Retirement Decumulation Math & Templates
Fifteen mathematical edge cases that break standard bank calculators—each paired with a one-click JSON configuration that runs 100% locally in your browser.
The Medicare IRMAA Cliff Trap
Why a single lump-sum IRA withdrawal triggers a two-year delayed Medicare Part B and Part D surcharge cliff.
Read Math & Load Template →Sequence of Returns Risk in the "Red Zone"
Why early bear markets permanently destroy portfolio longevity even when long-term average returns hit 7%.
Read Math & Load Template →Pre-65 ACA Premium Subsidy Management
How sequencing Roth and high-basis brokerage withdrawals preserves thousands in annual ACA tax credits.
Read Math & Load Template →The "Social Security Tax Torpedo"
How withdrawing $1,000 from a Traditional IRA can trigger a hidden 40.7% marginal federal tax rate.
Read Math & Load Template →Financial Privacy and Cloud Security Paranoia
Full-precision multi-account decumulation math executed 100% locally in browser memory with zero network egress.
Read Math & Load Template →The Age 73/75 RMD "Tax Bomb"
How deferring pre-tax 401(k) withdrawals until age 75 creates forced six-figure distributions and bracket spikes.
Read Math & Load Template →Executing a Three-Bucket Cash Flow Strategy
How isolating 2–5 years of cash and short bonds prevents forced equity liquidation during bear markets.
Read Math & Load Template →The "Widow's Penalty" Tax Bracket Shift
Why losing one spouse cuts federal tax brackets and IRMAA thresholds in half while RMDs stay nearly unchanged.
Read Math & Load Template →Dynamic Spending Guardrails (Guyton-Klinger)
How bounding withdrawals between dynamic floor and ceiling guardrails lifts safe initial spending above 5%.
Read Math & Load Template →The "Retirement Spending Smile"
Why real retirement spending drops during the middle Slow-Go years before rising again for late-life care.
Read Math & Load Template →Stagflation and Sequence of Inflation Risk
How high inflation paired with flat nominal returns creates a compounding pincer on real purchasing power.
Read Math & Load Template →Optimal Asset Location & Drawdown Sequencing
Why proportional bracket-filling across Taxable, Traditional, and Roth accounts adds years of portfolio life.
Read Math & Load Template →Asymmetric Healthcare Inflation
Why healthcare inflating at 6% while general CPI runs at 2.5% silently reshapes late-retirement budgets.
Read Math & Load Template →Legacy Planning and Step-Up in Basis Optimization
Why leaving $1.2M in a low-basis brokerage account delivers $420,000 more to heirs than a $1.2M Traditional IRA.
Read Math & Load Template →Capital Gains vs. Ordinary Income Harvesting
How stacking long-term capital gains above the standard deduction unlocks up to $98,900 in 0% federal tax income.
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