Siskiyou County Property Tax Guide for Homeowners and Sellers

Last updated November 13, 2026. Reviewed by the Cash Home Buyers CA team. Figures come from the Siskiyou County Treasurer-Tax Collector and Assessor-Recorder; sources are listed at the end.

Siskiyou County property tax is billed once a year in October and paid in two installments, delinquent at 5 p.m. on December 10 and April 10. After December 10 the first installment carries a 10 percent penalty, and after April 10 the second carries 10 percent plus a $20 cost. Taxes owed when you sell are settled from your proceeds at closing.

Siskiyou County property tax at a glance

Secured bills mailed	October
First installment	Due November 1, delinquent at 5 p.m. on December 10
Second installment	Due February 1, delinquent at 5 p.m. on April 10
Late penalty	First installment: 10%. Second installment: 10% plus a $20 cost
Unsecured bills	Mailed in July, delinquent after August 31
Payment plan	Delinquent secured taxes: 20% down, a one-time fee, five annual payments, 1.5% a month
Tax Collector	311 Fourth Street, Room 104, Yreka, CA 96097. Phone (530) 842-8340. Monday to Friday, 8 a.m. to 5 p.m., closed noon to 1 p.m.
Transfer tax when you sell	$0.55 per $500 of value, set by Revenue and Taxation Code section 11911

When are Siskiyou County property taxes due?

The first installment is due November 1 and turns delinquent at 5 p.m. on December 10. The second is due February 1 of the next year and turns delinquent at 5 p.m. on April 10.

If a deadline falls on a weekend or legal holiday, paying by 5 p.m. on the next business day avoids the penalty. For this year’s bill, that gives Thursday, December 10, 2026, and Monday, April 12, 2027, since April 10 falls on a Saturday.

• The county says plainly that no reminder is sent for the second installment.
• You may pay the full amount, with both stubs, by December 10.
• A payment stub is not required to pay, and a duplicate bill can be ordered by phone or in person.
• Unsecured bills, such as those on business equipment, go out in July and are delinquent after August 31.

Where do I pay Siskiyou County property taxes?

The Treasurer-Tax Collector’s Office is at 311 Fourth Street, Room 104, in Yreka. It is open Monday through Friday except holidays, 8 a.m. to 5 p.m., and closes for lunch from 12 to 1. Call (530) 842-8340, or the toll-free line, (888) 854-2000 extension 8340. The Assessor’s Office, which handles mailing address changes and questions about your assessed value, is down the hall in Room 108 at (530) 842-8036.

Your bill may also include special assessments that are not based on the Assessor’s valuation, such as a sewer service charge. Those come from the district that charges them, not from the county’s valuation process.

What happens if I don’t pay property taxes in Siskiyou County?

You pay more right away. A first installment unpaid after December 10 gets a 10 percent penalty, and a second installment unpaid after April 10 gets 10 percent plus a $20 cost. On a $1,500 second installment, that adds $170.

Taxes that stay unpaid become delinquent secured taxes, and the county offers a payment plan for them. The Treasurer-Tax Collector’s plan requires 20 percent down, a one-time $43 fee, and five annual payments, with interest at 1.5 percent a month on the balance. The plan is meant to give owners a structured way back to current, and you should confirm the present terms with the office before relying on them.

The pages we reviewed do not lay out Siskiyou County’s tax sale timeline or redemption amounts, so we are not stating them here. If your parcel has been delinquent for years, ask the Tax Collector in writing where it stands and what it would cost to redeem on a specific date.

What is a supplemental tax bill in Siskiyou County?

A supplemental bill follows a reappraisal after an ownership change or completed new construction. The county says these bills arrive at different times during the year and are due when mailed, so they do not follow the November and February rhythm of the annual bill. Questions about how the new value was set go to the Assessor’s Office.

If you disagree with a value, start with an informal review by phone. A formal appeal goes to the Assessment Appeals Board, which accepts applications for the following year between July 2 and November 30. An out-of-cycle assessment, such as an escape assessment, has a shorter window: 60 days from the notice or related bill.

Estimate your Siskiyou County transfer tax when you sell

The Assessor-Recorder’s fee schedule lists the documentary transfer tax at $0.55 for each $500, or part of $500, under Revenue and Taxation Code section 11911. The Recorder’s Office is at 311 Fourth Street, Room 108, Yreka, phone (530) 842-8065. The calculator below applies the county rate with no city tax.

How to sell a house in Siskiyou County when you owe property taxes

Yes, a house with unpaid taxes can be sold. The taxes attach to the property, so escrow pays them out of your sale proceeds and the new owner starts clean.

1. Get an exact payoff. Call (530) 842-8340 and ask what it would take to bring the parcel current on your target closing date.
2. Weigh the plan against selling. Five annual payments with 1.5 percent monthly interest can add up, and a sale may cost less overall.
3. Plan for the transfer tax. On a $350,000 sale the county rate is $385.
4. Pick the closing date. Closing ahead of December 10 or April 10 keeps that installment penalty-free.

We buy houses in Siskiyou County in any condition and can close on a date that suits you. Ask for a cash offer to see the numbers.

Siskiyou County property tax FAQ

What time are Siskiyou County property taxes late?

At 5 p.m. on December 10 for the first installment and at 5 p.m. on April 10 for the second. If either date is a weekend or legal holiday, you have until 5 p.m. the next business day.

What is the penalty for a late second installment in Siskiyou County?

Ten percent of the installment plus a $20 cost.

Does Siskiyou County offer a payment plan for delinquent taxes?

Yes, for delinquent secured taxes: 20 percent down, a one-time fee, five annual payments and 1.5 percent a month on the balance.

What is the documentary transfer tax in Siskiyou County?

$0.55 for each $500 of value, or part of $500, under Revenue and Taxation Code section 11911.

How do I sell a house in Siskiyou County with delinquent property taxes?

Get the payoff from the Tax Collector, give it to escrow, and the taxes are paid from your proceeds at closing.

Sources

• Siskiyou County Treasurer-Tax Collector: Tax Payment Due Dates
• Siskiyou County Treasurer-Tax Collector: Tax Collection FAQ
• Siskiyou County Treasurer-Tax Collector: Payment Plans for Delinquent Secured Taxes
• Siskiyou County Assessor-Recorder: Recorder Fee Schedule

This guide is general information, not tax or legal advice. Rates, fees and dates can change; confirm the amount on your own bill with the Siskiyou County Treasurer-Tax Collector.