Mello-Roos is a special California property tax charged to homes inside a Community Facilities District (CFD), used to repay bonds that funded local infrastructure like schools, roads, and sewers, and sometimes to pay for ongoing public services. It isn’t based on your home’s market value. Instead, it’s a flat annual assessment calculated from physical characteristics like square footage or lot size, and it typically runs 20 to 40 years. For many California homeowners, it adds thousands of dollars a year on top of the regular 1% property tax.
What the Tax Pays For
CFDs fund two different kinds of spending, and your bill may cover one or both.
The first is capital infrastructure. Bond proceeds build the schools, roads, parks, water lines, and sewer systems a new community needs. These are one-time construction costs, and the portion of your tax that services that debt ends once the bonds are paid off.
The second is ongoing services. California law specifically authorizes CFDs to fund police protection, fire and ambulance response, recreation programs, library services, school site maintenance, and the operation of museums and cultural facilities.1California Legislative Information. California Government Code 53313 A service-related charge can continue indefinitely, even after the bond debt is retired, because those costs don’t end when construction wraps up. If you’re buying in a newer subdivision, the formation documents will tell you which bucket your CFD falls into.
How the Bill Is Calculated
Regular California property tax is ad valorem: a percentage of assessed value. Mello-Roos works differently. The formula is set when the district forms, and it usually relies on physical characteristics rather than market price. Two homes on the same street with identical sale prices can carry very different Mello-Roos bills if one has a larger lot or more square footage.
Common inputs include home square footage, lot size, and land-use category (single-family versus multi-family, for example). Each CFD adopts its own “Rate and Method of Apportionment,” a document that spells out the formula and sets two numbers worth knowing: the maximum special tax that can ever be levied against your parcel, and the maximum annual percentage increase. Formation documents commonly cap annual escalation somewhere between 2% and 4%, though each district picks its own figure.
In any given year, the district may levy less than the maximum, depending on what the bonds and administrative costs actually require. The charge appears as a separate line item on your annual county property tax bill, alongside the standard 1% ad valorem tax.
How Long You’ll Pay and Whether You Can Pay It Off Early
Most CFDs structure their bond debt over 20 to 40 years.2California State Treasurer. Mello-Roos Bonds Community Facilities Districts When the bonds are repaid, the debt-service portion of the tax ends. If your district also funds services, a smaller charge may continue past that date. The formation documents list the final bond maturity and whether any service tax survives.
Some districts let homeowners prepay their share of the remaining bond debt in a lump sum. Prepayment ends the annual tax going forward, except any service component, and can make the home easier to sell later. To get a payoff quote, contact the agency listed in the “Special Assessment Charges” section of your tax bill. The quote typically includes remaining principal, accrued interest, and an administrative fee. Prepayment pays off only if you stay in the home long enough to recoup the upfront cost through annual savings, so run the break-even math first.
What Buyers Should See Before Signing
California law requires sellers to give buyers a written Mello-Roos notice when a property is inside a CFD. Under Civil Code Section 1102.6b, the disclosure must include the name of the CFD, the current annual tax amount, the maximum tax that can be levied in any year, the annual percentage by which that maximum can increase, the date the tax expires, and a contact phone number for the levying agency.3California Legislative Information. California Civil Code 1102.6b Sellers can deliver it directly through the levying agency or through a private disclosure company, and it often arrives bundled with the Natural Hazard Disclosure report.
If the disclosure reaches you after you’ve already signed the purchase agreement, you have a statutory right to walk away. California Civil Code Section 1102.3 gives you three days after in-person delivery, or five days after the disclosure is deposited in the mail, to terminate the contract by delivering written notice to the seller or seller’s agent.4State of California Department of Real Estate. Disclosures in Real Property Transactions No penalty, no forfeited deposit.
Ask for the disclosure before making an offer if you can. Seeing the current bill, the ceiling, and the expiration date up front lets you factor the tax into your price and your budget rather than discovering a $5,000 annual charge during a three-day rescission window.
How It Affects Your Mortgage Qualification
Lenders treat Mello-Roos as part of your housing expense when they calculate your debt-to-income ratio. Both Fannie Mae and Freddie Mac require the special tax to be added to your monthly obligations for qualifying. On a home with $4,000 in annual Mello-Roos taxes, that’s an extra $333 a month counted against your borrowing capacity, which can translate to $40,000 or more in lost purchasing power depending on interest rates.
Lenders also escrow the charge alongside your regular property taxes, so your monthly mortgage payment reflects the full amount. If you’re shopping in a CFD community, ask your loan officer to re-run qualification numbers with the Mello-Roos included before you fall in love with a listing.
What Happens If You Fall Behind
A Mello-Roos assessment creates a lien against your property with the same priority as regular property taxes. Falling behind triggers consequences more severe than most homeowners expect. The district can pursue judicial foreclosure, asking a court to order the sale of the home to recover the unpaid taxes.
The timeline is unusually fast. After a court judgment, notice of sale can be given as soon as 20 days after the notice of levy is served on the property owner, with the sale itself following just 10 days later.5California Legislative Information. California Government Code 53356.5 Because the lien attaches to the property rather than to you personally, your mortgage lender has a stake too and will typically advance the payment to protect its collateral, then come after you for reimbursement.
Deductibility on Federal Taxes
Many homeowners assume Mello-Roos is deductible the same way regular property taxes are. It usually isn’t. The IRS distinguishes between general real estate taxes (deductible) and assessments for local benefits that increase your property’s value (not deductible). New roads, schools, and sewer systems fall into the non-deductible category.6Internal Revenue Service. Publication 530 (2025), Tax Information for Homeowners
A narrow exception exists: if part of your assessment covers maintenance, repair, or interest charges tied to those improvements, that portion can be deducted. You need to identify and document the deductible share, though. If you can’t break out how much of your bill goes toward maintenance versus new construction, the IRS treats none of it as deductible.6Internal Revenue Service. Publication 530 (2025), Tax Information for Homeowners CFDs that fund ongoing services like fire protection or school site maintenance may produce a clearer case for a partial deduction. Even then, the federal cap on state and local tax deductions still applies, and most California homeowners already hit it with regular property taxes and state income taxes alone, so the practical federal benefit is often zero. Check with a tax professional before claiming anything.