Skip to main content
STWLTH
Tools
Free
Compound Growth Simulator
Investment growth over 40 years
FIRE Number Calculator
Your financial independence number
Coast FIRE Calculator
Can you stop contributing?
Lifestyle Inflation Detector
What lifestyle creep cost you
Mortgage Calculator
Monthly payments and amortization
DebtLOC Payoff Simulator
Velocity banking — real math, no courses
Paycheck Allocation Optimizer
401k / HSA / Roth / brokerage split
Side Income Impact Simulator
How much a side hustle shifts FIRE
Tax Bracket Calculator
Federal + FICA, marginal & effective
Premium
Salary Negotiation Impact Simulator
The cost of not asking
Job Offer Comparison Tool
True total comp, side by side
Rent vs Buy Simulator
Honest math on renting vs buying
"One More Year" Calculator
Is one more year worth it?
ACA Bridge Planner
Health insurance until Medicare
Roth Conversion Ladder
Fund the pre-59½ gap, tax-smart
Withdrawal Order Optimizer
Which account do you drain first?
Equity Compensation Calculator
RSU sell-vs-hold, tax-aware
Sequence Risk Simulator
Bucket strategy vs bad first decade
Social Security Optimizer
Retire early — what happens to SS?
Pricing
Resources
About
Why we built STWLTH
Principles
What we'll never do
Compare
vs ProjectionLab & Boldin
FAQ
Common questions
Blog
Articles & insights
Changelog
What's new
Shop
Coming Soon
Shop
STWLTH merch and gear. Coming soon.