The AI revolution is well underway, with the potential to reshape our world. Although AI has already become a part of many of our daily lives, when it comes to something as important and nuanced as long-term financial planning, it falls short. While AI can provide general information, it currently lacks the level of strategic insight, personalized judgment, and fiduciary care that experienced human financial advisors offer. In this post, we’ll explore how AI tools work, their inherent limitations, and why working with a financial advisor remains important for making informed decisions about your financial future.
How AI Works, and Why Sometimes it Doesn’t
While forms of machine learning that power recommendation engines, fraud detection, and spam prevention have been around for over a decade, it’s only in the past few years that we’ve seen the rise of generative AI based on Large Language Models (LLMs).
LLMs, like ChatGPT, Claude, and Gemini, are trained on vast amounts of text data from books, websites, articles, and other publicly available sources. They work by predicting what word comes next in a sequence based on patterns learned during training. Unlike human advisors who learn through education, experience, and real-world problem solving, LLMs don’t necessarily “think” or “understand” in any human sense. In other words, they lack experience, intentions, or awareness, relying on statistics to generate articulate text.
That distinction matters when comparing AI tools to a financial advisor. While these tools can provide general information, financial planning often requires interpretation, context, and accountability factors that go far beyond pattern recognition.
The Limitations of LLMs
This distinction between generating language and genuinely understanding complex human contexts is central to why AI, as powerful as it can be, has serious limitations when applied to financial planning. Two of the major drawbacks to LLMs include:
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Hallucinations: LLMs will confidently present incorrect information, or even make things up, when they lack reliable input. This has become a major problem in law, where ChatGPT creates fake case citations when it can’t find real ones to support an argument.
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Bad or Outdated Data: LLMs are only as good as the data they’re trained on, which may include inaccurate information from dubious sources. Additionally, there’s a cutoff date for specific models, after which no new data is being ingested. For example, according to OpenAI, ChatGPT4o has a knowledge cutoff of October 1, 2023.
What Financial Advisors Bring to the Table
As we mentioned in the previous section, LLMs are built to generate plausible-sounding text. When it comes to something as important as your financial future, “plausible-sounding” simply doesn’t cut it. Here’s what a trained, experienced human advisor brings to the table:
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Trust & Relationship: Human advisors provide ongoing support, accountability, and reassurance that AI cannot. They understand the emotional weight of financial decisions and can guide clients through uncertainty, whereas LLMs simply generate text without awareness or, more importantly, responsibility.
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Personalized Judgment: Human advisors lean on years of lived experience and can interpret nuanced circumstances, goals, and values to provide tailored strategies. LLMs, in contrast, rely solely on patterns in their training data and can misinterpret or oversimplify personal contexts.
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Complex Scenario Planning: Human advisors can synthesize multiple factors—tax laws, estate considerations, investment risk, and family needs—into coherent strategies. AI is good at providing general overviews, but struggles with the precision and logic required for intertwined, high-stakes decisions.
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Accountability & Fiduciary Responsibility: Financial advisors are ethically obligated to act in clients’ best interests. LLMs do not possess accountability; they can produce unsupported claims, present outdated information, or make arithmetic errors with no professional responsibility for the consequences.
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Regulatory Knowledge: Advisors stay up to date on tax laws, compliance requirements, and evolving financial regulations. LLMs are limited to the data they were trained on and cannot automatically access current rules or verify real-time changes, making them unreliable for advice that depends on accuracy and timeliness.
Where AI Can Be Useful in Financial Planning
That said, AI does have valuable applications in financial planning when used appropriately and with proper context.
AI is a great place to start if you’re doing basic research. If you want to understand fundamental financial terms, concepts, or general strategies, generative AI can provide clear, accessible explanations. Because much of this information is well-documented online, AI tends to perform reasonably well at summarizing it.
If you want to learn more about a specific company or industry you’re considering investing in, AI can provide an overview that gives you a starting point for deeper research. It can help you frame questions to ask, identify key performance metrics, and point you toward areas for further investigation.
The important thing to remember is that AI should be just one data point—a place to start before you dive into more in-depth research. For important decisions that affect your financial future, the final step should always be talking to a qualified professional.
The Role of AI in Financial Planning — and Where Advisors Fit In
AI is changing the world faster and more comprehensively than anyone could have imagined a decade ago. But as powerful as generative AI tools can be, they cannot replace the nuanced judgment, fiduciary responsibility, regulatory knowledge, and personalized relationship that a human financial advisor brings to long-term wealth planning.
With limitations like hallucinations, reliance on bad or outdated data, and weaknesses in reasoning, AI alone may lack the necessary reliability to serve as your primary financial advisor. Use AI to inform your understanding, but rely on experienced professionals to guide your decisions.
At Cary Street Partners, our advisors bring decades of experience in comprehensive financial planning, tailored strategies, and a commitment to acting in your best interest.
Contact us today to discuss strategies tailored to your goals. Together, we aim to help you make your financial future truly golden.
Paige W. Garrigan
Chief Marketing & Transitions Officer, Managing Director
The Wealth Wisdom Series is curated by Paige W. Garrigan, drawing from the experience and input from Cary Street Partners’ Financial Advisors. Collaborating internally with the team, she gathers pertinent and timely topics for readers. With over 30 years of experience in the financial services industry, she has acquired a wealth of knowledge across various facets of the industry, ensuring comprehensive insights for readers.
Cary Street Partners is the trade name used by Cary Street Partners LLC, Member FINRA/SIPC; Cary Street Partners Investment Advisory LLC and Cary Street Partners Asset Management LLC, registered investment advisers. Registration does not imply a certain level of skill or training.
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