For retirees and those nearing retirement across Montana, some of the most critical tax decisions for 2026 must be made long before it is time to prepare your actual tax return. It helps to understand the difference between tax preparation and proactive tax planning. While preparation simply reports the financial decisions you have already finalized, tax planning asks what steps you should actively take before the December 31 deadline arrives.
With several months left in 2026, those approaching or already in retirement have a valuable window to analyze how their income streams interact. In Billings and throughout our region, we emphasize looking at the big picture—how your IRA withdrawals, Roth conversions, required minimum distributions (RMDs), Social Security benefits, and the enhanced senior deduction work together to impact your overall liability.
Reviewing these five key areas before year-end can help you make practical, informed decisions aligned with your long-term goals.
A Roth conversion involves moving funds from a traditional IRA or another tax-deferred retirement account into a Roth IRA. The trade-off is clear: any pre-tax amounts you convert generally become taxable income in the year the conversion takes place. In exchange, those assets enter the Roth ecosystem, where qualified distributions are tax-free and account owners are exempt from lifetime required minimum distributions.

Because the IRS treats untaxed converted amounts as taxable income for the conversion year, managing the size and timing of your conversion is essential. Simply converting $100,000 because of the general benefits of a Roth account can backfire if that additional income pushes you into an unfavorable tax bracket. Instead, a conversion should be carefully modeled alongside your estimated 2026 income.
Key questions to analyze include:
In many cases, executing a partial conversion is a more sensible, measured approach than an all-or-nothing decision.
Under current law, required minimum distributions generally begin at age 73 for affected retirement accounts. The IRS calculates your annual RMD by taking your prior-year December 31 account balance and dividing it by an applicable life-expectancy factor. However, the most strategic time to plan for these mandatory distributions is often several years before they actually start.
Once RMDs begin, your flexibility drops, as you have less control over the amount of taxable retirement income that must appear on your annual tax return. If you are in the window between your retirement date and your RMD starting age, your taxable income may be temporarily lower. This period of lower income presents an excellent opportunity for active tax-bracket management, including:
The objective is not always to reduce this year's tax bill to the absolute minimum. Sometimes, intentionally paying tax at a known, lower rate today is the most effective way to limit your exposure to higher tax rates down the road.
Taxpayers who are 65 or older may qualify for an enhanced federal deduction. For the 2026 tax year, this deduction can be as high as $6,000 per eligible individual, or up to $12,000 on a joint return where both spouses qualify. Eligible taxpayers can claim this enhanced deduction regardless of whether they choose to itemize their deductions or claim the standard deduction.
Crucially, this benefit begins to phase out once modified adjusted gross income (MAGI) exceeds $75,000 for single filers and $150,000 for joint filers. This phase-out creates a vital planning interaction. A large, discretionary transaction—such as a substantial Roth conversion—might save taxes in one area while simultaneously reducing or eliminating your senior deduction. This does not mean you should avoid the transaction entirely, but it highlights why you must project your entire return before making a final decision.
Retirement income rarely originates from just one source. A typical household retirement portfolio might consist of several interacting components:

These distinct income sources do not exist in isolation. For example, taking a larger traditional IRA distribution increases your taxable income, which can in turn trigger taxes on your Social Security benefits, alter the value of income-tied deductions, and increase other income-sensitive costs. This is why retirement tax planning must be treated as a unified income strategy rather than a series of disconnected decisions. Before finalizing any retirement account withdrawals, look closely at everything else that will be reported on your return.
While some tax strategies can be safely handled during tax season, many critical moves must occur before the calendar year closes. A Roth conversion intended for the 2026 tax year must be fully executed within 2026. Furthermore, you cannot simply reverse a Roth conversion through recharacterization if you later decide the converted amount was too high.
Waiting until the final weeks of December also introduces significant administrative risks, as financial custodians face heavy year-end volumes and incomplete paperwork can delay processing. A far safer approach is to run a comprehensive tax projection while you still have ample time to make adjustments. An accurate year-end projection will help estimate:
Successful retirement planning is not merely about the size of the nest egg you have accumulated—it is about how efficiently you can convert those assets into after-tax retirement income. Protecting your hard-earned assets requires honest, straightforward planning that takes your unique situation into account.
If you are retired or approaching retirement in Montana or our neighboring states, let us help you review your 2026 income picture before you make any irreversible year-end distributions or conversions. Contact our Billings office today to schedule a personal tax planning consultation.
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