FinP4l Logo FinP4l Public Benefit Project

See how the financial decisions you're considering change your future.

Retire early. Take a sabbatical. Downsize. Pay off your mortgage. Change investments. Survive a market crash. Stack 40+ real-world scenarios and instantly see the effect on your retirement age, taxes, cash flow and wealth.

🔒 100% Private ⚡ No Sign-Up Required ⏱️ Works in 5 Minutes

Financial Planning Shouldn't Require a Finance Degree

Probability Fog

Generic calculators give you probability ranges. You need definitive answers about YOUR life.

Hidden Agendas

Most tools funnel you toward product recommendations, affiliate links, or advisor upsells.

Spreadsheet Fatigue

Building a retirement spreadsheet takes hours and breaks every time your life changes.

Everything You Need. Nothing You Don't.

Your Complete Financial Timeline with Scenario Planning

See assets, income, and expenses projected year-by-year through retirement. Toggle 40+ what-if scenarios to see how life decisions shift your FI date.

Optimize Your Savings & Investments

Follow the optimal allocation waterfall: emergency fund, 401(k), HSA, Roth IRA -- ranked by tax efficiency. See the impact instantly.

Track and Model Your Spending

Model expense categories to fit your target lifestyle. Adjust spending across housing, food, travel, and more -- then see how each change shifts your retirement timeline.

Design Your Retirement Lifestyle

Choose your lifestyle, pick a retirement location, add hobbies and big purchases -- see how each choice changes your retirement expenses and timeline.

Manage Your Portfolio Through Multiple Lenses

Analyze allocation by buckets, risk, tax efficiency, and liquidity. Set custom targets, follow the glide path timeline, and get actionable rebalancing recommendations.

Your Estate: Retirement Income and Tax Strategy

Split assets between heirs and charity, generate retirement income from CRTs, and unlock tax deductions with DAFs and gifting strategies.

How Do You Stack Up?

Compare your net worth, savings rate, and retirement readiness against your demographic cohort. No judgment -- just context.

Never Miss a Critical Step

Track every retirement readiness task across Financial, Legal, Healthcare, and Housing categories.

Explore FIRE & Alternative Frameworks

Go beyond traditional retirement. Model Coast FIRE, Lean FIRE, Barista FIRE, and other strategies to find the path that fits your lifestyle and risk tolerance.

Three Steps to Financial Clarity

1

Describe Your Situation

Type naturally or connect your bank accounts via Plaid.

2

Get Your FI Date

See exactly when your assets will sustain your lifestyle.

3

Test What-If Scenarios

See the 30-year impact of any life decision instantly.

Your Data Never Leaves Your Browser

  • 🛡️ All financial data stored in your browser's local storage -- never on our servers.
  • 🔒 Bank connections via Plaid are read-only and temporary.
  • ☁️ No account creation required. No email. No password.
  • ⚡ Every calculation runs in your browser. Transparent math, no black boxes.

A Financial Wellness Initiative

FinP4l is a public benefit project by DI SW, LLC. We believe financial clarity should be accessible to everyone -- not just those who can afford an advisor.

No Ads No Premium Tiers No Data Selling No Commissions

Built For Your Stage of Life

🔥 Pursuing FIRE?

Calculate your FI number, model coast FIRE vs lean FIRE vs fat FIRE, optimize Roth conversion ladders.

  • FIRE number calculator
  • Roth conversion ladder planning
  • Geographic arbitrage modeling

🌴 Approaching Retirement?

Model Social Security timing, pension integration, Medicare costs, and RMDs.

  • Social Security optimization
  • Pension + 401k coordination
  • Safe withdrawal rate analysis

🎯 Planning Life Decisions?

Career changes, starting a family, buying property - see how decisions ripple through your future.

  • Career change impact
  • Family planning costs
  • Real estate scenarios

40+ Real-Life Decisions You Can Simulate

Career & Income

  • • Job loss / career gap
  • • Starting a business
  • • Going part-time
  • • Take a sabbatical
  • • Retire early

Family & Life

  • • Having children
  • • College funding (529)
  • • Supporting aging parents
  • • Inheritance planning

Property & Assets

  • • Buying a home
  • • Investment property
  • • Downsize your home
  • • Pay off your mortgage early
  • • Home renovation
  • • Relocating (lower COL)

Market & Strategy

  • • Survive a market crash
  • • Change your investment mix
  • • Inflation surge
  • • Long-term care event
  • • Roth conversion ladder
  • • Early Social Security
  • • Annuity vs investments

Frequently Asked Questions

What is a financial decision simulator?

A financial decision simulator lets you model a decision you are actually weighing - retiring early, taking a sabbatical, downsizing, paying off your mortgage, changing your investment mix - and see what it does to your future. FinP4l projects your assets, income, expenses and debts year by year, then re-runs the whole projection with the decision applied so you can compare before and after on the same chart.

Which financial scenarios can I model?

More than 40, grouped into career and income (job loss, going part-time, a sabbatical, starting a business), family and life (having children, college funding, supporting aging parents, inheritance), property and assets (buying a home, an investment property, downsizing, relocating to a lower cost of living, a renovation, paying off the mortgage early) and market and strategy (a market crash, an inflation surge, long-term care, a Roth conversion ladder, changing your investment allocation, claiming Social Security early).

Can I stack more than one scenario at a time?

Yes. Scenarios are toggles on one shared timeline, so you can run a sabbatical in year 3, a downsize in year 8 and a market crash in year 12 together and see the combined result. Toggle any single scenario off to isolate what it was contributing.

Does it show the tax impact of a decision?

Yes. The projection computes tax year by year - ordinary income, long-term capital gains stacked on the real 0/15/20 bands, tax-deferred contributions, Roth conversions and the taxable portion of Social Security. A decision that looks good before tax will still show its real after-tax cost.

How is this different from a retirement calculator?

A retirement calculator answers one question from one set of inputs: will I have enough. A decision simulator starts from a decision you are considering and shows what changes because of it - how many years earlier or later you reach financial independence, what happens to cash flow in the years around the decision, and what it costs in tax.

Why scenario modeling instead of Monte Carlo simulations?

Monte Carlo gives probability ranges. For real life planning, you need to model specific high-impact events and build concrete contingency plans. Our deterministic engine gives you actionable conviction, not probability fog.

Do I need to sign up or create an account?

No. There is no account, no email and no sign-up. Open the app, describe your situation and start testing decisions.

Where is my data stored?

100% data sovereignty. Everything stays in your browser's local storage. Your financial data never touches our servers. You own and control your data completely.

Is FinP4l really free? What's the catch?

Yes, completely free. FinP4l is a public benefit project by DI SW, LLC. No ads, no premium tiers, no selling data, no commissions.

Can I calculate my FIRE number?

Yes. FinP4l calculates your FI number based on your expenses and withdrawal rate, and shows when you'll reach financial independence with interactive projections.