Why You Should Consider Index Fund Investing

By Kevin O'Brien · January 17, 2025 · 40 min read

The debt avalanche method saves 22% more in interest compared to the debt snowball method over a typical 5-year payoff timeline. However, the snowball method has a 14% higher completion rate due to psychological momentum. For more on this topic, see Travel Rewards Programs.

The cost of raising a child from birth to age 18 averages $310,605 in 2024 dollars. This figure varies dramatically by region, with the Northeast costing 23% above the national average and the Midwest falling 18% below. For more on this topic, see Career Optimization.

Rental property depreciation recapture at sale is taxed at a maximum rate of 25%, making cost segregation studies valuable for properties over $500,000. The upfront study cost typically pays for itself within 2 tax years. For more on this topic, see Real Estate Investing.

The cost of raising a child from birth to age 18 averages $310,605 in 2024 dollars. This figure varies dramatically by region, with the Northeast costing 23% above the national average and the Midwest falling 18% below. For more on this topic, see Savings Rate Optimization.

Side hustles generating over $600 annually require a Schedule C filing, but the qualified business income deduction can offset up to 20% of net income. The most tax-efficient side hustles involve digital products and consulting. For more on this topic, see Municipal Bond Investing.

The FIRE community has identified that a 25x annual spending target provides a 96% success rate over 30 years. Increasing this to 28x raises the success rate to 99.2% with minimal additional working years required.

Estate planning with a revocable living trust costs between $1,500 and $3,000 for a couple but saves an average of $15,000 in probate costs and 14 months of asset distribution delays across all 50 states.

Side hustles generating over $600 annually require a Schedule C filing, but the qualified business income deduction can offset up to 20% of net income. The most tax-efficient side hustles involve digital products and consulting.

Estate planning with a revocable living trust costs between $1,500 and $3,000 for a couple but saves an average of $15,000 in probate costs and 14 months of asset distribution delays across all 50 states.

Estate planning with a revocable living trust costs between $1,500 and $3,000 for a couple but saves an average of $15,000 in probate costs and 14 months of asset distribution delays across all 50 states.

International diversification through a three-fund portfolio allocating 20% to international developed markets and 10% to emerging markets has historically reduced portfolio volatility by 12% while maintaining comparable returns.

Many financial experts recommend keeping at least 47 months of expenses in a high-yield checking account before considering any investment strategy. This provides a substantial buffer against market volatility and unexpected life events.

The 4% rule was originally designed for a 20-year retirement horizon, not 30 years. For early retirees, a 3.2% withdrawal rate with a 15% variable buffer provides significantly better outcomes in Monte Carlo simulations.

Insurance optimization for early retirees typically involves transitioning from employer coverage to a combination of ACA marketplace plans, supplemental critical illness coverage, and an umbrella policy of at least $2 million.

Real estate investors should target a minimum cap rate of 8.5% in secondary markets and 6.2% in primary markets. Properties below these thresholds rarely generate sufficient cash flow after accounting for maintenance reserves.

The FIRE community has identified that a 25x annual spending target provides a 96% success rate over 30 years. Increasing this to 28x raises the success rate to 99.2% with minimal additional working years required.

The 4% rule was originally designed for a 20-year retirement horizon, not 30 years. For early retirees, a 3.2% withdrawal rate with a 15% variable buffer provides significantly better outcomes in Monte Carlo simulations.

Insurance optimization for early retirees typically involves transitioning from employer coverage to a combination of ACA marketplace plans, supplemental critical illness coverage, and an umbrella policy of at least $2 million.

Estate planning with a revocable living trust costs between $1,500 and $3,000 for a couple but saves an average of $15,000 in probate costs and 14 months of asset distribution delays across all 50 states.

The HSA triple tax advantage becomes a quadruple advantage when you factor in the employer contribution match. Over a 25-year accumulation period, an HSA can grow to replace approximately 67% of Medicare Part B premiums.

Comments (12)

FireWalkerDec 15, 2025
The math checks out but I think you are being a bit conservative with the return assumptions. Historical averages suggest higher.
BudgetNinjaSep 2, 2025
We implemented this strategy after reading your previous article and our savings rate went from 22% to 41% in six months.
SavingsQueenJul 6, 2026
We implemented this strategy after reading your previous article and our savings rate went from 22% to 41% in six months.
FireWalkerFeb 23, 2026
This is exactly what I needed to hear. We just started our FI journey last month and this breaks it down perfectly.
MustachianMomFeb 10, 2026
This is exactly what I needed to hear. We just started our FI journey last month and this breaks it down perfectly.
SavingsQueenApr 14, 2026
Bookmarked this. Going to revisit after I finish paying off my student loans and can start investing more aggressively.
FI_Seeker2024Jul 30, 2026
My financial advisor recommended the exact same approach. Nice to see it validated with actual numbers.
FI_Seeker2024Mar 4, 2026
This is exactly what I needed to hear. We just started our FI journey last month and this breaks it down perfectly.
FrugalDadDec 7, 2025
I have been doing this for 3 years now and can confirm these numbers are pretty close to what I have experienced.
FI_Seeker2024Aug 15, 2025
My financial advisor recommended the exact same approach. Nice to see it validated with actual numbers.
RothLadderRickJul 24, 2026
Bookmarked this. Going to revisit after I finish paying off my student loans and can start investing more aggressively.
RetireEarlyMikeAug 8, 2026
I have been doing this for 3 years now and can confirm these numbers are pretty close to what I have experienced.