What Are Mello-Roos Taxes and How Do They Work?

Mello-Roos taxes are special California property taxes charged on homes located inside a Community Facilities District (CFD), used by local agencies to pay for infrastructure and public services that benefit properties within the district. They appear on your annual county property tax bill on top of the standard one-percent base rate, but they are calculated by a fixed formula rather than by your home’s market value. The legal basis is the Mello-Roos Community Facilities Act of 1982, codified in California Government Code beginning at Section 53311.¹ They are common in newer developments and can add hundreds to several thousand dollars to a homeowner’s yearly tax bill.

What the Tax Pays For

A CFD can fund two broad categories: capital projects and ongoing services. On the capital side, the money typically pays for streets, water and sewer systems, drainage, and electrical infrastructure.² School facilities are another common use, along with parks, libraries, and museums.³

The law also allows a CFD to fund services on a continuing basis, including police and fire protection, ambulance service, and park maintenance.³ A given district might levy taxes for capital, for services, or for both. That split matters later, because it changes whether you can pay the tax off early and whether it ever expires.

How the Amount Is Calculated

Regular California property tax is ad valorem, meaning it moves with your home’s assessed value. Mello-Roos does not work that way. Each CFD adopts a Rate and Method of Apportionment that sets the formula for how much every parcel owes.⁴ Common variables include:

Living area, so a larger home pays more than a smaller one in the same district.
Lot size, with bigger parcels sometimes carrying a higher share.
Land use, with residential, commercial, and undeveloped parcels taxed at different rates.

Most districts build in an annual escalator, often two percent, though the specific index and cap vary. The tax can never exceed the maximum rate written into the formation documents.⁴ Because the amount is not tied to market value, it doesn’t climb when home prices rise, and it doesn’t drop when they fall.

One practical consequence: there is no meaningful appeal. A standard property tax appeal challenges the assessor’s opinion of value, but a Mello-Roos charge is a formula applied to your parcel. Your only real check is to confirm the district applied the formula correctly.

How It Shows Up and Gets Collected

Mello-Roos taxes appear as separate line items on the annual county property tax bill, listed under special taxes or special assessments and usually identified by a specific CFD number.⁵ Collection runs through the county tax collector alongside your regular taxes, so everything is billed together.

Delinquency is where the treatment turns harsher than for regular property taxes. If Mello-Roos taxes go unpaid for more than 90 days, the CFD has the right, and if bonds are outstanding often the obligation, to start judicial foreclosure on the property.⁶ Delinquent ad valorem taxes, by contrast, sit through a five-year waiting period before the county can sell the property. Penalties and collection costs get added to the balance, so falling behind gets expensive quickly.

Are Mello-Roos Taxes Deductible?

Most of the time, no. The Internal Revenue Code disallows deductions for taxes assessed against local benefits that tend to increase property value, and infrastructure like new roads, sewers, and schools falls squarely into that category.⁷

There is a narrow exception. If you can show that part of your Mello-Roos tax covers maintenance, repair, or interest charges rather than capital improvements, that portion may be deductible.⁷ The burden of proving the allocation is on you, and the CFD administrator has to provide the breakdown. Any deductible portion still falls under the state and local tax deduction, capped at $10,000 for 2026.⁸ Between the general rule and the SALT cap, most California homeowners get little or no federal benefit from these payments.

What It Means When You’re Buying or Selling

California law requires sellers to disclose Mello-Roos taxes before the sale closes. Under Civil Code Section 1102.6b, the seller must make a good-faith effort to obtain and deliver a Notice of Special Tax from the taxing agency, which spells out the maximum rate, the expected duration of the tax, and what the money is used for.⁹ The agency can charge for producing the notice, but no more than $10.

Timing matters. The notice is meant to be delivered during escrow, and if a buyer does not receive it before signing the purchase agreement, the buyer has a right to rescind, three days after personal delivery or five days after delivery by mail. Third-party disclosure companies often include Mello-Roos information in their property tax reports, which can give you an early look during the home search, but those reports are not a substitute for the statutory notice.

The tax also affects how much house you can borrow against. Lenders include Mello-Roos in your qualifying housing expense along with principal, interest, property taxes, and insurance when they compute your debt-to-income ratio.¹⁰ A $3,000 annual CFD tax adds $250 per month to that calculation, which reduces the maximum loan you can carry. On the appraisal side, Fannie Mae requires lenders to determine whether a property sits within a CFD and requires appraisers to give special consideration to how the tax affects value and marketability.¹¹ Ask about the annual Mello-Roos figure early so your lender can build it into your preapproval.

How Long the Tax Lasts

Mello-Roos taxes are temporary, at least on the capital side. The bond-related portion lasts as long as the underlying bonds remain outstanding, and CFD bonds typically carry maturities of 25 to 30 years, though individual districts can set shorter or longer terms.¹² Once the bonds are paid off, the facilities portion ends and the lien is removed from the property. The expected end date is in the district’s formation documents, or the CFD administrator can tell you.

If a district refinances its bonds to capture lower rates, the refunding cannot push the maturity date beyond what was originally planned.¹³ The services portion of the tax is different. If your CFD funds ongoing police, fire, or park maintenance, that portion doesn’t expire when the bonds are retired and can continue as long as the district remains active.

Can You Pay It Off Early?

Sometimes. If your CFD taxes fund capital improvements, California Government Code Section 53344 provides a mechanism to prepay your share of the outstanding bonds and have the lien removed through a recorded Notice of Cancellation of Special Tax Lien.¹⁴ Several limits apply in practice:

Only the facilities portion qualifies. Services taxes cannot be prepaid and will keep appearing on your bill.¹⁵
Nonrefundable administrative fees, typically several hundred dollars, are charged just to run the payoff calculation.
Many districts refuse prepayment requests between June 1 and September 30 while tax rolls are being prepared.¹⁵
Your account has to be current. Any delinquent taxes, penalties, or interest disqualify the parcel until they are cleared.

The payoff itself includes your proportional share of the remaining bond principal, accrued interest, and a call premium. Exact costs and procedures vary significantly between districts, so start with the CFD administrator or the district’s special tax consultant listed in your formation documents.

1
Justia. California Government Code Chapter 2.5 – The Mello-Roos Community Facilities Act of 1982
2
Southern California Association of Governments. Mello-Roos Community Facilities District
3
Merced County, CA – Official Website. Mello-Roos
4
City of Marina Municipal Code. 3.32.030 Rate and Method of Apportionment of the Special Tax
5
California State Board of Equalization. California Property Tax: An Overview
6
Orange County Grand Jury. Mello-Roos: Perpetual Debt Accumulation and Tax Assessment Obligation
7
Office of the Law Revision Counsel. 26 U.S. Code 164 – Taxes
8
Internal Revenue Service. Topic No. 503, Deductible Taxes
9
California Legislative Information. California Civil Code 1102.6b
10
Fannie Mae. Debt-to-Income Ratios
11
Fannie Mae. Special Assessment or Community Facilities Districts Appraisal Requirements
12
City of Dublin. Community Facilities District FAQ
13
California Debt and Investment Advisory Commission. California Mello-Roos Community Facilities Districts Yearly Fiscal Status Reports
14
California Legislative Information. California Government Code 53344
15
City of Beaumont. CFD Prepayments Steps