The Tax Collector is responsible for the collection of Secured, Unsecured and Supplemental taxes.
If you do not receive your secured tax bill by then, please email our office or call 707-253-4312 to arrange for a duplicate, as failure to receive a tax bill does not relieve your obligation to pay. If you have questions regarding the valuation or ownership of secured properties, please email the County Assessor’s department at 707-253-4467.
The First Installment of taxes is due and payable on November 1st, and will become delinquent if not paid by 5 p.m., or the close of business, whichever is later, on December 10th; thereafter a 10% penalty will be added.
(If delinquency date falls on a weekend or holiday, the delinquency date is the next business date.)
The Second Installment of taxes is due and payable on February 1st, and will become delinquent if not paid by 5 p.m., or the close of business, whichever is later, on April 10th; thereafter a 10% penalty plus a $10 cost fee will be added.
The Napa County Treasurer-Tax Collector’s Office mails unsecured tax bills to taxpayers in late July. The tax bills are due on or before August 31st. If you do not receive your tax bill by August 1st, please contact the Treasurer-Tax Collector’s Office at 707-253-4312 to arrange for a duplicate, as failure to receive a tax bill does not relieve your obligation to pay. If you have questions regarding the valuation or ownership of unsecured properties, please email the County Assessor’s department at 707-253-4467.
According to California State Law, the unsecured tax lien date is January 1 for the following fiscal year. If you owned a boat / business / aircraft or occupied a possessory interest on January 1st, you are legally responsible for the total taxes due. Any proration of these taxes is strictly between buyer and seller. If you sold the boat/business/aircraft or moved, please email the County Assessor’s department at 707-253-4467.
Payments may be made in person at or mailed to the Napa County Treasurer-Tax Collector’s Office:
County Administration Building
1195 Third Street
Napa, CA 94559
Our business hours are 8 a.m. - 5 p.m., Monday through Friday.
To pay taxes online, go to our payment page. To pay by phone, call 855-627-2121. No Charge for ACH-eChecks and the credit card is 2.32% with no minimum fee.
Property Tax Postponement Program
The Property Tax Postponement Program allows homeowners who are seniors, are blind, or have a disability to defer current-year property taxes on their principal residence if they meet certain criteria including 40 percent equity in the home and an annual household income of $45,000 or less. The interest rate for all taxes postponed under the PTP program is 5 percent per year.
- Download the Property Tax Postponement Application and Instructions (PDF) PDF PDF PDF
- Or, visit the California State Controller website for more information about the program.
Tax Collector Moving to Lockbox Services
The Napa County Treasurer-Tax Collector’s Office is moving to lockbox services for property tax payments received through the mail. The Tax Collector’s Division has contracted with RT Lawrence to provide lockbox services which include:
- Scanning all payments, envelopes and correspondence received. These images are attached to the parcel master file for access by internal Napa County Tax Collector staff.
- Recording each payment to the correct property tax bill in the County’s property tax system.
- Transmitting all payments and images to the Tax Collector via an encrypted file transfer.
- Providing a file of payment issues requiring immediate Tax Collector attention.
Our goal with this change is to provide more timely assistance to Napa County Taxpayers. We encourage you to reach out to the Napa County Tax Collector staff with any questions or issues that we can help explain and/or resolve.
RT Lawrence has provided imaging and property tax linkage services to Napa County for many years. The lockbox services will leverage existing processes and equipment to make property tax payment processing more efficient.
This change will have minimal impact on taxpayers. The mailing address for payments has changed to:
Robert G. Minahen
Napa County Treasurer-Tax Collector
P.O. Box 6002
Whittier, CA 90607-6002
The new remittance address is included on the two return payment envelopes provided with your property tax bill, so simply take advantage of the envelopes provided and drop them in the mail. If using window envelopes, please change the remit to address for the Napa County Tax Collector to the Post Office Box above.
Property tax payments will continue to be accepted via electronic payments (credit cards or eChecks) and in person at the Napa County Administration Building.
As always, if you have any questions please contact the Tax Collector’s Division at (707) 253-4312.