What to know
- It's normal. State law requires the Assessor to reassess property when ownership changes or new construction is finished.[1]
- You may get two. If you bought between January 1 and May 31, the county issues two supplemental assessments, one for the rest of the current fiscal year and one for the next.[3]
- Pay it on time. Late supplemental bills get a 10% penalty.[2]
- It can look scary. The bill is based on the full jump in value, so after years of Prop 13 increases on the old owner's base, the difference can be large. It's a one-time catch-up, not your new yearly bill.
Budget for it when you buy. Ask your lender or me for an estimate before closing so it isn't a surprise.
Related questions
Does my mortgage company pay the supplemental tax bill?
No. San Diego County says supplemental bills are not sent to a lender for payment. The owner is responsible for paying them.
Why is my supplemental tax bill so high?
It's based on the difference between the old owner's assessed value and your purchase price. If they owned for a long time, that gap can be large.
Is a supplemental tax bill a one-time payment?
Yes. It covers the rest of the fiscal year at the new value. After that, your regular annual bill is based on the new value. You can get two if you closed between January 1 and May 31.
What happens if I don't pay the supplemental bill?
San Diego County adds a 10% penalty to unpaid supplemental bills.
Related answers, guides and reports
Still have a question?
Text me at (559) 977-2596. I answer every one myself, no pressure and no sales pitch.
Sources
- San Diego County Assessor: supplemental assessments
- San Diego County Treasurer-Tax Collector: supplemental taxes
- San Diego County Auditor: property tax FAQ
Payment math is an estimate, not a loan offer. Talk to a lender for your actual numbers. Josiah Garcia | Real Broker | DRE #02128093.