Ontario property tax: where it goes
A Ontario house pays 1.093% of its taxable value in property tax. For a house at $350,114 of value before exemptions with the homeowners' exemption, that's about $3,751 a year.
Tax is levied on the assessed value (Prop 13).
Who taxes this house
| Taxing agency | Rate | On $350,114 |
|---|---|---|
| 1% general levy (countywide) | 1% | $3,431 |
| Ontario-Montclair School District bonds (schools) | 0.0463% | $159 |
| Chaffey Union High School bonds (schools) | 0.022% | $75 |
| Chaffey Community College bonds (schools) | 0.0165% | $56 |
| Metropolitan Water District | 0.0085% | $29 |
| Total | 1.093% | $3,751 |
2026-27 tax year, San Bernardino County (Ontario-Montclair tax rate area 004-000). Exemptions applied: Homeowners' exemption ($7,000).
Dates
| When | What |
|---|---|
| Nov 30, 2026 (in 39 days) | Last day to file a 2026 regular assessment appeal in San Bernardino County (filing runs July 2 to November 30, 2026). |
| Dec 10 (in 49 days) | First property tax installment (due Nov 1) is delinquent after Dec 10: 10% penalty. |
| Feb 15 | Last day for a first-time homeowners' exemption claim to get the full exemption for the year. |
| Apr 10 | Second property tax installment (due Feb 1) is delinquent after Apr 10: 10% penalty. |
Pay or manage it
Sources
- San Bernardino County 2026-27 property tax rates (Attachment A)
- San Bernardino County Resolution 2026-133 (2026-27 tax rates)
- California BOE Publication 29: property tax overview
- California BOE: homeowners' exemption
- San Bernardino County Clerk of the Board: assessment appeals
- San Bernardino County parcel layer (assessor land and improvement values)
Checked October 22, 2026. Every number here comes from the public sources listed, matched by our checker.
Rates change every year; this page shows when it was last checked. Nothing here is legal, tax or insurance advice.