As of 13 August 2026, AI can only partly forecast your bank balance.

What to actually do

1. Use a tool built for this

   The route this page recommends

2. Do it yourself

   Second choice

   A chat interface, chat-fluent skill, and roughly 30 minutes until you can act on the result.

   How to actually do it

   1. Open your banking app and record the current balance and date, then download recent statements or copy the transaction list without sharing passwords, card numbers or security codes.
   2. Gather payslips or other records for expected income, and list each regular bill, direct debit, standing order and planned one-off payment with its expected date and amount.
   3. Paste the starting balance, transaction data, expected income, planned spending and forecast period into the prompt, asking the chatbot to request missing dates or amounts before calculating.
   4. Check the chatbot's starting balance and transaction totals against your banking app and correct any duplicated, missing or misclassified entries.
   5. Ask the chatbot to produce the dated running-balance table, lowest projected balance and a separate cautious scenario using only figures you supplied.
   6. Open your banking app and compare the forecast with pending payments, direct-debit dates and any recently changed income before deciding whether you can afford a payment.
   7. Update the forecast when a payment or income arrives, and do not use it as confirmation that a payment will clear if the live bank balance disagrees.

   Prompt

   Forecast my bank balance from the information below. Use pounds and show the result by date in a table.
   
   Starting balance and date:
   [enter current balance and date]
   
   Bank transactions or cleaned statement data:
   [paste transactions with date, description and amount]
   
   Expected income:
   [list each payment, expected date and amount]
   
   Regular bills and direct debits:
   [list each payment, expected date and amount]
   
   Planned one-off spending:
   [list each payment, expected date and amount]
   
   Forecast period:
   [from date] to [to date]
   
   Instructions:
   1. Do not invent transactions, dates or amounts. Ask me for missing information before calculating.
   2. Treat income and spending as separate positive and negative amounts, and state which convention you used.
   3. Reconcile the starting balance against the supplied transactions and identify any mismatch.
   4. Calculate the running balance after every listed transaction and show the lowest projected balance and its date.
   5. Mark every assumption and separate confirmed payments from estimates.
   6. Provide a cautious scenario using lower expected income or higher planned spending only where I give those figures. Do not invent a buffer or probability.
   7. Flag any point where the projected balance may be insufficient for a listed payment.
   8. End with a short list of facts I must check in my banking app before relying on this forecast.
   This is not professional advice. Do not recommend borrowing, investments or financial products.

   Open it prefilled in ChatGPT or Claude, or copy it into Gemini, which takes no prefill link.

3. Hand it to a person

   The distant third

   A person who owns the outcome does this end to end, worth it when the failure is dear.