Tax payment deadlines are the dates by which property taxes must be paid to avoid penalties and interest charges. Deadline structures vary by municipality: some have single annual deadlines, others have quarterly or monthly installment due dates. Payment deadlines are established by municipal bylaw and communicated on tax notices. Meeting deadlines avoids penalties (often 5-15% of unpaid amounts) and interest charges. Deadlines are typically firm, though some municipalities may waive penalties for first-time late payments or documented hardship. Pre-authorized payment plans automatically ensure deadline compliance. Understanding payment deadlines and using installment or pre-authorized options helps property owners avoid unnecessary penalties while managing cash flow.