Refinancing does not affect property taxes in California, as long as the people on title stay the same. State law treats a new deed of trust as a lender’s security interest, not a transfer of ownership, so your Proposition 13-protected assessed value carries over untouched. The tax risk shows up only when the refinance is used as an occasion to change who holds title, which can reset your tax base to current market value.
Why the Refinance Itself Is Safe
Under Proposition 13, your property’s assessed value is locked to its fair market value on the date you bought it, and the county assessor can raise that base year value by no more than 2 percent a year. Your general tax rate is 1 percent of the assessed value, plus voter-approved local bonds.1California State Board of Equalization. California Property Tax: An Overview The only events that break that lock and reset your value to today’s market price are a change in ownership or new construction.
A refinance is neither. When you refinance, you sign a new promissory note and record a new deed of trust that gives the lender a lien so they can foreclose if you stop paying. It does not give the lender ownership of your home. California’s Revenue and Taxation Code says outright that the creation, termination, or reconveyance of a security interest is not a change in ownership, and the same exclusion covers substituting a trustee under the security instrument.2California Legislative Information. California Code RTC 62
You keep every economic right that matters: you live in the home, collect any rental income, make improvements, and pocket the equity when you sell. That’s why the type of refinance doesn’t change the answer. Rate-and-term, cash-out, conventional, FHA — all get the same treatment. What matters is whether the names on title changed.
When a Refinance Can Trigger Reassessment
The danger isn’t the loan. It’s what happens to title during the process. Lenders sometimes require vesting changes as a condition of financing, and homeowners sometimes use the refinance as a convenient moment to restructure ownership. Either can cost you your Proposition 13 base.
Adding or Removing Owners
If you add a co-owner who doesn’t qualify for a statutory exclusion, the assessor treats the transferred percentage as a change in ownership. That portion gets reassessed to current market value; your remaining interest keeps its old base year value. Removing an owner creates the same issue in reverse if the departing owner isn’t covered by an exclusion.
Moving the Property Into an LLC or Other Entity
Commercial lenders sometimes require the borrower to hold the property in an LLC. Moving your property into an LLC, corporation, or partnership can trigger a full reassessment to current market value unless proportional ownership stays identical before and after the transfer.3California State Board of Equalization. Frequently Asked Questions Change in Ownership
Even a transfer structured correctly at the outset can blow up later. When any person or entity acquires more than 50 percent of the ownership interests in a legal entity, every piece of real property that entity owns is deemed to have changed hands and gets reassessed.4California Legislative Information. California Code RTC 64 The threshold applies to voting stock in a corporation and to capital and profits interests in a partnership or LLC. Crossing it by a single percentage point is enough.
Title Changes That Stay Exempt
Not every title adjustment during a refinance is a problem. Several statutory exclusions cover the most common ones.
- Transfers between spouses or California-registered domestic partners are fully exempt, including adding a spouse to the deed and transfers connected to a divorce.5California Legislative Information. California Code RTC 63
- Moving property into a revocable living trust is excluded, as long as the person transferring the property is either the present beneficiary or retains the power to revoke. Transferring back out to the original owner is also excluded.2California Legislative Information. California Code RTC 62
- Adding someone to title solely as a co-signer required by the lender, where no actual ownership interest transfers, falls under a financing-purposes-only exclusion.3California State Board of Equalization. Frequently Asked Questions Change in Ownership
- Parent-child transfers still qualify for an exclusion after Proposition 19, but a much narrower one. A parent can transfer a primary residence to a child only if the child uses it as their own primary residence within one year and files for the homeowners’ exemption. The exclusion is capped at the property’s factored base year value plus an inflation-adjusted amount (currently $1,044,586 for transfers through February 15, 2027); anything above that cap gets reassessed. Grandparent-to-grandchild transfers follow the same rules and only qualify if the grandchild’s parent is deceased.6California State Board of Equalization. Proposition 19 Fact Sheet
The problems arise with non-exempt parties: unmarried partners, friends, business partners, investors, or irrevocable trusts with multiple beneficiaries.
What Reassessment Actually Costs
If the assessor determines a change in ownership occurred, the property gets a new base year value equal to its fair market value on the date of the transfer, using comparable sales and standard appraisal methods. Your old protected value is gone, and the 2 percent annual cap resets from the new figure.
How much that stings depends on how long you’ve owned the property. A home bought two years ago won’t move much. A home bought in 1990 with a protected assessed value of $250,000 that’s now worth $1.2 million would see its tax base nearly quintuple.
Reassessment also doesn’t wait for the next annual cycle. The assessor issues a supplemental assessment covering the period from the first day of the month after the ownership change through the end of the fiscal year on June 30, prorated for the months remaining.7California State Board of Equalization. Supplemental Assessment You continue receiving your regular annual tax bill separately, and both have to be paid on their own due dates.
Fixing an Accidental Reassessment
If a title change during your refinance inadvertently triggered a reassessment, you may be able to undo it through a mutual rescission. This involves recording a new deed transferring the property back to the original owner and submitting a declaration to the assessor’s office stating that both parties agree to reverse the original transfer. All parties must be restored to their prior positions, meaning any consideration exchanged has to be returned.8Los Angeles County Assessor. Change In Ownership – Rescission
The concept is simple; the execution isn’t. A poorly drafted rescission deed can itself be treated as a new transfer, stacking a second reassessment on top of the first. California law doesn’t set a hard deadline for mutual rescission, but acting quickly strengthens your case. If the assessor won’t accept a mutual rescission, the remaining route is a court-ordered rescission through a lawsuit or petition. This is a situation where consulting a property tax attorney before recording anything is worth the cost.
The Federal Deduction Question
Property tax is a state and local matter, but refinancing does affect what you can deduct on your federal return, so it’s worth separating the two.
You can deduct interest on up to $750,000 of mortgage debt used to buy, build, or substantially improve your home ($375,000 if married filing separately), a limit the One Big Beautiful Bill Act made permanent.9Internal Revenue Service. Publication 936, Home Mortgage Interest Deduction In a cash-out refinance, only the portion that replaces your old principal counts as acquisition debt. Interest on the extra cash is deductible only if you used those funds to substantially improve the home securing the loan. Pay off credit cards or buy a car with it, and that share of the interest isn’t deductible.
Points paid on a refinance generally can’t be deducted in full the year you pay them. You spread the deduction ratably over the life of the new loan.10Internal Revenue Service. Topic No. 504, Home Mortgage Points The exception is when part of the refinance proceeds go to improving your primary residence: the share of points attributable to the improvement portion may be deductible in the year paid if you meet the standard tests and paid with your own funds. And if you’re refinancing a loan you already refinanced once before, deduct any remaining unamortized points from the prior loan in the year you refinance again.