If your California property tax bill runs well above one percent of your assessed value, the extra charges are almost always voter-approved bonds and parcel taxes on your California property tax bill. Bonds are value-based debt payments layered on top of the one percent base rate. Parcel taxes are flat charges that sit outside the base rate entirely. Each shows up as its own line item, each got there through a specific ballot measure, and each follows different rules for how it’s calculated and who can be exempt.
Why Your Bill Goes Above One Percent
Proposition 13 amended the California Constitution in 1978 to cap the base ad valorem property tax rate at one percent of full cash value. The same section carves out an exception: debt service on voter-approved bonds isn’t subject to that ceiling.1Justia Law. California Constitution Article XIII A – Tax Limitation – Section 1 When voters in your district approve a bond, the annual payments to bondholders get added to your bill as additional ad valorem charges.
Parcel taxes reach the same bill from a different direction. They aren’t calculated from property value, so the one percent cap doesn’t apply to them at all. The California Constitution classifies them as “special taxes” and sends them through a separate voter-approval track. Add the two together and most California homeowners pay noticeably more than one percent of assessed value once every line item is counted.
How General Obligation Bonds Work
A general obligation bond is backed by the full taxing power of the issuing government. The city, county, school district, or special district that issues the bond pledges to raise whatever property tax revenue is needed to repay investors. Because the resulting charge is based on assessed value, owners of higher-valued homes pay proportionally more toward each year’s debt service.
Bond revenue typically funds capital projects with long useful lives: new school buildings, library expansions, park renovations, water and sewer infrastructure. The agency sells bonds up front and then collects annual taxes from property owners to cover principal and interest over a repayment period that often runs 25 to 30 years.
The rate for a given bond changes year to year. It depends on how much debt service is due and the total assessed value of all property in the district. When district-wide assessed values rise, the rate per dollar of value can drop while still generating enough revenue. When values decline, the rate goes up. On your bill, each bond appears as its own line, usually tied to a measure number or election year.
Most general obligation bonds require two-thirds voter approval.1Justia Law. California Constitution Article XIII A – Tax Limitation – Section 1 The high threshold exists because the resulting tax is mandatory for every property owner in the district, regardless of how they voted.
The 55 Percent Rule for School Bonds
School construction bonds are the major exception. Proposition 39, approved in 2000, allows K–12 districts and community college districts to issue facility bonds with 55 percent voter approval instead of two-thirds.2California Secretary of State. Voter Information Guide – Proposition 39 The lower bar was designed to make it easier for districts to repair and modernize aging campuses.
The easier path comes with constitutional guardrails. The ballot measure must list the specific projects to be funded, and the district must certify that it evaluated safety, class size reduction, and technology needs when developing the list.1Justia Law. California Constitution Article XIII A – Tax Limitation – Section 1 Bond proceeds cannot pay teacher salaries, administrator compensation, or any other operating expense.
Once voters approve the bonds, the district must appoint a citizens’ oversight committee within 60 days and conduct both an annual independent performance audit and an annual independent financial audit until all proceeds are spent.1Justia Law. California Constitution Article XIII A – Tax Limitation – Section 1 If a district fails to appoint the oversight committee, taxpayers can go to court to block further bond spending.
How Parcel Taxes Are Different
Parcel taxes are flat-rate charges applied to each parcel of land, not calculated from property value. A district might charge every parcel the same dollar amount, or it might scale the charge to the square footage of buildings on the property. Either way, what you owe doesn’t swing with the real estate market the way a bond assessment does.
That predictability is the point. School districts commonly use parcel tax revenue for the operating expenses that Proposition 39 bond money can’t legally touch: teacher salaries, smaller class sizes, and academic programs. Cities and special districts sometimes use parcel taxes for fire and police services or emergency communications.
Parcel taxes require a two-thirds supermajority to pass, the same threshold as most general obligation bonds.3Justia Law. California Constitution Article XIII C – Voter Approval for Local Tax Levies – Section 2 Some measures also include annual inflation adjustments tied to the Consumer Price Index or a set percentage. The amount on your bill can rise each year even without a new vote.
What a New Measure Does to Your Mortgage Payment
If you pay property taxes through a mortgage escrow account, a newly approved bond or parcel tax won’t just show up on your annual tax bill. It will change your monthly mortgage payment. Federal law requires your loan servicer to run an annual escrow analysis and adjust your monthly deposit to cover the actual tax obligation.4Consumer Financial Protection Bureau. 12 CFR 1024.17 Escrow Accounts When the analysis shows a shortage, the servicer must spread the repayment over at least 12 months and send you a statement explaining the change.
The surprise catches homeowners more often than you’d think. A new school bond might add only $200 to your annual tax, but the servicer often builds in a cushion for the following year on top of that, so your monthly payment can jump by more than the bond alone suggested. Before voting on a bond measure, estimate the impact: for a bond, multiply the projected rate by your property’s assessed value; for a parcel tax, check the flat amount. Your county tax collector’s website will show the assessed value and every current levy on your parcel.
Federal Deduction Treatment
Property taxes paid to California, including voter-approved bond assessments and parcel taxes, are generally deductible on your federal return if you itemize. The catch is the cap on state and local tax deductions. For 2025, the combined deduction for state income taxes and property taxes is limited to $40,000 ($20,000 if married filing separately), with scheduled annual increases through 2029.5Internal Revenue Service. How to Update Withholding to Account for Tax Law Changes for 2025 If your California income tax alone pushes you near the cap, the property tax added by bonds and parcel taxes may deliver little or no federal benefit.
A separate rule applies to special assessments that fund capital improvements directly benefiting your property, such as a new sidewalk or a sewer line serving your parcel. The IRS treats those as additions to your property’s cost basis rather than deductible taxes.6Internal Revenue Service. Publication 530, Tax Information for Homeowners If the assessment funds maintenance or repair of existing infrastructure, it remains deductible. Most standard bond levies and parcel taxes fund district-wide projects or services, so they fall on the deductible side. If your bill includes a special assessment from a community facilities district, check the purpose before assuming you can deduct it.
Late Payment Penalties Apply to the Whole Bill
California property taxes come due in two installments. The first is due November 1 and becomes delinquent on December 10, triggering an immediate 10 percent penalty.7California Legislative Information. California Revenue and Taxation Code 2617 The second is due February 1 and becomes delinquent on April 10, with a 10 percent penalty plus a small administrative cost. Voter-approved bond assessments and parcel taxes are baked into the same installments. You can’t pay the base tax and leave the rest.
If taxes remain unpaid through June 30, the property goes into tax-defaulted status and an additional 1.5 percent per month (18 percent per year) begins accruing on the unpaid balance.8Contra Costa County. Redemption (Defaulted) Taxes Property that stays in default long enough becomes subject to sale by the county tax collector.
Senior and Disability Exemptions on Parcel Taxes
California law allows school districts to offer parcel tax exemptions for homeowners age 65 and older. Many districts also extend an exemption to people receiving Supplemental Security Income for a disability. Whether the exemption exists in your case depends on the language of the specific ballot measure that created the tax. State law permits the exemption but doesn’t require every measure to include one.
If your district offers an exemption, the application runs through the district office, typically the school district, not the county assessor. You’ll generally need proof of age such as a government-issued ID, proof that you live on the property, and a copy of your current tax bill showing the parcel number. Filing deadlines vary. Many districts set a cutoff around late spring or early summer for the upcoming tax year.
Once approved, the exemption usually stays in place as long as you remain on the property. Some districts require an annual renewal, others keep it active until you sell or move. Apply as soon as you qualify. Retroactive refunds for years you could have claimed but didn’t are rare. Check your district’s website or call the business office for the specific form and deadline.