How are the supplemental tax amounts determined?
The difference between the new value and the old January 1 value is multiplied by a proration factor. The proration factor is the percentage of months remaining in the fiscal year. This result is then multiplied by the tax rate (usually 1% plus voter approved indebtedness) to determine the supplemental tax amount due. Contact us ad 209-385-7592 for more information.

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1. What are "supplemental" property taxes?
2. How are the supplemental tax amounts determined?
3. When should I expect my supplemental tax bill(s)?
4. Why did I receive more than one supplemental tax bill?
5. When is the supplemental tax due?
6. When does the supplemental bill become delinquent?
7. If I don’t pay on time, will I be charged a penalty?
8. When should I mail my payment to avoid penalties?
9. Is a private postage meter date the same as the United States Postal Service postmark?
10. Can payments be postmarked on the deadline date?
11. Can I pay my supplemental property tax bill with my credit card?