Minimalist Budget Calculator
Set a lean spending target from your income, see the savings it frees up, and how fast a minimalist budget builds an emergency fund.
How it works
Spending = income × spend% · Savings = income − spending · Savings rate = 100% − spend% · Emergency fund = spending × 6
A minimalist budget flips the usual approach: instead of saving what is left after spending, you set a lean spending ceiling and save the rest. Keeping fixed and discretionary costs to a deliberate share of income produces a high savings rate, which is the single biggest driver of how fast you reach financial goals. This calculator shows the target spend, the savings it unlocks, and how quickly it funds a safety net.
Worked example
On $5,000/month with a 50% spending target, you live on $2,500 and save $2,500 — a 50% savings rate, or $30,000 a year. A six-month emergency fund of $15,000 (six months of the $2,500 spend) is fully funded in about 6 months.
Frequently asked questions
Why base the budget on a spending target?
Capping spending first locks in your savings rate, which research and FIRE math both show is the dominant factor in reaching financial independence. Saving whatever is left over tends to leave far less.
Is a 50% savings rate realistic?
It is ambitious and depends heavily on income and cost of living, but many people in the FIRE community aim for 40–70%. Even moving your rate up by a few points meaningfully shortens the time to your goals — start with a target you can sustain.
Why size the emergency fund off spending, not income?
An emergency fund needs to cover your actual expenses if income stops, so it is measured in months of spending. A leaner budget therefore needs a smaller emergency fund, which is another advantage of minimalist spending.
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Educational estimate, not financial advice.