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Worker with Ladder
 How Our Calculator Works
​Simply enter the date you last supplied labour or materials to the project. Our calculator instantly provides:

  • The last day to preserve (register) your lien

  • The last day to perfect your lien by starting a court action

No more guesswork or sifting through statutes—just clear, actionable deadlines tailored to Ontario’s Construction Act.

 Who Should Use This Tool?

  • General Contractors

  • Subcontractors

  • Labourers

  • Suppliers

  • Project managers, architects, planners, etc.

  • Anyone involved in construction projects who hasn't been paid and may need to file a lien

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