Roth Laddering vs. No Conversions: The Nevada Retiree's Choice

The optimal Roth conversion window for most retirees is the early retirement period between stopping employment income and when both Social Security and RMDs begin, often a 5–12 year window from roughly age 60–72. During this period: employment income has stopped (taxable income is lower), Social Security has not yet begun (no provisional income adding to AGI), and RMDs have not yet started (traditional IRA balance is still entirely under your control).

For Nevada residents, this is the ideal window because: (1) income is at its lowest, making the federal tax rate on conversions as low as possible, and (2) Nevada has zero state income tax on the conversion. Conversions executed during this window at 12–22% federal rates permanently protect those dollars from potentially higher future rates and eliminate future RMDs on converted amounts.

The optimal annual conversion amount "fills up" your current tax bracket without pushing into the next, commonly called "bracket filling." For example, a married couple in the 22% bracket in 2025 has a bracket ceiling around $201,050 in taxable income. If their other income is $50,000, they could convert up to approximately $151,000 before hitting the 24% bracket.

However, the optimal conversion amount must also account for: (1) staying below IRMAA thresholds that will apply 2 years later, (2) managing provisional income to limit Social Security taxation if SS has already begun, and (3) not creating a large tax payment that strains current cash flow. The optimal amount is different every year, it requires fresh calculation each year based on that year's full income picture. A financial representative who reviews conversion amounts annually can identify the exact optimal conversion for each year's specific situation.

Rising tax rates strengthen the case for Roth conversions done today. Every dollar converted at today's 22% federal rate is permanently protected from future taxation, if rates rise to 25% or higher (whether through legislative action or expiration of Tax Cuts and Jobs Act provisions after 2025), those previously converted Roth dollars are unaffected. You locked in the lower rate permanently.

The current federal tax environment is arguably near historically low rates after the 2017 TCJA reductions. Those provisions are scheduled to sunset after 2025 unless extended, which could increase rates across most brackets. Executing Roth conversions before any such increase locks in today's known rate, an insurance policy against future legislative or fiscal policy changes. The Nevada advantage is that this insurance costs nothing at the state level, making today an exceptionally favorable time for Nevada residents to accelerate Roth conversion activity.

Yes, Roth conversions can be highly valuable beginning at 65, though the planning is more nuanced. At 65, Medicare has already begun (IRMAA must be managed carefully, conversions today affect Medicare costs in 2 years). Social Security may have already started (provisional income must be monitored). And the conversion window is shorter, only 7–8 years before RMDs begin at 73.

The key questions at 65: How large is your traditional IRA? How large will projected RMDs be at 73? If RMDs will push you above IRMAA tiers or significantly increase Social Security taxation, even a partial conversion ladder from 65 to 72, converting amounts that stay below IRMAA thresholds each year, can dramatically reduce lifetime Medicare surcharges and Social Security taxation. For Nevada residents at 65, the zero state tax advantage still applies fully, making each conversion dollar more economical than in any high-tax state.