All Tools
206 free simulators to help you make better life decisions.
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Financial Tools
(41)
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Career & Psychology
(15)
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Health & Habits
(11)
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Time & Productivity
(12)
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Learning & Skills
(9)
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Housing & Property
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Family & Life Events
(11)
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Sustainability & Green Living
(5)
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Entrepreneurship
(22)
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Transportation & Vehicles
(6)
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Investing & Wealth Building
(12)
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Risk & Resilience
(12)
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Retirement & Aging
(13)
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Debt & Credit
(12)
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Relationships & Money
(14)
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Education & Student Debt
(14)
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Tax Strategy
(17)
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Digital Spending & Subscriptions
(14)
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Estate Planning
(14)
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Caregiving & the Sandwich Generation
(11)
💰 Financial Tools
41 tools →"Will I have enough?"
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Buy vs. Subscribe
Compare the true cost of buying outright vs. recurring payments.
Compound Interest
Visualize real returns after inflation.
Rent vs. Buy
Full financial picture of renting vs. homeownership.
FIRE Calculator
Monte Carlo simulation of your path to financial independence.
Personal Inflation
Build your spending basket and discover your real inflation rate.
Loan Payoff
Pay off debt faster or invest the extra?
Opportunity Cost
What would this money be worth if invested instead?
DCA vs Lump Sum
Invest all now or spread it out? Monte Carlo simulation.
Value Averaging vs DCA
Edleson's Value Averaging on 5 market regimes — terminal, IRR, and the cash drag VA quietly demands.
Dividend Income
How much monthly income can you build from dividends?
DRIP vs Cash Dividends
Reinvest dividends for the snowball, or take them as income? See the wealth gap.
Salary Impact
How much is a small raise really worth over a career?
Tech TC Breakdown
Software engineer total comp: base + bonus + RSU + 401(k) + ESPP, COL-adjusted across cities.
RSU Vesting + Cliff Trap
How equity grants pay out under cliff + vest schedules. What you forfeit if you leave year 1.
ISO Exercise + AMT
The phantom tax bill on ISO exercise — see your AMT, total cash needed, and break-even sale price.
Promo vs Job Hop
5-year TC under both paths, probability-weighted, with new-job cliff penalty modeled honestly.
Stock Valuation
Is this stock fairly priced? 11 valuation methods.
Net Worth
Assets minus debts — your financial snapshot in one number.
Savings Goal
When will you hit your savings target with compound growth?
Mortgage Calculator
Monthly payment, total interest, and amortization breakdown.
Budget Calculator
The 50/30/20 rule — customized for your income.
Emergency Fund
How big should your emergency fund really be? Risk-scored — 3, 6, 9, or 12 months based on your specific situation.
Investment Fee Drag
What fund expense ratios actually cost you. The compounding 1% that eats 25-30% of your terminal wealth over 30 years.
Roth vs Traditional
Apples-to-apples after-tax comparison: Roth vs Trad + side taxable. See how marginal-rate differential actually decides the winner.
HSA Optimizer
Triple-tax-advantage math: spend, stealth-Roth invest, or skip HSA — which actually wins on your numbers?
Life Insurance Needs
How much coverage does your family actually need?
Insurance IRR
What's the real return on your insurance policy?
Renovation ROI
Will this renovation increase property value enough to justify the cost?
Utility Savings
Will energy-efficient upgrades pay for themselves?
Solar ROI
Is installing solar panels worth it?
Car Ownership
Buy, lease, or take public transit — which saves the most?
EV vs Gas
Is an electric car actually cheaper than gas over time?
Used Car Cost
The true cost of owning a used car, including repairs and depreciation.
Freelancer Rate
What hourly rate do you need to charge to hit your income goal?
Startup Cost
How much runway do you need before launching a business?
Side Hustle Income
What can you realistically earn from a side hustle after costs and taxes?
Debt Payoff Strategy
Avalanche vs. Snowball vs. Minimum-Only — see which strategy saves the most interest and how it compares to investing instead.
Retirement Withdrawal Calculator
How long will your savings last? Model withdrawals, inflation, and safe withdrawal rate.
401(k) Tax Savings Simulator
Pre-tax retirement contribution this year + the compounded retirement balance — both timescales at once. Shows the surprisingly small paycheck hit after the IRS rebates your marginal rate.
Tax Refund Opportunity Cost
Your refund is a 0% loan to the government. See what those withholdings would have grown to if invested instead.
Cash Yield After Tax
Savings account, T-bill or muni: which leaves you the most after federal and state tax?
🧠 Career & Psychology
15 tools →"Am I on the right path?"
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Career Aptitude (RIASEC)
30-question assessment to find your career fit.
Stress Cost
How much is chronic stress actually costing you?
Meeting Cost
The true cost of that recurring meeting in time and money.
Screen Time Cost
What is your screen time really costing you in lost hours?
Social Media Time
How much life are you scrolling away each year?
Procrastination Cost
What does delaying 1 year cost you in compound growth?
Job Offer Comparison
Compare two job offers: total comp, commute cost, equity, and 5-year wealth impact.
Tech TC Breakdown
Software engineer total comp: base + bonus + RSU + 401(k) + ESPP, COL-adjusted across cities.
RSU Vesting + Cliff Trap
How equity grants pay out under cliff + vest schedules. What you forfeit if you leave year 1.
ISO Exercise + AMT
The phantom tax bill on ISO exercise — see your AMT, total cash needed, and break-even sale price.
Promo vs Job Hop
5-year TC under both paths, probability-weighted, with new-job cliff penalty modeled honestly.
Career Switch Runway
Quit, retrain, start lower: do your savings last, and when does the new career really catch up?
Decision Detox
Rank your options through pairwise comparison — cut through indecision one A-vs-B at a time.
Social Energy Battery
Map your week's events and predict when your social energy hits the danger zone.
Regret Simulator
Compare action vs. inaction regret across 1, 5, and 10-year horizons. Fear fades. Regret grows.
💪 Health & Habits
11 tools →"What will this habit cost me?"
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Habit Compound Simulator
What does a daily 30-minute habit compound to in 5 years? Linear time vs exponential skill.
Body Composition Simulator
Mifflin-St Jeor + TDEE — project your weight + BMI 6 months out at any calorie delta.
Sleep Cycle Simulator
90-min cycle alignment + sleep debt + intervention comparison. When to wake to feel rested.
Exercise ROI
Is your gym membership paying for itself in healthcare savings?
Sleep Impact
How much is sleep deprivation costing you in productivity and health?
Caffeine Cutoff
How much caffeine is still in your body at bedtime, and the latest your last cup can be.
Sitting Cost
The hidden healthcare cost of sitting all day at a desk.
Diet Habit Simulator
What does a daily food or drink habit cost over 10 years?
BMI Calculator
Your Body Mass Index, healthy weight range, and where you stand.
Water Intake
How much water should you actually drink based on your body and habits?
Health Insurance Comparison
Low premium vs high premium — which plan actually costs less for you?
⏰ Time & Productivity
12 tools →"What is my time really worth?"
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Real Hourly Rate
Your true pay after commute, prep time, and work expenses.
Commute Cost
Live close (high rent) or far (cheap rent + commute) — which costs less?
Procrastination Cost
What does delaying 1 year cost you in compound growth?
Overtime Value Calculator
What do you actually take home per overtime hour after taxes and commute?
Purchase Hours Calculator
How many hours of work does this purchase cost you?
Remote Work Savings
How much does working from home save you annually in commute, food, and reclaimed time?
Geo-Arbitrage Calculator
Same salary, different city — savings rate boost + 10-year wealth gap from relocating.
Remote Pay Cut Tradeoff
Company offers remote with -15% pay cut. Break-even cut % and 10y wealth impact.
Digital Nomad Tax
US person abroad with FEIE + FTC + state-claim modeling. Honest tax-burden comparison.
Sabbatical ROI
Honest cost of taking 6, 12, 18 months off — cash + foregone earnings + lifetime compound.
Slow Travel vs Rent
Going abroad 3-12 months: keep empty, sublet, or break lease — cheapest option detected.
FIRE Abroad
Retire in Lisbon/Mexico/Bangkok with 50%+ less savings — COL + healthcare adjusted SWR target.
📚 Learning & Skills
9 tools →"Is this worth learning?"
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Skill Investment ROI
Is learning this skill worth the time and money?
Learning Time Estimator
How many hours to reach your target skill level?
Certification Value
Is this certification worth getting?
Language ROI
Is learning a new language worth the investment?
Online Course Value
Is this course worth the price — accounting for completion rates?
Book ROI
Is reading this book worth the time investment?
Tuition Reimbursement Clawback
The $5,250 tax-free limit and a leave-early clawback clause can combine into a net loss. See the real number.
Tutor vs Self-Study
A tutor's fee only pays off above a specific break-even hourly rate. See where your own time value lands.
Conference / Networking ROI
Registration and travel are the visible cost. Lost workdays are the invisible one — price the whole trip.
🏠 Housing & Property
16 tools →"Is this the right place to live?"
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Rent vs. Buy
Full financial picture of renting vs. homeownership.
Mortgage Calculator
Monthly payment, total interest, and amortization breakdown.
Renovation ROI
Will this renovation increase property value enough to justify the cost?
Solar ROI
Is installing solar panels worth it?
Utility Savings
Will energy-efficient upgrades pay for themselves?
Moving Cost
True relocation cost and break-even timeline when moving to a cheaper area.
Rental Property ROI
Full investment model: NOI, cash-on-cash, IRR, vacancy, and tax impact over your holding period.
Fix & Flip ROI
Model fix-and-flip profit: renovation, loan interest, capital gains tax, and break-even sale price.
Airbnb vs. Long-Term Rental
Compare short-term vs long-term rental profit after platform fees, taxes, and occupancy reality.
Home Trade-Up Calculator
Plan your move up: net sale proceeds, new mortgage, cash requirements, and max home price.
HELOC vs Cash-Out Refi
Don't reset a cheap locked-in rate to tap a small amount of equity — compare both paths honestly.
Mortgage Points Buydown
Paying upfront to lower your rate only pays off if you keep the loan past the exact breakeven month.
PMI Removal
Overpay to kill PMI faster, or invest that money instead? See the exact breakeven.
1031 Exchange Tax Deferral
A like-kind exchange defers capital gains and depreciation recapture tax — see what the deferred money is worth kept invested.
Bridge Loan Cost
Buy before you sell — compare a bridge loan's real cost against a flat-fee fintech alternative.
Property Management vs Self-Manage
An 8-12% management fee only makes sense above your own break-even hourly rate. See where you land.
👨👩👧 Family & Life Events
11 tools →"Am I prepared for the big moments?"
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Child-Raising Cost
How much does it cost to raise a child from birth to 18?
Education Fund Planner
How much to save monthly for your child's education goal?
College Savings
How much to save monthly to cover future tuition costs?
Wedding Budget
Wedding cost breakdown + opportunity cost of that budget.
Moving Cost
True relocation cost and break-even timeline when moving to a cheaper area.
Pet Cost
The true lifetime cost of pet ownership — no surprises.
Reusable vs Disposable
When does buying a reusable item pay for itself?
Carbon Footprint
Your CO2 emissions and what it would cost to offset them.
Adoption Tax Credit
The $17,280 federal credit caps out and phases out by MAGI — see your real net cost after it.
Parental Leave Income Gap
FMLA guarantees your job, not your pay. See what your leave actually replaces once employer and state benefits stack.
Funeral Cost Pre-Planning
Funeral costs are outrunning inflation. See what locking in today's price actually saves.
🌱 Sustainability & Green Living
5 tools →"Is my lifestyle hurting the planet?"
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Solar ROI
Is installing solar panels worth it?
Utility Savings
Will energy-efficient upgrades pay for themselves?
Carbon Footprint
Your CO2 emissions and what it would cost to offset them.
Reusable vs Disposable
When does buying a reusable item pay for itself?
EV vs Gas
Is an electric car actually cheaper than gas over time?
🚀 Entrepreneurship
22 tools →"Is working for myself viable?"
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Freelancer Rate
What hourly rate do you need to charge to hit your income goal?
Startup Cost
How much runway do you need before launching a business?
Cloud Bill Estimator
AWS/GCP/Azure cost estimate for solo dev / small team. The egress trap line included.
SaaS Metrics → Profitability
LTV, CAC, churn, payback — and the month MRR replaces your day-job take-home.
Founder Salary Sustainability
What's the safe salary your indie SaaS can pay you today, given MRR, margin, and tax reserve?
S-Corp Election
Sole prop vs S-Corp — does the payroll-tax savings on your income clear the extra compliance cost?
Startup Runway Simulator
Month-by-month cash burn vs revenue ramp — when does the money actually run out, or do you hit breakeven first?
Co-Founder Equity Split
A transparent, weighted formula for splitting equity by idea, time, capital, and experience — not a coin flip.
Contractor vs Employee Cost
An $80K salary can cost $110K fully loaded — compare it to a contractor's quoted rate honestly.
Equity Dilution Simulator
Model your ownership through seed, Series A, and Series B — a 100% stake can shrink to 65% before any option-pool refresh.
Freemium Conversion Economics
Does your free tier pay for itself? Find the exact conversion rate where free-tier cost breaks even.
Small Business Valuation
Revenue multiple, EBITDA multiple, and DCF, side by side — so you see where they agree and where they don't.
Side Hustle Income
What can you realistically earn from a side hustle after costs and taxes?
Real Hourly Rate
Your true pay after commute, prep time, and work expenses.
Procrastination Cost
What does delaying 1 year cost you in compound growth?
Remote Work Savings
How much does working from home save you annually in commute, food, and reclaimed time?
Geo-Arbitrage Calculator
Same salary, different city — savings rate boost + 10-year wealth gap from relocating.
Remote Pay Cut Tradeoff
Company offers remote with -15% pay cut. Break-even cut % and 10y wealth impact.
Digital Nomad Tax
US person abroad with FEIE + FTC + state-claim modeling. Honest tax-burden comparison.
Sabbatical ROI
Honest cost of taking 6, 12, 18 months off — cash + foregone earnings + lifetime compound.
Slow Travel vs Rent
Going abroad 3-12 months: keep empty, sublet, or break lease — cheapest option detected.
FIRE Abroad
Retire in Lisbon/Mexico/Bangkok with 50%+ less savings — COL + healthcare adjusted SWR target.
🚗 Transportation & Vehicles
6 tools →"What is my car really costing me?"
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Car Ownership
Buy, lease, or take public transit — which saves the most?
EV vs Gas
Is an electric car actually cheaper than gas over time?
Used Car Cost
The true cost of owning a used car, including repairs and depreciation.
Commute Cost
Live close (high rent) or far (cheap rent + commute) — which costs less?
E-Bike vs Car Commute
What riding instead of driving really saves, how fast the bike pays off, and what it costs in time.
Remote Work Savings
How much does working from home save you annually in commute, food, and reclaimed time?
📈 Investing & Wealth Building
12 tools →"Is my money working hard enough?"
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Compound Interest
Visualize real returns after inflation.
DCA vs Lump Sum
Invest all now or spread it out? Monte Carlo simulation.
Value Averaging vs DCA
Edleson's Value Averaging on 5 market regimes — terminal, IRR, and the cash drag VA quietly demands.
Dividend Income
How much monthly income can you build from dividends?
DRIP vs Cash Dividends
Reinvest dividends for the snowball, or take them as income? See the wealth gap.
Stock Valuation
Is this stock fairly priced? 11 valuation methods.
Opportunity Cost
What would this money be worth if invested instead?
FIRE Calculator
Monte Carlo simulation of your path to financial independence.
Loan Payoff
Pay off debt faster or invest the extra?
Investment Fee Drag
What fund expense ratios actually cost you. The compounding 1% that eats 25-30% of your terminal wealth over 30 years.
Roth vs Traditional
Apples-to-apples after-tax comparison: Roth vs Trad + side taxable. See how marginal-rate differential actually decides the winner.
401(k) Tax Savings Simulator
Pre-tax retirement contribution this year + the compounded retirement balance — both timescales at once. Shows the surprisingly small paycheck hit after the IRS rebates your marginal rate.
🛡️ Risk & Resilience
12 tools →"What if something goes wrong?"
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Emergency Fund
How big should your emergency fund really be? Risk-scored — 3, 6, 9, or 12 months based on your specific situation.
Medical Event Cost Estimator
What would an ER visit, surgery, or hospital stay cost YOU given your plan's deductible / coinsurance / OOP max?
Life Insurance Needs
How much coverage does your family actually need?
Health Insurance Comparison
Low premium vs high premium — which plan actually costs less for you?
Insurance IRR
What's the real return on your insurance policy?
Disability Income Gap
If you couldn't work for 6 months / 2 years, how long would savings + SSDI + LTD + spouse last?
Term vs Whole Life
Buy term and invest the difference, or pay for permanent cash-value coverage? See which wins over your own horizon.
Deductible Optimizer
Raising your deductible saves premium — but only pays off below a specific claim frequency. Find your breakeven.
Travel Insurance Value
Is that $150 policy worth it for your trip cost, cancellation risk, and medical-abroad exposure?
Umbrella Insurance Value
Your liability limits cap out fast — see the exposure gap a $1M umbrella closes for pennies on the dollar.
Homeowners Coinsurance Penalty
Insured below 80% of replacement cost? Even a partial loss gets paid out at a reduced percentage.
COBRA vs Marketplace
COBRA's full premium + 2% fee vs a subsidized ACA plan — bridge a job-loss gap for less.
🧓 Retirement & Aging
13 tools →"Will my money outlast me?"
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FIRE Calculator
Monte Carlo simulation of your path to financial independence.
FIRE Path Comparator
Lean / Regular / Fat / Coast / Barista / Geo-Arb — see 6 paths to financial freedom side by side from one set of inputs.
Retirement Withdrawal Calculator
How long will your savings last? Model withdrawals, inflation, and safe withdrawal rate.
401(k) Tax Savings Simulator
Pre-tax retirement contribution this year + the compounded retirement balance — both timescales at once. Shows the surprisingly small paycheck hit after the IRS rebates your marginal rate.
Roth vs Traditional
Apples-to-apples after-tax comparison: Roth vs Trad + side taxable. See how marginal-rate differential actually decides the winner.
Life Insurance Needs
How much coverage does your family actually need?
Social Security Claim Age
62 vs FRA vs 70 — which age maximizes lifetime present value given your longevity assumption?
Pension vs Lump Sum
Keep the guaranteed monthly pension, or take the buyout and invest it yourself? Present-value the decision.
RMD Calculator
What will the IRS force you to withdraw from your traditional accounts starting at 73, and what will it cost in tax?
Withdrawal Sequencing
Taxable, traditional, or Roth first? The draw-down order can save real tax dollars over a long retirement.
Social Security Spousal / Survivor
Up to 50% of a spouse's PIA, or up to 100% of a deceased spouse's benefit — see the early-claiming reduction on each.
Medicare IRMAA Cliff
Cross a MAGI threshold by $1 and your entire Part B/D premium jumps tiers. See where your income lands.
Reverse Mortgage vs Downsizing
Borrow against your home and stay, or sell, buy smaller, and invest the difference? Compare net worth at your horizon.
💳 Debt & Credit
12 tools →"Am I paying more than I have to?"
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Credit Card Payoff
Minimum payment vs a fixed monthly amount — see the years and thousands in interest the minimum-payment trap quietly costs.
Balance Transfer
Does the 0% intro offer beat the 3-5% transfer fee? Break-even, plus whether you clear it before the rate jumps.
Debt Consolidation
Does one loan beat your blended rate after the origination fee? Compared against the avalanche method.
Debt Payoff Strategy
Avalanche vs. Snowball vs. Minimum-Only — see which strategy saves the most interest and how it compares to investing instead.
Loan Payoff
Pay off debt faster or invest the extra?
Credit Utilization
How far to pay down before the statement closes to clear the 30% and 10% score thresholds.
Mortgage Calculator
Monthly payment, total interest, and amortization breakdown.
Mortgage Refinance
Break-even on closing costs from the lower payment — plus the lifetime-interest catch when you reset to a fresh 30-year term.
Student Loan Refinance
Interest saved from a lower rate vs the federal protections (IDR, PSLF, forbearance) you permanently give up.
Debt Settlement vs Full Payoff
The advertised settlement % skips the program fee and the tax on forgiven debt — see the real cost.
Buy Now Pay Later True Cost
A flat late fee on a 6-week Pay-in-4 plan is a high annualized rate in disguise. See the real number.
Auto Repossession Deficiency
94% of repossessions leave a balance still owed — see how much less you'd owe selling proactively.
❤️ Relationships & Money
14 tools →"Love is free. The logistics aren't."
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Fair Expense Split
50/50 vs proportional-by-income — see the burden each split puts on each partner when incomes differ.
Marriage Tax: Penalty or Bonus?
Does filing jointly raise or lower your federal tax? Equal earners are a wash; single-earner couples get a bonus.
The Second Income Trap
After childcare, commute, and the household marginal rate, what does the second paycheck actually net?
Cohabitation Savings
Two can live cheaper than one — what moving in together saves vs living apart, invested over 10 years.
Cost of Divorce
Beyond the asset split: legal fees plus the ongoing cost of running two households instead of one.
Prenup Cost-Benefit
Attorney cost vs the expected value of protecting premarital assets — an actual expected-value calculation.
Alimony Estimator
Illinois's actual guideline formula, run against your own incomes and marriage length.
Debt Merger Impact
Does your partner's debt sink a joint mortgage? The combined back-end DTI math.
Child Support Guideline
$11,700 in monthly income caps Texas child support at $2,925/month for two kids.
Engagement Ring Cost
A $5,200 ring financed at 11.86% costs $6,647 once interest and insurance are counted.
Marriage Roth IRA Cliff
Two individually Roth-eligible partners can lose $15,000/year in contribution room by marrying.
Wedding Budget
Wedding cost breakdown + opportunity cost of that budget.
Child-Raising Cost
How much does it cost to raise a child from birth to 18?
Stress Cost
How much is chronic stress actually costing you?
🎓 Education & Student Debt
14 tools →"Will the degree pay off?"
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Degree ROI
4-year tuition + 4 years foregone earnings vs the lifetime salary premium — and the year it breaks even.
IDR Repayment
PAYE/IBR cap + balance trajectory + 20/25-yr forgiveness with the tax bomb honestly priced through 2025 brackets.
PSLF Calculator
120 qualifying payments → tax-free forgiveness for public-service workers. Federal→private refi kills it — warning included.
Bootcamp vs Degree
Short cost + fast payoff vs long cost + higher ceiling. Lifetime delta and the breakeven year — assumes you land the job.
Grad School ROI
$80K + 2 years off vs the post-grad salary bump. Many master's barely pay back; top-tier programs do.
Parent PLUS vs Private Loan
9.07% + a 4.228% fee deducted from disbursement vs a private loan — the real gross-up cost gap.
529-to-Roth Rollover
Unused 529 funds into the beneficiary's Roth IRA — a multi-year project capped at $35,000 lifetime.
Student Loan Interest Deduction
Up to $2,500 deductible, phased out by MAGI — married filing separately never qualifies at all.
Teacher Loan Forgiveness
5 years teaching at a low-income school can forgive $17,500 — can't be combined with the same PSLF years.
529 Plan State Tax Deduction
New York's $10,000 deduction cap is a different number than the $38,000 gift tax limit.
Student Loan Interest Capitalization
A 12-month deferment can permanently add $714 to your loan cost.
Skill Investment ROI
Is learning this skill worth the time and money?
Certification Value
Is this certification worth getting?
Student Loan Refinance
Interest saved from a lower rate vs the federal protections (IDR, PSLF, forbearance) you permanently give up.
🧾 Tax Strategy
17 tools →"Pay the right amount, not a dollar more"
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Marginal vs Effective Tax
A $1k raise costs marginal-rate × $1k, never more — debunks the 'bracket bump' myth.
Capital Gains Harvesting
0% LTCG bracket headroom for tax-gain harvesting + 1:1 loss offsets + $3k against ordinary income.
Self-Employment Tax
The 15.3% SS+Medicare on top of income tax that hits new freelancers. SS wage-base cap + 0.9% additional Medicare.
Roth Conversion Ladder
Fill low brackets in gap years — convert traditional → Roth when now-rate < expected later-rate.
Quarterly Estimated Tax
Safe harbor: 100% (or 110%) of last year's tax, split into four. Avoid the IRS underpayment penalty.
Backdoor Roth IRA
The pro-rata rule that can tax 93%+ of a 'clean' conversion if you have an old rollover IRA sitting around.
QBI Deduction (Section 199A)
20% off pass-through business income — until the W-2 wage limit and SSTB phase-out eat into it.
Kiddie Tax
A child's unearned income above $2,700 gets taxed at the PARENT's rate, not the child's.
Net Investment Income Tax (NIIT)
The 3.8% surtax thresholds haven't moved since 2013 and aren't indexed for inflation. See where you land.
Cash Yield After Tax
Savings account, T-bill or muni: which leaves you the most after federal and state tax?
Standard vs Itemized Deduction
The 2026 SALT cap jumped to $40,400 — enough to flip many high-tax-state homeowners back to itemizing.
Charitable Bunching Strategy
Concentrate years of giving into one to clear the standard deduction bar and capture real tax savings.
Roth vs Traditional
Apples-to-apples after-tax comparison: Roth vs Trad + side taxable. See how marginal-rate differential actually decides the winner.
401(k) Tax Savings Simulator
Pre-tax retirement contribution this year + the compounded retirement balance — both timescales at once. Shows the surprisingly small paycheck hit after the IRS rebates your marginal rate.
Tax Refund Opportunity Cost
Your refund is a 0% loan to the government. See what those withholdings would have grown to if invested instead.
ISO Exercise + AMT
The phantom tax bill on ISO exercise — see your AMT, total cash needed, and break-even sale price.
Marriage Tax: Penalty or Bonus?
Does filing jointly raise or lower your federal tax? Equal earners are a wash; single-earner couples get a bonus.
🌐 Digital Spending & Subscriptions
14 tools →"The recurring charges no one reviews"
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Subscription Audit
Every recurring charge totalled — monthly, annual, and 30 years invested.
Streaming Stack vs Cable
Have you re-bundled without noticing? Compare your stack to cable benchmark.
Cloud Storage Right-Sizing
Paying for 2TB to hold 200GB? Cost per used GB across iCloud + Google + Dropbox.
Device Upgrade Cycle ROI
Phone every 2 years vs every 4 — 10-year cost gap with resale value baked in.
Subscription Inflation Tracker
Where Netflix's price lands in 5 years, and the 'real' premium above CPI.
Shared Plan Split
Split a family plan 6 ways and save $9/month per person — the breakeven headcount for any shared tier.
Annual vs Monthly Billing
A 17% annual discount can still lose to monthly billing at a high enough opportunity-cost rate.
Ad-Tier Time Cost
The cheaper ad tier isn't free — value the ad minutes at your own hourly rate to find the real breakeven.
Streaming Rotation Strategy
Subscribe only for the months you'd actually watch — a 5-service stack can save 60%+ a year.
Streaming Extra-Member Fee
Netflix and Disney+ now charge $7-10/month per extra member — is sharing still worth it?
Forgotten Subscription Cost
The average household wastes $384/year on subscriptions nobody remembers signing up for.
Buy vs. Subscribe
Compare the true cost of buying outright vs. recurring payments.
Opportunity Cost
What would this money be worth if invested instead?
Screen Time Cost
What is your screen time really costing you in lost hours?
🏛️ Estate Planning
14 tools →"What you leave, and what gets taken"
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Estate Tax Exposure
Federal + state estate tax exposure at death. 2025 exemption $13.99M individual / $27.98M MFJ.
Annual Gifting Strategy
$19K/recipient/yr × N × years sheltered before estate tax (40% top federal rate).
Step-Up Basis at Death
Sell now (LTCG) vs hold to death (heir gets stepped-up basis tax-free). When NOT to sell.
Inherited IRA 10-Year RMD
SECURE Act drawdown for non-spouse heirs — equal annual vs lump strategies compared.
QCD Strategy
From 70½, route up to $108K (2025) from IRA directly to charity. AGI-preserving.
ILIT (Life Insurance Trust)
Move a policy's death benefit outside the taxable estate. $1M policy at 40% saves $400K.
Estate Liquidity Gap
Can the estate pay the tax bill in cash within 9 months, or does it force a sale of the business?
Charitable Remainder Trust
Sell appreciated stock tax-free through a CRAT — income now, deduction today, remainder to charity.
SLAT Future Appreciation
Gifting $5M into a SLAT today can shelter $14.3M of future growth from estate tax.
GRAT Wealth Transfer
A $1M zeroed-out GRAT can pass $163K to heirs with zero gift tax.
QTIP Trust + Portability
Skipping the portability election on a QTIP trust can cost $5.2M in extra estate tax.
Life Insurance Needs
How much coverage does your family actually need?
Roth Conversion Ladder
Fill low brackets in gap years — convert traditional → Roth when now-rate < expected later-rate.
Marriage Tax: Penalty or Bonus?
Does filing jointly raise or lower your federal tax? Equal earners are a wash; single-earner couples get a bonus.
🫂 Caregiving & the Sandwich Generation
11 tools →"What caring for an aging parent actually costs — in dollars and in career"
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Elder Care Cost Comparison
In-home aide vs assisted living vs nursing home (semi/private) — 2024 Genworth/CareScout national medians, side by side.
Caregiver Opportunity Cost
Lost wages + lost 401(k) match + a permanently lower Social Security check — the real cost of quitting to caregive.
LTC Insurance Break-Even
Buy a long-term-care policy or self-fund? Compare months of care covered under each path.
Parent Dependent Tax Benefit
Can you claim a parent as a dependent? The $500 credit, the Child and Dependent Care Credit, and FSA interaction.
Sibling Care Cost Split
Equal, income-proportional, or hybrid — see who actually carries the heaviest burden under each split.
Home Modification ROI
$15K of grab bars and a stairlift vs a $5,900/month facility — the breakeven in months, not years.
Adult Day Care Cost
The option between quitting your job and a facility: daytime-only care at a fraction of full-time cost.
Family Caregiver Pay
Paying a relative for care: gift-tax exclusion vs a formal, written personal care agreement.
Medicaid Look-Back & Spend-Down
A $100K gift 3 years ago creates a 9-month Medicaid penalty most families don't see coming.
VA Aid & Attendance Benefit
A veteran's benefit that can unlock $1,720/month most families never claim.
CCRC Entrance Fee vs Rental
A $480K entrance fee can cost $1.2M more than renting the same community.
Looking for developer tools?
Formatters and validators for JSON, YAML, CSV and more, plus regex, cron, semver, and subnet testers — in Utilities.