Find your San Joaquin tax bill, pay the right account and avoid deadline mistakes
The San Joaquin County Treasurer-Tax Collector handles secured and unsecured property-tax billing and collection, delinquent-tax redemption and county tax-sale administration. For a routine property-tax payment, start with the county’s official bill-search page, verify the assessment or fee-parcel number, and save proof after the transaction posts.
As of September 18, 2026, the annual unsecured-tax August 31 delinquency point has passed. The next regular 2026–27 secured bills are scheduled to be mailed on or before November 1, with the first secured installment due November 1 and normally delinquent after December 10.
What does the San Joaquin Treasurer-Tax Collector handle?
The San Joaquin County Treasurer-Tax Collector collects secured and unsecured property taxes, processes current tax payments, administers tax-defaulted property redemption, manages qualifying redemption payment plans and conducts public tax sales when statutory conditions are met.
Tax bills, payment posting, current balances, delinquency, redemption estimates, payment-plan questions, mailed payments and tax-sale status.
Assessed value, parcel information, ownership or mailing-address changes, exemptions and many property-record questions.
Tax-rate calculations, certain direct charges and special assessments shown separately on a property-tax bill.
Tax Collector, Assessor, Auditor or Clerk of the Board?
A common San Joaquin County mistake is asking the Tax Collector to change the assessed value. The Collector receives the certified tax amount and collects it; other county offices control valuation, calculations and formal assessment appeals.
| Your issue | Start with | Why |
|---|---|---|
| Pay a tax bill or check payment status | Treasurer-Tax Collector | Handles tax bills, collection and payment posting. |
| Assessed value looks too high | Assessor | The Assessor establishes taxable property values. |
| Change property mailing address | Assessor | The Tax Collector’s own guidance directs mailing-address changes to the Assessor. |
| Question about tax rate or calculation | Auditor-Controller | The Auditor applies rates, direct charges and special assessments before the bill reaches the Tax Collector. |
| File a formal assessment appeal | Clerk of the Board | The Clerk administers the Assessment Appeals Board process. |
| Recorded deed or document | Recorder-County Clerk | Recorded land documents are not Tax Collector records. |
Where San Joaquin County property taxes stand right now
The date matters because California property-tax rules change depending on whether the bill is current, delinquent or already tax-defaulted. These are the practical checkpoints for September 18, 2026.
Amounts still unpaid after the June 30 cutoff moved into tax-defaulted status and can accrue redemption charges.
Annual unsecured taxes on the July 31 roll became delinquent after the August 31 deadline if unpaid.
Annual secured bills are scheduled to be mailed on or before November 1, when the first installment also becomes due.
| Date | What happens | What taxpayers should do |
|---|---|---|
| September 15, 2026 | County’s informal annual value-review filing period ended. | If valuation remains disputed, check whether the formal appeal route is still available. |
| November 1, 2026 | Secured tax bills mailed on or before this date; first installment due. | If no bill arrives, obtain a copy rather than waiting past the deadline. |
| November 30, 2026 | Current listed end of the formal assessment-appeal filing period. | Use the Clerk of the Board process, not a Tax Collector payment dispute. |
| December 10, 2026 | Normal first secured-installment delinquency cutoff. | Pay or obtain a qualifying timely postmark by the applicable deadline. |
| February 1, 2027 | Second secured installment due. | The second installment may be paid separately only after the first is paid. |
| April 10, 2027 | Normal second-installment delinquency cutoff. | Weekend or legal-holiday adjustments can move the deadline to the next business day. |
How to search and pay a San Joaquin County property-tax bill
The county’s payment system works best when you have the assessment number or fee-parcel number. Address search is also available in the payment system, but when an address is difficult to match, the Assessor’s inquiry can help identify the correct parcel first.
Use the San Joaquin County “Pay Taxes or Obtain a Tax Bill” page or its county-authorized MPTS search system. Avoid search advertisements or copied checkout links.
The portal warns that historical roll data is not current payment information. Select the proper roll year before relying on an amount.
The 12-digit assessment number is particularly useful and is required for phone payments. A fee-parcel search can show a broader account summary.
Match the property location, assessment, fee parcel, tax year, tax type and installment. A parcel search can sometimes show an unsecured bill owed by another assessee.
eCheck is currently listed without a convenience fee. Debit and credit cards have third-party fees, so check the final payment screen before submitting.
A transaction number does not guarantee that an eCheck clears. Keep the confirmation and verify both your bank activity and the county account afterward.
eCheck, debit, credit card, phone, mail and counter payments
| Method | Current published cost/rule | Practical check |
|---|---|---|
| Online eCheck | No convenience fee currently listed. | Verify routing number, account number, account-holder name, funds and ACH-block authorization. |
| Debit card | $3.49 per transaction. | Fee goes to the third-party processor rather than the County. |
| Credit card | 2.29% of the amount paid, with a $1.35 minimum. | Large tax payments can generate a significant processor fee. |
| Phone | 877-777-3839; 12-digit assessment number required. | Prior-year taxes and payment-plan setup are not available through the phone-payment system. |
| Check or money order payable to SJC TTC. | Include payment stub and assessment number; do not mail cash. | |
| In person | 44 N. San Joaquin St., Suite 150, Stockton. | Regular hours are 8:30 a.m.–4:30 p.m. weekdays, excluding holidays. |
Mailing address, downtown Stockton counter and postmark rules
SJC TTC
P.O. Box 2169
Stockton, CA 95201-2169
- Make payment payable to SJC TTC.
- Use check or money order.
- Include the payment stub.
- Write the assessment number on the payment.
- Do not mail cash.
44 North San Joaquin Street
First Floor, Suite 150
Stockton, CA 95202
- Weekdays 8:30 a.m.–4:30 p.m.
- Closed on county holidays.
- Open until 5:00 p.m. on delinquency dates.
- The public entrance is identified by the County on the Weber Avenue side of the building.
Secured, unsecured and supplemental taxes are not interchangeable
Usually real estate. The tax is secured by the land and improvements. Annual bills use the familiar November 1 / December 10 and February 1 / April 10 installment cycle.
A lien against the assessee rather than the real property. Common examples include business property, boats, aircraft, possessory interests and some assessments involving former owners.
Can follow a change in ownership or completed new construction. The supplemental bill is separate from the annual secured bill and uses its own mailing-based delinquency schedule.
What happens when San Joaquin County secured property taxes go unpaid?
Missing the first or second secured-tax delinquency deadline starts a statutory penalty process. Leaving secured taxes unpaid through the end of June moves the property into tax-defaulted status, where redemption charges begin and the original annual bill no longer tells you the full amount needed to clear the account.
| Stage | Published consequence | Best next action |
|---|---|---|
| First installment unpaid after deadline | 10% delinquent penalty. | Get the current amount before paying. |
| Second installment unpaid after deadline | 10% delinquent penalty plus $10 administrative cost. | Confirm both installments and all charges. |
| Still unpaid after June 30 | $15 state redemption fee plus 1.5% monthly redemption penalty on unpaid base taxes. | Ask the redemption section for a date-specific payoff. |
| Five years after default | Property may become subject to the Tax Collector’s power of sale. | Contact the redemption section immediately rather than relying on an old bill. |
How San Joaquin County’s defaulted-tax payment plan works
The statutory redemption plan is different from a private monthly budgeting service. It applies after property becomes tax-defaulted and can spread the redemption balance over a five-year period when the account still qualifies.
The County requires an initial payment of at least 20% to establish the plan.
Plan payments do not include the new annual property-tax bill. Current taxes and applicable supplemental taxes must still be paid.
By each April 10, the plan requires at least 20% of the redemption amount plus accrued interest, together with timely current taxes.
Missing the annual payment or current-tax requirement can default the arrangement and cause redemption penalties to be recalculated.
A new plan generally cannot be started once the property reaches the applicable five-year power-to-sell point.
Current San Joaquin County tax-sale status
The County’s live public-auction page currently lists the next auction date, time and location as TBD. That means a bidder should not rely on an old sale date, recycled property list or third-party auction advertisement.
Parties of interest may redeem through the County’s stated cutoff, generally 5:00 p.m. Pacific on the day before the sale. Power-to-sell redemption requires certified funds.
For an active sale, the County directs bidders to Bid4Assets and currently lists a $5,000 deposit plus a $35 nonrefundable Bid4Assets processing fee.
Tax-sale property is offered as-is. Bidders are expected to research title, access, zoning, code issues, environmental concerns, liens, parcel conditions and special assessments.
What to do when you only know the property address
The official Assessor inquiry allows searches by address, assessment number or fee-parcel number. This is useful when the Tax Collector payment portal is not finding the street address in the format you entered.
Accept the county disclaimer and select the appropriate property search.
Use the property’s physical location and review the matching parcel rather than relying only on a taxpayer name.
These numbers are more reliable for moving between the Assessor and Tax Collector systems.
Use the identifier to locate current or delinquent tax-bill information and verify the bill type before paying.
2026 value-review and formal appeal timing
San Joaquin County lists the 2026 informal value-review period as July 3 through September 15, so that window has now passed. The listed formal assessment-appeal filing period continues through November 30, 2026.
For assessed value, parcel records, exemptions and mailing-address questions, contact the Assessor at 209-468-2630 or visit Suite 230 at 44 N. San Joaquin Street.
The formal appeal is administered through the Clerk of the Board/Assessment Appeals Board process. Filing an appeal does not automatically turn the Tax Collector bill into a disputed-payment account.
My County Connect eBilling and downloadable bill copies
San Joaquin County’s My County Connect service currently supports annual secured and unsecured property-tax bills. Enrollment requires the eBill PIN from the current-year bill, and the County says paper bills continue to be mailed to enrolled taxpayers at this stage.
- Email bill access.
- Viewing payment status.
- Downloading a PDF copy of the annual bill.
The County warns that failure to receive an email reminder does not remove the responsibility to pay or excuse a statutory penalty.
When a late-payment penalty usually cannot simply be waived
California penalty relief is limited. San Joaquin County specifically lists several common explanations that do not, by themselves, authorize the Treasurer-Tax Collector to waive a statutory late penalty.
A correction or refund claim may still be appropriate when the facts fit a legal basis. Use the County’s current form instead of an old downloaded copy.
Common San Joaquin property-tax problems and what to do next
The payment system intentionally limits owner information. Use the issued bill, Assessor inquiry or Tax Collector phone support.
Do not pay it automatically. A fee-parcel search can surface an unsecured assessment owed by a different assessee.
Check routing/account details, available funds and ACH blocks. A transaction number is not proof that settlement succeeded.
Confirm whether the first installment remains unpaid. The second may be paid separately only after the first has been paid.
Ask the servicer for the amount, submission date, assessment number and trace information, then compare that with the County account.
Call the redemption section for a date-specific payoff. Do not rely on the face amount of the old annual bill.
Determine whether the concern is assessed value, tax calculation or a direct assessment, then contact the office that controls that part of the bill.
Call the redemption section immediately. Do not assume a routine current-year online payment will remove a power-to-sell issue.
San Joaquin County Treasurer-Tax Collector phone, address and mailing address
| Contact route | Verified detail | Use it for |
|---|---|---|
| Tax office phone | 209-468-2133 | Tax bills, balances, posting, default, redemption and auction questions. |
| tax@sjgov.org | Non-urgent account and department questions. Never email bank/card credentials. | |
| Fax | 209-468-2158 | General Tax Collector fax route when instructed. |
| Payment-system technical help | 866-628-9244 | Technical problems with the online payment system, not tax-law questions. |
| Phone payment | 877-777-3839 | Current-year phone payments with the 12-digit assessment number. |
| Physical office | 44 N. San Joaquin St., First Floor, Suite 150, Stockton, CA 95202 | Counter payment and in-person Tax Collector help. |
| Mail payment | SJC TTC, P.O. Box 2169, Stockton, CA 95201-2169 | Check or money-order property-tax payments. |
Use the correct county if the parcel is outside San Joaquin
California counties share the November/December and February/April secured-tax rhythm, but they do not share the same payment portal, phone number, office or delinquent-tax account. Switch guides if the property is in another county.
For Sacramento-area property-tax payment, parcel lookup, office and delinquent-tax questions.
For Modesto, Turlock, Oakdale and other Stanislaus County property-tax accounts.
For Oakland, Hayward and other Alameda County property-tax payments and office routing.
Use the statewide office guide when you need to identify which California county office controls a bill.
Verified San Joaquin County links to use when you are ready to act
Live balances, payment-processor fees, office closures, auction dates, parcel lists and redemption amounts can change. Use the issued bill and these official county routes for the final transaction.
San Joaquin Treasurer-Tax Collector FAQs
What is the San Joaquin County Treasurer-Tax Collector phone number?
Call 209-468-2133 for property-tax billing, payment, delinquency, redemption and public-auction questions. The separate online-payment technical support number is 866-628-9244.
Where is the San Joaquin Treasurer-Tax Collector office?
The public office is at 44 North San Joaquin Street, First Floor, Suite 150, Stockton, CA 95202. Regular hours are 8:30 a.m. to 4:30 p.m. weekdays, excluding holidays, with hours extended to 5:00 p.m. on delinquency dates.
How do I pay San Joaquin County property taxes online?
Start from the County’s official “Pay Taxes or Obtain a Tax Bill” page, open the authorized MPTS portal, select the proper roll year, verify the assessment or fee-parcel number and bill type, choose a payment method and save the confirmation.
Is there a fee for paying San Joaquin County property tax online?
The County currently lists no convenience fee for eCheck, $3.49 per debit-card transaction and a 2.29% credit-card fee with a $1.35 minimum. Fees are charged by the payment processor rather than the County.
When are San Joaquin County secured property taxes due?
The first installment is due November 1 and normally becomes delinquent after December 10. The second installment is due February 1 and normally becomes delinquent after April 10. Weekend or legal-holiday rules can move a delinquency cutoff to the next business day.
What happens if I miss a San Joaquin County secured-tax deadline?
A missed first installment receives a 10% delinquent penalty. A missed second installment receives a 10% penalty plus a $10 administrative cost. If secured taxes remain unpaid after June 30, the property can become tax-defaulted and additional redemption charges begin.
Can I search San Joaquin County property taxes by address?
Yes. The tax-payment system supports search options, and the official Assessor inquiry also supports address, assessment-number and fee-parcel searches. When the payment system cannot identify the property cleanly, use the Assessor to obtain the parcel identifiers first.
What is an unsecured tax bill in San Joaquin County?
Unsecured taxes are liens against the assessee rather than the real property. Examples include business property, boats, aircraft, possessory interests and certain assessments involving former property owners.
Can I make payments on defaulted San Joaquin County property taxes?
Qualifying tax-defaulted property may be eligible for a statutory five-year redemption payment plan. The plan generally requires an initial payment of at least 20% of the redemption amount and continued payment of current and supplemental taxes. Contact the redemption section for account-specific eligibility.
When is the next San Joaquin County tax sale?
The official County public-auction page currently lists the next auction date, time and location as TBD. Verify the live County auction page before registering, sending a deposit or relying on a third-party property list.
Should I contact the Tax Collector or the Assessor?
Contact the Treasurer-Tax Collector for bills, payments, posting, penalties, defaulted taxes, redemption and tax-sale questions. Contact the Assessor for property value, exemptions, ownership records, parcel information and mailing-address changes.
The TaxCollectors.org Editorial Team researches and reviews U.S. tax collector offices, property tax procedures, payment resources, deadlines, and official government links. TaxCollectors.org is an independent information publication operated by Quarks Systems Global Solutions.