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How Ameren Employees Can Use Intentionally Defective Grantor Trusts (IDGTs) in Estate Planning

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“Ameren employees reviewing IDGTs can benefit from understanding how these trusts may support long-term legacy planning, although qualified legal and tax professionals should review these strategies to determine whether they fit into their overall goals.” ~ Wesley Boudreaux, a representative of The Retirement Group, a division of Wealth Enhancement.

“Ameren employees considering an IDGT should recognize how this strategy may support long-term wealth transfer goals, although these structures should be reviewed with qualified legal and tax professionals to determine whether they align with each household’s broader plan.” ~ Patrick Ray, a representative of The Retirement Group, a division of Wealth Enhancement.

In this article, we will discuss:

How intentionally defective grantor trusts (IDGTs) work.
The advantages and potential limitations of using an IDGT.
Key considerations for Ameren employees evaluating this type of planning strategy.

An irrevocable trust arrangement known as an intentionally defective grantor trust (IDGT) allows the grantor to move assets out of their taxable estate while still being treated as the owner of those assets for income tax purposes. Many people, including Ameren employees with high-growth or income-producing holdings, may benefit from using this strategy to support long-term wealth preservation.

How an Intentionally Defective Grantor Trust Works

For tax purposes, different kinds of trusts receive different treatment, and understanding the distinctions can help Ameren professionals review planning strategies more effectively.

Revocable Trusts

In a revocable trust, the grantor is taxed on trust income and is regarded as the owner for income tax purposes. A separate trust income tax return is usually unnecessary. These assets generally remain inside the grantor’s taxable estate because the grantor maintains full control.

Irrevocable Trusts

An irrevocable trust is treated as its own tax entity, filing its own return and taking its own deductions. When properly drafted so the grantor does not retain certain powers or interests, assets transferred to an irrevocable trust are generally removed from the taxable estate, a detail that can matter for Ameren professionals with substantial savings or investment holdings.

How IDGTs Combine These Features

An IDGT is structured as an irrevocable trust for estate and gift tax purposes, removing assets from the taxable estate, but is treated as a grantor trust for income tax purposes. As long as the grantor pays income taxes on trust earnings, the trust’s assets can grow outside the estate, which may appeal to Ameren professionals with long-term legacy goals.

Why It’s Called “Intentionally Defective”

The trust is drafted so that, under IRS grantor-trust rules, the grantor remains the owner for income tax purposes due to certain retained powers. At the same time, the trust is irrevocable for estate tax purposes, allowing the assets to remain outside the taxable estate—a structure that may assist with multigenerational planning.

Advantages of an Intentionally Defective Grantor Trust

Because an IDGT is a grantor trust for income tax purposes, the grantor pays income tax on trust earnings. This leads to two important benefits that may interest Ameren employees with high-value assets:

- Trust assets can grow for beneficiaries without being reduced by income tax payments.
- Income tax paid by the grantor reduces the taxable estate without being classified as a gift.

- This dynamic—where grantors use personal funds to pay taxes that would otherwise reduce trust assets—is often referred to as a “tax burn.”

How Assets Are Transferred to an IDGT

Ameren employees reviewing wealth transfer strategies may encounter two common approaches:

1. Gift or Partial Gift/Sale

A grantor can move assets to an IDGT as a gift. If the gift stays within the lifetime gift and estate tax exemption, it typically does not create out-of-pocket gift tax. Some planning approaches combine a partial gift with a sale to balance estate goals.

2. Sale to the IDGT

Many grantors sell assets to an IDGT in exchange for a promissory note with an interest rate at or above the IRS Applicable Federal Rate (AFR).

- The sale is typically not treated as a taxable gift if conducted at fair market value.
- Appreciation above the AFR occurs outside the grantor’s estate for beneficiaries.
- When AFR rules and loan requirements are followed, the note is treated as valid consideration and carries an interest obligation.

Potential Drawbacks of an IDGT

Once established, an IDGT is difficult to modify, similar to other irrevocable trusts. Outcomes also depend on the trust assets growing at a rate higher than the AFR. If that does not occur, the intended estate planning benefits may fall short—an important consideration for Ameren employees reviewing various asset types.

Who Might Consider an IDGT?

An IDGT can be appealing for families facing potential estate tax exposure, especially when transferring assets with strong growth potential. This approach works best when the grantor has sufficient liquidity to continue paying the trust’s income taxes personally, a factor some Ameren employees review when assessing retirement and estate liquidity. Because the structure requires precise legal drafting, it should be established with qualified legal counsel.

Need Support with IDGTs or Retirement Planning?

The Retirement Group can assist you in reviewing whether an IDGT fits into your broader retirement and estate plan as a Ameren employee. For guidance tailored to your long-term goals, call us at (800) 900-5867 .

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Sources:

1. BMO Wealth Management. Herman, Brad. Intentionally Defective Grantor Trust. BMO Financial Group, Oct. 2021,
https://uswealth.bmo.com/media/filer_public/8b/3f/8b3f85c6-21b0-407e-bfbf-0f9b181c1673/bwm_idgtarticle_1103.pdf .

2. Fidelity Wealth Management. “What Is an Intentionally Defective Grantor Trust (IDGT)?” Fidelity Viewpoints , 4 Dec. 2025,
https://www.fidelity.com/viewpoints/wealth-management/insights/intentionally-defective-grantor-trusts .

3. Hirtle, Callaghan & Co. Estate Planning With Intentionally Defective Grantor Trusts.
Hirtle, Callaghan & Co., 2020,
https://www.hirtlecallaghan.com/wp-content/uploads/2020/08/Intentionally-Defective-Grantor-Trusts.pdf .

4. Nevada Trust Company. Ford-Grella, Jaclyn. “How Intentionally Defective Grantor Trusts Can Safeguard Assets for Future Generations.” Nevada Trust Company , 10 Dec. 2024,
https://www.nevadatrust.com/how-intentionally-defective-grantor-trusts-can-safeguard-assets-for-future-generations/ .

How does the Ameren retirement plan design ensure that employees' benefits under the Union Cash Balance Plan grow over time, and what specific features contribute to this growth? Discuss how amortization methodologies and interest credits are determined for Ameren employees, particularly in relation to age and years of service.

Growth of Benefits: Ameren’s Union Cash Balance Plan ensures growth through annual interest credits and regular credits based on the employee’s age and pensionable earnings. Interest credits are applied at a rate of 5%, subject to change yearly based on Treasury rates plus an additional 1%. Employees also receive regular credits that increase with age, ranging from 3% to 8% of pensionable earnings(Ameren_Corporation_Sept…).

In what ways can employees of Ameren leverage the various payment methods available to them upon retirement? Elaborate on how the choice between lump-sum payments and annuities impacts their financial planning post-retirement.

Payment Methods: Ameren offers employees flexibility in receiving benefits as a lump sum or annuity. Lump sum payments provide immediate access to all benefits, which can be rolled over into other retirement accounts, while annuities provide steady income for life. Choosing between these affects financial planning by balancing immediate liquidity versus long-term income security(Ameren_Corporation_Sept…).

What are the implications of leaving Ameren before reaching retirement age, particularly in regard to vesting and benefit access? Discuss the conditions that affect an employee's eligibility and the importance of completing the required years of service.

Leaving Before Retirement: If an employee leaves Ameren before reaching retirement age but has completed three years of service, they are vested and entitled to their full cash balance account. If an employee leaves before vesting, their account is forfeited. Completing the required years of service is critical for retaining benefits(Ameren_Corporation_Sept…).

How does the Ameren Corporation balance contributions to the retirement plan with the need to comply with IRS regulations, specifically with the aim of avoiding a "top heavy" classification? Analyze how this impacts employee benefits and the strategies used by Ameren to ensure compliance.

Compliance with IRS Regulations: Ameren ensures compliance with IRS “top heavy” rules by monitoring the allocation of contributions to avoid excessive benefits going to key employees. If more than 60% of benefits are allocated to key employees, Ameren must provide minimum benefits to non-key employees, impacting overall contributions and plan design(Ameren_Corporation_Sept…)(Ameren_Corporation_Sept…).

What are the survivor benefits options available under Ameren's Union Cash Balance Plan, and how are these benefits calculated for spouses and non-spouse beneficiaries? Provide details on how varying age differences between an employee and their beneficiary affect these calculations.

Survivor Benefits: Under the Union Cash Balance Plan, a spouse beneficiary receives survivor benefits either as a lump sum or lifetime annuity. Non-spouse beneficiaries receive a lump sum. The calculation of survivor benefits adjusts based on the age difference between the employee and the beneficiary(Ameren_Corporation_Sept…).

How do the changes in IRS limits for retirement accounts in 2024 potentially affect employees of Ameren when planning for retirement? Discuss the strategic considerations Ameren employees should take into account in relation to contribution limits and catch-up provisions.

IRS Limits and 2024 Changes: Changes to IRS contribution limits in 2024 may affect employees by altering the maximum they can contribute to retirement accounts, including catch-up provisions for those over 50. Ameren employees should monitor these changes to maximize their retirement savings strategies(Ameren_Corporation_Sept…).

In what ways does the Ameren Corporation's retirement plan administration ensure transparency and participant rights, particularly under ERISA? Explore the various rights employees have regarding access to plan documents and the recourse available in the event of a benefit claim denial.

ERISA Rights and Transparency: Ameren ensures transparency and adherence to ERISA, giving employees the right to access plan documents, including the SPD and financial reports. In case of benefit claim denials, employees can appeal and, if necessary, pursue legal action(Ameren_Corporation_Sept…).

How can Ameren employees contact the company to learn more about their retirement benefits and navigate the complexities of the Union Cash Balance Plan? Discuss the available resources and support channels for employees to gain clarity on their benefits.

Contact for Plan Information: Ameren employees can contact the company through its pension benefits line at 877.7my.Ameren for details on retirement benefits and support with navigating the Union Cash Balance Plan. Online resources like myAmeren Pension Benefits also provide account information and assistance(Ameren_Corporation_Sept…).

What specific factors influence the calculation of interest credits in the Union Cash Balance Plan, and how do these credits affect the overall retirement savings of Ameren employees? Analyze the importance of understanding these factors in relation to future financial security.

Interest Credits: Interest credits are determined based on a fixed rate (5%) or the sum of Treasury Constant Maturity rates plus an additional percentage, ensuring steady account growth. Understanding how these credits accumulate is essential for predicting future retirement savings(Ameren_Corporation_Sept…).

How does the flexibility provided in the Ameren retirement plan enhance employee satisfaction and encourage long-term retention? Discuss the impact of features such as portability of benefits and options for account growth on employee engagement.

Flexibility and Retention: The portability of benefits and the ability to choose between lump sum or annuity payments enhances employee satisfaction and retention. Employees can take their vested account balance if they leave Ameren, encouraging long-term engagement(Ameren_Corporation_Sept…).

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

News: Ameren has announced a major restructuring plan involving the reduction of its workforce by 5% and a review of its pension benefits structure. The company is also implementing changes to its 401(k) plan, including reducing matching contributions to align with cost-saving measures.
Importance: Addressing this news is crucial due to the current economic uncertainty, which affects investment decisions and tax planning. The reduction in benefits and pensions could impact employees' retirement planning and financial stability, making it essential to stay informed about these changes. Additionally, the restructuring may influence Ameren's stock performance and investor sentiment in the broader market.

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For more information you can reach the plan administrator for Ameren at 1901 Chouteau Avenue St. Louis, MO 63103; or by calling them at (800) 755-5000.