Prompt Engineering: How to Ask AI the Right Questions About Money

A prompt is just a question or instruction you give to an AI. But here's the thing: asking "What should I do with my money?" gets a generic answer. Asking "I earn $3,200/month, spend $1,800 on rent and childcare, have $400 emergency fund, and want to know if I can save for my kid's braces—what would you cut?" gets a real answer tailored to your life.

Prompt engineering sounds fancy, but it's really just the skill of asking better questions. Think of it like the difference between asking your doctor "Why am I tired?" versus "I sleep 7 hours, take vitamins, but feel exhausted by 3pm on days my kid has soccer practice—what could that be?" The second question gives the doctor actual information to work with.

The Three Rules of Better Prompts

Give specific numbers, not vague descriptions. Don't say "I don't have much saved." Say "I have $487 in my emergency fund and want it to be $2,000." Numbers help AI do math and see your actual situation.

Explain your constraints upfront. Tell the AI: "I can only find $50/month extra," or "I can't increase my work hours," or "I need solutions that work with my kid's school schedule." This stops the AI from suggesting things that won't work for you.

Ask for what you actually need, not what you think you should ask. If you want a specific format (a table, a step-by-step plan, a pep talk), say so. "Give me a week-by-week plan" is better than "help me save."

Real Example

Weak prompt: "How do I budget better?"

Strong prompt: "I'm a single parent earning $2,800/month. Fixed costs are rent ($1,200), childcare ($900), utilities ($150). I have $300 debt I want to pay off in 6 months, and $2,000 emergency fund goal. The remaining $250 gets spent on groceries, gas, and unexpected stuff. What would you prioritize: debt payoff, emergency fund, or finding ways to cut spending? Show me the math for each option."

Try this: Take a real financial question you have. Write it two ways—once vague, once detailed with numbers and your constraints. Ask both versions to Claude or ChatGPT and compare the answers. You'll immediately see why specificity matters.