Retirement Scenario Explorer

Free calculation meets one-time optimization

Retirement Scenario Explorer is a web-based retirement planning tool built by RetirementScenario.com, designed as an alternative to the traditional wealth advisor path. The platform runs 1,000 simulations of your specific financial situation instead of applying generic rules of thumb, showing you a probability rather than a single answer. It costs nothing to explore your numbers, and a one-time $79 payment unlocks the deeper advisory features. Critically, you do not need to create an account or sign up to calculate. The separation between free calculation and paid optimization is the core design choice here.

Running your situation through a thousand market futures

The income layer is where most retirement calculators fail or mislead. This platform starts by asking your age, target retirement age, and expected monthly spending in plain language, then captures your Social Security claiming strategy separately. Those are the inputs that feed the simulation. The mechanics of getting income into the system are straightforward: you enter figures directly. There is no bank connection, no Plaid integration, no upload process. The platform does not sync to your brokerage. You provide your current net worth as a single number, broken down into taxable, tax-deferred, and Roth if you want precision, and that becomes your starting portfolio. Social Security modeling is actuarially correct, meaning it accounts for the permanent reduction at age 62 and the permanent increase at age 70 with the benefits for each age in between. The refresh rate is immediate: change a number and the simulation reruns. If you stop entering data, nothing breaks. The tool is built for exploration, not for keeping a live connection to your accounts. That design accepts lower precision in exchange for complete privacy and no setup friction.

Monte Carlo simulation as the workflow

The budgeting and planning workflow here is driven by the simulation itself. You start by telling the tool about yourself and your situation, then it runs 1,000 market simulations through a projection to age 90, showing you what percentage of those simulations sustain your plan. The interface calls this "success rate," expressed as a percentage. One hundred simulations might show a 78% success rate in years 65 to 67, flagging the bridge years between early retirement and Social Security as the soft spot. The platform surfaces this visually and then offers "Smart Moves" tailored to your numbers: Max your 401k, Max your Roth, Phase your retirement spending, or Start an HSA. You toggle moves on and watch the projection change in real time. You see what the math says will shift the metric you picked (retire earlier, spend more, leave a legacy, weather a downturn). The AI Advisor, included in the paid tier, reads your plan and proposes specific changes, staying conversational rather than dictatorial. It can model Roth conversions, bridge funds, and Social Security claiming strategies specific to your situation. This is not a category-and-track budgeting app. It is forward-looking scenario modeling, grounded in the assumption that your real retirement decision depends on assumptions you have not made yet.

Tax optimization is integrated into the projection. The tool models tax-optimal withdrawal order (taxable accounts, then tax-deferred, then Roth), calculates the Roth conversion sweet spot for your specific income trajectory, and accounts for the way brokerage gains push Social Security into higher tax tiers. The engine applies 2026 federal brackets, inflation-adjusted forward, and models capital gains tax stratified 0/15/20% by your actual income in each year. State tax codes are applied by real structure, including which states exclude retirement income and which apply preferential capital gains rates. The documentation notes that a retiree with $100,000 in brokerage gains and $40,000 in Social Security can pay roughly $5,000 more in tax than free calculators predict. Stress testing is built into the model. You can test what happens in a severe market crash in year one (a -40% scenario), model long-term care costs, test sustained inflation at 5%, model living to age 100, or model the loss of a spouse's Social Security. Each stressor shows you the impact on your success rate, and the AI can then recommend moves to soften the blow.

The free tier runs 1,000 simulations; the $79 Navigator tier adds the AI and move modeling

The site states clearly that the Free tier is free to calculate. No cost, no credit card required. The Free tier includes 1,000-simulation Monte Carlo analysis, stress testing against market crashes and inflation, tax-optimal withdrawal modeling, the Roth conversion sweet spot calculation, actuarially correct Social Security, year-by-year projection out to age 90, and progress check-ins over time. You also get one deep AI analysis and three conversations with the AI advisor at this level. The Navigator tier is $79, paid once, with no subscription or renewal. The site explicitly states "No subscription. Ever." The Navigator tier adds 25 deep AI analyses and 50 conversations with the AI Advisor that reads your plan, Smart Moves (the moves-specific-to-your-numbers feature), Deep Search (ten optimizers including spousal coordination and one-click Deep Scan), AI Plan Score (a holistic plan strength metric beyond raw Monte Carlo), the ability to save and compare scenarios side by side, and PDF export for your CFP or family. The page does not spell out anything you lose if you stick with the free tier, which is itself useful information. The calculator runs in your browser and you can save your plan locally. Your data does not leave your device unless you choose to export it.

Who finds this tool useful, who might look elsewhere

This tool suits anyone five or more years from retirement who wants to skip the wealth-advisor appointment and the subscription. The $79 one-time cost and the account-free calculation path make it accessible for someone who wants to run scenarios alone before talking to a financial planner, or who simply wants to know their real numbers without the sales funnel. The math is deep (1,000-path Monte Carlo, state-by-state tax modeling, actuarial Social Security), which appeals to the FIRE community and to self-directed planners who want to verify assumptions. The AI Advisor adds judgment to the numbers without asking you to trust it blindly. The platform acknowledges this by saying "Some plans need a human" and describing itself as a tool that helps you know what you need next, not as a replacement for a CFP appointment. A real limitation is that the tool is forward-modeling only. It cannot connect to your actual accounts, so your numbers are only as good as the figures you enter. It also does not handle outside-the-USA scenarios directly, though the interface and the documentation focus on US Social Security rules and state taxes. The tool is not for couples where one person uses it and the other does not, because it models spousal coordination but asks for coordinated inputs upfront. For someone who wants automated account sync and ongoing tracking, this is a planning tool, not a day-to-day app. For someone who wants to avoid the advisor sales funnel and knows their rough numbers, this is exactly the right price and depth.