Napa County Tax Collector: Pay Taxes, Office Hours & Address
The Napa County Treasurer-Tax Collector handles secured, unsecured and supplemental tax collection. Use this page to reach the official payment system, confirm office hours and contact details, understand annual payment deadlines, and avoid common mistakes with mailed, online or in-person payments.
Napa County Treasurer-Tax Collector
1195 Third Street, Suite 108, Napa, CA 94559
Monday-Friday, 8 a.m.-5 p.m.
707-253-4311
Robert G. Minahen, Treasurer-Tax Collector
Napa County Treasurer-Tax Collector office
The Treasurer-Tax Collector is located in the County Administration Building in downtown Napa. The department lists regular public hours of 8 a.m. to 5 p.m., Monday through Friday.
1195 Third Street, Suite 108
Napa, CA 94559
Main office: 707-253-4327
Tax Collector: 707-253-4311
Robert G. Minahen: 707-253-4312
Toll-free: 877-279-2987
How to pay Napa County property taxes
Napa County provides several payment routes. The best choice depends on how close you are to the delinquency deadline, whether you want electronic confirmation, and whether a processor fee applies to your selected method.
Search your tax account and pay through Napa County’s official property-tax payment service.
Pay at 1195 Third Street, Suite 108 during office hours or use the office drop box as permitted by the County.
Mail a check or money order, or use the County’s automated telephone payment option.
Online payment steps
Pay by mail
Make checks or money orders payable to the Napa County Tax Collector and include the fee parcel number. Use the payment stub when available. Napa County advises taxpayers never to mail cash.
Pay in person or use the drop box
Payments can be made at the Treasurer-Tax Collector office during business hours. The County also identifies a payment drop box outside the main entrance. On a delinquency deadline, payments placed there after 5 p.m. are considered late.
Pay by telephone
The County’s current payment instructions list automated telephone payments at 833-335-5532. Review the fee disclosed by the payment system before authorizing the transaction.
Online and phone payment fees
Napa County’s current online payment page lists processor charges for electronic transactions. These are processing-company charges rather than property taxes collected by the County.
| Payment method | Listed fee | What to check |
|---|---|---|
| Apple Pay / credit / debit / Google Pay | 2.45% of the transaction or $2.95, whichever is higher | Confirm the fee displayed immediately before payment. |
| EFT / electronic check | $0.50 | Verify account and routing information carefully. |
| Automated phone payment | $1.95 additional IVR fee | Listen to the full fee disclosure before authorizing. |
A returned electronic payment can also trigger a processing charge. Napa County’s current payment page lists a $45 returned-payment processing fee, and tax penalties may apply if the returned payment leaves the bill unpaid after the deadline.
How to find a Napa County property tax bill
The County’s payment search supports an assessment number, fee parcel number or property address. Enter only one search criterion in the appropriate field.
Use the ASMT number when you want to display a specific tax bill.
Napa County recommends the fee number when you want to display all tax bills associated with a property, including supplemental and defaulted years.
This is useful when you do not have the bill in front of you, provided the address matches the County record.
The County states that owner names and addresses are not displayed in search results in order to protect privacy.
Napa County property tax due dates
Secured property taxes follow California’s standard two-installment schedule. The due date and the delinquency date are different, so paying after the due date can still be timely as long as payment is completed before the delinquency cutoff.
| Installment | Due | Becomes delinquent | Penalty after cutoff |
|---|---|---|---|
| First installment | November 1 | After December 10 | 10% |
| Second installment | February 1 | After April 10 | 10% plus $10 cost |
If the delinquency date falls on a weekend or holiday, Napa County states that the deadline moves to the next business day. Both installments may be paid when the first installment is due.
If a Napa County tax payment is late, missing or returned
You did not receive the tax bill
Failure to receive a secured property tax bill does not remove the responsibility to pay it. Napa County instructs taxpayers who have not received a secured bill by November 10 to contact the Tax Collector and arrange for a duplicate.
Your online payment has no confirmation number
Treat the payment as incomplete. The County states that a transaction is not successful if the system does not produce a transaction number. Return to the official tax account and verify whether the status shows paid.
Your payment was returned
Correct the bank or account problem promptly. A returned payment can incur a processing charge, and additional delinquency penalties may apply if the tax remains unpaid after the applicable cutoff.
You want a penalty cancelled
Napa County accepts penalty-cancellation requests in qualifying circumstances, but ordinary reasons such as forgetting, being out of town, assuming a mortgage company would pay, or simply not receiving the bill are not automatically valid grounds for cancellation.
A cancellation request may require supporting documentation and separate payments for the original tax amount and the disputed penalties, costs or interest. Use the County’s current instructions before submitting a request.
Tax Collector vs. Napa County Assessor
The Tax Collector collects the amount shown on the tax roll. It does not decide your property’s assessed value.
Supplemental, unsecured and tax-defaulted property
Supplemental property tax
A supplemental bill can result from a reassessment and is an additional tax liability. Its due and delinquency dates can differ from the regular secured-tax schedule.
Unsecured tax
The Treasurer-Tax Collector also collects unsecured taxes. Napa County states that unsecured bills are generally mailed in late July and are due on or before August 31.
Tax-defaulted property
Long-term delinquency is different from a routine late installment. Napa County publishes tax-default notices, redemption information and tax-sale material for affected properties. Owners facing default should contact the Treasurer-Tax Collector directly for the amount needed to redeem the property or to ask whether an installment plan is available.
See Napa County Tax Collector legal notices and publications
Property Tax Postponement and monthly-payment options
Napa County points qualifying homeowners to California’s Property Tax Postponement Program. The County’s current guidance describes the program for eligible homeowners who are seniors, blind or have a disability and who meet state income, equity and other requirements.
Napa County also links to Easy Smart Pay, a privately operated service that can divide property-tax funding into monthly amounts before County deadlines. It is not the Napa County government and is not a lender or bank. Read its terms carefully before enrolling.
Napa County Tax Collector questions
What are the Napa County Treasurer-Tax Collector office hours?
The office lists Monday through Friday hours of 8 a.m. to 5 p.m. County holidays and announced closures can affect availability.
Where is the Napa County Tax Collector office?
The office is at 1195 Third Street, Suite 108, Napa, CA 94559.
When are Napa County secured property taxes due?
The first installment is due November 1 and becomes delinquent after December 10. The second installment is due February 1 and becomes delinquent after April 10. If a delinquency date falls on a weekend or holiday, the County moves the cutoff to the next business day.
Can I pay both property-tax installments at once?
Yes. Napa County allows both installments to be paid when the first installment is due.
What happens if I never received my tax bill?
You are still responsible for timely payment. If a secured bill has not arrived by November 10, contact the Tax Collector for a duplicate.
Can I pay Napa County property taxes by mail?
Yes. Make the check or money order payable to the Napa County Tax Collector, include the fee parcel number, and mail it early enough to receive a timely postmark. Do not mail cash.
Who handles a dispute about my assessed property value?
Assessment and ownership questions generally belong with the Napa County Assessor, not the Treasurer-Tax Collector. The Assessor’s listed phone number is 707-253-4467.
Official Napa County property-tax links
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