Can You Put a Bank Statement in ChatGPT?

Yes, you can paste a bank statement into ChatGPT. But think before you do. A bank statement is far more revealing than a simple RIB. It exposes your name, your address and your IBAN. It also reveals your balance and your whole transaction history. It's the complete portrait of your financial life. Your spending habits say a lot about your privacy. Once pasted, this data enters the AI provider's processing. The simple rule: anonymize the statement before sending it.

A bank statement is far more than a RIB

A RIB mainly exposes your IBAN and your name. A bank statement goes much further. It lists, line after line, what you spend and where. It shows your balance and your disposable income. It reveals your subscriptions, your habits and sometimes your health. It's an intimate document, not a mere set of bank details. Here's what a statement reveals beyond a RIB:

• Your balance and your financial situation right now.
• The full transaction history, line by line.
• Your spending habits: merchants, places, frequency.
• Clues about your private life: health, hobbies, donations.

« Highly personal data »

The CNIL places bank details in a high-risk category. It calls them « highly personal data ». This notion comes from the guidelines on impact assessments. It targets processing likely to create high risks. In short: this data calls for reinforced vigilance. A bank statement ticks every box.

The GDPR minimization principle

The GDPR sets a simple principle: minimization. Under its Article 5, processed data must be « adequate, relevant and limited to what is necessary ». Yet to build a budget, the AI doesn't need your name. It doesn't need your IBAN or your address. Pasting a whole statement therefore exceeds the strict necessary. Good practice is to transmit only what's useful.

« I just want to categorize my spending »

That's a legitimate need, and the AI does it very well. But it doesn't need your real data to do so. It categorizes just as well on anonymized labels. An amount stays an amount, even without your name. A subscription stays a subscription, even without your IBAN. You get the same budget, with far less exposure. Let's be factually clear on one point. Pasting a statement can't, on its own, empty your account. The real risk is exposing sensitive data, not a direct debit.

The fix: anonymize before the prompt

You can use AI while greatly reducing your data's exposure. Just neutralize the statement before sending it. The mapping between the token and the real value stays with you. Here's how to proceed:

1. 1Spot the sensitive data in the statement: name, address, IBAN.
2. 2Replace it with tokens before writing your prompt.
3. 3For a CSV export, use ONYRI's Tables Section: it anonymizes column by column.
4. 4Send the neutralized text: the AI categorizes on pseudonymized labels.

This reflex changes everything. The AI builds your budget on neutralized data. You keep control of the real values. And you respect the spirit of minimization, without giving up the tool.

That's what ONYRI Sanitize does. The engine detects name, address and IBAN, then replaces them with reversible tokens before sending. Detection and the token↔value mapping stay in your browser. Only anonymized text reaches the AI. This pseudonymization reduces exposure: it doesn't remove it, nor make a use « 100% safe » on its own. But it keeps you in control of what matters here — the real detail of your financial life.