The ADAPT Framework: Navigating Interstate Estate Planning for Advisors

Interstate estate planning requires advisors to coordinate across multiple state laws to minimize taxes, avoid ancillary probate, and ensure plan validity. The ADAPT framework—Assess, Domicile, Asset Transfer, Plan Review, Team Coordination—gives you a repeatable methodology for guiding clients who own property or reside in more than one state.

Introduction to the Framework

When a client owns real estate in multiple states or relocates during retirement, their estate plan suddenly touches multiple jurisdictions. Each state has its own estate tax exemption, probate rules, and trust laws. A will that works perfectly in one state may be invalid in another. The ADAPT framework helps you systematically address these multistate estate planning challenges without missing critical steps. Whether you're a financial advisor, attorney, or trust officer, this mental model ensures you cover domicile, tax exposure, asset titling, and cross-state coordination in every engagement.

Why This Framework Works

Traditional estate planning often assumes a single state of residence. But many clients have vacation homes, rental properties, or adult children living in different states. The ADAPT framework works because it mirrors the natural progression of a client's life changes: they acquire assets, move, and need updates. By following a structured sequence, you avoid the common pitfall of treating multistate issues as an afterthought. According to industry research, advisors who proactively review state-level tax exposure can save clients hundreds of thousands of dollars. The framework also builds trust with clients who see you as anticipating problems they didn't know existed.

The Framework Steps

1. Assess Current Situation

Start by gathering a complete picture of the client's assets, locations, and existing plan. Create a checklist:

• List all states where the client owns real property or has a business.
• Identify the client's domicile (permanent home) and any recent or planned moves.
• Document all existing wills, trusts, beneficiary designations, and powers of attorney.

This step reveals which states have jurisdiction over which assets. For example, real property is subject to the probate laws of the state where it sits. So a client with a home in Florida and a condo in New York must comply with both states' probate requirements.

2. Domicile Determination

Domicile is the state where a client intends to live permanently and is a critical factor in estate tax exposure. Many states, including those with their own estate taxes, use domicile to determine residency. Take concrete steps to establish domicile:

• Update driver's license, voter registration, and vehicle registration to the new state.
• File tax returns as a resident of the intended domicile.
• Spend more than half the year in that state and maintain a local address.

If a client claims a new domicile but keeps strong ties to the old state (e.g., a business, frequent visits), both states may claim residency. Determining domicile early avoids unnecessary dual taxation and legal fights.

3. Asset Transfer to Avoid Ancillary Probate

Ancillary probate occurs when real estate in another state requires a separate court proceeding after death. This process can delay distributions for months and add thousands in legal fees. The most effective workaround is to transfer titled assets into a revocable living trust or a limited liability company (LLC) while the client is alive.

• For real property: retitle the deed into the trust or LLC name. Since the trust or LLC owns the property, there is no need for probate in the state where the property sits.
• For financial accounts: retitle them into the trust or update beneficiary designations to pass outside probate.

This step is especially important for clients with property in probate-heavy states like California or New York.

4. Plan Review for Tax and Legal Compliance

Every state has unique rules for estate and inheritance taxes, trust administration, and formalities for executing wills. Review the client's plan for:

• State estate tax exposure: As of 2025, 13 states and DC impose their own estate or inheritance taxes, with exemptions ranging from $1 million to over $15 million. Many states have a “cliff” structure—if the estate exceeds the exemption by even $1, the entire estate is taxed. Run calculations for each state where the client has ties.
• Trust law differences: Trust administration laws vary by state, including notice requirements, accounting standards, and trust protector provisions. A trust that is valid in one state may fail or be treated differently in another.
• Will formalities: Some states require two witnesses, others require a notary. Ensure the will meets the formalities of the client's current domicile and any state where it might be probated.

Use an estate tax calculator to quickly estimate exposure across states. Manually calculating for multiple states is error-prone; a tool (like those available through our platform) can run the numbers in minutes.

5. Team Coordination

Interstate planning requires collaboration among professionals in each relevant state. The client's attorney in the old state may not be licensed in the new state. Assemble a team that includes:

• An estate planning attorney in the domicile state.
• A CPA familiar with multistate tax returns.
• A financial advisor who coordinates the overall strategy.
• For complex situations, an attorney licensed in the state where real property is located.

Regular communication among the team ensures that updates in one state don't create conflicts in another. For example, if the domicile state changes its estate tax exemption, the plan may need adjustments. Our guide on Estate Planning for Professional Advisors: A Complete Guide covers how to build these relationships.

How to Apply It

Apply the ADAPT framework whenever you encounter a client who lives in one state but owns property or plans to move to another. Start with a quick assessment: ask about real estate holdings, prior moves, and existing documents. Then walk through each step in order. The framework is designed to be used in a single meeting or over several sessions, depending on complexity.

To make it actionable, download our free Interstate Estate Planning Checklist (available as part of our advisor toolkit). It contains prompts for each step, a domicile verification worksheet, and a tax exposure calculator reference.

Examples/Case Studies

Example 1: Snowbird with Homes in Two States

Carol, a retired teacher, lives in New York for six months and Florida for six months. She owns homes in both states and has a will drafted in New York 15 years ago. Applying the ADAPT framework:

• Assess: Properties in NY and FL. Domicile is unclear—she spends equal time, votes in NY, but has a Florida driver's license.
• Domicile: Determine which state she intends as permanent home. After discussion, she chooses Florida because it has no state estate tax. She updates voter registration and files a Florida declaration of domicile.
• Asset Transfer: Transfer the New York condo into a revocable living trust to avoid ancillary probate in NY. Keep the Florida home in her name (or also in trust) since Florida probate is streamlined.
• Plan Review: Update the will to comply with Florida law (two witnesses, notarized). Run estate tax calculations: NY exemption is around $6.9 million, Carol's estate is under that, but the trust avoids probate costs anyway.
• Team: Hire a Florida estate planning attorney and coordinate with her NY accountant.

Example 2: Business Owner with Rental Properties

James owns a business in Illinois and rental properties in Tennessee and Arizona. He has an existing trust but never updated it after buying the Arizona property. Using ADAPT:

• Assess: Properties in IL, TN, AZ. Trust holds some assets but not the Arizona deed.
• Domicile: Illinois remains his domicile.
• Asset Transfer: Title the Arizona property into the trust to avoid ancillary probate there.
• Plan Review: Tennessee is probate-friendly, but Arizona is not. Ensure the trust complies with Arizona's trust administration requirements. Check Illinois estate tax: exemption $4 million, James's estate is close—plan with charitable bequests to reduce exposure.
• Team: Engage an Illinois attorney for the main plan, an Arizona attorney for the property transfer, and his CPA for multistate tax planning.

Common Mistakes to Avoid

• Ignoring state estate tax cliffs: Some states tax the entire estate once the exemption is exceeded by even a dollar. A $15 million federal exemption client may still owe state tax if they live in a state with a $1 million exemption. Plan to cap estates below the cliff or use bypass trusts.
• Failing to update beneficiary designations: Retirement accounts and insurance policies with old beneficiary designations can re-establish ties to a former state and cause unintended tax consequences. Review and update after any move.
• Assuming a will is valid everywhere: A will that is valid in the client's old state may not meet the execution formalities of the new state. Re-execute after relocation.
• Overlooking ancillary probate: Even if the client has a will, real estate in another state triggers separate probate. Move assets into a trust or LLC to avoid this.

Templates/Tools

• Interstate Estate Planning Checklist: A step-by-step worksheet covering each ADAPT phase, with columns for completion dates and responsible parties. Available for download on our platform.
• State Tax Exposure Quick-Reference Table: Summarizes estate and inheritance tax exemptions, rates, and cliff provisions for all 13 states plus DC.
• Domicile Declaration Document: A template letter for clients to formalize their domicile choice (e.g., filing with the county clerk, notifying banks).

For advisors looking to integrate these tools into their practice, see How to Integrate Digital Estate Tools into Your Advisory Practice. Also, explore Best Practices for Estate Planning with High-Net-Worth Clients for advanced strategies.

Conclusion

The ADAPT framework turns the complexity of interstate estate planning into a manageable, repeatable process. By assessing the client's situation, establishing a clear domicile, transferring assets to avoid ancillary probate, reviewing the plan for multistate compliance, and coordinating a cross-jurisdictional team, you protect your clients from unnecessary taxes, legal fights, and delays. For high-net-worth clients, also consider Tax-Efficient Estate Planning Strategies for 2024 to further optimize outcomes. Start using ADAPT today—your clients will thank you for the peace of mind. And remember, free estate planning tools are available through our platform to help you and your clients get started without upfront fees.

The key is to be proactive. Don't wait for a move or a new property purchase—review every estate planning client's exposure to state-level issues annually. As one advisor noted, a five-minute tax calculator run today can save your client hundreds of thousands of dollars in tax. Use the ADAPT framework to deliver that value consistently.