need to account for:
Purchases and sales across many years.
Brokerage and other transaction costs.
Different currencies and exchange rates.
Dividends and distributions.
Cost base adjustments.
Corporate actions.
Capital losses carried between financial years.
Historical corrections when source data changes.
Annual tax information from exchange-traded funds (ETFs), managed funds and trusts.
A purchase parcel is a group of units bought together. Its cost base, generally the purchase cost plus relevant fees and adjustments, can affect a Capital Gains Tax (CGT) calculation many years later.
Navexa stores transactions and portfolio history so later reports can use the records already in your portfolio. See Why Earlier Financial Years Matter For Tax Reporting.
Tax History Can Be Long-Term
Australian tax reporting is one area where historical records become particularly important. Navexa's CGT reports use recorded transactions, cost bases, carried-forward losses and tax settings. See Creating A Capital Gains Tax Report.
Report accuracy depends on complete and correct portfolio records. You still need to review your transactions, statement information and tax settings.
An unused capital loss from an earlier year may affect a later report. Check Navexa's loss balance against your lodged tax records and supporting documents. See Carry-Forward Capital Losses In Navexa.
The Attribution Managed Investment Trust (AMIT) framework can add another layer. AMIT Member Annual (AMMA) statements contain tax components and may include cost base adjustments. See About AMIT and AMMA Statements in Navexa.
You need to obtain the provider's final annual statement, enter or import it into Navexa, and review the saved values. The process is explained in How to Enter or Import an AMIT/AMMA Statement in Navexa.
Navexa applies defined calculation rules to the recorded data and settings. A self-built system can also produce repeatable calculations, but you take responsibility for validating its rules, maintaining its logic and retaining the history needed to reproduce reports.
Data Has To Come From Somewhere
A portfolio tracker needs source data such as market prices, distributions, transactions and exchange rates. Broker file formats and APIs can change, and incoming data can need correction or reconciliation.
Navexa maintains data feeds for supported assets and markets, together with supported imports and integrations. For trade imports, see Automated Trade Importing (Overview) and Import Holdings From a Spreadsheet.
With a self-built system, maintaining those connections and deciding how incoming data should be treated becomes part of the project.
Security Is Part Of It
If your tracker stores personal or financial information, you're also responsible for protecting it. That can involve:
Authentication and account access.
Database permissions and encryption.
API credentials and secrets.
Backups and recovery.
Monitoring and software updates.
Controlling which users or services can access your data.
Navexa maintains security controls as part of the service, including encryption in transit and at rest, access controls, monitoring and backups. See Is my data safe in Navexa? Security & privacy explained..
A custom application can implement strong security too. Designing, configuring and maintaining those controls becomes your responsibility.
Maintenance Doesn't End At Launch
A self-built tracker becomes software you own and maintain. Over time, that can mean:
Investigating discrepancies and fixing bugs.
Updating integrations and dependencies.
Maintaining your database and backups.
Testing calculation changes.
Keeping security controls current.
Adding functionality as your needs change.
For some people, that's part of the appeal. For others, the goal is to maintain an accurate portfolio record and use the information it produces.
A Navexa subscription includes maintenance of the underlying platform, supported integrations, reporting tools and infrastructure. Compare that cost with the time and ongoing work your own system would require.
You Can Still Use AI
Using Navexa doesn't mean giving up AI. Navexa can connect to supported assistants such as Claude and ChatGPT through MCP, or Model Context Protocol. See Connect Navexa To Claude Or ChatGPT.
This lets your AI assistant work with approved Navexa data and supported tools. You can ask questions, analyse holdings and run supported reports without first building the portfolio database and reporting system yourself.
Available tools and reports depend on your account, connection settings and AI assistant. Your assistant and plan also need to support the connection.
Navexa maintains the portfolio record and reporting foundation, while AI gives you another way to explore and work with that data.
When DIY May Suit You
A self-built portfolio tracker may suit you if you:
Enjoy building and maintaining software.
Want control over the underlying data model.
Have specialised requirements Navexa doesn't support.
Have a simple portfolio without extensive reporting needs.
Are comfortable maintaining your own data sources, calculations and security.
Navexa doesn't support every asset, broker or specialist workflow. Check What can I track with Navexa? (Supported assets, markets & exchanges) before deciding whether the platform fits your needs.
Some assets, including bonds, can be represented with manually supplied trades, income and valuations. See What is a Custom Investment in Navexa?. Custom Investments and MCP don't add native options tracking or specialist bond analytics.
For some investors, building and maintaining a tracker is worthwhile. For others, using a maintained portfolio platform and extending it with tools such as AI is a better fit. The choice comes down to how much of the system you want to own.
Remember, this is general information, not personal financial advice.