A plain-language look at the One Big Beautiful Bill Act for women approaching retirement
You’ve probably seen the headlines about the new tax law. Maybe a friend mentioned it, or your accountant sent a one-line note. And then you didn’t look into it further, because there’s already a lot on your plate, and most of the coverage focused on things that didn’t seem to apply to you.
You’re not behind. The provisions that get the most attention are the ones that affect the most people. The ones that affect you most specifically, someone in the years where retirement income decisions are starting to matter, are quieter, and they interact with each other in ways that aren’t obvious.
Here’s where to focus. The new tax law, the One Big Beautiful Bill Act, signed into law in July 2025, changes several retirement planning decisions for women looking at a five-to-eight-year window. One related change in this period isn’t part of that law at all (the ACA subsidy shift below), but it lands at the same time and matters just as much. Here’s each one, and why it matters.
The senior deduction is real, but it phases out faster than most people realize
Starting in 2025, anyone age 65 or older gets an additional $6,000 deduction on top of the regular standard deduction. For a married couple where both spouses are 65+, that’s $12,000 stacked on top of the $31,500 standard deduction (2025) and the existing age-65 add-on.
The catch is the phaseout. The full deduction is only available if your household income — specifically, your modified adjusted gross income, or MAGI — is below $75,000 for a single filer or $150,000 for a couple. Above those levels, it shrinks quickly, and it disappears entirely at $175,000 single or $250,000 joint.
For most of the families I work with, that phaseout matters. A retired couple drawing from a mix of Social Security, pre-tax IRAs, and a brokerage account can land in the phaseout range without realizing it, especially in years with a Roth conversion or a large capital gain. The deduction also expires at the end of 2028 unless Congress extends it.
The practical impact: it changes the math on when to convert to Roth, when to take large gains, and how to sequence withdrawals across your different account types in your first few years of retirement. A planned Roth conversion that pushes you $20,000 over the threshold can quietly cost you the full $12,000 deduction. None of those decisions happen in isolation.
The ACA subsidy cliff is back, and it matters most for early retirees
This is probably the change with the biggest impact on people retiring before age 65, and it’s getting the least attention.
One important point on what’s driving this: the cliff isn’t part of the One Big Beautiful Bill Act. It’s the expiration of the enhanced premium tax credits that were first put in place in 2021 and extended through 2025. Congress let them lapse at the end of 2025, so as of 2026 the ACA reverts to its original structure, which includes a hard cliff at 400% of the federal poverty level — roughly $62,600 for a single person, $128,600 for a family of four. One dollar over that threshold means losing the entire subsidy, which for a couple in their early sixties can mean losing $12,000 or more per year. The reversion also brings back the original rule with no cap on subsidy repayment: if you underestimate your income and take the subsidy in advance, the full excess comes back to the IRS at tax time. Two separate changes — the new tax law and this subsidy expiration — are reshaping the same planning years at once, which is part of why this stretch is harder to navigate than usual.
If you’re planning to retire before 65 and bridge to Medicare on a marketplace plan, this changes how you manage income in those bridge years. Roth conversions, capital gains, even a one-time IRA distribution — all of them need to be modeled against the cliff before you act.
Here’s a hypothetical example of how this plays out. A couple, both 61, retired earlier this year. They have around $2.4 million across their accounts, mostly in pre-tax IRAs, and they’re using an ACA marketplace plan to bridge to Medicare. Their projected income for 2026 puts them comfortably under the 400% of the poverty threshold, which means they qualify for about $14,000 in premium subsidies for the year.
She’s the one who handles their finances. She has been for years. Her husband’s longtime advisor, a generalist they’ve worked with since their early forties, suggested they convert $80,000 from her traditional IRA to a Roth. The reasoning sounded right: they’re in a low-tax window before Social Security and required minimum distributions, so why not fill up the 12% bracket while they can?
Something about it didn’t sit right with her. She couldn’t articulate exactly why, but the timing felt off, given they’d just signed up for ACA coverage. She brought the question to a fee-only advisor for a second look, and that’s where the math fell apart.
The conversion, on its own, would cost them roughly $9,600 in federal tax. A reasonable trade for the long-term benefit of moving money into a tax-free account. But it would also push their income well over the ACA cliff. Losing the full $14,000 subsidy on top of the $9,600 tax bill turns a sensible-looking conversion into a $23,600 decision — before any of the long-term Roth benefits get counted. The breakeven on that math takes years to recover.
The fix isn’t to skip Roth conversions entirely. It’s to do smaller conversions that stay under the cliff, or to wait until age 65 when Medicare replaces the marketplace plan, and the cliff stops mattering. Both options are still on the table. The mistake would have been to perform the larger conversion without first modeling the subsidy interaction. She caught it because she was paying attention. Most people in her position wouldn’t have.
This is a hypothetical example for illustration only. Individual situations will differ.
Charitable giving rules now reward timing over consistency
Two changes here matter for clients who give regularly.
First, starting in 2026, only the portion of charitable gifts above 0.5% of your AGI is deductible if you itemize. For a couple with $200,000 of AGI, the first $1,000 of giving each year is non-deductible.
Second, the law caps the value of itemized deductions for taxpayers in the 37% bracket at 35 cents per dollar. This applies to all itemized deductions — charitable gifts, SALT, and mortgage interest. For top-bracket donors, the practical effect is roughly a 2-cent-per-dollar reduction (37% down to 35%) in the after-tax value of giving.
Neither change makes giving less worthwhile. They do change the optimal way to structure it. Two strategies become more valuable:
Bunching. Combining several years of giving into one year, often through a donor-advised fund, lets you clear the 0.5% floor and itemize in the giving year, then take the standard deduction in the off years.
Qualified charitable distributions. If you’re 70½ or older, giving directly from an IRA bypasses your AGI entirely. The QCD avoids the 0.5% floor, the 35-cent cap, and reduces the income that drives Medicare premiums and the senior deduction phaseout. For families with required minimum distributions, this is often the most efficient way to give.
One Oregon-specific note: most of my clients itemize anyway because Oregon has state income tax, and the new law raised the SALT deduction cap from $10,000 to $40,000 for 2025 through 2029 (it phases out at higher incomes and reverts to $10,000 in 2030). That higher cap pulls more households into itemizing, which means the 0.5% floor matters more than the standard-versus-itemized decision. If you’re already itemizing for SALT, you want your charitable gifts to clear that floor to get any federal benefit from them. Bunching becomes more valuable, not less.
The estate tax exemption is permanent at $15 million per person
For most families, this is straightforward good news. The lifetime estate and gift tax exemption is now $15 million per person, $30 million for a married couple (using both spouses’ exemptions), and the law removes the scheduled sunset that would have reduced the exemption to roughly $7 million at the end of 2025. The amount is indexed for inflation starting in 2027.
What this means for planning: if you were considering large lifetime gifts in 2024 or 2025 specifically to lock in the higher exemption before it expired, that pressure is gone. You can plan estate transfers on your own timeline. That matters especially if you’re also helping aging parents with their own planning, or thinking about how and when to involve adult children in conversations about what eventually transfers to them.
What it does not change: state estate taxes. Several states have their own estate tax with much lower exemptions, and those rules are unaffected by the federal change. If you live in or own property in one of those states, the planning still matters.
What changes if you’re retiring in the next five to eight years
You don’t need to do anything dramatic in response to this law. You do need to revisit a few specific assumptions inside your existing plan.
If you’re planning to retire before 65 and use ACA coverage, the cliff is now the most consequential number in your bridge-year plan. Before any Roth conversion or large gain, the question is no longer just “what’s the marginal tax rate?” It’s “What does this do to my premium subsidy?” The answer to the second question often dwarfs the answer to the first.
If you’re close to 65, the new senior deduction is worth using, which means thinking about your income in the years before you trigger something that phases it out.
If you give meaningfully to charity, the rules now favor concentration over consistency. One large gift every few years, structured through a donor-advised fund or a QCD, often yields a better tax outcome than the same total spread evenly over the years.
And if you’ve been holding off on estate planning conversations because you weren’t sure what the rules would be, they’re now stable. That’s permission to move forward at the pace that works for your family.
How Thistle Wealth looks at this
The new law doesn’t change the goal: sustainable income that lasts, without the decisions compounding against you. What it does change is which decisions talk to each other.
A Roth conversion is no longer just a Roth conversion. It’s also a question about your ACA subsidy, your senior deduction eligibility, and your capital gains bracket, all in the same year. The retirement income planning work I do with clients is built around exactly that. Not any single decision in isolation, but what happens when you look at all of them together, in sequence, over the years.
Most generalist advisors won’t catch the interactions. Most online retirement calculators don’t model them. They have to be looked at on purpose, before decisions are made, by someone whose job is to review them.
If you’d like to talk through how the new law affects your specific situation, you can reach out here. Every relationship at Thistle Wealth begins with a comprehensive financial plan, and conversations like this one are exactly what that plan is built to address.
This article is for general educational purposes only and is not personalized financial, tax, legal, or investment advice. Your situation is unique and may call for different strategies than those described here. Please consult with a qualified professional who can provide guidance tailored to your specific circumstances. All investing involves risk, including potential loss of principal.
