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SKILL.md
Personal Finance Mastery
Complete personal finance system covering budgeting, debt elimination, investing, tax optimization, insurance, estate planning, and financial independence. Works for any income level, any country.
Quick Financial Health Check
Run /finance-check to score current financial health:
Ignore daily market news — check portfolio quarterly at most
Tax-loss harvest in taxable accounts — offset gains with losses
Never panic sell — downturns are buying opportunities
Compound Growth Reference
$500/month invested at 7% average return:
Years
Contributed
Portfolio Value
Growth
5
$30,000
$35,800
$5,800
10
$60,000
$86,500
$26,500
20
$120,000
$260,500
$140,500
30
$180,000
$607,000
$427,000
40
$240,000
$1,320,000
$1,080,000
The message: Start early. Time is the biggest factor.
Phase 6: Tax Optimization
Tax-Advantaged Account Summary
Account
Contribution Limit (2024)
Tax Treatment
Best For
Traditional 401(k)
$23,000 ($30,500 50+)
Pre-tax in, taxed out
High earners now
Roth 401(k)
$23,000 ($30,500 50+)
After-tax in, tax-free out
Expect higher tax later
Traditional IRA
$7,000 ($8,000 50+)
Pre-tax in, taxed out
No employer plan
Roth IRA
$7,000 ($8,000 50+)
After-tax in, tax-free out
Under income limits
HSA
$4,150/$8,300
Pre-tax in, tax-free out
Triple tax advantage
529 Plan
Varies by state
After-tax in, tax-free for education
Kids' college
Mega Backdoor Roth
Up to $69,000 total
After-tax → Roth conversion
High earners
Tax Reduction Strategies
For employees:
Max 401(k) contributions — reduces taxable income
Use FSA/HSA for medical expenses
Itemize deductions if > standard deduction ($14,600 single / $29,200 married, 2024)
Charitable donations — donor-advised fund for bunching
State/local tax (SALT) deduction — up to $10,000
For self-employed:
SEP IRA or Solo 401(k) — up to $69,000/year
Qualified Business Income deduction — 20% of QBI
Home office deduction — dedicated space required
Business expenses — equipment, software, travel, meals (50%)
Health insurance premium deduction
Retirement plan contributions
Vehicle expenses — mileage or actual costs
For investors:
Hold investments > 1 year — long-term capital gains rate (0/15/20% vs ordinary income)
Tax-loss harvesting — sell losers to offset gains
Asset location — bonds in tax-advantaged, stocks in taxable
Qualified dividends — taxed at capital gains rate
Roth conversion ladder — convert in low-income years
Donate appreciated stock — avoid capital gains + get deduction
Opportunity Zones — defer and reduce capital gains
Tax Planning Calendar
Month
Action
January
Gather W-2s, 1099s, receipts
February
Estimate tax liability
March
File or extend (April 15 deadline)
April
Q1 estimated tax payment (if self-employed)
June
Q2 estimated tax payment
September
Q3 estimated tax payment
October
Extended filing deadline
November
Tax-loss harvesting review
December
Max retirement contributions, charitable donations, Roth conversions
January
Q4 estimated tax payment
Phase 7: Insurance & Protection
Essential Coverage Checklist
Insurance
Need Level
Notes
Health insurance
Critical
ACA marketplace if no employer plan
Auto insurance
Critical (if driving)
Liability + collision/comprehensive
Renters/homeowners
Critical
Covers belongings + liability
Life insurance
Critical (if dependents)
Term life = 10-12x annual income
Disability insurance
Important
60-70% income replacement
Umbrella liability
Important (high net worth)
$1M+ coverage, cheap
Long-term care
Consider (age 50+)
Protect retirement assets
Life Insurance Decision Tree
Do you have dependents who rely on your income?
├── YES → Buy term life insurance
│ ├── Coverage: 10-12x annual income
│ ├── Term: until youngest child is 25 or mortgage is paid
│ └── Type: TERM (not whole life — invest the difference)
└── NO → Skip for now, reassess when situation changes
Rule: Never buy whole life insurance as an investment. Buy term, invest the difference.
Insurance Optimization
Bundle policies — same insurer for home + auto = 10-25% discount
Shop annually — rates vary wildly between insurers
Review coverage yearly — life changes mean coverage changes
Don't over-insure — match coverage to actual risk and assets
Phase 8: Major Purchase Planning
Home Buying Readiness
Factor
Ready
Not Ready
Emergency fund
3-6 months AFTER down payment
Drained by purchase
Down payment
20% (avoids PMI)
< 10%
Debt-to-income
< 36% with mortgage
> 43%
Credit score
740+ (best rates)
< 680
Job stability
2+ years steady income
Recent job change
Plan to stay
5+ years
< 3 years (rent instead)
Monthly cost
< 28% of gross income
> 35%
Rent vs Buy Decision
Monthly cost comparison:
Renting: rent + renters insurance
Buying: mortgage + property tax + insurance + HOA + maintenance (1-3% of value/year) + opportunity cost of down payment
Buy if: staying 5+ years AND total ownership cost < rent AND you want the stability.
Rent if: < 5 years OR high mobility OR local market is overpriced (price-to-rent > 20x).
Car Buying Rules
Total vehicle cost < 35% of annual income (purchase price)
Buy used (2-4 years old) — avoid 30-40% depreciation
Pay cash if possible — if financing, keep loan < 48 months
Total transportation < 15% of take-home (payment + insurance + fuel + maintenance)
Never lease unless business write-off justifies it
Phase 9: Financial Independence (FI)
FI Number Calculation
FI Number = Annual Expenses × 25
Based on the 4% rule (Trinity Study — 4% withdrawal rate has historically survived 30-year retirements).
Annual Expenses
FI Number
Monthly Savings Needed (25 years at 7%)
$30,000
$750,000
$940/month
$50,000
$1,250,000
$1,567/month
$75,000
$1,875,000
$2,350/month
$100,000
$2,500,000
$3,134/month
FI Stages
Stage
Description
What Changes
Coast FI
Enough invested that compound growth alone will fund retirement by 65
Can take lower-paying fulfilling work
Barista FI
Investments cover most expenses, need small income
Part-time work for insurance/extras
Lean FI
25x minimal expenses saved
Can stop working, frugal lifestyle
FI
25x comfortable expenses saved
Full financial independence
Fat FI
25x generous expenses saved
Independence with luxury
FI Tracking Dashboard
fi_tracker:
date: "YYYY-MM-DD"
annual_expenses: 0
fi_number: 0 # expenses × 25
current_invested: 0
fi_percentage: 0 # invested / fi_number × 100
monthly_savings: 0
savings_rate: 0
years_to_fi: 0 # calculated from savings rate
coast_fi_number: 0 # what you need now to coast to 65
coast_fi_reached: false
Savings Rate → Years to FI
Savings Rate
Years to FI
10%
51 years
20%
37 years
30%
28 years
40%
22 years
50%
17 years
60%
12.5 years
70%
8.5 years
80%
5.5 years
The lever: Cutting expenses is 2x as powerful as earning more (reduces FI number AND increases savings).
Safe Withdrawal Strategies
Strategy
Rate
Best For
Fixed 4%
4% of initial portfolio, adjusted for inflation
Simple, traditional
Variable %
3-5% based on market conditions
Adapts to market
Guardrails
4% base, increase/decrease if portfolio deviates 20%
