New Update: Healthcare Costs Increasing by Over 60% in Some States. Will you be impacted?

Are Ghost Taxes Creeping Into Your Costco Wholesale Retirement Plan?

Healthcare Provider Update: Healthcare Provider for Costco Wholesale: Costco Wholesale partners with a range of healthcare providers through its Costco Health Insurance Marketplace. This includes various insurers that offer health plans to members, with options for individual and family coverage as well as plans targeted towards small and large groups. Healthcare Cost Increases in 2026: In 2026, healthcare costs are poised to rise sharply, largely due to the anticipated expiration of enhanced federal premium subsidies for Affordable Care Act (ACA) marketplace plans. Without these subsidies, many enrollees could face premium increases exceeding 75%, dramatically impacting their out-of-pocket expenses. As leading insurers report significant revenue and profit growth, the convergence of high medical costs and aggressive rate hikes is set to create a challenging landscape for healthcare affordability. This situation compels individuals and employers alike to reconsider their healthcare strategies heading into 2026. Click here to learn more

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

How Costco Wholesale 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 Costco Wholesale.

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 Costco Wholesale 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.

Featured Video

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.

How does Costco implement its 401(k) retirement plan for employees, and what specific contributions does Costco make to this plan? In the context of retirement planning, understanding the structure and benefits of the 401(k) plan is crucial for employees as they approach retirement. Costcoâ€™s approach in this regard offers an insight into how the company supports its employees' retirement financial goals. This question invites an exploration of plan details such as contribution options, matching contributions, and the vesting schedule.

Costco implements its 401(k) retirement plan by providing eligible employees with options to save for retirement through pre-tax contributions, which are matched by the company to a certain extent. Employees can contribute a percentage of their salary, and Costco offers matching contributions to support long-term savings. The vesting schedule typically ensures employees gain full rights to these contributions over a period, promoting loyalty and retention.

What options does Costco provide for employees nearing retirement when it comes to healthcare benefits, and how do these options integrate with retirement planning? This question focuses on the interplay between healthcare benefits and retirement. As employees contemplate retirement, the associated healthcare costs become paramount. Analyzing Costcoâ€™s healthcare offerings can provide insights into how employees can effectively plan for these expenses in their retirement years.

For healthcare benefits nearing retirement, Costco provides employees with a range of options that can integrate with Medicare or other post-retirement health plans. These options help employees manage healthcare expenses as part of their broader retirement planning strategy, ensuring that healthcare costs are mitigated during retirement years.

In what ways can employees at Costco leverage deferred compensation plans as part of their overall retirement strategy? Deferred compensation plays a significant role in an employeeâ€™s financial planning for retirement. This question encourages a detailed examination of how Costcoâ€™s deferred compensation plans work, including eligibility criteria, potential tax implications, and strategic considerations for maximizing retirement income.

Deferred compensation plans at Costco allow employees to defer a portion of their income, reducing their taxable income in the present and postponing tax obligations until retirement when they may be in a lower tax bracket. These plans are typically used as a part of a broader financial retirement strategy, with eligibility criteria and options varying by employee role and tenure.

How does Costco ensure that its retirement benefits remain competitive compared to industry standards, and what is the company's strategy for employee retention through these benefits? Understanding Costcoâ€™s competitive stance in the marketplace regarding retirement benefits can shed light on both employee retention strategies and the effectiveness of their benefits packages. This inquiry can lead to an analysis of how Costco benchmarks its benefits against other employers in the retail sector.

Costco ensures competitiveness in retirement benefits by benchmarking against industry standards, ensuring its offerings are attractive to both new and existing employees. By maintaining competitive benefits, including 401(k) matching and deferred compensation, Costco uses these packages to support employee retention and satisfaction.

What resources and support does Costco offer to employees as they transition into retirement, and how can employees take full advantage of these resources? This question addresses the process of transitioning into retirement, focusing on the specific support mechanisms that Costco provides. Employees will benefit from understanding the companyâ€™s available resources, which could include financial planning services, retirement seminars, or counseling.

Costco offers several resources to aid the retirement transition, including financial planning tools, counseling services, and seminars aimed at helping employees maximize their benefits. Employees are encouraged to engage with these resources early to better prepare for retirement and take full advantage of available benefits.

How does Costco floor the balance between short-term incentives and long-term retirement benefits for its employees? Balancing immediate compensation with future retirement savings is crucial for a well-rounded benefits strategy. This question prompts a deep dive into Costco's compensation structure, examining the reasoning behind their approach and how it affects employeesâ€™ financial well-being over time.

Balancing short-term incentives and long-term benefits, Costco’s strategy focuses on offering a combination of immediate financial rewards, such as bonuses, alongside robust retirement savings plans like the 401(k) and deferred compensation options. This approach ensures that employees are motivated in the present while still planning for their future financial well-being.

What role do employee contributions play in the overall retirement savings plan at Costco, and how are these contributions managed by the company? Exploring the significance of employee contributions within Costcoâ€™s retirement savings framework fosters a better understanding of personal investment in retirement funds. This question calls for a look into how employee contributions are utilized, investment options available, and company management of these funds.

Employee contributions to Costco’s 401(k) plan are managed through a system that allows employees to invest their contributions in a variety of investment options. The company matches a portion of these contributions, and employees can monitor and adjust their contributions as part of their overall retirement savings strategy.

How can employees at Costco prepare for changes in tax regulations regarding retirement benefits, particularly in light of updates from the IRS? With ongoing changes to tax codes, especially those affecting retirement income, employees need guidance on effective preparation strategies. This question opens the floor for discussing IRS updates, implications for Costco employees, and proactive planning steps.

Costco prepares employees for changes in tax regulations by providing updates through internal communications and offering access to financial planning resources. These resources guide employees in understanding IRS updates and help them adjust their retirement plans to accommodate tax law changes.

How does Costco handle communications regarding retirement benefits for employees, and what channels are available for employees to seek clarification or support? Effective communication is essential in benefits administration, particularly for retirement planning. This question seeks insight into the methods Costco employs to communicate benefits information and how employees can navigate these channels for assistance.

Communication regarding retirement benefits at Costco is handled through multiple channels, including online portals, direct mail, and HR consultations. Employees can seek clarification and support through these methods, ensuring they fully understand their retirement options and any changes that occur.

How can employees contact Costco for further information regarding their retirement benefits and any changes that may occur? Awareness of how to obtain additional information is vital for employees as they navigate retirement planning. This question centers on providing Costco employees with clear guidance on whom to contact and the process involved, ensuring that they are well-informed about their options.

Employees can contact Costco for retirement benefits information through HR support lines, online employee portals, or in-person consultations with benefits specialists. This allows employees to stay informed about their retirement plans and any potential updates that may impact their long-term financial planning.

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

Leading wholesale retailer

Costco offers stock options to eligible employees. The stock options vest over time, providing long-term incentives.