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The 50/30/20 rule is a classic budgeting framework: 50% of income goes to needs (fixed costs), 30% to wants (your spend zone), and 20% to savings. This calculator adapts it to your actual numbers.
After subtracting your fixed costs and savings goal, whatever is left is your discretionary money. Your safe spend zone is 70% of that — keeping a 30% buffer for unexpected costs even after savings are covered.
Spending 70–90% of discretionary = caution zone. Spending 90–100% = danger zone — one surprise expense breaks everything. Read the full breakdown →
Enter your savings goal and deadline. We calculate exactly how much you need to set aside each day, week, and month to hit it on time. No math needed — just your goal and your timeline.
Coast FIRE is when your current investments — with zero future contributions — will grow to your full FIRE number by retirement age. Once you hit it, you only need to cover living expenses. No more saving for retirement.
Barista FIRE = quit your full-time job early, do fun part-time work to cover living expenses, and let your investments grow to full FIRE. You need a much smaller portfolio because your side income fills the gap.