Plan your path to financial independence with the 4% rule. Enter expenses and savings rate to calculate your FIRE number, years to FI, and retirement date. Essential for the FI community.
The FIRE Calculator helps you plan your path to financial independence and early retirement. Use our early retirement net worth nest egg calculator to determine your FIRE number based on the 4% safe withdrawal rule. The corporate 401k roth ira growth projection tool models employer-matched contributions, catch-up provisions, and Roth conversion ladders for high-income earners. For wealth preservation, the high net worth asset withdrawal rate calculator simulates multi-tiered withdrawal strategies across taxable, tax-deferred, and tax-exempt accounts factoring sequence-of-return risk and inflation margins.
At age 30 with $100K savings, $2K/month contributions, and $50K expenses, you could reach FIRE in ~15 years.
Your FIRE number is the amount you need invested before you can walk away from traditional work — but here's the thing most people miss: it's not just about the number, it's about your spending. The lower your annual expenses, the smaller your FIRE number, and the faster you get there. That's the beautiful symmetry of the FIRE equation — every dollar you cut from your yearly spending reduces your target by $25 (at a 4% withdrawal rate). A $40,000 lifestyle needs $1 million. A $30,000 lifestyle needs just $750,000. That's $250,000 less you need to save, just by finding ways to spend $10,000 less per year. When you look at your results, the most telling number is the Years to FIRE. If it's under 10, you're in rarefied air — that usually requires an extremely high savings rate (50%+) or already having significant savings. If it's 10-20 years, that's the sweet spot for dedicated FIRE followers. If it's 20-30 years, you're still on a great path — that's basically a traditional retirement timeline compressed by a decade. The real magic of the FIRE calculator is showing you how changes in your savings rate dramatically compress the timeline. Going from saving 15% of your income to 30% can literally cut your working years in half. That's not theory — that's the math of compound growth combined with high savings rates working exactly as it should.
The FIRE (Financial Independence, Retire Early) movement isn't about deprivation — it's about intentionality. The idea is simple: save aggressively (usually 50-70% of your income) for a relatively short period (10-15 years), build up a portfolio large enough to support your lifestyle forever, and then spend the rest of your life doing whatever you want, on your own terms. The math behind FIRE is surprisingly straightforward. The foundation is the 4% rule, which says you can withdraw 4% of your portfolio annually (adjusted for inflation) with a very high probability of never running out of money. Your target — your 'FIRE number' — is your annual spending divided by 0.04. If you need $40,000 a year to live, your number is $1,000,000. If you can live on $25,000, your number is just $625,000. What makes FIRE so compelling is that every part of the equation is within your control. You control your savings rate by deciding how much to spend versus save. You control your timeline by adjusting how aggressively you save. You control your FIRE number by choosing what kind of lifestyle will make you happy. Unlike traditional retirement planning where you're aiming for an abstract 'enough,' FIRE gives you a concrete target and a clear relationship between your actions today and your freedom tomorrow. This calculator combines all these factors. Enter your current savings, monthly contribution, annual expenses, expected returns, and target withdrawal rate. It computes your FIRE number (how much you need), your Lean and Fat FIRE ranges, and most importantly — the number of years until you reach financial independence. Play with the inputs. See what happens when you cut expenses by 10%. See what happens when you boost your savings by $500 a month. The goal isn't just a number — it's understanding the lever that works best for you.
Use the FIRE calculator whenever you're questioning whether the standard 9-to-5 until 65 is the only path. The most common moments: when you first discover the FIRE movement and want to know if it's realistic for you; when you're optimizing your budget and want to see how much cutting expenses accelerates your timeline; after a raise or promotion (the best time to increase your savings rate before lifestyle creep sets in); when you're considering a big life change like moving to a cheaper city, changing careers, or starting a business; when you hit savings milestones (first $100K, first $250K) and want to update your projection; when you're trying to decide between Lean FIRE, Coast FIRE, or Barista FIRE; when the market drops and you want reassurance that your plan still works; or any time you need motivation to keep saving — seeing your Years to FIRE shrink by even a few months is incredibly motivating.