What the 2026 Tax Changes Mean If You Live in Tennessee
Most of what’s been written about the One Big Beautiful Bill Act’s 2026 tax provisions is aimed at someone in California, New York, or New Jersey. Typically someone trying to figure out how much of their state income tax bill they can claw back on their federal return. If you live in Williamson County, that conversation barely applies to you. And that’s worth pausing on, because it changes how you should actually think about this year’s tax planning.
Here’s what’s new for 2026, and what it means specifically if Tennessee is home.
The SALT Cap Just Quadrupled — But Only Some People Benefit
For tax years 2018 through 2024, the federal deduction for state and local taxes (SALT) was capped at $10,000. The One Big Beautiful Bill Act raised that cap to $40,000 for 2025, and it increases again to $40,400 for 2026, with the cap rising 1% annually through 2029 before reverting to $10,000 in 2030. The increased cap is also subject to a phasedown once modified adjusted gross income exceeds $500,000 for 2025, rising to $505,000 for 2026, after which the threshold continues increasing by 1% each year.
On paper, that sounds like a win for everyone who itemizes. In practice, it’s almost entirely a win for people who pay a lot in state income and property tax. Which is precisely the bill people in income-tax states are stuck with every year.
Tennessee has no state income tax. Williamson County property taxes, even on a substantial home, rarely come close to the old $10,000 cap, let alone the new $40,000 one. So while a family in Illinois or New York might genuinely reclaim thousands of dollars by raising this cap, the SALT increase mostly doesn’t move the needle for someone who has lived in Franklin, Brentwood, or Nashville for years.
Here’s the part that matters more: if you’re moving to Tennessee from a high-tax state, you’re not losing access to a valuable deduction you used to rely on. Instead, you’re trading a capped, partial deduction for a 0% state income tax rate, permanently. The SALT cap increase is temporary and scheduled to disappear in 2030. Tennessee’s lack of a state income tax isn’t going anywhere. For relocators, that’s the real comparison to be making. Not how much SALT you can deduct this year, but what your total tax picture looks like over the next decade in a state with no income tax at all.
The New $6,000 Senior Deduction
Starting with the 2025 tax year and running through 2028, individuals age 65 and older can claim an additional $6,000 deduction, on top of the existing additional standard deduction for seniors, for a combined $12,000 for a married couple where both spouses qualify. This deduction is available whether you itemize or take the standard deduction, but it phases out for taxpayers with modified adjusted gross income over $75,000, or $150,000 for joint filers.
That income threshold is the detail most coverage glosses over. If you and your spouse have $160,000 or more in retirement income between Social Security, pension, and portfolio withdrawals, you may already be phased out of part or all of this deduction. This is a good year to look at whether the order you draw down accounts — Social Security, IRA withdrawals, taxable brokerage, Roth — is pushing your MAGI over that line unnecessarily.
It’s also a deduction with a deadline. Unless Congress acts again, it disappears after 2028. If you’re planning a large Roth conversion or another move that would spike your income in a given year, doing it in a year when you’re not relying on this deduction — or timing around the phaseout — is worth a real conversation rather than a guess.
The Mandatory Roth Catch-Up Rule for High Earners 50+
This one isn’t optional, and it’s already in effect. Under a SECURE 2.0 provision that took effect for 2026, if you’re 50 or older and earned $150,000 or more in Social Security wages (Box 5 of your W-2) in the prior year, your catch-up contributions to a 401(k) or similar workplace plan must now go into a Roth account instead of a traditional pre-tax account. You don’t get to choose. If your plan doesn’t offer a Roth option, you may lose the ability to make catch-up contributions at all until it does.
For 2026, the standard 401(k) contribution limit is $24,500, with a $8,000 catch-up for those 50 and older — and a larger “super catch-up” for those ages 60 to 63. If this applies to you, the practical question is whether your current paycheck withholding and plan elections already reflect the new rule, and whether the shift to Roth catch-up contributions changes how you should be allocating the rest of your contributions between pre-tax and Roth.
Why This Matters More Than Usual If You Just Moved Here
If you’ve relocated to Franklin or Brentwood in the past year or two, you’re not just adjusting to new tax forms — you’re navigating two sets of changes at once: the move itself, and a federal tax code that shifted significantly the same year you arrived. The provisions above interact with each other. A Roth conversion affects your MAGI, which affects your senior deduction eligibility, which affects whether bunching deductions makes sense this year versus next. None of these decisions should be made in isolation, and a generic national article can’t account for the fact that you’re starting from a 0% state income tax baseline that most of what you’ll read assumes you don’t have.
Frequently Asked Questions
Does the SALT deduction cap increase help Tennessee residents? Only marginally for most people. Because Tennessee has no state income tax, the SALT deduction here is generally driven by property taxes alone, which rarely approach the new $40,400 cap for 2026. The increase mainly benefits taxpayers in states with high income tax rates.
What is the new senior deduction for 2026? Taxpayers age 65 and older can claim an additional $6,000 deduction ($12,000 for a married couple where both qualify) through tax year 2028. It’s available whether you itemize or take the standard deduction, but it phases out for individuals with modified adjusted gross income above $75,000, or $150,000 for joint filers.
Do I have to put my catch-up 401(k) contributions into a Roth account now? If you’re 50 or older and earned $150,000 or more in FICA wages in the prior year, yes — as of 2026, your catch-up contributions to an employer plan must go into a Roth account under a SECURE 2.0 provision. This applies regardless of whether you’d prefer the pre-tax treatment.
Is it still worth moving to Tennessee for tax reasons given the higher SALT cap? For most people relocating from a high-income-tax state, yes. The increased SALT cap is temporary and scheduled to revert to $10,000 in 2030. Tennessee’s lack of a state income tax is a permanent structural difference, not a temporary deduction, and it compounds every year you live here.
How do these changes affect my Roth conversion strategy? Each of these provisions touches modified adjusted gross income in some way — the senior deduction phaseout, the SALT phasedown above $500,000, and ordinary bracket management all depend on it. A Roth conversion in the wrong year can reduce or eliminate other benefits you’d otherwise qualify for. This is worth modeling out before you convert, not after.
Talk Through Your 2026 Tax Picture
These provisions interact in ways that are easy to miss if you’re reading about them one at a time. If you’ve recently relocated to Williamson County, or you’re trying to figure out how the senior deduction, the SALT cap, or the new Roth catch-up rule fit into your specific situation, we’re happy to walk through it with you.
