Personal Breakeven Analysis
"Will this actually pay for itself?" - answered with the same breakeven math used to justify capital equipment purchases, pointed at your coffee machine instead.
Every buy-it-once-vs-pay-per-use decision - a gym membership, a bike instead of cab rides, a coffee machine instead of café runs - has a real crossover point. This tool finds it.
01 /
The Problem.
// "is this actually worth buying?"
Purchase decisions like this get justified with a gut feeling - "I'll definitely use it enough" - rather than a number. The classic business breakeven formula (fixed cost vs. per-unit contribution) applies just as cleanly to a personal purchase as it does to a factory investment.
This tool makes the crossover point explicit: how many uses, and how many weeks at your actual usage rate, before the purchase pays for itself.
02 /
Methodology.
// contribution per use, projected forward
Contribution per Use
Savings/use = Cost/use (alternative) − Cost/use (if you buy). The per-use gap
that eventually pays back the purchase.
Breakeven Point
Breakeven Uses = Fixed Cost / Savings per Use. Directly analogous to the
fixed-cost/contribution-margin breakeven used for a new product line.
Time to Breakeven
Breakeven uses divided by your realistic uses-per-week gives a breakeven horizon in actual weeks, not an abstract unit count.
Cumulative Cost Crossover
Projects total cost under "buy" vs. "keep paying per use" forward in time - the chart's crossover point is the breakeven point, visually.
03 /
What’s in the build.
// shipped features
Any buy-vs-pay decision
Coffee machine vs café, bike vs cabs, annual pass vs pay-per-visit - same three numbers each time.
Live crossover chart
An inline SVG plot of cumulative cost for both paths, so the breakeven point is visible, not just a number.
Payback-horizon verdict
Set how long you're willing to wait to break even; the tool tells you if this purchase clears that bar.
Decision log
Every analyzed decision is saved with its verdict, so you can compare purchases side by side later.
Sample decision
A worked coffee-machine-vs-café example loads instantly so you can see the math before entering your own numbers.
Local persistence
Your decision log is saved in the browser between visits - nothing is sent anywhere.
04 /
Stack & Outcome.
// what it took, what it shipped
Stack
Outcome
Turns "I'll probably use it enough" into an actual number and a visible crossover point - the same discipline a capital-purchase justification gets, applied to a ₹3,000 decision instead of a ₹3,000,000 one.
Live Tool