Taxman Is Knocking In Napa County

NAPA VALLEY, CA — It's that time of year in Napa County — and we're not talking about the holiday season.

Instead, property owners are reminded that the first installment of property taxes becomes delinquent if not paid by Wednesday (Dec. 10, 2025) and the second installment will be delinquent if not paid by April 10, 2026.

Late payments will incur a 10 percent penalty. In addition, an administrative cost will be added on late second installment payments, according to the county.

The pocketbook pain is real, but the county said it is making it as quick and easy as possible for residents to meet their property tax obligations.

View and pay your property tax bill, set up monthly payments, and update your address on the Napa County How-To website. For more details, call 707-253-4312 or toll free 877-279-2987.

Property taxes can be paid online, by phone, by mail, and in person at 1195 Third St., Suite 108, Napa, 8 a.m.-5 p.m. weekdays (except holidays). Bring your tax bill, parcel number, or, if you don't have the parcel number, the address of the property being taxed.

Tax payments can also be put in a drop box, located outside the main entrance to the office at 1195 Third St. The box is emptied at 5:00 p.m. every business day, and payments are processed the following business day. Drop-off payments must be received prior to 5:00 p.m. on the day that they are due or they will be considered delinquent. Do not include cash.

Make checks and money orders payable to the Napa County Tax Collector and write the Fee Parcel Number on them. The canceled check or money order stub serves as the receipt. Never send cash.
Mail payments early so that the envelope is postmarked before the delinquent date. A postmark date and time is acceptable proof of timely payment in Napa County.

Mailed-in payments should be addressed to the appropriate address with the required information including an APN number. Check with the Treasurer's office for more information.

To make payments by telephone, call 1-855-627-2121. The payment processing company charges a 2.32 percent transaction fee for credit or debit card payments, but no transaction fee for E-check payments.

Not receiving a bill does not exempt property owners from payment or penalties, according to the county.