Tools in This Collection
FIRE Number Calculator
Calculate your FIRE number and years to financial independence using the 4% rule
Coast FIRE Calculator
Find the balance you need today to coast to retirement without additional contributions
Millionaire Calculator
Calculate when you'll reach $1M based on current savings, contributions, and return rate
Savings Goal Calculator
Calculate monthly contributions needed and timeline to reach any savings target
Emergency Fund Calculator
Calculate your ideal emergency fund size based on 3-6 months of monthly expenses
Compound Interest Calculator
See how lump sum deposits and regular contributions grow with compound interest over time
Rule of 72 Calculator
Calculate how many years to double your investment at any given return rate
Inflation Calculator
See how inflation erodes purchasing power and the future real value of today's dollars
Guides & Articles
FIRE and Savings Goals Workflow
Financial independence isn't a single number — it's a progression. The journey starts with an emergency fund (defensive), then grows toward a FIRE number (offensive), with intermediate savings goals along the way. This cluster of tools supports every stage of that progression.
Step 1: Build an Emergency Fund First
Before investing aggressively, secure a cash buffer. The general guideline is 3-6 months of essential expenses in a high-yield savings account or money market. The Emergency Fund Calculator personalizes this range based on your income stability, dependents, and job-replacement timeline. An underfunded emergency fund is the most common reason people derail investment plans — an unexpected expense forces selling at the worst time.
Step 2: Calculate Your FIRE Number
Your FIRE number is 25x your annual spending (the mathematical inverse of the 4% safe withdrawal rate). A household spending $60,000/year needs $1.5M to be financially independent. The FIRE Calculator goes further — it models savings rate, current assets, and expected return to show how many years until you hit that target at various contribution levels. Small increases in savings rate produce outsized reductions in time-to-FIRE.
Step 3: Consider Coast FIRE as an Intermediate Goal
Coast FIRE is the point where you have enough invested that compound growth alone will carry your portfolio to your full FIRE number by traditional retirement age — without additional contributions. Hitting Coast FIRE means you can take a lower-paying job, part-time work, or a sabbatical while your existing portfolio works in the background. The Coast FIRE Calculator shows what balance you need today at each age.
Step 4: Track Progress with Benchmarks
Use the Rule of 72 to intuitively understand growth timelines. At 7% return, your money doubles every ~10 years. At 10%, it doubles every 7.2 years. The Millionaire Calculator shows when any given starting balance + contribution rate reaches $1M — a useful milestone for motivation and planning.
Frequently Asked Questions
What is the 4% rule and is it still valid?
The 4% rule comes from the Trinity Study, which found that a portfolio withdrawing 4% annually (adjusted for inflation) survived 95%+ of historical 30-year periods. It's a starting point, not a guarantee. More conservative planners use 3.5% for 40+ year retirements. The FIRE Calculator lets you test different withdrawal rates to see how they affect your target number.
How much should I have in my emergency fund?
The standard recommendation is 3-6 months of essential expenses. The right amount depends on income stability (stable salary → 3 months; variable/freelance → 6 months), number of dependents, and how quickly you could replace your income if laid off. Keep emergency funds in liquid accounts (HYSA or money market) to earn interest while maintaining accessibility.
What is Coast FIRE?
Coast FIRE is the accumulated balance at which you can stop contributing to retirement accounts and let existing investments grow to your full FIRE number by traditional retirement age through compound returns alone. For example, if you have $500,000 at age 35 and earn 7% average returns, you'd coast to approximately $3.8M by age 65 without adding another dollar.
What savings rate do I need to retire early?
Savings rate drives time-to-FIRE more than any other variable. Saving 10% of income typically takes 40+ years. Saving 25% takes about 32 years. Saving 50% takes about 17 years. Saving 70% takes about 8.5 years. The FIRE Calculator shows this relationship explicitly — increasing savings rate by even 5-10% compresses your timeline significantly.
Should I build an emergency fund before investing in a 401(k)?
A balanced approach: first contribute enough to your 401(k) to capture any employer match (that's an immediate 50-100% return), then build your emergency fund to 1-2 months, then continue building both. A full 3-6 month emergency fund should be in place before investing beyond employer-matched contributions.