Obtaining an Estate Tax ID Number

Larry just discovered his mother passed away with a surprisingly complex estate – multiple real estate holdings, a small business, and a brokerage account exceeding $1 million. His biggest worry isn’t the probate process itself, but a frantic call from his accountant, demanding an “Estate Tax ID Number” within 72 hours to avoid massive penalties. He’s understandably panicked, fearing he’s already failing as executor. The cost of delaying this could easily run into the thousands, and he doesn’t even know where to begin.

As an estate planning attorney and CPA with over 35 years of experience, I see this situation repeatedly. The rush for an Employer Identification Number (EIN) for the estate is often the first major hurdle for executors, and it’s crucial to navigate it correctly. While most estates won’t owe estate tax, the IRS still requires an EIN if certain thresholds are met, even for simple administrative purposes like opening a bank account in the estate’s name or selling assets.

What Triggers the Need for an Estate Tax ID Number?

The requirement hinges primarily on whether the estate exceeds certain gross estate values or has income over a specific amount. Generally, any estate with a gross value exceeding $60,000 requires an EIN. However, even if the estate is below that threshold, an EIN is still necessary if the estate:

• Operates a business: If your loved one owned a sole proprietorship, partnership, or LLC, the estate will likely need an EIN to continue operations.
• Has employees: If the estate hires anyone to manage property or the business, an EIN is essential for payroll.
• Maintains more than one bank account: While not always a strict requirement, most banks will insist on an EIN for multiple accounts.
• Elects to make tax elections: The estate may need an EIN to elect certain tax strategies, like deferring capital gains through special use valuation.

How Do I Obtain an Estate Tax ID Number?

The process is fortunately straightforward and can be completed online through the IRS website. You’ll need to complete Form SS-4, the Application for Employer Identification Number. The form requires basic information about the estate, the deceased, and the executor. Crucially, you’ll need to accurately identify the estate’s responsible party – this is almost always the executor. Be prepared to provide your Social Security number and contact information. The IRS typically processes applications within 24-48 hours, providing you with a nine-digit EIN via mail or electronically.

Why a CPA is Invaluable During This Process

Obtaining the EIN is only the first step. As a CPA, I emphasize the importance of understanding the tax implications that follow. For example, the estate may be entitled to a “step-up in basis” for assets inherited, reducing potential capital gains taxes when they are eventually sold. Proper valuation of assets is critical to maximize this benefit, and an experienced CPA can ensure you’re following the IRS guidelines. Furthermore, a CPA can help navigate complex tax elections available to estates, minimizing tax liabilities and maximizing the inheritance for your beneficiaries. Without this expertise, you could unknowingly leave significant money on the table.

…for deaths on or after April 1, 2025, executors may avoid full probate for personal property under $208,850. Notably, AB 2016 now allows a simplified ‘Petition to Determine Succession’ for a primary residence valued up to $750,000. Per Probate Code § 13050, you MUST exclude all California-registered vehicles and up to $20,875 in unpaid salary from the small estate calculation.

What makes a California will legally enforceable when it matters most?

In California, a last will and testament operates within a probate system that emphasizes intent, clarity, and procedural compliance. When properly drafted, a will does more than distribute property—it creates legally enforceable instructions that guide courts, fiduciaries, and beneficiaries through administration with fewer disputes and less uncertainty.

When a will is drafted with California probate review in mind, it becomes a stabilizing roadmap rather than a source of conflict. Clear intent, proper authority, and compliant execution protect both families and estates.

Official Legal Standards and Resources for California Executors

• Mandatory Judicial Forms:
  Judicial Council of California – Probate Forms (DE Series)
  The official repository for all “Decedents’ Estates” forms; in 2026, this includes mandatory updated forms for the $208,850 Small Estate threshold and the new AB 2016 simplified petitions for primary residences valued under $750,000.
• Riverside County Local Rules:
  Riverside Superior Court – Executor FAQ
  A localized resource for Riverside County fiduciaries that outlines 2026 requirements for mandatory e-filing, Local Rule 7010 for remote appearances, and specific duties regarding the 4-month creditor claim period.
• Federal Tax Compliance:
  IRS Guidelines for Executors (Form 706 & 1041)
  The authoritative federal guide for filing a final 1040 and the estate’s 1041; it reflects the 2026 OBBBA update, which established a permanent $15 million individual estate tax exemption, effectively ending the previous “tax cliff” uncertainty.
• Statutory Duty of Care:
  California Probate Code § 9600 (The Prudent Person Rule)
  Codifies the “Prudent Person Rule,” stipulating that an executor must manage estate assets with reasonable care and skill; it remains the primary legal standard in 2026 for determining if a fiduciary is liable for mismanagement or “surcharge.”
• Digital Asset Authority:
  Revised Uniform Fiduciary Access to Digital Assets Act (RUFADAA)
  Access California Probate Code §§ 870-884, which governs an executor’s power to manage online accounts; it clarifies why service providers can legally block access to private emails and crypto-wallets without explicit “prior consent” in the estate plan.