Under current California law, after there is a change in ownership of a home, the property is reassessed.
The supplemental bill is paid by the buyer of the home and covers the difference between the previously assessed value taxes and the newly assessed value when you purchased the home.
Think of it as a catch-up bill.
For example, the home you just purchased was last sold back in 1970 for $50K, you now bought that home for $750K.
The supplemental tax bill covers the difference between the $50K and $750K.
The tax in this example is going to be around $5,000.
You may see the supplemental bill within a few months of buying your home.
You may also receive a supplemental tax bill for changes that add property value, like adding square footage or special features like a swimming pool or fireplace.
