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Are Ghost Taxes Creeping Into Your First Horizon Retirement Plan?

Healthcare Provider Update: First Horizon offers health, dental, and vision insurance tailored to individual and family needs. Employees benefit from HSAs, FSAs, disability coverage, and parental leave. The company provides a 401(k) with up to 6% matching, adoption reimbursement, and wellness programs. Additional perks include tuition reimbursement, mentoring, and digital wellness platforms3. First Horizon With ACA premiums projected to rise sharply, First Horizons employer-sponsored plans and financial wellness tools help employees avoid the volatility of marketplace costs. Their matched savings and flexible spending options provide a buffer against rising healthcare expenses. Click here to learn more

'Many First Horizon employees underestimate how much “ghost taxes” can erode retirement income. Understanding these hidden thresholds today can help you make more thoughtful decisions for tomorrow’s financial well-being,' — Michael Corgiat, a representative of The Retirement Group, a division of Wealth Enhancement.

'Many First Horizon employees are surprised by how quickly hidden taxes like AMT, NIIT, and IRMAA can reduce retirement income, making it important for retirees to stay informed and thoughtfully plan so these costs don’t catch them off guard.' — Brent Wolf, a representative of The Retirement Group, a division of Wealth Enhancement.

In this article, we will discuss:

The five “ghost taxes” that may unexpectedly impact retirement income.
How these taxes can affect First Horizon employees and retirees.
Strategies to better understand and prepare for these tax implications.

How First Horizon Employees Can Prepare for the Five “Ghost Taxes” That Could Haunt Retirement

There are several lesser-known surcharges and thresholds that may unexpectedly increase your tax bill in retirement, even if you already understand federal, state, and local tax obligations. These include the Alternative Minimum Tax (AMT), the Net Investment Income Tax (NIIT), the Medicare Income-Related Monthly Adjustment Amount (IRMAA), the Social Security “tax torpedo,” and the new senior deduction. Because many of these thresholds are not adjusted for inflation, they increasingly impact retirees, including those from First Horizon.

1. AMT: Alternative Minimum Tax

The AMT is a parallel tax system designed to make sure higher-income individuals pay at least a minimum amount of taxes. It has its own tax brackets, forms, and rules, with a top rate of 28%. ¹ Some deductions available under the traditional tax system are limited under AMT rules.

For 2025, the AMT exemptions are:

- $88,100 for single filers (phasing out at $626,350)
- $137,000 for married couples filing jointly (phasing out at $1,252,700)

High income, exercising incentive stock options, large capital gains, or numerous itemized deductions may trigger AMT. Even though long-term capital gains receive preferential tax treatment, they can still reduce your AMT exemption. If AMT is paid in one year, a tax credit may be available in future years when AMT is not owed.

2. NIIT: Net Investment Income Tax

The NIIT applies a 3.8% tax on net investment income when modified adjusted gross income (MAGI) exceeds:

- $200,000 for single filers
- $250,000 for married couples filing jointly ²

This tax applies to dividends, interest, rental income, gains from home sales, and capital gains beyond exclusion limits. Withdrawals from 401(k)s and traditional IRAs are not directly taxed by NIIT, but they may increase MAGI and cause other investment income to be taxed.

Strategies to limit exposure include contributing to traditional retirement accounts, using health savings accounts (HSAs), and tax-loss harvesting. For instance, tax-loss harvesting allows you to use up to $3,000 in capital losses annually to offset ordinary income. ³

For individuals age 70½ or older looking to reduce MAGI, qualified charitable distributions (QCDs) may help. QCDs allow you to donate to qualified charities on a tax-free basis directly from your IRA, satisfying required minimum distribution (RMD) rules without bringing distributions into income. In 2025, up to $108,000 may be donated tax-free. ⁴

3. IRMAA: Income-Related Monthly Adjustment Amount

IRMAA adds a surcharge to Medicare Parts B and D premiums for higher-income retirees and is based on MAGI from two years prior.

For 2025, IRMAA applies when MAGI exceeds:

- $106,000 for single filers
- $212,000 for married couples filing jointly

Even a small increase above these limits can place retirees in a higher premium bracket. Tax-exempt interest from municipal bonds is included in MAGI for IRMAA purposes. Premiums and IRMAA can be deducted from Social Security payments or paid directly. Social Security allows individuals experiencing major life changes, such as retirement or death of a spouse, to request revised IRMAA calculations.

4. The Social Security “Tax Torpedo”

Social Security benefits may be taxable depending on “provisional income,” which includes:

- Adjusted gross income
- Non-taxable interest
- One-half of Social Security benefits

If provisional income exceeds:

- $34,000 for single filers
- $44,000 for married couples filing jointly

...then up to 85% of Social Security benefits may be taxable. ⁵

Delaying Social Security up to age 70 increases benefits by 8% per year beyond full retirement age.

5. The 2025–2028 New Senior Deduction

From 2025 to 2028, individuals age 65 and older may qualify for a new senior deduction:

- $6,000 for single filers
- $12,000 for married couples filing jointly

This deduction phases out at:

- $75,000 MAGI for single filers
- $150,000 MAGI for joint filers

This is separate from the standard senior deduction, which currently adds $2,000 for individuals or $3,200 for married couples age 65 or older.

Need Help Navigating These Taxes?

Understanding how AMT, NIIT, IRMAA, Social Security rules, and senior deductions affect retirement income can be complex, especially for First Horizon retirees managing pensions, 401(k)s, and other investments. The Retirement Group can help you better understand how these tax considerations relate to your retirement planning. Call (800) 900-5867 for guidance.

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Articles you may find interesting:

Sources:

1. Tax Foundation. “ 2026 Tax Brackets .” 9 Oct. 2025.

2. Gravelle, Jane G., and Don J. Marples. The 3.8% Net Investment Income Tax: Overview, Data, and Policy Options . Congressional Research Service, 30 June 2023, crsreports.congress.gov/product/pdf/R/R41413.

3. IRS. ' Topic no. 409, Capital gains and losses .' 12 Sep. 2025.

4. Wealth Enhancement. ' 7 Tax Moves to Consider Before The End of The Year ,' by Mary Taliaferro, CFP. Nov. 5, 2025.

5. Investopedia. ' Provisional Taxes: What They Are and How They Work ,' by Julia Kagan. 4 Sep. 2025.

What type of retirement savings plan does First Horizon offer to its employees?

First Horizon offers a 401(k) retirement savings plan to help employees save for their future.

Does First Horizon provide matching contributions to the 401(k) plan?

Yes, First Horizon provides a matching contribution to the 401(k) plan, which helps employees maximize their retirement savings.

What is the eligibility requirement to participate in First Horizon's 401(k) plan?

Employees at First Horizon are eligible to participate in the 401(k) plan after completing a specific period of service, typically within the first year of employment.

How can employees at First Horizon enroll in the 401(k) plan?

Employees can enroll in First Horizon's 401(k) plan through the company’s HR portal or by contacting the HR department for assistance.

What investment options are available in First Horizon's 401(k) plan?

First Horizon offers a variety of investment options in its 401(k) plan, including mutual funds, target-date funds, and other investment vehicles.

Can employees at First Horizon take loans against their 401(k) balance?

Yes, First Horizon allows employees to take loans against their 401(k) balance under certain conditions, as outlined in the plan documents.

What is the vesting schedule for First Horizon's 401(k) matching contributions?

The vesting schedule for First Horizon's matching contributions typically follows a graded schedule, which means employees earn ownership of the match over a period of time.

Are there any fees associated with First Horizon's 401(k) plan?

Yes, there may be administrative fees associated with First Horizon's 401(k) plan, which are disclosed in the plan documents.

How often can employees at First Horizon change their 401(k) contribution amount?

Employees at First Horizon can change their 401(k) contribution amount at any time, subject to the plan's guidelines.

What is the maximum contribution limit for First Horizon's 401(k) plan?

The maximum contribution limit for First Horizon's 401(k) plan is set by the IRS and may change annually; employees should refer to the latest IRS guidelines for specifics.

With the current political climate we are in it is important to keep up with current news and remain knowledgeable about your benefits.

First Horizon National Corporation offers both a pension plan and a 401(k) plan to its employees. The First Horizon National Corporation Pension Plan is a defined benefit corporate pension fund that was established in 1946. This pension plan provides retirement, death, and disability benefits to eligible employees and their beneficiaries. The assets of the pension plan are managed by the Pension, Savings, and Flexible Compensation Committee, with First Tennessee Bank National Association serving as the trustee (PitchBook). In addition to the pension plan, First Horizon provides a 401(k) plan where employees can save for retirement with contributions matched by the company up to 6% of their pre-tax income. The 401(k) plan also includes various savings and money management tools, such as Health Savings Accounts (HSA) and Flexible Spending Accounts (FSA), which allow employees to set aside pre-tax income for healthcare and dependent care expenses

Restructuring and Layoffs: In early 2024, First Horizon announced a significant restructuring plan aimed at streamlining operations and reducing costs. The bank plans to cut approximately 5% of its workforce over the next year as part of this initiative. This move is in response to increasing operational expenses and the need to enhance efficiency in a challenging economic environment. This news is particularly relevant as it reflects broader trends in the banking sector where institutions are adjusting their workforces to remain competitive amidst economic uncertainty.

First Horizon Corporation (FHN) provides a comprehensive employee stock option and Restricted Stock Unit (RSU) program aimed at retaining top talent and incentivizing long-term performance. First Horizon offers both stock options and RSUs to eligible employees, primarily those in executive or senior management roles. These awards generally vest over a period of three to five years, with specific performance metrics tied to company performance and stock price. Employees who meet certain job levels and performance criteria are eligible to participate in these equity compensation plans. In 2022, First Horizon offered RSUs that vest annually, providing employees with ownership stakes in the company. By 2023 and 2024, the bank continued this program with slight adjustments, including expanded eligibility and adjusted performance criteria (

First Horizon Health Benefits Overview Company Website: The official First Horizon website provides the most direct and accurate information. Glassdoor: This site often has employee reviews and details about health benefits, including recent changes or feedback from employees. Indeed: Similar to Glassdoor, Indeed might have employee reviews and specific information about health benefits and any recent updates. LinkedIn: Sometimes companies post updates about employee benefits or changes in health-related policies here. Benefits.gov: This site provides general information about employee benefits and might have relevant details or changes affecting First Horizon.