Find, Pay or Fix a Marin County Property Tax Bill
Use this guide to reach the official Marin County Tax Collector, look up a property tax bill by APN, compare e-check and card costs, mail a payment safely, and avoid the common San Rafael Civic Center office mix-up.
Most payment questions go to the Tax Collector in Suite 202. Value, exemption, parcel record and mailing address questions go to the Assessor-Recorder-County Clerk in Suite 208.
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3501 Civic Center Dr., Suite 202.
Mon-Fri, 9:00 a.m.-4:30 p.m.
P.O. Box 4220, San Rafael.
What should you do first?
Use the official tax bill service and search with the APN or property identifier shown on the bill.
Call the Tax Collector with the APN, bill number, tax year, installment and payment proof.
Use the Assessor route. Paying the bill does not update the assessment roll or mailing address.
What this page adds beyond a basic Marin County Tax Collector result
Most search results answer only one thing: a phone number, a link, or a short office listing. That is not enough when a taxpayer is trying to avoid a penalty, confirm an escrow issue, mail near a deadline or fix an address problem.
Shows when e-check, card, phone, mail, bill pay and in-office payment make sense.
Separates due dates from delinquent cutoffs, USPS postmark risk and June 30 tax-default risk.
Explains why mailing address, assessed value and exemption questions should go to the Assessor instead of the Tax Collector.
Official source conflicts to know before paying
County pages can be updated at different times. When two official pages use slightly different wording, use the page closest to the transaction and confirm at checkout.
How to pay Marin County property tax online
Marin County says an Assessor Parcel Number is needed to view and pay a bill online. The tax bill online service shows the property identifier format as 999-999-99.
How to search when you do not have the full bill
Marin County Tax Collector phone number, address, hours and mailing address
San Rafael, CA 94903
Phone: 415-473-6133
California Relay: 711
Hours: Monday-Friday, 9:00 a.m.-4:30 p.m., excluding county holidays.
P.O. Box 4220
San Rafael, CA 94913-4220
Make checks or money orders payable to Marin County Tax Collector. Include the correct installment stub. Do not mail cash.
Marin County property tax payment fees: e-check, card, phone and returned payments
The county payment pages say e-check from a checking or savings account has no service fee.
The live payment flow and payment page show a third-party service fee. Review the exact fee at checkout before submitting.
Returned checks or failed payments can add a returned-payment fee and may create late-penalty risk if the failure is discovered after a deadline.
Marin County Tax Collector mailing address and USPS postmark rules
Mailing near a delinquent date is risky because the controlling date is the valid USPS postmark or county receipt date, not the moment you drop an envelope in a mailbox.
Marin County property tax due dates, delinquent dates and bill timing
Secured property tax bills are mailed once each year, usually in the first week of October.
Due November 1 and delinquent after 5:00 p.m. on December 10, unless the weekend or legal-holiday rule applies.
Due February 1 and delinquent after 5:00 p.m. on April 10, unless the weekend or legal-holiday rule applies.
Both secured installments can be paid together on or before the first-installment deadline.
Annual unsecured personal property taxes are due on receipt and delinquent after 5:00 p.m. Pacific Time on August 31.
Business/personal property statements are due if required or requested; penalties apply after the stated May deadline.
Late penalties, returned payments, partial payments and cancellation requests
A 10% penalty is added after the first-installment delinquent cutoff.
An additional 10% penalty and a $20 administrative cost are added after the second-installment cutoff.
Current annual secured tax bills require full payment of the amount due. Lesser payments can be returned.
New Marin County property owner? Do not trust escrow memory alone
New owners often assume escrow, the seller or the mortgage lender already handled the tax bill. Marin County guidance warns that taxes may be prorated in escrow without being paid to the Tax Collector at that time.
Why a Marin County supplemental tax bill can arrive after purchase or construction
A supplemental assessment can happen after a sale or completed new construction. The Assessor sends the assessment notice, and the Tax Collector later sends the bill.
The Assessor notice explains the reassessment. The Tax Collector bill is the item you pay.
Do not assume a mortgage impound account pays a supplemental bill unless the lender confirms it.
Marin County Tax Collector change of address: use the Assessor form
If your tax bill is going to the wrong address, paying a bill does not automatically update the mailing address. Marin County says tax information continues to mail to the address on file until you update it with the Assessor.
Marin County Tax Collector vs Assessor: who handles what?
- property tax balances and duplicate bills;
- online, phone, mail and in-person payment;
- payment posting and receipts;
- installment and delinquent cutoff questions;
- returned payments and replacement funds;
- penalties, penalty-cancellation process and tax-default payoff.
- assessed value and value notices;
- parcel records and property characteristics;
- mailing address changes;
- homeowner, veteran, disabled veteran and other exemption questions;
- decline-in-value review;
- ownership and reassessment questions.
Official PDF/source details worth knowing
For this search intent, the best source for payment is the live county tax bill service. Some official PDFs and document pages are still useful, but only for the right task.
Use when the mailing address on tax bills or Assessor communications must be updated. The Assessor warns valid government-issued photo ID is required.
Use for tax rates and voter-approved assessments above California’s basic 1% property tax structure. Do not use a rate book to confirm your payment balance.
Use the live bill and stub pages to confirm bill number, parcel number, status, amount due and mailing stub details before payment.
What happens if Marin County secured taxes remain unpaid after June 30?
If one or both secured installments remain unpaid after the fiscal-year cutoff, the property can become tax-defaulted. This is not the same as a normal late installment.
A redemption fee and additional monthly penalties can accrue after default.
Use a current payoff instead of an old bill, screenshot or escrow estimate.
If taxes remain unpaid for the legal period, property can become subject to tax-defaulted land-sale procedures.
Marin County Tax Collector email and safer account questions
The official county pages provide an “Email Tax Collector” contact route, but this guide does not publish an unverified plain email address. For account-specific questions, use the official county email link or call 415-473-6133.
Marin County Tax Collector map and Civic Center visit tips
The Tax Collector public counter is listed at the Marin County Civic Center in San Rafael. Use Suite 202 for payment and billing help. Use Suite 208 for Assessor records, address changes and assessment questions.
Map is for directions only. Verify county holidays, special deadline notices and the correct suite before driving.
Official Marin County links to use when you are ready to act
Use for the official Tax Collector landing page, contact details and property tax topic links.
Use for online, phone, mail, in-office, bill pay, lender and fee guidance.
Use before mailing close to a deadline or relying on a USPS postmark.
Use to verify California property tax dates, unsecured tax timing and appeal windows.
Use if you recently bought property, closed escrow or received a supplemental bill.
Use for real property, business property and vessel mailing address updates.
Marin County Tax Collector FAQs
What is the Marin County Tax Collector phone number?
Call the Marin County Tax Collector at 415-473-6133 for property tax billing and payment questions. For automated phone payment, call 1-800-985-7277 with the bill number ready.
Where is the Marin County Tax Collector office?
The Tax Collector office is at 3501 Civic Center Drive, Suite 202, San Rafael, CA 94903. Assessor help is in a different suite, so check the right office before visiting.
What is the Marin County Tax Collector mailing address?
Mail property tax payments to Marin County Tax Collector, P.O. Box 4220, San Rafael, CA 94913-4220. Make checks or money orders payable to Marin County Tax Collector and include the correct installment stub.
What are Marin County Tax Collector hours?
Current public hours are Monday through Friday, 9:00 a.m. to 4:30 p.m., excluding county holidays. Check official county notices near December, April and June deadline periods.
How do I pay Marin County property tax online?
Open Marin County’s official tax bill online service, enter the APN or property identifier, open the matching bill, verify the parcel, fiscal year and installment, choose a payment method, review the fee and save the confirmation.
Is e-check cheaper than paying Marin County property tax by card?
Usually, yes. Marin County payment guidance lists no service fee for e-check. Card payments carry a third-party service fee, so review the checkout screen before paying.
When are Marin County secured property taxes due?
The first installment is due November 1 and delinquent after 5:00 p.m. on December 10. The second installment is due February 1 and delinquent after 5:00 p.m. on April 10, unless weekend or legal-holiday rules change the cutoff.
Can I make partial monthly payments on my Marin County secured property tax bill?
For current annual secured bills, Marin County FAQ guidance says full payment must be made toward the amount due and payments for less than the amount due can be returned.
Who handles Marin County property tax change of address?
The Marin County Assessor-Recorder-County Clerk handles tax mailing address changes. Use the official Assessor address-change route and prepare valid government-issued photo ID.
Why did I get a supplemental Marin County tax bill after buying property?
A change in ownership or completed new construction can trigger a supplemental assessment. The Assessor sends the notice, then a separate Tax Collector bill follows. Do not assume your lender will pay it unless the lender confirms that specific bill.
What should I do if my lender was supposed to pay the bill?
Check whether the bill says a copy was sent to a paying agent. If it does not, contact the lender right away and verify payment before the delinquent date. The property owner remains responsible for timely payment.
Is TaxCollectors.org the official Marin County Tax Collector website?
No. TaxCollectors.org is an independent guide. Use official County of Marin and Marin Assessor pages for final balances, payments, fees, deadlines, forms and account-specific decisions.