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Category · 22 cases
AI in personal finance
Cases of people who used AI to organize their own money: categorizing expenses, building a budget, comparing loans, understanding contracts, preparing their tax return and planning goals. AI helps with the math and explains terms, but it can get numbers wrong, so check everything before you decide. Avoid pasting full bank details. Each case shows what the person did, the reported result and a prompt for you to test with your own numbers.
22 cases, 3 of them from Brazil, from newest to oldest. The tools cited most here are Claude Code, Meta Muse, and Claude Cowork. People who show up most in these accounts: consumer, investor, and developer.
The cases
22 cases
01Frenchman finally cancels seven subscriptions he had been putting off
The agent didn't just make a list: it canceled and closed the accounts for seven services.
02Forgotten money at old addresses in two countries
A user gave the agent a list of places they had lived; it found an extra US$ 500 plus funds in the US.
03Agent cleans up the finances and finds errors in the tax return
The bot downloaded hundreds of statements, compared the tax return with the IRS records and found duplicate charges.
04Income statement for each rental property
The agent logs into the management software and builds the profit and loss for each property.
05Analyst asks an agent to find forgotten money in their name
Nick Grous, from ARK Invest, received a list of unclaimed funds and got help with the paperwork.
06Canceling a subscription and requesting a refund in chat
The agent canceled the subscription, opened a support chat and got the refund.
07A portfolio plan built from brokerage exports
Matt Stockton gave Claude the CSVs and a prompt with goals, then said: "ask me all the questions".
08Freelancer in Germany files overdue VAT returns
Claude organized invoices and receipts by quarter and filled in the forms on the German tax portal.
09Filing Indian income tax on the portal with an agent
A user handed the income statements to Claude, which checked the data on the portal and submitted the return.
10A professor gathers tax documents and deductions with skills
Chris Blattman, a professor at the University of Chicago, built routines that hunt for tax documents in Gmail and assemble spreadsheets.
11A bot that negotiates a discount on your internet bill
DoNotPay built a bot that chatted with Comcast support and got $10 a month off, but it made up arguments.
12A full investment memo on a company
The author had Claude download Adyen's reports and build a business overview, an Excel model and a thesis.
13Finding a forgotten charge and getting a refund
The agent reviewed 12 months of receipts, found an idle database and kept pushing until the company issued a refund.
14A former tax preparer tests Claude on his own return
Ex-PwC Geoffrey Doempke let Claude classify documents and extract numbers into files he could check.
15Automatic expense tracking on a Raspberry Pi
Fahad Hasin, who says he knows little about coding, had Claude build an expense tracker that runs every night.
16Filling out the accountant's questionnaire with AI
The author had Claude read the fields of the accountant's form and fill it in from their documents, flagging what was missing.
17Hunting recurring subscriptions in your statements
The agent read statements in CSV, spreadsheet and PDF formats and listed charges that repeat, ignoring groceries and fees.
18Automatic renewals spreadsheet built from Gmail
A journalist had the agent search for "renewal" and "subscription" and build a list of services, dates and amounts.
19Canceling three streaming services with an agent
A journalist typed in her own passwords and the agent clicked through the entire cancellation flow for Peacock, Disney and Netflix.
20Building a balance sheet and debt payoff plan by chatting with an AI
A dev created a financial analyst with Gemini that reads a card statement or bank statement and proposes a payoff plan.
21Getting your finances organized from scratch by chatting with ChatGPT
The author explains how they listed expenses, categorized them and built a plan by chatting with ChatGPT, with no complicated spreadsheet.
22Preparing your income tax return with an AI agent
A developer used Claude Code with Open Finance data to organize tax statements and build the return, leaving only the review for himself.