Mello-Roos is a special California property tax charged inside a defined Community Facilities District to repay bonds that funded local infrastructure and services such as schools, roads, utilities, parks, police, and fire protection. It appears as a separate line on your annual property tax bill, sits on top of your regular one-percent property tax, and typically adds a few hundred to several thousand dollars per year depending on the district. The charge runs for the life of the bonds, often 20 to 25 years, and transfers to the next owner when the property is sold.
Why California Has This Extra Tax
Mello-Roos exists because of Proposition 13. California voters passed Proposition 13 in 1978, capping property tax rates at one percent of assessed value and limiting annual assessment increases to two percent until a property changes hands. That cap starved cities, counties, and school districts of the revenue they had been using to build infrastructure for new neighborhoods.
The Mello-Roos Community Facilities Act of 1982 gave local agencies a workaround. A city, county, or school district can create a Community Facilities District (CFD), issue bonds to pay for public improvements upfront, and levy a special tax on property owners inside the district to repay the debt.1California Legislative Information. California Government Code 53311 Because the tax is voter-approved at the time the district forms, it is not subject to the Proposition 13 one-percent cap. You find these districts most often in newer suburban developments where streets, sewers, schools, and parks had to be built from scratch.
What Mello-Roos Pays For
Money collected inside a CFD is earmarked for the specific improvements and services identified when the district was formed. It cannot be rolled into the city or county general fund. Spending falls into two categories.
Capital facilities include elementary and secondary school construction, streets and highway interchanges, sewer, water and drainage systems, and community buildings such as libraries, parks, and museums.
Ongoing services the district can fund include police protection and fire suppression, maintenance and lighting of parks, parkways, streets, and open space, storm drainage operation, snow removal, sandstorm protection, and the removal or remediation of hazardous substances.2California Legislative Information. California Government Code 53313
How the Tax Is Calculated
A Mello-Roos special tax is not based on your home’s assessed value. It is not an ad valorem tax. The dollar amount comes from a formula set when the district was formed, usually keyed to the square footage of the home, the acreage of the lot, or a flat rate per parcel. That means the charge stays predictable even when home values swing.
Actual amounts vary widely. Some homeowners pay a few hundred dollars a year; others in districts financing major schools or freeway interchanges pay several thousand. Many districts include an annual escalator, commonly capped at two percent, that allows the tax to rise each year to keep up with inflation or service costs. The maximum annual tax and the escalation rate are both disclosed in the district’s formation documents, so there is a ceiling you can see in advance. Most districts run 20 to 25 years, matching the repayment schedule of the underlying bonds.
The charge shows up on your annual secured property tax bill as a separate line item, not folded into your base property tax.
How to Know if a Home Has Mello-Roos
California law puts the burden on the seller to tell you. Under Civil Code Section 1102.6b, a seller must make a good faith effort to obtain a Notice of Special Tax from each agency levying a Mello-Roos tax on the property and deliver it to the buyer.3California Public Law. California Civil Code Section 1102.6b The agency prepares that notice under Government Code Section 53340.2, and it spells out the maximum tax amount and the scheduled termination date of the assessment.4California Legislative Information. California Government Code 53340.2
The notice has to reach you as soon as practicable before title transfers. If it does not, you can cancel the purchase agreement: three days after in-person delivery, or five days from the postmark if the notice was mailed. Most agents order a specialized disclosure report from a third-party company to confirm what CFDs, if any, affect the property.
What Happens if You Don’t Pay
Missing Mello-Roos payments is more serious than falling behind on an ordinary tax bill, because those payments secure the bonds that paid for the district’s improvements. The local agency can pursue judicial foreclosure against a delinquent property to protect bondholders.5California Legislative Information. California Government Code 53356.1
Most bond resolutions include a covenant requiring the agency to start foreclosure within 150 days after an installment goes delinquent. The action covers all delinquent taxes, interest, penalties, and fees, and if more installments come due before the property is sold under the judgment, the court can add them in. The standard five-year redemption window that applies to regular delinquent property taxes does not govern here; Mello-Roos foreclosures move on the faster timeline set by the bond covenants.
Can You Pay It Off Early?
Sometimes. A CFD can allow property owners to prepay the remaining Mello-Roos obligation in a lump sum, but only if the resolution that formed the district specifically permits it.6California Legislative Information. California Government Code 53344 A payoff quote from the administering agency will usually include the remaining principal, any redemption premium, and administrative fees.
Once you pay in full, the agency records a Notice of Cancellation of Special Tax Lien with the county recorder, and the charge drops off future tax bills. If you are selling a home inside a CFD, the right to prepay the lien as part of the sale has to be disclosed to the buyer. Whether prepayment pencils out depends on how long you plan to stay and how the lump sum compares with years of annual payments plus any escalator.
Is Mello-Roos Deductible on Your Federal Taxes?
Sometimes, and only in part. The IRS allows a deduction for state and local real property taxes that are levied for the general public welfare at a like rate against all property in the taxing jurisdiction.7Internal Revenue Service. Topic No. 503, Deductible Taxes A Mello-Roos tax can meet that standard even though it is not based on property value, because federal law does not require real property taxes to be ad valorem to qualify.
Where it gets narrower: if the tax is paying for local benefits that tend to increase the value only of the properties being taxed, such as new sewer lines or roads serving a single development, the IRS treats it as a non-deductible local benefit assessment. The portion of that assessment allocable to maintenance, repair, or interest charges stays deductible.
Even when your Mello-Roos qualifies, it counts against the overall state and local tax (SALT) deduction cap, which is $40,000 for most filers in 2026 and $20,000 for married filing separately.7Internal Revenue Service. Topic No. 503, Deductible Taxes If your state income taxes and regular property taxes already use most of that cap, the Mello-Roos deduction may add little. A tax professional can tell you how your specific district’s charge is treated.