California 1031 Exchange: The Clawback and FTB Form 3840
A 1031 exchange defers California tax the same way it defers federal tax. California adds one thing no other state adds in quite the same form: if your replacement property is outside California, you take on an annual filing obligation that lasts until the gain is finally recognized. Most California exchangers learn about it from a Franchise Tax Board notice rather than from their escrow.
Why deferral is worth more in California
California does not give capital gains a preferential rate. Gain is taxed as ordinary income at rates reaching 13.3 percent, which is the highest state rate in the country. Stacked on the federal treatment, a fully taxable sale of a long-held, heavily depreciated California property faces four separate charges:
| Charge | Rate | Applies when |
|---|---|---|
| Federal long-term capital gains | 0, 15 or 20 percent | Depends on taxable income. The 20 percent bracket is where most exchangers with meaningful appreciation land. |
| Net investment income tax | 3.8 percent | Applies above the modified adjusted gross income thresholds in IRC 1411. |
| Unrecaptured Section 1250 gain | up to 25 percent | Depreciation you deducted over the holding period is recaptured at its own rate, separate from capital gains. |
| California income tax | up to 13.3 percent | California does not have a preferential capital gains rate. Gain is taxed as ordinary income, plus the 1 percent mental health services surcharge above $1 million. |
Rates shown are the published statutory rates and are not a projection of any individual outcome. Your actual liability depends on your basis, your holding period, your depreciation schedule and your income. Confirm the numbers with your CPA.
The practical consequence is that the same deferral is simply worth more to a California owner than to an owner in a state with no income tax. It is also why the decision is rarely about whether to exchange and almost always about what to exchange into and whether the deadlines can be met.
California conforms to Section 1031
The mechanics are the same. Proceeds go to a qualified intermediary and never to you. You have 45 days to identify and 180 days to close. The same identification rules apply, and the same rule that a missed deadline ends the exchange applies. If you are exchanging California property for California property, that is essentially the whole story at state level.
The clawback: Revenue and Taxation Code 18032
For exchanges completed on or after January 1, 2014, California tracks deferred gain that leaves the state. If you exchange California property for replacement property located elsewhere, the California-source portion of the deferred gain stays within California's reach and becomes taxable by California in the year that gain is eventually recognized.
This is worth stating precisely, because it is widely misunderstood in both directions. California is not taxing you now. The deferral is genuine, and you owe nothing to the state at the time of the exchange. What California is doing is recording a claim on the appreciation that accrued while the property sat in California, so that when you finally cash out, in Texas or Nevada or anywhere else, that portion is still California-source income.
FTB Form 3840, and why it is not a one-time form
The mechanism California uses to keep track is FTB Form 3840, California Like-Kind Exchanges. The pattern that catches people out is the filing cadence:
- You file Form 3840 with your California return for the year of the exchange.
- You file it again every subsequent year, as an information return, reporting that the deferred gain is still deferred.
- You keep filing until the deferred gain is recognized in a taxable disposition, or is otherwise eliminated.
- The obligation does not end when you leave California. It follows the gain, not your residency.
- If you exchange again into another property, the deferral, and the filing, carries forward to the new property.
An owner who exchanges out of a California building at 55 and holds the replacement property until 80 files that form twenty-five times. It is a small annual task, and it is the one most likely to be quietly dropped when a CPA changes, at which point the FTB may estimate the deferred gain itself and propose an assessment. Tell whoever prepares your return that the obligation exists, in writing, the year you do the exchange.
How this interacts with a DST
Sponsors assemble Delaware Statutory Trust programs nationally, so a California exchanger frequently ends up holding an interest in property in another state. That triggers Form 3840 exactly as a direct out-of-state purchase would. It is a reporting consequence to plan for, not a reason to restrict yourself to California property, and narrowing an identification list to one state inside a 45-day window is its own risk.
Two points are worth raising with your CPA before you identify, rather than after:
- Whether any of your candidate replacement properties are California-situated, which would avoid the filing entirely.
- How the deferred California-source gain will be reported if you later divide a single exchange across several DSTs in several states.
Where the California exchanger usually gets stuck
- Engaging the intermediary too late. The qualified intermediary must be in place before the relinquished property closes. Escrow will not always raise it.
- Assuming the CPA knows. Form 3840 is not generated automatically by the federal exchange reporting. It has to be affirmatively added.
- Underestimating the debt replacement. Deferring the full gain means replacing both the value and the debt that was retired. The shortfall is boot, and in California the tax on that boot is at ordinary rates.
- Closing in the fourth quarter without filing an extension. The exchange period is the earlier of 180 days or the return due date including extensions, so a late-year close without an extension shortens the window.
California exchange questions, answered
Does California recognize a 1031 exchange?
Yes. California conforms to Internal Revenue Code Section 1031, so a properly structured exchange defers California tax as well as federal tax. The 45-day and 180-day deadlines, the qualified intermediary requirement and the identification rules all apply the same way. What California adds is a reporting obligation when the replacement property is outside the state.
What is the California clawback?
Revenue and Taxation Code Section 18032, effective for exchanges completed on or after January 1, 2014, provides that when a California taxpayer exchanges California property for replacement property located outside California, the California-source portion of the deferred gain remains subject to California tax when that gain is eventually recognized. The deferral is real, but California keeps its claim on the gain that accrued while the property was in California.
What is FTB Form 3840 and when do I have to file it?
FTB Form 3840, California Like-Kind Exchanges, is the information return that tracks a deferred California-source gain. You file it with your California return for the year of the exchange and for every year afterward, until the deferred gain is recognized in a taxable disposition or otherwise eliminated. It is not a one-time form. It is an annual obligation that can run for decades.
What happens if I stop filing Form 3840?
The Franchise Tax Board may estimate the deferred gain and issue a notice of proposed assessment based on the information it has, and interest runs from the original due date. Because the form is the FTB's only visibility into the deferral, a gap in filing is the event most likely to trigger correspondence. If you have missed years, this is a question for a California CPA rather than something to leave alone.
Do I still file Form 3840 if I move out of California?
Yes. The obligation follows the deferred California-source gain, not your residency. Leaving California does not extinguish the state's claim on gain that accrued while the property was located there, and the annual filing requirement continues.
Does the clawback apply if my replacement property is also in California?
No. Form 3840 is required when California property is exchanged for property outside California. An exchange of California property for California property does not create the filing obligation, though the exchange itself is still reported on your federal return on Form 8824.
Are DST properties located in California?
Some are, many are not. Sponsors assemble programs nationally, so a California exchanger frequently ends up with replacement property in another state, which triggers the Form 3840 obligation. This is a compliance consideration to plan for with your CPA, not a reason to avoid out-of-state property. The filing is an information return, not a tax payment.
What happens to the deferred gain if I hold until death?
Under current federal law, assets held at death generally receive a step-up in basis to fair market value under IRC 1014, and the deferred gain is not recognized by the estate. This is the reason many exchangers describe the strategy as exchange until you expire. Estate treatment is specific to your circumstances and is a question for your estate attorney and CPA, not one to plan around from a web page.
Sources
- California Revenue and Taxation Code Section 18032, on like-kind exchanges of California property for out-of-state property.
- California Franchise Tax Board Form 3840, California Like-Kind Exchanges, and its instructions.
- Internal Revenue Code Sections 1031, 1411 and 1014, and Treasury Regulation 1.1031(k)-1.
- IRS Form 8824, Like-Kind Exchanges.
This page is general information about tax law, not tax advice, and no part of it is a recommendation of any security or investment. Every exchange turns on facts specific to the taxpayer. Consult your own CPA or tax attorney before acting.