Purchase assessment
A sale can trigger reassessment based on applicable California property-tax rules.
California property taxes
Property taxes can materially change the real monthly housing payment.
Mortgage calculators often underestimate California housing cost when property-tax assumptions are too low or based on the seller's current tax bill instead of the buyer's expected assessment.
Base tax
Local tax rates vary, and assessments may include more than a simple statewide base percentage.
Special assessments
Mello-Roos, bonds, assessments, and other local charges can increase the effective tax rate.
Escrow
Property taxes may be collected monthly through an escrow account depending on the loan and borrower choice or requirement.
Calculator assumptions
Use an adjustable annual percentage rather than relying on a generic national tax estimate.
Verify the property
Actual tax history and local assessments should be reviewed when evaluating a specific home.