Coastline — a financial decision simulator, planner, and comparison tool

A year-by-year financial decision simulator with real US tax math: careers, housing, student loans, tax-shelter strategy, the Social Security you will actually receive, and Monte Carlo market stress-testing — with the exact calculation behind every number, one click away.

• When can I retire — and with what odds my money lasts?
• Roth conversions and conversion ladders; withdrawal orders; Social Security claim-age timing
• Federal brackets, all 50 states and DC, itemized deductions, RMDs, IRMAA, ACA credits, 72(t) and student-loan forgiveness tax — modeled with the published rules
• Free, no account needed

Free, real-numbers answers: free retirement & FIRE calculators · retirement & FIRE guides · how Coastline compares with other calculators

• Retirement calculator
• Which student loan repayment plan is best?
• FIRE number for $100k a year
• FIRE calculator
• Monte Carlo retirement simulator
• Safe withdrawal rate calculator
• Can I retire at 60 with $1M?
• How much do I need to retire at 65?
• How long will $500k last in retirement?
• What is my FIRE number?
• Rent vs buy a $400k house?
• Coastline vs cFIREsim
• Vanguard Nest Egg Calculator replacement

How the numbers are calculated · About Coastline

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