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Are Ghost Taxes Creeping Into Your NiSource Retirement Plan?

Healthcare Provider Update: NiSource provides employees with a variety of health insurance options including PPO, HMO, and high-deductible plans with HSAs. Dental and vision coverage is available, along with FSAs for healthcare and dependent care. Life insurance equal to twice base pay is company-paid, with options to purchase additional coverage. Disability benefits, accident insurance, and paid sick leave are also included. Retirement benefits feature a 401(k) plan with matching, and employees may receive opt-out credits if they decline coverage 2. NiSource As ACA premiums rise, NiSources employer-sponsored plans and pre-tax savings accounts offer employees a more affordable and stable alternative to marketplace coverage. With insurers requesting double-digit increases and federal subsidies potentially expiring, employer-backed plans like NiSources help shield employees from steep out-of-pocket costs. Click here to learn more

'Many NiSource 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 NiSource 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 NiSource employees and retirees.
Strategies to better understand and prepare for these tax implications.

How NiSource 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 NiSource.

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 NiSource 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.

As an employee of National Grid, what are the key eligibility criteria for participating in the Pension Plan specifically for Niagara Mohawk Power Corporation employees? How might these criteria impact your personal retirement planning and the benefits you expect to receive upon retirement from National Grid?

Eligibility Criteria for Niagara Mohawk Pension Plan: Employees of Niagara Mohawk Power Corporation who are represented by Local Union 97 of the IBEW and work at least 20 hours per week or accumulate 1,000 hours in a Pension Plan year are eligible. Participation begins automatically on the first day of employment. These criteria directly impact retirement planning by determining when employees begin accruing pension benefits and how much they will receive at retirement(National_Grid_2023_Niag…).

Within the framework of the National Grid Pension Plan, how does the cash balance formula work in calculating retirement benefits, and what implications does this have for employees of Niagara Mohawk Power Corporation when considering their long-term financial outlook?

Cash Balance Formula: The National Grid Pension Plan for Niagara Mohawk employees uses a cash balance formula that provides monthly pay-based credits (starting at 4% and increasing with years of service) and interest credits. These accumulate in a hypothetical account, growing until retirement, allowing employees to track their retirement benefits much like a savings account. This formula impacts financial outlook by providing predictable growth tied to service and pay(National_Grid_2023_Niag…).

For employees at National Grid, what are the specific rights and options available during the pension benefit application process? How do these rights protect the interests of individual employees and ensure they receive fair treatment under the Niagara Mohawk Pension Plan?

Pension Benefit Application Process: National Grid employees must apply for their pension benefits by submitting the required forms at least 90 days before retirement. Spousal consent is required if opting for any form of payment other than the default. This ensures employees understand and select the best payment option for their circumstances, protecting their interests under the Niagara Mohawk Pension Plan(National_Grid_2023_Niag…).

Given the different types of credits that contribute to the pension benefit for employees of National Grid, how are Pay-based Credits and interest credits calculated? What strategies might Niagara Mohawk Power Corporation employees employ to maximize these credits before retirement?

Pay-based and Interest Credits Calculation: Pay-based credits are determined by years of service, starting at 4% of pay and increasing to 8% after 20 years. Interest credits are based on an annual interest rate tied to the Treasury securities and corporate bond rates. Employees can maximize these credits by continuing to work and contributing to their pension balance(National_Grid_2023_Niag…).

How do pension benefits work for Transition Group Employees specifically within National Grid's framework, and what unique provisions apply to them under the Pension Plan as compared to regular employees of Niagara Mohawk Power Corporation?

Pension Benefits for Transition Group Employees: Transition Group Employees under the National Grid Pension Plan have benefits calculated using both the former final average pay formula and the cash balance formula, with the greater benefit being paid out. This differs from regular employees who only receive benefits calculated under the cash balance formula(National_Grid_2023_Niag…)(National_Grid_2023_Niag…).

What are the repercussions for National Grid employees in terms of benefit loss or limitation if they have not met the Vesting requirements under the Niagara Mohawk Pension Plan? How can understanding these repercussions influence an employee's decision-making regarding their career and retirement?

Impact of Vesting Requirements: Employees must complete three years of service to become vested in the Niagara Mohawk Pension Plan. If they leave before vesting, they lose all accrued pension benefits. Understanding vesting requirements is crucial for career and retirement planning, as it ensures employees retain their pension benefits if they meet the criteria(National_Grid_2023_Niag…).

As a current employee at National Grid, what does the termination of the Pension Plan imply for accrued benefits under the Niagara Mohawk Pension Plan? Specifically, how do federal protections through ERISA and the Pension Benefit Guaranty Corporation come into play for employees seeking assurance regarding their retirement funds?

Termination of Pension Plan and Federal Protections: If the Niagara Mohawk Pension Plan is terminated, accrued benefits are protected by ERISA and insured by the Pension Benefit Guaranty Corporation (PBGC). Employees can feel assured that their benefits will be secured up to the PBGC's limits in case of plan termination(National_Grid_2023_Niag…).

How does the National Grid Pension Plan accommodate the unique situations of employees during times of disability or military service, and what steps should Niagara Mohawk Power Corporation employees take to ensure their benefits continue during these periods?

Disability and Military Service: Niagara Mohawk employees receive service credits during periods of disability or military leave, ensuring continuous pension accrual. Employees should ensure their disability or military status is properly documented with the company to avoid interruptions in their pension benefits(National_Grid_2023_Niag…).

When considering the various forms of pension payments available to retirees from National Grid, what are the potential advantages and disadvantages of choosing an annuity versus a lump-sum payment for employees from Niagara Mohawk Power Corporation?

Annuity vs. Lump-Sum Payment: Retirees at National Grid have the option to choose between an annuity, providing a steady income for life, or a lump-sum payment. The annuity provides financial stability, while a lump sum offers flexibility. The choice depends on individual financial needs and retirement goals(National_Grid_2023_Niag…).

For those looking to gain further clarity on the nuances of the Niagara Mohawk Pension Plan, what are the most effective ways for employees to contact National Grid for assistance? How can engaging with the Pension Service Center enhance an employee's understanding of their benefits and rights?

Contacting National Grid for Pension Assistance: Employees seeking more information about their Niagara Mohawk Pension Plan can contact the National Grid Pension Service Center or use the online pension modeler. Engaging with the Pension Service Center provides personalized guidance, helping employees understand their benefits and make informed decisions(National_Grid_2023_Niag…).