MyCashRunway
How Long Will My Savings Last If I Quit My Job?
You've been thinking about it for months. Maybe years. The daydream where you walk into your boss's office, slide your resignation across the desk, and finally breathe. But then the fear kicks in: how long can I actually survive on what I've saved?
The short answer: divide your total liquid savings by your monthly expenses. That's your cash runway — the exact number of months you can sustain your current life without a paycheck. But the real answer is more nuanced, and getting it right is the difference between a liberating leap and a financial freefall.
Calculate your exact run-out date →
The Simple Formula Most People Get Wrong
The basic math looks easy:
Cash Runway = Total Savings ÷ Monthly Expenses
So if you have $30,000 saved and spend $4,000/month, you've got about 7.5 months. Simple, right?
Here's the problem: most people underestimate their monthly expenses by 20-30%. They forget about annual insurance premiums, car registration, holiday spending, and the dental work they've been putting off. They also forget that quitting a job means losing employer-subsidized health insurance — which can add $400-$800/month depending on your situation.
What to Actually Include in Your Monthly Expenses
When calculating your real burn rate, account for all of these:
The obvious stuff: rent or mortgage, utilities, groceries, transportation, phone, internet, subscriptions.
The stuff people forget: health insurance (COBRA or marketplace plan), income taxes on any investment withdrawals, annual expenses divided by 12 (car insurance, registration, property taxes), minimum debt payments, and an emergency buffer for the unexpected.
The stuff people refuse to cut: eating out, hobbies, that gym membership. Be honest with yourself here — if you're not actually going to cancel Netflix and eat rice and beans for six months, don't pretend you will in your calculations.
Why Monthly Averages Can Lie to You
Here's something most savings calculators won't tell you: your expenses aren't evenly distributed. January might cost you $3,500, but December could hit $6,000 between holiday gifts, travel, and annual renewals that all hit at once.
Monthly averages smooth out these spikes and make your runway look safer than it actually is. What you really need to watch for are danger days — those specific dates when multiple expenses stack up and your balance takes a sudden dive.
Maybe your rent, car payment, and annual insurance premium all hit in the same week. That week, your daily burn rate might be 3x your average. If you're already running low, those stacked expenses can push you to zero faster than you planned.
This is why looking at your finances on a daily basis — not just monthly — gives you a much more accurate picture of when you'll actually run out of money.
See your daily balance projection →
How Much Money Do You Actually Need to Quit?
Financial advisors typically recommend 3-6 months of living expenses as an emergency fund. But quitting your job isn't an emergency — it's a choice. The calculus is different.
Here's a more realistic framework:
If you have another job lined up (starting in 2-4 weeks): 2-3 months of expenses as a buffer. Things can fall through.
If you're job hunting with no offer yet: 6-9 months minimum. The average job search for professional roles takes about 5 months, and you want a cushion beyond that.
If you're taking a sabbatical or career break: Your full sabbatical length + 3 months. The extra 3 months covers the ramp-back-to-work period, because you probably won't start earning a paycheck on day one of your return.
If you're going freelance or starting a business: 12-18 months. Everything takes twice as long and costs twice as much as you think. Freelance income is lumpy — your first invoice might not get paid for 60-90 days after you do the work.
If you're pursuing early retirement: This is a fundamentally different calculation involving investment returns, withdrawal rates, and decades of time. The 4% rule (save 25x your annual expenses) is the starting point, but that's a topic for another day.
The Real Risks Nobody Talks About
1. Lifestyle Creep Works in Reverse Too
When you have free time and no job stress, you spend differently. Some costs go down (commuting, work lunches, dry cleaning). But others go up — you'll eat out more because you "deserve it," pick up new hobbies, or travel because what else are you doing with all this time?
2. Health Insurance Is the Silent Budget Killer
In the US, losing employer health insurance is often the single biggest new expense after quitting. COBRA (continuing your employer plan) is expensive because you now pay the full premium that your employer used to subsidize. Marketplace plans may be cheaper, but they require research and planning before your last day.
3. The Emotional Spending Trap
Unemployment — even voluntary unemployment — can trigger emotional spending. Boredom shopping, comfort purchases, "I'll start being frugal next month" thinking. Build an honest buffer for this reality.
4. The Extended Job Search
If you're planning to return to work, remember that the job market shifts. What was a 3-month search in a hot market could become an 8-month slog in a downturn. You can't predict the economy.
A Step-by-Step Plan Before You Quit
6 months before your target quit date:
- Calculate your actual monthly burn rate using 6 months of bank statement data
- Research health insurance costs (COBRA vs. marketplace)
- Start an aggressive savings push — every extra dollar goes to your runway fund
3 months before:
- Run your numbers through a cash runway calculator to get your exact run-out date
- Identify and cancel unnecessary subscriptions
- Pay down any high-interest debt if possible
- Negotiate any annual bills down (insurance, phone, etc.)
1 month before:
- Finalize your health insurance plan
- Set up automatic bill payments so nothing gets missed
- Create a bare-bones budget you can switch to if things get tight
After you quit:
- Check your projected run-out date weekly
- Re-evaluate every 30 days: is your spending matching your plan?
- Set a "get serious" trigger — a date or balance level where you shift into job-search mode
Know Your Number
The anxiety around quitting a job isn't really about the job. It's about the uncertainty of what comes after. But uncertainty shrinks when you have a clear number: the day your money runs out.
Once you know that date, everything changes. You can plan around it. You can decide if it gives you enough time. You can adjust your spending to push it further out. You go from "I think I can afford to quit" to "I know exactly how long I have."
Calculate your run-out date now → Your data stays on your device.
MyCashRunway helps you see exactly when your money runs out — down to the day. Built for people making big life transitions: quitting a job, taking a sabbatical, going freelance, or bootstrapping a new venture.