Over the last 10 years, California homeowners have seen some of the biggest real estate gains in the country. Many homeowners might be thinking about selling their home and realizing the profits, whether they bought a home in the past and now wish to cash out, or they own an investment property that has grown dramatically in value.

Homeowners should not rejoice at the prospect of a lucrative sale until they are aware of the high price reality that California imposes on capital gains that the federal government does not.

This "capital gains mismatch" may result in a significantly higher tax liability than what many sellers are expecting. Always look for experienced professionals (like a tax lawyer for consultation) before making a final call regarding taxation.

Understanding the Mismatch

The tax treatment for long-term capital gains is generally more favorable at the federal level. Gains may be subject to tax rates lower than ordinary income, depending on your income.

In California, another way is taken.

California does not have a lower capital gains tax rate, but rather treats capital gains the same as ordinary income. This means that the state income tax rate applies to the sale of real estate, stocks, or other investments, similarly to wages and salaries.

Those rates can go up to 13.3% or higher for high-income earners and result in a higher tax burden on a profitable sale.

What Makes 2026 So Particularly Difficult?

A lot of people are finding out that they have significant unrealized gains from years of appreciation.

This could result in hundreds of thousands of dollars in taxable gain on the sale of a piece of real estate that was bought for $400,000 and sold for $1.2 million.

When combined with:

a.      Capital gains tax rates are federal.

b.      Net Investment Income Tax (NIIT)

c.       California's ordinary income tax rates

d.      The possibility of state tax bracket changes

The potential for federal tax bracket changes.

The overall tax effect can be quite significant.

Many sellers concentrate on just the selling price and do not include taxes.

Primary Residence vs Investment Property

The tax treatment differs depending on the property type.

·        Primary Residence

The federal home-sale exclusion may be applicable to many homeowners:

a.      Up to $250,000 for single filers

b.      Up to $500,000 for married couples filing a joint return

Gains in excess of these amounts may still be subject to taxes.

·        Investment Property

The primary residence exclusion normally does not apply to investment property. Therefore, without some planning, the entire gain could be subject to federal and state taxes.

Legal strategies to minimize the impact

Tax exposure can be greatly decreased with proper planning.

·        Consider a 1031 Exchange

A 1031 Exchange could potentially benefit the owner of an investment property by allowing them to delay the payment of capital gains taxes by investing the proceeds into another like-kind property.

This can help to save money and delay taxes. You can also hire an expert (like an IRS tax attorney) for some additional guidance.

Use Tax-Loss Harvesting

If the stock or other holdings are underperforming, investors could be able to sell them and realize taxable gains from their equity loss.

This strategy of tax-loss harvesting can help lower total tax liabilities during the year of a property sale.

·        Schedule the sale for the right time

The importance of the year of sale.

Retirement, other tax-planning events, and lower income in one year can help offset the tax impact of a home sale by coordinating the timing of the transaction. Homeowners can coordinate the sale with other tax-planning events—such as retirement or lower income in another year—to minimize their overall effective tax rate.

·        Track Property Improvements

Maintain records of additions, alterations, and improvements.

These costs could contribute to the property's tax base, which would lower the property's taxable gain upon sale.

Some Tips for California Homeowners

When you are listing your home:

1.      Make a federal & state tax estimate.

2.      Determine your adjusted cost basis.

3.      Do some research on 1031 Exchange eligibility in time.

4.      Analyze investments for loss harvesting.

5.      Check with a CPA prior to signing a purchase agreement.

6.      Do not rely on your gain being covered by full exclusion treatment.

Though the selling process may be lucrative in California, it can be a surprise when the state taxes capital gains. Federal rules may provide for more favorable rates and exclusions, but California's taxation of capital gains as ordinary income can have a significant impact on the actual tax cost.

When a homeowner knows this mismatch ahead of the sale, they may have time to plan their strategy from a legal standpoint to ensure they can hold onto more of their profits and not be surprised when tax season arrives.