Quick test: say out loud how long your money would last if your paycheck stopped tomorrow. Got a number? Hold onto it. We’ll come back and see how wrong it was.
A Redditor on r/ChatGPTPromptGenius did this with a friend who had just been laid off. One kid, a wife working part-time, a mortgage in Ohio. His answer was “we’re fine for a year, between savings, severance and unemployment.” It sounded solid, and that’s the trap. Then they made ChatGPT run it month by month.
🧮 Step 1: Do the lazy math first
Write down your gut answer. Then do the classic version: savings divided by monthly expenses. That’s what most of us do, and it’s the number you’re about to beat up.
The problem is that “expenses” usually means what you spent while you had a job. That includes health insurance through work, and it ignores the yearly stuff like gifts, travel and clothes.
🛠️ Step 2: Make the AI do the real version
Open ChatGPT and turn web search on, so it pulls your state’s current unemployment numbers. Then paste in a prompt shaped like this and fill in every bracket:
I want to know how long my money lasts if my income drops: as I live now, if I cut back moderately, and if I cut everything that isn’t fixed. Use current figures for my state’s unemployment benefits. Show everything in today’s dollars.
Filing status: [single / married filing jointly]
Location: [city/state]
Income: [my salary before taxes], [partner’s salary or none]
Health insurance today: [through work, $X/month] or [I pay $X/month] or [none]
Fixed expenses per month: [rent or mortgage, utilities, insurance, childcare, car costs, transit]
Regular spending per month: [groceries, eating out, subscriptions, sports, personal care, pets]
Irregular spending per year: [clothing, electronics, travel, gifts, medical, entertainment]
Assets: [every account and balance]
Debts: [balance, interest rate, monthly payment for each]
Scenario: [I lose my job for 12 months with X weeks of severance and state unemployment]After a job loss, add marketplace health insurance for my new income. Spread the yearly figures across the months. When cash runs out, take from accounts in this order [brokerage, then pre-tax], with the taxes and penalties that apply. Assume I am under 59½ and everything is vested. For each of the three versions, tell me the month cash runs out, the month I have to touch retirement accounts, and what exactly you dropped to get there.
The prompt works because it asks for three versions: live as you do now, moderate cuts, and only fixed costs. It also counts the things your napkin math skips:
- 🏛️ Your state’s unemployment benefit and how many weeks it lasts
- 💵 Severance
- 🩺 Marketplace health insurance at your new, lower income
- 🎁 Yearly costs spread across the months
- 🏦 Which account gets drained next, including tax and the 10% penalty once it reaches the 401k
Step 3: Read what the results mean
Here is what the friend’s run showed. He had 8 weeks of severance, $15k cash, $10k in a brokerage account, $96k in the 401k, and his wife’s $30k still coming in. Numbers are rounded.
- Live as now: about $7,590 a month. Cash runs out in month 8, and the 401k gets touched in month 10. About $19.4k comes out of it by month 12.
- Moderate cuts: about $6,460 a month. Cash runs out in month 10, and the 401k gets touched in month 12. About $1.3k comes out by month 12.
- Fixed costs only: about $6,002 a month. Cash runs out in month 11, and the 401k stays untouched through month 12.
The surprise was that cutting everything down to the bone bought only one extra month over moderate cuts. The mortgage, daycare and the car make up most of the bill, and none of them move. The real cliff showed up in month 9, when unemployment ran out. After seeing that, he stopped saying “a year” and started applying a lot harder.
So compare your gut number from the start with what the model gives you. If it’s lower, good, you found out while there’s still time to act.
Extra tips
- Be stingy with the guesses. The more real numbers you paste in, the less the model fills in with fantasy.
- Run a second scenario, like “my pay drops 40% permanently” or “we both lose our jobs for 6 months.” Your household may be more fragile in one than the other.
- Look at the “what got cut” list, not just the month. It shows which expenses are actually movable. In the thread, one commenter wondered what makes up a $6k monthly floor and suggested selling a financed car. That’s a fair question to run through the model too.
- Treat the 401k order as an input, not a fact. Some people would never touch retirement money, and the prompt lets you test that by changing the withdrawal order.
- Remember it’s an estimate, not financial advice. Check the unemployment figures against your state’s own site.
One honest note: the author works on finerd.ai, a money tracker that connects to ChatGPT, Claude or Gemini so the assistant can use your real transactions instead of typed-in numbers. The prompt above works fine without it, and it’s free to copy.
☠ Your turn
Run the check this week, while nothing is on fire. Was your number better or worse than you assumed? Tell the crew in the comments, and if you tweaked the prompt to get a sharper result, paste your version. Fair winds, and may your month 9 never come early!
Frequently Asked Questions
Q: Should you keep daycare while you’re out of work?
Lots of commenters say this is the first line to cut. Daycare is often one of the biggest costs on a budget like this, and when one parent is home, it’s hard to justify. Ask your provider about a pause or a reduced schedule before you pull your kid out, since some places offer one.
Q: Should you touch your 401k when the money runs low?
Commenters split on this. Some say never touch it, because a withdrawal is short-term relief for long-term pain, and the 10 percent penalty plus taxes can take a big bite. Others treat it as the last reserve once savings and benefits are gone. One commenter suggested a hardship claim could avoid the penalty, but the exceptions are narrow, so check with a tax pro before counting on it.
Q: What government help could cover the gap?
Several commenters pointed to Medicaid, SNAP, and cash assistance as bridges while someone looks for work. Eligibility depends on your state and usually looks at your current household income, not the salary you lost. Start with your state’s benefits portal or local social services office, since that’s where the up-to-date rules live.
Q: Can you sell a car to stretch the savings?
One commenter raised this, and it’s worth running the numbers. If a car has no loan, the sale price is straight cash. If there’s a loan, you only walk away with money when the sale price is higher than the payoff, so compare the two before you list it.
Q: How much should you trust the numbers?
Commenters asked whether the output was checked against a spreadsheet, and that’s a good instinct. Confirm current benefit amounts and waiting periods on your state’s official site, since AI tools can miss recent changes. One commenter who did the math found their runway was shorter than they had assumed, which is exactly why the check is worth doing.
My friend got laid off and said “we’re fine for a year.” We ran it through ChatGPT: cash gone in month 8, 401k in month 10
by u/realFinerd in ChatGPTPromptGenius