Financial decision simulator

Should I retire early, switch careers, or stay the course?

Pick a question, enter three numbers, and see two paths compared side-by-side over 50+ years — so you stop guessing and start deciding.

Retire at 55
Net Worth Projection
Net Worth Projection
$0$3M$5M$8MAge 35Age 45Age 55Age 65Age 75Retire$5M
Retirement
2045 vs 2055
10 years earlier
Peak Delta
+$1.03M
A leads at age 52
Terminal
$6.1M vs $6.8M
B: +$685K
50+ year
projection horizon
2 scenarios
free to compare
Real-time
interactive modeling

Pick a Question, Get an Answer

Choose the decision you're facing. We'll build the comparison for you.

Start With a Question

Retiring early? Career change? Big purchase? Pick the decision you're facing and we'll set up two scenarios to compare.

See Two Paths Diverge

Your dashboard shows two trajectories side-by-side over 50+ years. See exactly where the paths split and by how much.

Refine and Explore

Adjust any assumption, add life events, or create more scenarios. One-off expenses never permanently inflate your trajectory.

Five Charts, One Decision

Every chart updates in real-time as you adjust assumptions.

Net Worth
Withdrawal Rate
Income vs Expenses
Account Breakdown
Savings Rate

Built for Comparison

Each scenario uses its own CAGR, expense growth, and retirement year while sharing a common configuration baseline. See how different decisions ripple across your entire financial timeline.

Overrides are non-compounding — a one-off expense spike won't permanently inflate your trajectory.

ParameterWork til 65Retire at 55Career Change
Pre-Ret CAGR8%10%9%
Ret CAGR7%7.5%7.5%
Inflation2.5%2.5%2.5%
Expense Growth (Pre)0.5%0.5%0.5%
Expense Growth (Post)2.0%2.0%2.0%
Retirement Year205520452048
Base Expenses$100K$100K$100K
CB

Built to answer ‘What if?’

I spent years running my financial projections in a sprawling Excel workbook. Every time I wanted to answer a simple question — “What if I retire five years early?” or “What if the market returns less than I expect?” — I had to duplicate sheets, rewire formulas, and cross-check everything by hand. So I turned it into an app where you pick the question you're trying to answer, and the comparison builds itself.

— Chad, creator of FI-Project

What People Are Deciding

I've always set long-term goals — I just never knew if I was on track. This platform lights the path, so I can make smart moves today toward financial independence.

Matt
Early adopter

The non-compounding overrides are a game changer. A year of high tuition doesn't wreck my entire projection like it did in my spreadsheet.

Early access user
FIRE community member

Simple enough to set up in 10 minutes, powerful enough that I stopped maintaining my own spreadsheet.

Early access user
Software engineer

Not ready to sign up yet?

Drop your email and we'll send you a link when you're ready — plus ideas for financial what-ifs you haven't considered yet.

Your next big decision deserves more than a guess

Pick a question, enter three numbers, and see two paths compared instantly. Free tier includes 2 scenarios and the full projection engine — no credit card needed.

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