In January I opened my banking app on a Sunday night, looked at the total, and felt that specific, sinking feeling you only get when the month still has nine days left in it. I was not broke. I was disorganised. Money was leaving in small, forgettable amounts — a streaming service I had not opened since October, a food-delivery habit that had quietly become a twice-a-week habit, a gym membership I defended every month and used twice. I did not need a finance guru. I needed someone to sit with the numbers and ask blunt questions. So I gave the job to an AI chatbot, with one rule: no vague advice, only numbers, dates and decisions I could check.
That month became an experiment. I fed the chatbot anonymised figures — no account numbers, no names, just categories and amounts — and asked it to do the boring work: sort, total, compare, and challenge me. When we tried the subscription audit, something genuinely useful happened: it listed 11 recurring payments totalling €118.40 a month, and three of them I had completely forgotten, including a €14.99 app subscription I had signed up for during a free trial in November. Cancelling those three alone freed €38.97 a month. That is €467.64 a year, found in about twenty minutes, and it is the reason I now trust AI for the arithmetic of money while still making every decision myself.
This article gives you the 30 prompts that survived that month. They are written for European life: euro amounts, SEPA direct debits, annual subscriptions that renew in January, energy bills that jump in winter, and the reality that a “budget” here often has to work across two currencies or two countries. Copy them as they are, then replace the bracketed bits with your own numbers. One warning that matters: an AI chatbot is not a regulated financial adviser, and nothing here is personal financial advice. Use it to organise, compare and plan — and talk to a qualified adviser before big investment or debt decisions.
The budget prompts: start with the truth, not a target
Most budgets fail because they start with what you wish you spent. Start with what you actually spent.
1. “Here are my last 3 months of spending by category: [paste anonymised totals]. Show me my real monthly average per category, flag the three categories that grew fastest, and tell me the total in euros.”
2. “Build me a 50/30/20 budget for a net monthly income of €[amount] in [city]. Adjust the housing share for local rents and show the exact euro amount for each bucket.”
3. “I spend €[amount] on groceries for [number] people. Give me a weekly grocery budget, a list of the five most likely overspend triggers, and one swap for each.”
4. “Turn this messy list of expenses [paste list] into a clean monthly budget table, with fixed costs, variable costs and one-off costs separated.”
5. “I want to save €[amount] in 6 months without cutting [one thing you refuse to give up]. Show me three different monthly plans that reach the target and what each one costs me in lifestyle terms.”
6. “Review my budget and find €100 of savings that do not touch rent, food or transport. Rank them from easiest to hardest and give the exact step for each.”
What I learned from this group: prompt 5 is the one that changed my behaviour, because it forced a trade-off instead of a lecture. When the chatbot showed me that keeping my Saturday coffee ritual meant cutting delivery food instead, the plan finally felt like mine rather than imposed.
The saving prompts: small, automatic, and boring on purpose
Saving works when it happens before you can spend the money, not after.
7. “Design a payday routine for someone paid on the 25th: which transfers to make on the 25th, 26th and 1st, and how much to each account, for a net pay of €[amount].”
8. “I want an emergency fund of €[amount]. If I save €[amount] a month, how many months will it take, and what is a realistic starter target for the first 90 days?”
9. “Compare these three savings options for €5,000 over 12 months in [country]: a savings account at [rate]%, a notice account at [rate]%, and leaving it in a current account. Show the interest earned in each case and the catch in each case.”
10. “Give me a 30-day no-spend challenge that still allows groceries, transport and one social outing a week. Include a daily check-in question.”
11. “I have €[amount] left at the end of the month. Split it between emergency savings, debt and fun money, and explain why you chose those proportions.”
12. “Help me set up a sinking fund for annual costs: car insurance €[amount], holidays €[amount], Christmas €[amount]. How much do I save monthly, and on which date?”
The debt prompts: pay the expensive money first, and say so plainly
Debt advice online is full of gentle euphemism. The maths is not gentle: expensive debt first.
13. “Here are my debts: [list each with balance, interest rate and minimum payment]. Rank them by total interest cost, then build a payoff plan using the avalanche method with a monthly payment of €[amount].”
14. “Now rebuild the same plan using the snowball method, smallest balance first. Show me how much extra interest the snowball costs versus the avalanche, in euros, so I can choose with open eyes.”
15. “Write a polite but firm email to my bank asking for a lower interest rate on my [card/loan], citing my payment history and the competing offer of [rate]%.”
16. “I can pay an extra €[amount] a month towards debt. Show me the month-by-month effect over 12 months versus paying only the minimum, including total interest saved.”
17. “Explain the difference between a 0% balance-transfer card and a personal loan for a €[amount] debt in plain language, including fees, the revert rate, and the three mistakes that make a transfer backfire.”
18. “Create a debt-free date plan: if I pay €[amount] monthly and stop adding new card spending from [date], on what date am I debt-free, and what happens if I miss two payments?”
My stance, stated plainly: I think the avalanche method is mathematically right and the snowball method is humanly right, and for most people the humanly right one wins. A plan you abandon in March saves you nothing, however elegant its spreadsheet looks in January. Pick the plan you will still be following in June. That is a contestable opinion, and I know debt advisers who would argue the opposite — but after watching my own plan survive only because of early small wins, I am keeping it.
The bills and subscriptions prompts: the audit that pays for itself
19. “Here is my list of subscriptions with monthly costs [paste list]. Total them, flag anything I have not used in 30 days, and draft the cancellation message for each one.”
20. “Compare my energy tariff [current rate, usage] with two alternatives in [country]. Show the annual saving in euros and the exit fee I must check first.”
21. “Review my phone contract: I pay €[amount] for [data/minutes]. Find me a cheaper plan with the same data allowance in [country] and list what I lose, if anything.”
22. “Build a yearly calendar of my renewal dates — insurance, streaming, software, gym — with a reminder two weeks before each one, so nothing renews by surprise again.”
23. “I pay for [service] and [similar service]. Compare them feature by feature and tell me honestly whether I need both, with a one-line verdict.”
24. “Negotiate my broadband bill: write a script for the retention call, including the competitor price I can quote, the discount I should ask for, and the line to use if they say no.”
The investing-basics prompts: learn the vocabulary before risking a euro
25. “Explain ETFs, index funds and individual stocks to a complete beginner in [country], using a €100-a-month example, and list the three risks nobody mentions in adverts.”
26. “What is the difference between an accumulating and a distributing ETF, and which one usually suits someone who does not need the income yet? Use a worked example.”
27. “Before I invest, give me a 10-question checklist covering emergency fund, debt, time horizon, fees and tax in [country], and tell me which answers mean ‘not yet’.”
28. “Compare the total yearly cost of two investment platforms for a €200-a-month investor, including platform fees, fund fees and currency-conversion fees.”
29. “I am tempted by [investment trend you saw online]. Give me the bull case, the bear case, and the three questions I should answer before putting any money in.”
30. “Write my one-page money plan for the next 12 months: income, fixed costs, savings target, debt target and one fun-money rule, all on one page I can stick on the fridge.”
Three prompts that flopped, honestly
Not everything worked. “Make me rich by December” produced a fantasy plan involving a side business, crypto and a lottery-level assumption about overtime. “Sort my finances” with no numbers produced generic advice I could have found anywhere. And asking the chatbot to predict my energy bill from one month of data gave a figure that was wrong by nearly 40%, because winter usage looks nothing like September usage. The lesson is consistent: vague in, vague out. Numbers in, numbers out.
The honest bit.
No app will save you.
No prompt will save you.
A 20-minute money date, once a week, with real numbers in front of you, will do more than any tool I have tested. Put it in the calendar. Keep the coffee. Cancel the subscription you forgot. That is the whole system, and it is enough to start.
If you use only five prompts from this list, use 1, 5, 11, 13 and 22: know what you spent, protect one joy, split the leftover deliberately, attack the expensive debt, and never let a renewal surprise you again. Then come back next month and run the audit again — the second time takes ten minutes, because the hard part was the first honest look.
Related reading: build a personal budget with AI and negotiate a better salary.