Supplemental Assessment FAQ
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Supplemental Assessment FAQ
The increase (or decrease) in assessed value resulting from the reappraisal is reflected in a prorated assessment (a supplemental bill) that covers the period from the first day of the month following the supplemental event to the end of the fiscal year. A fiscal year runs from July 1 through June 30.
Supplemental assessments apply to real property (land, improvements, and fixtures and taxable possessory interests) but do not apply to personal property or any property not subject to Article XIII A (Proposition 13).
Revenue and Taxation Code sections 75–75.72 detail the laws governing the supplemental assessment process.
If the net supplemental assessment is a positive number, the increase in taxes will be calculated by the county auditor-controller based on the change in value. One, or possibly two, supplemental tax bill(s) will be generated and mailed to you by the county tax collector. If the net supplemental assessment is a negative number (a decline in value), the auditor-controller will issue a prorated refund.
Once the new assessed value of your property has been determined, the county assessor will send you a “Notice of Supplemental Assessment.” This notice will show you what the net supplemental assessment amount is and how it was calculated.
|New value at date of purchase or completion of new construction:||$ 250,000|
|Prior assessed value:||– 200,000|
|Net Supplemental Assessment:||+ $50,000|
A supplemental reduction in value will not reduce (nor can it be used as a credit toward) the amount still due on the existing annual tax bill. The amount of tax shown on the original tax bill must be paid even though the assessed value of the property was reduced by the supplemental assessment.
If a supplemental event occurs between June 1 and December 31, only one supplemental tax bill or refund check is issued. This bill or refund accounts for the property’s change in value for the period between the first day of the month following the event date and the end of the current fiscal year (i.e., the following June 30). If, however, a supplemental event occurs between January 1 and May 31, two supplemental tax bills or refund checks are issued. The second bill or refund accounts for the property’s change in value for the entire 12 months of the coming fiscal year, beginning on the following July 1.
The tax or refund amount resulting from a supplemental assessment becomes effective on the first day of the month following the month in which the supplemental event took place; monthly proration factors are used to calculate the taxes owed. Taxes supplemental to the current roll are computed by first multiplying the net supplemental assessment by the tax rate, and then multiplying that amount by a monthly proration factor. The proration factors are as follows:
|Tax Effective||Factor||Months Remaining|
* A supplemental event that occurs in June rolls over to July 1, the first day of the new fiscal year. As a result, there is no supplemental assessment to thecurrent roll; however, there is a supplemental assessment to the new roll (the annual tax roll created as of the preceding January 1 lien date) that covers the full 12 months of the ensuing fiscal year beginning July 1. Therefore, a single supplemental bill or refund is issued.
Supplemental event occurs in March 2008; additional tax effective April 1, 2008:
|Annual tax increase||=||$400 ($39,000 x 1.025% tax rate, including bond debt)|
|Supplemental tax bill #1||=||$100 ($400 x .25 proration factor*)|
* For remaining months April, May, and June of fiscal year July 1, 2007 to June 30, 2008
|Supplemental tax bill #2||=||$400 (For the increased taxes for the entire ensuing fiscal year, July 1, 2008 to June 30, 2009)|
Supplemental event occurs in October 2007; additional tax effective November 1, 2007:
|Annual tax increase||=||$400 ($39,000 x 1.025% tax rate, including bond debt)|
|Supplemental tax bill #1||=||$268 ($400 x .67 proration factor*)|
* For the remaining eight months of fiscal year
July 1, 2007 to June 30, 2008
As the above examples illustrate, the county auditor-controller calculates the supplemental tax or refund, prorated based upon the number of months remaining in the fiscal year in which the event occurred.
Boats are personal property which are assessed annually based on their market value on January 1.
Fixtures, which are normally valued as a separate appraisal unit from a structure.
Property subject to the California Land Conservation Act (Williamson Act), including improvements under contract (for example, trees and vines).
Property subject to assessment as a restricted historical property.
Property restricted to timberland use pursuant to subdivision (j) of Section 3 of Article XIII of the California Constitution.
Property subject to valuation as a golf course pursuant to Section 10 of Article XIII of the California Constitution (non-profit golf courses).
Property subject to valuation pursuant to Section 11 of Article XIII of the California Constitution (municipally owned property located outside the boundaries of the municipality).
If you are unable to resolve the issue with the county assessor and choose to appeal your assessment, you must still pay in full the tax installments due on any existing tax bills by the appropriate deadlines; otherwise, you will incur penalties while the case is in the appeals process. Filing an appeal does not suspend the payment of any property taxes due on the assessment under appeal.
If the assessment appeals board grants a reduction in value, a refund will be issued at some point after the appeals board transmits its decision to the county auditor. In any case, it is important to understand that the filing of an appeal does not excuse the property owner from paying any taxes due on the assessment under dispute.
If an improvement is totally removed from the land, would there be a negative supplemental assessment and refund issued?
However, please note that for any given tax year, no matter how many supplemental tax bills you receive for that year in addition to the annual property tax bill, the amount of the property tax portion of all those bills cannot add up to more than what the taxes would have been if the full assessment had been reflected on the annual bill from the beginning, and it usually will be somewhat less than that amount.
I purchased a home in February 2008 from an owner who had just purchased it five months earlier in September 2007. I actually received a negative supplemental tax bill for the difference in market value for the four months from the time I bought it until June 30, 2008, but I also received a supplemental bill that was issued to the previous owner! Why am I responsible for his bill?
Example: Say the previous owner purchased the property on September 5, 2007, for $250,000. At that time, the assessed value of the property was $200,000. If no other supplemental events occur, the previous owner would later receive a supplemental assessment of $50,000 (the difference between the $200,000 roll value and the $250,000 market value at the time of purchase) and the increased tax would be $500 (1% tax rate x $50,000). However, since the supplemental tax bill covers only the nine months remaining in the fiscal year after the purchase (October 1, 2007 to June 30, 2008), the tax for that increase would be 9/12ths of $500, or $375.
You subsequently purchased the property during the same fiscal year on February 20, 2008, for, say, $240,000, and before the supplemental bill for the prior owner’s purchase of $250,000 had been issued. Under this circumstance, you will receive a negative supplemental tax bill and a regular supplemental tax bill.
The first supplemental tax bill will be for the difference between your purchase price of $240,000 and the previous owner’s September 2007 purchase price of $250,000. Your first supplemental assessment will result in a negative assessed value of $10,000, and the tax refund would be 4/12ths of a $100, or $33.34.
Your second supplemental tax bill will be for your pro-rata share of the $375 supplemental tax generated when the prior owner purchased the property back in September 2007. This will be based on the number of days of ownership you held the property during the current fiscal year. The prior owner owned it for 168 days (the number of days between September 5 and February 20). The prior owner’s pro-rata supplemental bill will be 168/365ths of $375 (roughly$173), and your pro-rata bill will be 131/365ths of the $375. Your second supplemental bill in this instance would be about $135.
Thus, you will receive a supplemental refund of approximately $33, and a supplemental tax bill in the amount of $135, while the prior owner will receive a single tax bill in the amount of $173.
Many people dislike pro-rata bills because they feel that they are being unfairly taxed; however, the pro-ration really covers the period of time they actually possess the property, and thus, is not unfair.
I received a supplemental tax bill in September. Will I still receive the annual tax bill within the next few months?
If I pay property taxes through an impound account with my mortgage payment, will my lender get my supplemental tax bill?
It is important to understand that if the supplemental tax payment is not made before the delinquency date of the bill due to a misunderstanding between yourself and your lender, the penalties cannot be excused. State law stipulates that this is not an acceptable reason for excusing penalties.
Lately I have had difficulty making ends meet financially. Can I make a partial payment on the second installment of my supplemental tax bill?
I just purchased my first home. Am I entitled to a homeowners' exemption on my supplemental tax bill?
If your newly purchased home is already receiving the full homeowners’ exemption for the current year, however, there will be no additional exemption granted for the supplemental assessment. Your new application for the exemption will then take effect for the next fiscal year.
Please note that an exemption cannot be applied to a negative supplemental assessment.
Example: On December 29, 2007, you purchased a home for which no homeowners’ exemption had been allowed. Because you are reassessed on the first day of the month following an ownership change, you will pay supplemental taxes for the six remaining months for the current fiscal year (January 1, 2008 to June 30, 2008). Assuming that your 2007-2008 supplemental assessment is in the amount of $20,000 and you file for and qualify for a homeowners’ exemption, the entire $7,000 exemption would be deducted from the supplemental assessment amount before the taxes are calculated and then will be prorated as follows:
Net supplemental assessment minus homeowners’ exemption times the tax rate times the proration factor for January = supplemental tax due:
$20,000 – $7,000 = $13,000
$13,000 x 1% = $130
$130 x .50 = $65 (supplemental tax due)
Yes. Supplemental assessments are eligible for the same property tax exemptions and assistance programs as are annual assessments. In addition to the homeowners’ exemption, the disabled veterans’ exemption, church exemption, welfare exemption, etc., are applicable. However, only one exemption per property may be granted per year.
I missed the 30-day filing period for the homeowners' exemption on my supplemental assessment. Can I still receive the exemption for this year?
Check your supplemental tax bill for the date on which the first installment of taxes on the supplemental tax bill becomes delinquent, as the date will vary depending on when the bill was mailed by the tax collector.