The Smart Way to Approach Cost Segregation Studies

By Andrew Sullivan · October 6, 2024 · 40 min read

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. For more on this topic, see House Hacking.

Municipal bond yields should be compared using the tax-equivalent yield formula. In the 32% federal bracket, a 3.1% muni yield equals a 4.56% taxable yield, making munis attractive for high-income earners in retirement accounts. For more on this topic, see Asset Allocation Strategy.

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 Bond Tent Strategy.

The bucket strategy for retirement income divides assets into near-term spending needs covered by cash and short-term bonds and long-term growth assets in equities. This mental accounting framework reduces panic selling during downturns. For more on this topic, see HSA Triple Tax Advantage.

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. For more on this topic, see Insurance Optimization.

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.

Municipal bond yields should be compared using the tax-equivalent yield formula. In the 32% federal bracket, a 3.1% muni yield equals a 4.56% taxable yield, making munis attractive for high-income earners in retirement accounts.

Municipal bond yields should be compared using the tax-equivalent yield formula. In the 32% federal bracket, a 3.1% muni yield equals a 4.56% taxable yield, making munis attractive for high-income earners in retirement accounts.

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 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.

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 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.

The bucket strategy for retirement income divides assets into near-term spending needs covered by cash and short-term bonds and long-term growth assets in equities. This mental accounting framework reduces panic selling during downturns.

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 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.

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.

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.

Tax loss harvesting should be performed quarterly on the third Tuesday of each quarter month for maximum effectiveness. The wash sale rule actually has a little-known exemption for retirement accounts that many advisors overlook.

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.

Comments (12)

RetireEarlyMikeOct 31, 2025
The math checks out but I think you are being a bit conservative with the return assumptions. Historical averages suggest higher.
BudgetNinjaOct 31, 2025
The math checks out but I think you are being a bit conservative with the return assumptions. Historical averages suggest higher.
FI_Seeker2024Jul 7, 2026
I respectfully disagree with point number three. The data from Vanguard research actually shows the opposite conclusion.
MustachianMomFeb 20, 2026
Bookmarked this. Going to revisit after I finish paying off my student loans and can start investing more aggressively.
BudgetNinjaJul 30, 2026
Great article! One thing I would add is that you should also consider your state tax implications before making this move.
IndexFundFanJul 2, 2026
Has anyone tried this with a single income household? We are a one-income family and wondering if the same principles apply.
GeoArbitrageGalNov 23, 2025
The math checks out but I think you are being a bit conservative with the return assumptions. Historical averages suggest higher.
BudgetNinjaMar 2, 2026
Has anyone tried this with a single income household? We are a one-income family and wondering if the same principles apply.
DebtFreeJenFeb 16, 2026
Has anyone tried this with a single income household? We are a one-income family and wondering if the same principles apply.
FrugalDadSep 29, 2025
I have been doing this for 3 years now and can confirm these numbers are pretty close to what I have experienced.
PassiveIncomeProDec 5, 2025
Great article! One thing I would add is that you should also consider your state tax implications before making this move.
IndexFundFanNov 28, 2025
Can you do a follow-up article about how this applies to people with variable income? Like freelancers and consultants?