Key Takeaways
- The 2026 Social Security tax cliff could push thousands of retirees into higher tax brackets due to expiring provisions of the 2017 Tax Cuts and Jobs Act.
- Your 2026 COLA raise may actually increase your tax bill, resulting in less net income despite a higher gross benefit.
- Strategic Roth conversions, income timing, and withdrawal sequencing done in 2025 can significantly reduce your 2026 and 2027 tax exposure.
- Every retiree should run a "tax projection" scenario now to understand exactly where they stand before the cliff takes effect.
The 2026 Social Security Tax Cliff Is Real — And Most Retirees Haven’t Prepared
Here’s something I’ve been telling every client who walks through my door this year: if you’re collecting Social Security, your tax bill is very likely going up in 2026, and the raise you got from your cost-of-living adjustment probably won’t cover it.
Unless Congress acts — and as of June 2025, there’s no signed legislation preventing it — several key provisions of the 2017 Tax Cuts and Jobs Act (TCJA) are set to expire on December 31, 2025. When that happens, tax brackets revert to their pre-2018 levels, adjusted for inflation. For millions of Social Security retirees, this creates what I call a “tax cliff”: a sudden, measurable jump in federal income tax on benefits you’re already receiving.
In my 18 years as a Certified Financial Planner, I’ve rarely seen a situation where so many retirees are exposed to a tax increase they didn’t see coming. The good news? There are concrete steps you can take right now — in 2025 — to soften the blow. Let me walk you through them.
Why 2026 Is a Tax Turning Point for Social Security Retirees
The TCJA Expiration, Explained Simply
The Tax Cuts and Jobs Act, signed in December 2017, lowered federal income tax rates across the board. For example, the 22% bracket replaced what had been a 25% bracket, and the 12% bracket replaced 15%. These changes were designed to sunset after 2025.
If they expire as scheduled, here’s what changes for a married couple filing jointly in 2026 versus 2025:
| 2025 Tax Rate (TCJA) | 2026 Tax Rate (Post-TCJA) | Approximate Income Range (MFJ, Estimated) |
|---|---|---|
| 10% | 10% | Up to ~$23,000 |
| 12% | 15% | ~$23,001 – $94,000 |
| 22% | 25% | ~$94,001 – $201,000 |
| 24% | 28% | ~$201,001 – $384,000 |
| 32% | 33% | ~$384,001 – $487,000 |
| 35% | 35% | ~$487,001 – $600,000 |
| 37% | 39.6% | Over ~$600,000 |
Note: 2026 brackets will be adjusted for inflation by the IRS, so exact thresholds will shift slightly. These are projections based on pre-TCJA structure.
For a typical retired couple with $65,000 in combined income — Social Security plus a modest pension or IRA withdrawals — that jump from 12% to 15% represents a meaningful hit. And it gets worse when you factor in how Social Security benefits themselves are taxed.
How the COLA “Raise” Backfires
The Social Security Administration announced a 2.5% cost-of-living adjustment for 2025. Early estimates for the 2026 COLA range from 2.0% to 2.8%, depending on inflation data through Q3 2025. On paper, that’s more money in your check. In practice, that slightly higher benefit amount can push your “combined income” — the formula the IRS uses to determine how much of your Social Security is taxable — over a critical threshold.
“The taxation thresholds for Social Security benefits — $25,000 for singles and $32,000 for married couples — haven’t been adjusted for inflation since 1993. Every COLA raise pushes more retirees above those lines, and the 2026 bracket changes will compound the damage.” — Margaret Chen, CFP®
What I see most often is retirees who were just below the 50% taxation threshold suddenly finding that 85% of their Social Security is taxable — and at a higher rate. That’s a double hit. For a detailed breakdown of how this math works, see Social Security COLA Hidden Tax 2026: The Math Retirees Must Know.
5 Steps to Protect Your Social Security Income Before the 2026 Tax Cliff
I designed this action plan for the clients I work with every day — retirees and near-retirees who have moderate savings, rely partially or fully on Social Security, and want to keep more of what they’ve earned. Let’s get into it.
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Step 1: Run a “Tax Projection” for 2026 Right Now
Before you make any moves, you need to know where you stand. Pull together three numbers: your estimated 2026 Social Security benefit (check your my Social Security account for current figures and add an estimated 2–2.5% COLA), your expected retirement account withdrawals (IRA, 401(k), pension), and any other income (part-time work, rental income, interest, dividends).
Now calculate your “combined income” using the IRS formula: Adjusted Gross Income + nontaxable interest + 50% of Social Security benefits. If that number exceeds $25,000 (single) or $32,000 (married filing jointly), up to 50% of your benefits become taxable. Above $34,000 (single) or $44,000 (married), up to 85% is taxable.
I often tell my clients: “You can’t dodge what you can’t see.” A $400/month IRA withdrawal that seemed harmless in 2024 might be the exact amount that tips you into a higher taxation bracket in 2026 — especially with reverted tax rates. Free tools at Investopedia can help you model scenarios, or work with a tax professional to run the numbers.
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Step 2: Accelerate Roth Conversions in 2025
This is the single most powerful move available to retirees right now, and there’s a ticking clock. In 2025, you’re still in the lower TCJA brackets. Converting traditional IRA funds to a Roth IRA means you pay taxes on the converted amount this year at the lower rate — and then those funds grow and are withdrawn tax-free in 2026 and beyond.
Here’s a concrete example. Say you’re a married couple in the 12% bracket in 2025 with $30,000 of “room” before you hit the 22% bracket. You could convert $30,000 from your traditional IRA to a Roth, pay roughly $3,600 in federal tax now, and permanently remove that $30,000 from future taxable income. In 2026, that same conversion would cost you $4,500 at the 15% rate — or $7,500 at 25% if it pushed you into the next bracket.
Important: Roth conversions add to your taxable income in the year you do them. Don’t convert so much that you trigger higher Medicare premiums (IRMAA) or push more of your Social Security into the 85% taxable zone this year. This is where professional guidance pays for itself many times over.
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Step 3: Restructure Your Withdrawal Sequence
Most retirees I meet follow a simple pattern: spend Social Security first, then pull from the IRA when they need more. That’s often the worst possible sequence after 2025.
Instead, consider what planners call “tax-bracket management.” In years when your income is low — maybe you’ve delayed Social Security to age 70, or you have a gap year — pull more from taxable accounts. In years when Social Security and RMDs push you higher, draw from Roth accounts (which don’t count as taxable income) to avoid crossing thresholds.
The key insight: every dollar of Roth withdrawal is invisible to the IRS formula that determines how much of your Social Security gets taxed. A married couple pulling $20,000 from a Roth instead of a traditional IRA could keep their combined income below the $44,000 threshold — potentially saving $3,000 to $5,000 in federal taxes annually.
If you’re concerned about drawing down savings too quickly, you’re not alone. A recent survey found that rising costs are forcing many retirees to accelerate withdrawals. Why More Seniors Are Tapping Retirement Savings Too Soon explores this trend in depth.
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Step 4: Review Your Medicare Premium Exposure
Here’s the part people forget: Medicare Part B premiums are deducted directly from your Social Security check, and they’re tied to your income from two years prior. The standard Part B premium for 2025 is $185/month. If your 2026 income jumps — whether from the tax cliff, a large Roth conversion, or an unexpected capital gain — you could trigger Income-Related Monthly Adjustment Amounts (IRMAA) surcharges in 2028.
For 2025, IRMAA kicks in for individuals with modified adjusted gross income above $106,000 and married couples above $212,000. The surcharges range from an extra $74/month to $419/month per person on top of standard premiums.
I’ve watched clients lose hundreds of dollars monthly because of a single year where their income spiked. When you’re planning Roth conversions or asset sales, always check the IRMAA brackets two years out. You can find current threshold details at Medicare.gov. And for a broader look at how rising premiums are quietly eroding Social Security raises, read Medicare Part B Premium Eating Your Social Security Raise?.
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Step 5: Adjust Your Withholding or Estimated Payments Before January 2026
If you do nothing else from this list, do this: update your tax withholding. Most retirees either have no federal tax withheld from Social Security (the default) or have a flat amount from years ago that no longer reflects reality.
You can file IRS Form W-4V to request voluntary withholding from your Social Security benefits at 7%, 10%, 22%, or 37%. If you have IRA or pension income, update your W-4P with the payer. And if you have investment income, estimated quarterly payments (Form 1040-ES) may be necessary to avoid underpayment penalties.
I recommend retirees review withholding every November for the following year. With 2026 brackets likely higher, the withholding rate that kept you even in 2024 could leave you owing a four-figure tax bill in April 2027 — plus potential penalties for underpayment. A 15-minute phone call to the SSA or your brokerage can prevent a very unpleasant surprise.
What If Congress Extends the TCJA?
As of mid-2025, there are active proposals in Congress to extend some or all of the TCJA provisions. The House passed a budget framework in early 2025 that included language about making the individual tax cuts permanent. But “framework” isn’t law, and the legislative process is unpredictable.
My advice to clients is straightforward: plan as though the rates are reverting, and celebrate if they don’t. Every strategy above — Roth conversions, withdrawal sequencing, withholding adjustments — is beneficial regardless of what Congress does. You’re building tax flexibility, and that never goes to waste.
“Hope is not a tax strategy. I tell every retiree: prepare for the brackets we know are coming. If Congress extends the cuts, you’ll simply have more room to maneuver — not less.” — Margaret Chen, CFP®
The Bigger Picture: Inflation, Taxes, and Retirement Security
Inflation Hasn’t Gone Away
Even with CPI moderation in 2025, cumulative inflation since 2020 has raised everyday costs — groceries, utilities, insurance, home maintenance — by roughly 20-22%. Social Security COLAs over that same period, while historically large in some years, haven’t fully kept pace when you factor in the taxation of those increases.
A 2025 Employee Benefit Research Institute survey found that 40% of retirees reported spending more than expected in the first five years of retirement, with healthcare and housing maintenance leading the list. The costs of aging in place often surprise retirees who planned primarily around food and utility bills.
The Psychological Trap
What concerns me as a planner isn’t just the math — it’s the behavioral response. When retirees see taxes eating into their Social Security, many react by pulling more from savings to maintain their lifestyle. That accelerates portfolio depletion, which increases anxiety, which sometimes leads to risky investment decisions or falling for scams promising guaranteed returns. (If that sounds far-fetched, the data says otherwise — financial scams targeting older adults cost $28.3 billion annually.)
The antidote is planning. Not perfection — just thoughtful, proactive steps taken before the calendar flips.
A Quick-Reference Checklist for the Rest of 2025
Print this out. Stick it on your refrigerator. Share it with your spouse or financial advisor.
- July–August 2025: Run your 2026 tax projection. Calculate combined income under both current and reverted brackets.
- August–October 2025: Execute Roth conversions if the numbers make sense. Stay below IRMAA thresholds.
- October 2025: Review the 2026 COLA announcement (typically released in mid-October by the SSA) and recalculate.
- November 2025: Adjust federal withholding on Social Security (Form W-4V) and any pensions/IRAs (Form W-4P).
- December 2025: Take required minimum distributions (RMDs) if applicable. Consider charitable qualified distributions (QCDs) from IRAs if you’re 70½ or older — these satisfy your RMD without adding to taxable income.
- January 2026: Confirm new withholding rates are in effect. Set calendar reminders for quarterly estimated tax payments if needed.
Final Thought: You Have More Control Than You Think
The Social Security tax cliff in 2026 sounds alarming — and it deserves your attention. But it’s not a cliff you have to fall off. With six months of lead time and the right strategy, you can position yourself to keep significantly more of your benefits.
I’ve guided hundreds of retirees through tax law changes, market downturns, and Medicare surprises. The ones who fare best aren’t the wealthiest — they’re the ones who plan ahead, stay informed, and make small adjustments before deadlines force their hand.
Start with Step 1 this week. Pull up your Social Security statement, grab a calculator, and find out where you stand. Everything else follows from there.
About Margaret Chen, CFP®, MBA Finance
Margaret Chen is a Certified Financial Planner™ (CFP®) with more than 18 years of experience guiding American seniors through retirement planning, Social Security optimization, and Medicare decisions. She holds an MBA in Finance and has dedicated her career to helping retirees protect their savings, maximize their benefits, and avoid the most common financial mistakes that derail retirement. At Daily Trends Now, Margaret writes practical, fact-checked guides that translate complex financial topics into clear action steps for older Americans.
