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FutureZ
Summary
Most retirement calculators hand you a single projection — one optimistic line that assumes nothing goes wrong — which is precisely useless when you're deciding whether to take a lower-paying job you actually want or retire three years early.
FutureZ runs your actual account balances and income streams through 1,000 simulated market histories, then surfaces a success percentage and a fan of outcomes — not a single number to believe in. The tax engine models Roth conversions and ladder strategies, so the simulator can tell you that a Roth ladder could save $18k in taxes rather than leaving you to guess. The AI layer (Claude) accepts natural-language what-if questions and returns scenario comparisons, though it operates as a one-shot query rather than an ongoing planner that tracks your decisions. Couples modeling joint accounts across multiple vehicles — 401(k), Roth IRA, HSA, brokerage — get a shared view that most household spreadsheets never achieve. Where it stops: if your financial life involves business income, equity compensation, or variable expense structures, the fixed input model starts showing its edges.
Bottom line: FutureZ earns its place for a dual-income household stress-testing retirement timing — but if your income is irregular or your tax situation requires modeling that goes beyond standard account types, you'll hit the simulator's fixed assumptions before you hit the answers you need.
Pricing Plans
Subscription- Price
- $89/yr
- Free Tier
- 100K AI credits per month; limited simulations
Free
100K AI credits/month, limited simulations
- 1,000 market futures
- Tax engine
- AI chat
Paid
Unlimited simulations and 2.5M AI credits/month
- Version history
- No limits on rules
View full pricing on futurezapp.com →
Pricing may have changed since last verified. Check the official site for current plans.
Community Performance Report Card
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Pros
Sign in to edit- Runs 1,000 market simulations per scenario rather than a single projection, so a reported 88% success rate means 880 of 1,000 simulated histories ended with money remaining — not a single optimistic forecast dressed as a plan.
- Tax-aware Roth ladder modeling included in the engine, so you can see the after-tax dollar impact of a conversion strategy rather than calculating it separately and hoping the interaction with your withdrawal sequence is correct.
- Benchmarked against Morningstar and the Trinity Study with intentionally conservative calibration, which means the success percentages are less likely to mislead you into an early retirement the math does not actually support.
- Joint household modeling across multiple account types — 401(k), Roth IRA, HSA, brokerage — in a single simulation, so couples avoid the error of running separate projections that never account for shared spending drawdowns.
- No signup required to start a simulation, which means you can test the tool against your actual numbers before committing any account to it.
Cons
Sign in to edit- The input model is built around standard salaried income and conventional account types. Self-employed users, those with equity vesting schedules, or anyone with irregular annual income must flatten their finances into fixed inputs — at which point the 1,000 simulated outcomes are only as good as the approximation you fed in, and the precision of the engine stops compensating for the imprecision of the inputs.
- The AI query layer is a one-shot question-and-answer interface, not a persistent planning agent. It does not remember previous scenarios, track decisions over time, or flag when your inputs drift from your actuals — which means the ongoing monitoring work stays entirely with you, and teams that need automated alerting or advisor-compatible reporting move to dedicated financial planning platforms instead.
- There is no self-hosted option, so users with strict data residency requirements or organizations building internal financial tools cannot run the engine on their own infrastructure, which is the condition under which a team moves to an open-source Monte Carlo framework or an advisor platform with on-premise deployment.
About
- Platforms
- Web
- API Available
- Yes
- Self-Hosted
- No
- Last Updated
- 2026-09-09T01:02:31.594Z
Best For
Who it's for
- Individuals planning retirement without advisors
- Couples modeling joint finances and decisions
- Users wanting probabilistic outcomes over single projections
What it does well
- Model retirement success rates across scenarios
- Compare impacts of job changes or early retirement
- Simulate tax-optimized strategies like Roth ladders
- Track household net worth and milestones over time
Integrations
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Sign Up to ContributeFrequently Asked Questions
- Is FutureZ free?
- FutureZ has a permanent free tier alongside paid upgrades (paid plans from $89/yr). You can keep using a baseline version indefinitely without paying.
- Is FutureZ open source?
- No — FutureZ is a closed-source tool. Source code is not publicly available.
- Does FutureZ have an API?
- Yes. FutureZ exposes a developer API. See the official documentation at https://futurezapp.com for details.
- What platforms does FutureZ support?
- FutureZ is available on: Web.
Curated lists that include this category
The problem with single-line forecasts
Most retirement calculators hand you a single projection — one optimistic line that assumes nothing goes wrong — which is precisely useless when you’re deciding whether to take a lower-paying job you actually want or retire three years early.
Scenario modeling and tax handling
FutureZ runs your actual account balances and income streams through 1,000 simulated market histories, then surfaces a success percentage and a fan of outcomes. The tax engine models Roth conversions and ladder strategies, so the simulator can show the after-tax dollar impact of a conversion rather than leaving you to guess. The AI layer accepts natural-language what-if questions and returns scenario comparisons. It operates as a one-shot query rather than an ongoing planner.
Limitations in input flexibility
The input model is built around standard salaried income and conventional account types. Self-employed users or those with irregular income must flatten their finances into fixed inputs, at which point the simulated outcomes are only as good as the approximation fed in.
Who it is for / who should skip it
FutureZ suits individuals planning retirement without advisors, couples modeling joint finances, and users wanting probabilistic outcomes over single projections. Skip it if you need a persistent planning agent or work with equity vesting schedules and non-standard income, since the engine does not track decisions over time or compensate for imprecise inputs.