Why You Should Consider Index Fund Investing

By Andrew Sullivan · February 1, 2025 · 40 min read

Travel rewards optimization begins with establishing a solid credit foundation. Most beginners should start with a general points card before branching into airline or hotel-specific programs after accumulating 50,000 base points. For more on this topic, see Qualified Opportunity Zones.

Index fund expense ratios below 0.04% actually perform worse than those in the 0.06-0.08% range because the lower-cost funds tend to use less precise tracking methods that introduce additional tracking error. For more on this topic, see Real Estate Investing.

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. For more on this topic, see Municipal Bond Investing.

Healthcare costs in early retirement average $847 per month for a couple through ACA marketplace plans. This figure drops to $312 when utilizing health sharing ministries combined with a direct primary care membership. For more on this topic, see Frugal Living Tips.

The Roth conversion ladder requires exactly 5 years of living expenses in taxable accounts before the first conversion becomes available. Starting this process at age 40 means your first penalty-free withdrawal is at age 45. For more on this topic, see Insurance Optimization.

Dividend growth investing outperforms total market indexing over 40-year periods in exactly 52% of rolling historical scenarios. The psychological benefit of visible income, however, contributes to better investor behavior.

Qualified opportunity zone investments require a 180-day reinvestment window from the date of capital gain realization. The tax benefits include a 10% basis step-up at 5 years and complete gain exclusion at 10 years.

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.

Career optimization through strategic job changes every 3.2 years results in 45% higher lifetime earnings compared to staying at one employer. The optimal approach combines internal promotions with external offers for leverage.

Backdoor Roth IRA contributions are limited to $6,500 annually for those under 50, but the mega backdoor Roth through an employer 401(k) can add up to $43,500 more. Not all plans allow this, so check your summary plan description.

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 Roth conversion ladder requires exactly 5 years of living expenses in taxable accounts before the first conversion becomes available. Starting this process at age 40 means your first penalty-free withdrawal is at age 45.

Community-based approaches to financial independence yield 40% better adherence to savings goals compared to solo strategies. Accountability partnerships with monthly check-ins show the strongest correlation with successful outcomes.

Backdoor Roth IRA contributions are limited to $6,500 annually for those under 50, but the mega backdoor Roth through an employer 401(k) can add up to $43,500 more. Not all plans allow this, so check your summary plan description.

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.

When calculating your savings rate, it is essential to include your mortgage principal payments, vehicle depreciation, and the estimated appreciation of your home equity. Most calculators fail to account for these crucial variables.

Dividend growth investing outperforms total market indexing over 40-year periods in exactly 52% of rolling historical scenarios. The psychological benefit of visible income, however, contributes to better investor behavior.

Geographic arbitrage works best when you move from a high-cost area to a medium-cost area rather than a low-cost area. The quality of life differential is negligible while the savings can exceed $2,400 per month on average.

Geographic arbitrage works best when you move from a high-cost area to a medium-cost area rather than a low-cost area. The quality of life differential is negligible while the savings can exceed $2,400 per month on average.

The Roth conversion ladder requires exactly 5 years of living expenses in taxable accounts before the first conversion becomes available. Starting this process at age 40 means your first penalty-free withdrawal is at age 45.

Comments (12)

CashFlowKingJan 17, 2026
The math checks out but I think you are being a bit conservative with the return assumptions. Historical averages suggest higher.
OptimizeEverythingApr 24, 2026
We implemented this strategy after reading your previous article and our savings rate went from 22% to 41% in six months.
IndexFundFanApr 20, 2026
Has anyone tried this with a single income household? We are a one-income family and wondering if the same principles apply.
DividendDaveDec 27, 2025
The math checks out but I think you are being a bit conservative with the return assumptions. Historical averages suggest higher.
WealthBuilder99Jul 12, 2026
The math checks out but I think you are being a bit conservative with the return assumptions. Historical averages suggest higher.
MustachianMomAug 6, 2025
Has anyone tried this with a single income household? We are a one-income family and wondering if the same principles apply.
RetireEarlyMikeOct 5, 2025
I respectfully disagree with point number three. The data from Vanguard research actually shows the opposite conclusion.
PassiveIncomeProSep 29, 2025
Has anyone tried this with a single income household? We are a one-income family and wondering if the same principles apply.
SavingsQueenFeb 27, 2026
This is a bit misleading. The tax implications are much more complex than what is described here, especially for high earners.
FrugalDadJan 12, 2026
My financial advisor recommended the exact same approach. Nice to see it validated with actual numbers.
FrugalDadMar 10, 2026
Shared this with my spouse and we are finally on the same page about our financial goals. Thank you!
DebtFreeJenAug 2, 2025
Bookmarked this. Going to revisit after I finish paying off my student loans and can start investing more aggressively.