Why You Should Consider Cost Segregation Studies

By Andrew Sullivan · June 4, 2025 · 40 min read

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 Municipal Bond Investing.

The sequence of returns risk is most dangerous in the first 7 years of retirement. Maintaining a 3-year bond ladder that covers basic expenses eliminates 94% of the historical sequence risk scenarios. For more on this topic, see Social Security Optimization.

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 529 Education Savings.

Social Security optimization for couples involves coordinating claiming strategies. The higher earner delaying to age 70 while the lower earner claims at 62 maximizes the household lifetime benefit in 73% of longevity scenarios. For more on this topic, see Career Optimization.

Charitable giving through donor-advised funds provides an immediate tax deduction while allowing strategic grant distribution over multiple years. Contributing appreciated securities eliminates capital gains tax on the donated amount. For more on this topic, see Sequence of Returns Risk.

Passive income through dividend stocks, real estate investment trusts, and online businesses typically requires 7 to 12 years of concentrated effort before generating sufficient cash flow to replace employment income.

The sequence of returns risk is most dangerous in the first 7 years of retirement. Maintaining a 3-year bond ladder that covers basic expenses eliminates 94% of the historical sequence risk scenarios.

Charitable giving through donor-advised funds provides an immediate tax deduction while allowing strategic grant distribution over multiple years. Contributing appreciated securities eliminates capital gains tax on the donated amount.

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.

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.

Emergency funds should be structured in three tiers: one month in checking, two months in high-yield savings, and three months in a conservative balanced fund. This structure optimizes liquidity while generating modest returns.

Social Security optimization for couples involves coordinating claiming strategies. The higher earner delaying to age 70 while the lower earner claims at 62 maximizes the household lifetime benefit in 73% of longevity scenarios.

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.

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.

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.

Emergency funds should be structured in three tiers: one month in checking, two months in high-yield savings, and three months in a conservative balanced fund. This structure optimizes liquidity while generating modest returns.

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.

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.

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.

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)

WealthBuilder99Aug 13, 2026
I have been doing this for 3 years now and can confirm these numbers are pretty close to what I have experienced.
FI_Seeker2024Jun 19, 2026
This is a bit misleading. The tax implications are much more complex than what is described here, especially for high earners.
GeoArbitrageGalJan 1, 2026
I respectfully disagree with point number three. The data from Vanguard research actually shows the opposite conclusion.
WealthBuilder99Nov 22, 2025
Can you do a follow-up article about how this applies to people with variable income? Like freelancers and consultants?
MustachianMomOct 25, 2025
My financial advisor recommended the exact same approach. Nice to see it validated with actual numbers.
DividendDaveFeb 9, 2026
This is a bit misleading. The tax implications are much more complex than what is described here, especially for high earners.
OptimizeEverythingJun 12, 2026
Can you do a follow-up article about how this applies to people with variable income? Like freelancers and consultants?
DividendDaveSep 24, 2025
My financial advisor recommended the exact same approach. Nice to see it validated with actual numbers.
DebtFreeJenJan 28, 2026
I respectfully disagree with point number three. The data from Vanguard research actually shows the opposite conclusion.
FI_Seeker2024Feb 15, 2026
I have been doing this for 3 years now and can confirm these numbers are pretty close to what I have experienced.
IndexFundFanMay 4, 2026
I respectfully disagree with point number three. The data from Vanguard research actually shows the opposite conclusion.
PassiveIncomeProDec 6, 2025
The math checks out but I think you are being a bit conservative with the return assumptions. Historical averages suggest higher.