What is the tax rate? When are taxes due? How is property assessed?

Property tax & assessment — Cornwall, Ontario: By-law 2025-038 — 2025 Tax Rates and Levy of Taxes

In the City of Cornwall, Ontario, property tax & assessment rules are set by By-law 2025-038 — 2025 Tax Rates and Levy of Taxes, verified 2026-10-28. Due dates: Two equal instalments not later than the 31st day of July and the 29th day of August. Penalty interest: 1.25% per calendar month or fraction thereof until the 31st day of December of the year in which the instalment is due or until paid, whichever first occurs.

By-law 2025-038 — 2025 Tax Rates and Levy of Taxes adopted bylaw

tax rate	Multiple property class rates per Schedule A; e.g. Residential Taxable Full combined rate 0.01910176; Multi-Res Taxable Full combined rate 0.03182684; Commercial Taxable Full combined rate 0.04290151; Industrial Taxable Full combined rate 0.05501372; Farmlands Taxable Full combined rate 0.00477544	Schedule A — 2025 Tax Rates and Levy
due dates	Two equal instalments not later than the 31st day of July and the 29th day of August	s. 9 — "paid into the office of the Treasurer in two equal instalments not later than the 31st day of July and the 29th day of August"
penalty interest	1.25% per calendar month or fraction thereof until the 31st day of December of the year in which the instalment is due or until paid, whichever first occurs	s. 10 — "penalty, interest of 1.25% per calendar month or fraction thereof"

scout note

City of Cornwall by-law setting 2025 tax rates and levying taxes under Municipal Act s.312 (residential municipal 0.01757176, combined 0.01910176); levy reduced by interim levy; includes BIA levies.

Pay Your Property Taxes — City of Cornwall

States interim instalments due last business day of March and April, final instalments last business day of July and August; 1.25% penalty on dishonoured payments.