How good is ChatGPT at tax?

With the rise of AI-driven tools like ChatGPT, curiosity naturally arises about their ability to handle complex real-world scenarios. One area where clarity and accuracy are crucial is taxation. To test the capabilities, we posed a specific question regarding the Australian tax system and capital gains tax (CGT) on investment properties. The results were a mix of strengths in communication and significant limitations when it came to depth and accuracy in addressing technical nuances.

While AI is a remarkable innovation, this exploration highlights both its potential as an informative tool and the reasons why expert human advice remains indispensable for specific and complex matters like taxation.

ChatGPT’s Strengths: Communication Over Complexity

One of ChatGPT’s most notable strengths is its ability to communicate complex topics in a clear, approachable manner. Its tone and structure make it an excellent starting point for those unfamiliar with taxation concepts. For example, when asked about capital gains tax, the AI outlined the calculation in a simplified and easy-to-understand manner, giving users a foundation for further exploration.

However, simplicity can come at a cost. While the initial explanations may seem accurate, they lack the depth and detail required to navigate the intricate rules of the Australian tax system. This is particularly problematic when the topic involves detailed regulations, exemptions, and adjustments that vary based on individual circumstances.

In essence, ChatGPT excels at providing an overview but struggles to handle the granular complexities that make tax law so challenging to interpret.

Examining ChatGPT’s Response to Capital Gains Tax

Understanding Cost Base and Adjustments

When calculating CGT, the cost base of an asset is fundamental. ChatGPT provided a basic example: a property purchased for $500,000 with $50,000 in associated costs, resulting in a total cost base of $550,000. However, this oversimplification overlooks essential details:

1. Repairs During Rental Periods: ChatGPT included repair costs in the cost base without noting that these are generally deductible when incurred, meaning they cannot also be added to the cost base. For landlords, this distinction is critical, as it prevents double-dipping on tax benefits.
2. Capital Works Deductions: Investment properties often qualify for capital works deductions, which reduce the property’s cost base. These deductions can accumulate significantly over time, especially for long-held properties, affecting the overall capital gain. ChatGPT did not address these adjustments, leaving a substantial gap in its calculation.

Misinterpretation of Tax Rates

ChatGPT incorrectly stated that CGT is taxed at a flat rate of 45%. This is a significant error, as capital gains are added to an individual’s taxable income and taxed at their marginal tax rate.

For example, an individual earning $100,000 annually who realizes a $50,000 capital gain would have their taxable income increase to $150,000. This amount would then be taxed progressively based on Australia’s tax brackets. Additionally, ChatGPT failed to consider the 2% Medicare levy, which applies to most Australian residents.

Missed Opportunities: Discounts and Indexation

While ChatGPT mentioned that some exemptions and reductions might apply, it failed to explore the two most common concessions available to Australian residents:

1. General CGT Discount: Individuals who hold an asset for more than 12 months are typically eligible for a 50% discount on the capital gain. This is one of the most significant concessions for long-term investors.
2. Indexation Method: For assets acquired before 21 September 1999, indexation may apply, allowing the cost base to be adjusted for inflation. Comparing the indexation and discount methods is essential to determine the most favorable outcome.

The Accountant’s Perspective: Context Is Key

Taxation is rarely straightforward, and context plays a significant role in determining the correct approach. While ChatGPT provided a general framework, it omitted key nuances that could materially impact the final tax liability.

1. Exemptions and Concessions:
   ChatGPT briefly touched on exemptions like the main residence exemption and small business CGT concessions but failed to explain why these are typically irrelevant for investment properties. For instance:
   • Main Residence Exemption: This requires the property to have been used as the taxpayer’s primary residence, which is unlikely if the property was solely rented to tenants.
   • Small Business CGT Concessions: These apply only to assets meeting the active asset test, which rental properties generally fail unless used in a qualifying business.
2. Complexity of Adjustments:
   Adjusting the cost base for factors like capital works deductions, repair deductions, and acquisition costs is a nuanced process. Overlooking these details can lead to significant miscalculations.
3. Broader Tax Implications:
   Taxable income, other deductions, and additional factors like the Medicare levy can all influence CGT liability. ChatGPT’s lack of integration with an individual’s complete financial picture highlights its limitations.

Should You Rely on ChatGPT for Tax Advice?

ChatGPT’s final piece of advice—consult a tax professional—is perhaps its most accurate response. While it can provide general insights, the intricacies of taxation, particularly in areas like CGT, require expert analysis.

For Australian taxpayers, ChatGPT can be a helpful starting point for understanding concepts and exploring basic scenarios. However, reliance on its outputs for decision-making is risky, especially when financial stakes are high. Human expertise remains essential for navigating complex tax rules, ensuring compliance, and optimizing financial outcomes.

As AI continues to evolve, ChatGPT may become more adept at handling specific scenarios. For now, it serves best as an informative companion rather than a definitive authority on taxation matters.