Many high net worth Californians breathed a sigh of relief when they heard about the One Big Beautiful Bill Act and its promise of major federal tax cuts. What most of them did not do was sit down and map out how those changes collide with California’s own rules and the shrinking federal estate exemption coming in 2026. That blind spot is where seven and eight figure inheritance tax mistakes are born.

Here is the bottom line: if you live in California, have several million in net worth, and intend to leave that wealth to kids, grandkids, or charity, you cannot treat estate planning as something you will “get to later.” The interaction between the federal estate tax, the new income tax rules, and California’s unique environment means that the next 24 to 36 months are some of the most important of your financial life.

Quick Answer: How the One Big Beautiful Bill Act and Estate Exemptions Fit Together

The **One Big Beautiful Bill Act California estate exemption** conversation is really about timing and structure. For now, the federal estate tax exemption remains historically high, but under current law it is scheduled to drop roughly in half on January 1, 2026. California does not impose its own estate or inheritance tax, but Sacramento and Washington both want more from high earners and wealthy families in other ways. If you are a high net worth Californian and wait until after the federal exemption drops, you risk turning what could have been a tax free inheritance into a multi million dollar estate tax bill for your heirs.

How the Estate Tax Exemption Works for Californians Today

Start with the federal estate tax, because that is what actually writes the check to the IRS when you die. The estate tax is a separate system from income tax. It looks at the total fair market value of what you own at death minus debts and certain deductions, then compares that against a lifetime exemption amount. Amounts above the exemption are taxed at rates that currently top out at 40 percent. For current exemption figures and mechanics, see the IRS instructions for Form 706 and relevant guidance in estate tax guidance.

Right now the exemption is historically generous. For illustration, assume it is around $13 million per person. A married couple can effectively shield about $26 million using portability, where a surviving spouse can use a deceased spouse’s unused exemption if the estate files a timely estate tax return. That is why some California founders and real estate families with $20 million in assets have been told they are “probably fine” under current law.

The problem is the sunset. Under the law that expanded the exemption several years ago, those higher amounts are scheduled to expire after 2025. In 2026 the exemption is projected to revert to something close to half its current level, adjusted for inflation. The IRS has already issued guidance making it clear that using the higher exemption before it sunsets will not be clawed back later. In other words, if you transfer $10 million while the higher exemption is in place, and the exemption later drops to, say, $7 million, the IRS will not retroactively tax the extra $3 million you moved while the higher exemption was legal.

For a wealthy California couple with $20 million in net worth, the difference between acting before 2026 and waiting until after can easily be an eight figure tax bill to the federal government, even though California itself still does not have a separate estate tax.

How Income Tax Changes and California Policy Complicate the Picture

The One Big Beautiful Bill Act focuses on income taxes, not the estate tax directly. It has shifted where and how high earners in California feel the tax burden, particularly through SALT deduction changes and targeted cuts that largely benefit higher income households. Analysis from groups like the Tax Foundation suggests average cuts in the low thousands per year for many Californians, with the biggest dollar value benefits flowing to those already paying substantial state and local taxes.

That matters for estate planning because the cash flow you free up from income tax cuts can be redirected into lifetime gifting, funding irrevocable trusts, or buying life insurance designed specifically to cover anticipated estate tax. If your family’s effective federal income tax drops by $50,000 in a year because of OBBBA driven changes, and you are a disciplined planner, you can channel that $50,000 into strategies that permanently remove far more than $50,000 from your taxable estate.

Many capital partners and investors in California are sitting on concentrated stock positions and large unrealized gains. They are rightly watching wealth tax proposals and estate tax debates. What they often overlook is that today’s income tax landscape gives them an opportunity window before 2026 to fund smart structures with after tax dollars while the burden is relatively manageable. Ignoring that window because “Congress may change things again” is a gamble with seven figure downside.

Key estate planning moves that pair with OBBBA era income taxes

• Use current income tax savings to pay premiums on life insurance held in an irrevocable life insurance trust so death benefits are excluded from your estate.
• Shift appreciating assets to intentionally defective grantor trusts, where you keep paying income tax on the trust’s earnings, effectively making additional tax free gifts each year.
• Fund spousal lifetime access trusts so a spouse can still tap cash flow from transferred assets, while those assets and their growth avoid future estate tax.

Strategic planning like this is where a formal premium advisory relationship pays for itself. You are not just reacting to laws after they change; you are using today’s rules to pre fund tomorrow’s estate structure.

KDA Case Study: California Founder Uses the Estate Exemption Window

Consider a Silicon Valley founder, mid 50s, married, with two adult children. Between a home, a concentrated position in a late stage private company, and a diversified portfolio, their net worth is around $28 million. Under today’s higher federal exemption, they have been told that with careful planning and portability their family might avoid estate tax entirely. They have also benefited from OBBBA era income tax rules that increased their SALT deduction cap and modestly lowered their effective federal rate on wages and bonuses.

When they came to KDA, we modeled what would happen if the federal exemption drops in 2026 and no additional planning is done. On conservative growth assumptions, by the time both spouses pass, the estate could easily be worth $40 million. With a significantly lower exemption in force, the taxable portion could be over $15 million. At a 40 percent estate tax rate, that is a $6 million check to the IRS, not counting potential state level changes over the next couple of decades.

We built a plan that deliberately used the years before 2026 as a transfer window. The couple made $10 million in gifts to a pair of trusts designed to benefit their children and future grandchildren, locking in the high exemption while they still had it. They used cash flow from lower income taxes to pay ongoing income tax on the trust assets and to fund a $5 million second to die life insurance policy owned by an irrevocable trust. Now, even if the exemption is cut in half, the taxable estate at death is projected under $5 million. The associated federal estate tax falls to roughly $2 million, and the life insurance proceeds provide their heirs a ready source of cash to pay that bill without a fire sale of company stock or real estate.

Ready to see how we can help you? Explore more success stories on our case studies page to discover proven strategies that have saved our clients thousands in taxes.

Why Most Wealthy Californians Underestimate Their Estate Tax Exposure

Talk to a room full of California entrepreneurs and long time real estate investors and you will hear the same assumptions repeated: “California does not have an estate tax so I am fine,” or “my net worth may be eight figures on paper, but so much of that is tied up in stock or buildings I am not sure it really counts.” Those beliefs are understandable, but they are wrong in ways that cost families real money.

The federal estate tax does not care whether your wealth is liquid. A $5 million house in Los Angeles and $10 million of stock in your own company are valued at their fair market value. If your estate cannot pay the tax in cash, your executor may be forced to sell assets quickly. For business owners, that can mean selling shares at a discount or accepting unfavorable buyout terms just to cover a tax bill.

There is another misconception that because various bills like OBBBA have cut certain federal taxes, Washington is suddenly friendlier to wealth. The actual pattern has been more nuanced. Income tax cuts in one area have been paired with talk of tougher enforcement, wealth taxes at the state level, and the automatic sunset of estate tax relief unless Congress acts. None of this is reason to panic, but it is reason to stop assuming the current rules will last indefinitely.

Will California Add Its Own Estate or Wealth Tax?

California currently does not levy its own estate or inheritance tax. That is why some high net worth families elsewhere in the country still view California as less hostile to generational transfer than certain East Coast states that retain separate estate taxes with relatively low exemptions. But that picture is changing.

Recent proposals like the Billionaire Tax Act, which would impose a one time levy on billionaire net worth, tell you where the political energy is. While that specific measure focuses on the ultra rich, it would establish legal and administrative machinery for net worth based taxation in California. Voters are also being asked to consider a Retirement and Personal Savings Protection measure that would try to cabin the state’s ability to tax certain accounts or assets directly.

For families with $10 million to $100 million in net worth, the immediate move is not to move to Nevada overnight. It is to design their estate plan in a way that remains flexible if California introduces some form of wealth or inheritance tax in the future. That might mean:

• Using out of state trusts in jurisdictions with favorable trust law.
• Structuring ownership of closely held businesses so that a portion of appreciation occurs outside any potential future California wealth tax base.
• Coordinating lifetime gifts with potential changes in residency, without creating messy fights over where you were truly domiciled if California adopts retroactive rules.

Here it helps to have advisors who live and breathe both California rules and federal tax law, not just generic national commentary. Complex planning like this is exactly where a tailored engagement around tax planning services moves from “nice to have” to essential risk management.

Common Mistake That Turns a Manageable Estate Into a Tax Problem

The mistake we see most often in California is letting portfolio and real estate growth quietly push a family from “probably under the exemption” to “solidly above it,” without any changes to wills, trusts, or entity structure. This tends to happen to long time property owners in markets like Los Angeles, Orange County, and the Bay Area where a primary residence bought for $800,000 two decades ago is now worth $4 million or more.

Imagine a couple in their late 60s with the following balance sheet:

• Primary residence in Palo Alto: $5 million.
• Rental fourplex in San Diego: $3 million.
• Retirement and brokerage accounts: $6 million.
• Closely held business interest: $4 million.

They still think of themselves as the couple who stretched to buy a house under $1 million and who kept their business alive through the dot com bust. On paper, though, they have an $18 million estate. If both spouses die after the federal exemption falls in 2026 and they have done no planning beyond a simple revocable trust, it is entirely possible that $6 million to $8 million of that estate will be exposed to federal estate tax. At 40 percent, that is a $2.4 million to $3.2 million tax bill. The IRS does not care that their cost basis in the house is low or that the business is “illiquid.”

Red Flag Alert: If your net worth is over $10 million and your current estate plan is more than five years old, you are flying blind. The law has moved, your portfolio has likely grown, and the opportunity to lock in today’s higher exemption using structures like spousal lifetime access trusts and grantor retained annuity trusts will not last forever.

What If Your Net Worth Is Under the Current Exemption?

A fair question we hear from many W 2 professionals, especially dual income households in tech and medicine, is whether they really need to care about estate tax if their current net worth is well under today’s exemption. A couple in their early 40s with $4 million in assets and strong earning power can feel very far away from estate tax territory.

The right answer here is not panic; it is math. If that couple continues to save aggressively, sees their investments compound, and perhaps receives equity based compensation that appreciates, they could cross a much lower 2026 era exemption line a lot faster than they expect. A household with $500,000 of annual income that saves 25 percent of pay and earns a conservative 6 percent annual return on investments can see net worth double in roughly 12 years. Add significant stock option upside or a liquidity event and the path to $10 million plus becomes realistic, not hypothetical.

For these households, the key is to build estate planning into the broader financial plan now, so they understand trigger points for more advanced strategies. It is also wise to use tools like a simple federal tax calculator to understand how shifts in income and deductions interact with long term wealth building. The sooner you see yourself as a potential estate taxpayer, the more time you give yourself to move assets into structures that will not be hit later.

Will Acting Before 2026 Trigger an Audit?

Any time we talk about making sizable gifts, funding complex trusts, or restructuring ownership, smart clients ask whether they are painting a target on their back. The IRS absolutely does scrutinize large transfers and high income taxpayers more closely than simpler returns. That is not a reason to avoid good planning; it is a reason to do it by the book.

When you make lifetime gifts above the annual exclusion, you file a federal gift tax return, Form 709. When an estate is large enough to require an estate tax return at death, that return includes a detailed schedule of prior taxable gifts. If your team has valued assets carefully, documented transfers clearly, and coordinated with your broader tax filings, you are presenting a clean story built on existing law. Courts and the IRS have made it clear through regulations and rulings that using the higher exemption before it sunsets is legitimate planning, not a loophole to be punished later. For background, see the discussion in IRS estate and gift tax FAQs.

In practice, the audit risk you should be more concerned about is the one that comes from sloppiness: undocumented family loans that look like gifts, transfers at unrealistic valuations, or inconsistent treatment of the same asset across different filings. When we design an estate strategy around the One Big Beautiful Bill Act era rules and the coming exemption change, every move is tied back to existing IRS guidance and supported by third party valuations where appropriate.

Action Steps for High Net Worth Californians Before the Exemption Drops

If you have read this far, you likely fall into one of three buckets: a founder or investor with concentrated equity, a real estate family with significant property holdings, or a professional household whose earnings and savings have quietly built a sizable balance sheet. Here is a practical roadmap for the next 12 to 24 months.

1. Get a current, realistic net worth statement

• Update property values using credible market data, not just original purchase prices.
• Include vested and reasonably expected equity compensation.
• Factor in business interests at fair value, not book value.

2. Model your estate tax exposure under 2026 rules

• Project conservative asset growth over the next 10, 20, and 30 years.
• Apply a lower federal exemption consistent with the post 2025 reversion.
• Estimate potential estate tax using current top marginal rates.

3. Decide what you are comfortable moving out of your estate now

• Identify assets you are confident you will not need to spend personally.
• Consider trusts that still allow indirect access through a spouse or defined distribution standards.
• Use annual exclusions and valuation discounts where appropriate to stretch your exemption.

4. Coordinate income tax and estate tax planning

• Redirect some benefits from OBBBA era income tax cuts into funding trusts and insurance.
• Align charitable giving with strategies like donor advised funds or charitable remainder trusts that can also reduce estate size.
• Review how stock option exercises, liquidity events, or property sales fit into your broader transfer plan.

Key Takeaway: The One Big Beautiful Bill Act did not repeal the estate tax. It simply changed where the day to day pain shows up for many Californians. The real opportunity lies in using today’s income tax savings and high estate exemption together before the window narrows in 2026.

Book Your Estate Strategy Session

If you are a high net worth Californian wondering whether the coming exemption drop and the One Big Beautiful Bill Act era rules will leave your family writing a massive check to the IRS, now is the time to get clarity. Our team works every day with founders, real estate investors, and professionals to map out concrete moves that protect generational wealth while staying squarely within IRS and California rules. Click here to book your consultation now.

This information is current as of 5/29/2026. Tax laws change frequently. Verify updates with the IRS or FTB if reading this later.