Legal Information Notice
This guide provides general educational information about the stepped-up basis rule. It is not legal or tax advice and does not apply to every situation. Tax laws change and vary by circumstance. Consult a licensed attorney or CPA for guidance specific to your inherited property and tax situation. Reading this does not create an attorney-client relationship.
What Is a "Basis" in Tax Law?
Before understanding the stepped-up basis, it helps to understand what "basis" means in tax law. Your tax basis in a property is essentially what you paid for it — your cost. When you sell the property, you pay capital gains tax only on the difference between what you received and your basis.
Example: If you bought a home for $300,000 (your basis) and sold it for $800,000, your gain is $500,000. Capital gains tax applies to that $500,000 gain.
This is straightforward when you buy property yourself. But what happens when you inherit property — property you never purchased?
The Stepped-Up Basis Rule Explained
Under federal tax law (IRC Section 1014), when you inherit property, your cost basis is not what the original owner paid for it. Instead, your basis is "stepped up" to the fair market value of the property on the date of the decedent's death.
This is one of the most significant tax benefits in the entire U.S. tax code for heirs of appreciated property. It can eliminate decades of accumulated capital gains in a single transaction — the death of the property owner.
The Classic California Example
A parent purchased a San Francisco home in 1985 for $180,000. At death in 2024, the home is worth $2,400,000. The parent's taxable gain would have been $2,220,000 if they had sold it during their lifetime.
An heir who inherits this home receives a stepped-up basis of $2,400,000 — the current market value. If the heir sells the home for $2,400,000, there is zero capital gains tax owed.
If the heir keeps the home and sells it five years later for $2,700,000, they owe capital gains tax only on the $300,000 of gain that occurred after inheritance — not on the $2,220,000 of lifetime appreciation.
This is a simplified illustration. Actual tax calculations depend on individual circumstances including exclusions, deductions, and California state tax rules. Consult a tax professional.
How Step-Up Basis Works for Different Asset Types
Real Estate (Most Common for California Heirs)
Real property — homes, land, rental properties, commercial real estate — generally receives a full step-up to fair market value at the date of death. The value is typically established by a qualified appraisal obtained as part of the estate administration process. A proper appraisal is important: without documentation of the stepped-up value, calculating gain at later sale becomes difficult.
Stocks, Bonds, and Investment Accounts
Securities held in taxable brokerage accounts also receive a stepped-up basis. Appreciated stock a parent purchased decades ago is inherited at current market value, eliminating the embedded gain. However, assets held in tax-deferred accounts like IRAs and 401(k)s do not receive a stepped-up basis — distributions from those accounts are taxed as ordinary income regardless of when the original investments were made.
Community Property in California
California is a community property state, which provides an additional benefit: when a married person dies, both halves of community property receive a stepped-up basis — not just the deceased spouse's half. This is more favorable than the federal default rule (which steps up only the decedent's share) and is one reason California community property can be a significant estate planning asset.
| Asset Type | Step-Up at Death? | Key Notes |
|---|---|---|
| California real estate | Yes — full step-up | Requires qualified appraisal; community property gets full step-up |
| Brokerage account stocks | Yes — full step-up | Each security's basis resets to date-of-death value |
| IRA / 401(k) assets | No step-up | Distributions taxed as ordinary income; basis not relevant |
| Roth IRA | No step-up (but distributions often tax-free) | Different rules apply — consult a tax advisor |
| Business interest (LLC, partnership) | Partial / complex | Rules vary; professional guidance essential |
| Annuities | No step-up | Gain still taxed as ordinary income to beneficiary |
When Heirs Still Owe Capital Gains Tax
The stepped-up basis eliminates capital gains on appreciation that occurred before death. But heirs can still owe capital gains tax in several situations:
1. The Property Appreciates After Inheritance
If you inherit a home worth $1,000,000 (your stepped-up basis) and sell it five years later for $1,400,000, you owe capital gains tax on the $400,000 of gain that occurred during your ownership.
2. You Don't Sell Immediately — and the Market Rises
The longer you hold inherited property before selling, the more potential gain can accumulate above your stepped-up basis. Some heirs choose to sell quickly to eliminate this risk; others hold for personal reasons and accept the potential future tax exposure.
3. California State Capital Gains Tax
Unlike the federal government, California taxes capital gains as ordinary income at state rates — there is no preferential long-term capital gains rate at the state level. California's top rate is 13.3%, which can significantly add to the overall tax on a home sale. This applies even to gains from inherited property sold above the stepped-up basis.
4. The Property Was Gifted During Life, Not Inherited
This is a critical distinction. Property received as a gift during a person's lifetime does not receive a stepped-up basis — the recipient carries over the original donor's basis. Families who transfer property during life to avoid probate or for other reasons may inadvertently eliminate the stepped-up basis benefit. This is one of the most important reasons why estate planning decisions need careful tax analysis.
Stepped-Up Basis vs. Prop 19: The Tension You Need to Understand
In California, the stepped-up basis and Proposition 19 pull in different directions for many families, creating a fundamental planning tension:
- Stepped-up basis favors inheriting property at death — you eliminate embedded capital gains
- Prop 19 may cause a large property tax increase upon inheriting property at death — especially for rental or investment properties
- Lifetime gifts may preserve a lower property tax assessed value in some cases, but forfeit the stepped-up basis — leaving the heir with a large embedded capital gain
There is no universal right answer. The correct strategy depends on the property's current assessed value, market value, the heir's plans for the property, other estate assets, and family circumstances. This tradeoff is exactly the kind of analysis a California estate planning attorney and tax advisor should work through together with families who own significant real property.
The Planning Takeaway
For high-value California real estate, the stepped-up basis can be worth hundreds of thousands — or millions — of dollars in eliminated capital gains tax. Preserving it should be a central goal of estate planning for California families with significant appreciated property.
However, if preserving the step-up means triggering a large Prop 19 reassessment that dramatically increases annual property taxes, the calculation becomes more complex. An attorney and tax advisor working together can model both scenarios and help families choose the approach that makes the most sense for their specific situation.
This content is for general informational purposes only. It does not constitute legal or tax advice. Consult a licensed California attorney and CPA for guidance on your situation.
How Bay Legal PC Can Help
Understanding the stepped-up basis is an important starting point for California heirs — but applying it to a real estate sale or estate plan requires professional guidance. Bay Legal PC assists California families with estate planning, trust administration, probate, and the legal dimensions of inherited property. Free initial consultations are available throughout California.