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What Is a Marginal Tax Rate? (2026)
What is marginal tax rate? The rate on your last dollar of income. See 2026 federal brackets, marginal vs. effective, and how to find yours.
Converting a Traditional IRA to a Roth IRA: How the Tax Works
How to convert a traditional IRA to a Roth IRA without paying taxes in 2026: the pro-rata rule, backdoor and bracket-filling strategies, with IRS-sourced math.
How to Avoid Taxes on a 401(k) Withdrawal (2026)
How to avoid taxes on 401k withdrawal in 2026: bracket timing, Roth conversions, NUA, QCDs, and IRMAA/Social Security cliffs, with IRS sources.
Medicare Enrollment and Late-Enrollment Penalties (2026)
A 2026 research briefing on Medicare enrollment periods and late-enrollment penalties, with the Part A, B, and D formulas, worked examples, and primary CMS and Medicare.gov figures.
Qualified Charitable Distributions (QCD) in 2026: Limits, Rules, and the RMD Offset
The 2026 qualified charitable distribution limit is $111,000 per person (IRS Notice 2025-67). A research briefing on QCD rules, the RMD offset, and split-interest limits.
The 4% Rule and Taxes: Safe Withdrawal Rates in Retirement
A cited research briefing on safe withdrawal rates from Bengen (1994), the Trinity Study (1998), and Morningstar (2021-2026), and why every published rate is gross of tax.
Long-Term Care Costs and Taxes (2026)
2026 long-term care data: CareScout median costs by setting, what Medicare and Medicaid cover, IRS age-based premium deduction caps, and the $430/day per-diem limit.
The Retirement Tax Torpedoes: A Map of Hidden Marginal-Rate Cliffs (2026)
A 2026 reference catalog of six retirement marginal-rate cliffs: the Social Security tax torpedo, IRMAA, NIIT, LTCG breakpoints, and the OBBBA senior deduction phaseout, with sourced figures.
Roth Conversion Statistics and Trends (2026)
A 2026 research briefing on Roth conversion statistics: IRS data showing 869,400 taxpayers converted $64.8B in 2010, ICI conversion and ownership trends, and Roth IRA asset growth.
IRA and 401(k) Contribution Limits for 2026 (and the History)
2026 IRS retirement limits: 401(k) $24,500 and IRA $7,500, plus the Roth IRA income limits 2026 by filing status, MAGI rules, and what to do if you are over the limit. Educational, sourced to IRS Notice 2025-67.