How to Avoid Capital Gains Tax Through Estate Planning in California
March 29, 2026

What Is Capital Gains Tax?
Capital gains tax applies when you sell an asset for more than you originally paid for it. The difference between your purchase price (called your “cost basis”) and the sale price is your capital gain, and the IRS wants its share.
There are two types of capital gains:
- Short-term capital gains apply to assets held for less than one year and are taxed at your ordinary income tax rate (up to 37% federally).
- Long-term capital gains apply to assets held for more than one year and are taxed at preferential rates of 0%, 15%, or 20%, depending on your income.
For California residents, the tax burden gets steeper. The state taxes all capital gains as ordinary income at rates up to 13.3%, one of the highest state tax rates in the country. Combined with federal rates and the 3.8% Net Investment Income Tax (NIIT) for high earners, California families can lose 33% to 37% of their gains to taxes.
For homeowners in Central California, where property values in Clovis, Madera, and Solvang have appreciated significantly over the past several decades, the potential capital gains tax on inherited or long-held real estate can easily reach six figures.
The Step-Up in Basis: Your Most Powerful Tax Planning Tool
The single most effective way to minimize capital gains tax through estate planning is the step-up in basis. Under Internal Revenue Code §1014, when a person passes away, the cost basis of their assets is “stepped up” to the fair market value on the date of death.
This means that all the appreciation that occurred during the original owner’s lifetime is effectively erased for tax purposes.
Example: Suppose your parents purchased a home in Clovis for $150,000 in 1990. By the time of their passing, the home is worth $750,000. Without a step-up in basis, selling the home would result in $600,000 of taxable capital gains. With the step-up, the heir’s new cost basis becomes $750,000. If the heir sells the property shortly afterward for $750,000, the taxable gain is zero.
The step-up in basis applies to most capital assets, including:
- Real estate (primary homes, rental properties, vacant land)
- Stocks, bonds, and mutual funds
- Business interests and partnerships
- Collectibles and artwork
Notably, retirement accounts such as IRAs and 401(k)s do not receive a step-up in basis. These accounts are taxed as ordinary income when distributed to beneficiaries, regardless of when the original owner acquired them. If your estate includes both appreciated real property and retirement accounts, understanding which assets receive a step-up is critical for effective tax planning. Learn more about how retirement income is taxed in our guide to California Social Security taxation.

Revocable Living Trusts and Capital Gains
A revocable living trust is one of the most widely used estate planning tools in California, and for good reason. While a revocable trust does not provide any capital gains tax advantages by itself during your lifetime, it plays a critical role in preserving the step-up in basis for your heirs.
Here is why this matters:
- Assets in a revocable trust qualify for the full step-up in basis at the grantor’s death, just as if they were held outright. The IRS treats revocable trust assets as part of the decedent’s estate for tax purposes (IRC §2038).
- Avoids probate delays. California probate typically takes 12 to 18 months. During that time, heirs may be unable to sell or refinance inherited property. A properly funded trust allows the successor trustee to act immediately, selling assets while the stepped-up basis is still close to market value.
- Provides clear documentation. A well-drafted trust establishes a clear chain of ownership, making it easier to prove the stepped-up basis to the IRS if the property is later sold.
The key distinction is between revocable and irrevocable trusts. Assets in a revocable trust are included in the grantor’s taxable estate, which means they receive the step-up. Assets transferred to most irrevocable trusts are removed from the grantor’s estate, which means they may not receive a step-up in basis. This is one of the most common and costly mistakes families make.
California’s Community Property Advantage: The Double Step-Up
California is a community property state, and this provides a significant capital gains tax advantage that many families overlook. When one spouse passes away, both halves of community property receive a step-up in basis, not just the deceased spouse’s share.
This is often called the “double step-up,” and it is unique to community property states like California.
Example: A married couple in Madera purchased a home together for $200,000. When one spouse passes away, the home is worth $800,000. In a common law state, only the deceased spouse’s half ($100,000 basis on $400,000 value) would receive a step-up. The surviving spouse’s half would retain its original $100,000 basis. But in California, the entire property receives a step-up to $800,000, meaning the surviving spouse could sell the home with zero capital gains.
To preserve this advantage, married couples should:
- Ensure that property is properly characterized as community property in their estate plan
- Avoid converting community property to joint tenancy, which only provides a step-up on the deceased spouse’s half
- Consider a community property agreement or community property trust to clearly establish the property’s character

Proposition 19 and Property Tax Considerations
Many California families confuse capital gains tax basis with property tax assessed value. These are two separate concepts governed by different laws.
The step-up in basis under IRC §1014 affects your federal and state income tax when you sell an inherited asset. Proposition 19, which took effect on February 16, 2021, affects your annual property tax assessment.
Under Prop 19:
- The parent-to-child transfer exclusion is limited to a primary residence that the child uses as their own primary residence
- There is a cap on the exempted assessed value difference (the greater of $1 million or the current assessed value)
- Investment and rental properties transferred from parents to children will be reassessed to current market value
This means an heir can receive a full step-up in basis (eliminating capital gains) while simultaneously facing a property tax reassessment that dramatically increases their annual property tax bill. Understanding both implications is essential for making informed decisions about whether to sell or keep inherited property.
California families in Clovis, Madera, and Solvang should work with an estate planning attorney who understands both the federal income tax implications and California’s property tax transfer rules under Proposition 19.
For families holding highly appreciated assets like stocks or real estate, a charitable remainder trust is another strategy worth considering. A CRT lets you contribute appreciated property to an irrevocable trust, avoid the upfront capital gains tax, and receive an income stream for life or a set term of years. The remaining assets then pass to a charity you choose.
Common Mistakes That Trigger Unnecessary Capital Gains Tax
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