Yes No Share to Facebook
Payment Holdback Required:
Construction or Renovation Relations
Last Updated: August 22 2026
Question: Is it illegal in Ontario to pay a construction final invoice in full without a statutory 10% holdback?
Answer: Vescio Legal Services can help you understand Ontario’s required construction holdbacks and the risk of paying final invoices in full without retaining the money, which may be unlawful under the Construction Act. Under Construction Act, R.S.O. 1990, c. C.30, owners and other payers on a contract or subcontract under which a lien may arise generally must retain a basic 10% holdback from amounts due for services or materials as they are actually supplied, and a separate 10% holdback may apply after substantial performance; this obligation applies regardless of whether the contract provides for partial payments or payment on completion, and owners can be personally liable for required holdbacks to valid lien claimants. If you already paid in full, or you’re facing a dispute over missing holdback funds, call (416) 400-8255 to discuss your options with Vescio Legal Services, a paralegal-serving Ontario resource for construction payment and holdback issues.
Add this website to Google Preferred Sources
Statutory Required Payment Holdbacks
Why It Is That Paying the Final Invoice In Full Upon Project Completion Is Actually Illegal
In the realm of construction work or renovation projects, paying an invoice in full without retaining a holdback may be against the law. While it is generally perceived that failing to pay an invoice in full is considered a breach of contract, for business within the contracting trades paying an invoice in full is likely unlawful. A holdback from full payment is required for the protection of suppliers who may go unpaid by the party above within the supply chain.
The Law
As per the Construction Act, R.S.O. 1990, c. 30, which prior to July 1 2018 was known as the Construction Lien Act, the owner of a project involving improvements to property, thus being any type of property including residential, commercial, industrial, agricultural, among other types, is statutorily required to holdback ten (10%) percent until the time within which a lien may be preserved expires. Furthermore, where a project owner fails to properly holdback payment as statutorily required, the project owner may be held liable for payment to any and all subcontractors, subtrades, suppliers, among others, who were unpaid by the contractor or subcontractors along the chain of supply. Specifically, the Construction Act states:
Holdbacks
Basic holdback
22 (1) Each payer upon a contract or subcontract under which a lien may arise shall retain a holdback equal to 10 per cent of the price of the services or materials as they are actually supplied under the contract or subcontract until all liens that may be claimed against the holdback have expired or been satisfied, discharged or otherwise provided for under this Act.
Separate holdback for finishing work
(2) Where the contract has been certified or declared to be substantially performed but services or materials remain to be supplied to complete the contract, the payer upon the contract, or a subcontract, under which a lien may arise shall retain, from the date certified or declared to be the date of substantial performance of the contract, a separate holdback equal to 10 per cent of the price of the remaining services or materials as they are actually supplied under the contract or subcontract, until all liens that may be claimed against the holdback have expired or been satisfied, discharged or otherwise provided for under this Act.
When obligation to retain applies
(3) The obligation to retain the holdbacks under subsections (1) and (2) applies irrespective of whether the contract or subcontract provides for partial payments or payment on completion.
Permissible forms of holdback
(4) Some or all of any holdbacks may, instead of being retained in the form of funds, be retained in one or more of the following forms:
1. A letter of credit in the prescribed form.
2. A demand-worded holdback repayment bond in the prescribed form.
3. Any other form that may be prescribed.
Personal liability
23 (1) Subject to subsections (2), (3) and (4), an owner is personally liable for holdbacks that the owner is required to retain under this Part to those lien claimants who have valid liens against the owner’s interest in the premises.
Limitation
(2) Where the defaulting payer is the contractor, the owner’s personal liability to a lien claimant or to a class of lien claimants as defined by section 79 does not exceed the holdbacks the owner is required to retain.
Same
(3) Where the defaulting payer is a subcontractor, the owner’s personal liability to a lien claimant or to a class of lien claimants as defined by section 79 does not exceed the lesser of,
(a) the holdbacks the owner is required to retain; and
(b) the holdbacks required to be retained by the contractor or a subcontractor from the lien claimant’s defaulting payer.
How determined
(4) The personal liability of an owner under this section may only be determined by an action under this Act.
Per the Construction Act as shown above, a ten (10%) percent holdback is required by each party within the hierarchy of a project to improve property, which includes construction or renovation projects. Accordingly, the property owner is required to holdback ten (10%) percent from the general contractor who in turn is required to holdback ten (10%) percent from subcontractors and so on throughout the various layers of payors to suppliers of the project. This holdback requirement expires when the risk of a lien being filed against the improved property expires which is, generally, sixty (60) days following completion of the project or completion of substantial performance (which is established by the issuance of a Certificate of Substantial Performance).
Interestingly, and most contractors will know this; however, small project owners, such as homeowners as laypeople will unknowing, the homeowner that pays the invoice from a contractor in full upon completion of a renovation contract, whether roofing, landscaping, building an addition, replacing kitchen cabinetry, or other household improvements, is required to holdback ten (10%) percent. Failing to do so is a breach of trust whereas the Construction Act, statutorily, creates a trusteeship and by failing to act in accordance to the trusteeship, the homeowner, among others, could be found liable for breach of trust.
Conclusion
Owners of projects, along with everyone throughout the supply chain, from contractors to subcontractors, and so on, are required to holdback ten (10%) percent of payment upon the completion or issuance of a Certificate of Substantial Completion. Generally, the holdback provision expires after sixty (60) days.
NOTE: A significant quantity of online searches featuring “lawyers near me” or “best lawyer in” usually signify a demand for prompt and effective legal support rather than an exact job title. In Ontario, licensed paralegals are monitored by the same Law Society that regulates lawyers and have the authority to represent clients in certain litigation matters. Skills in advocacy, legal analysis, and procedural knowledge are pivotal to that function. Vescio Legal Services offers legal representation within its licensed parameters, focusing on strategic planning, evidence preparation, and compelling advocacy aimed at achieving swift and beneficial outcomes for clients.