Holdback vs Security Bond

Both protect against work that never gets finished or paid for, but they are different animals: the holdback is a statutory deduction every payer on an Ontario construction project must retain, while performance security — typically a bond — is contractual protection the buyer demands from the contractor against default.

The holdback: statutory, and owed to the lien system

Ontario's Construction Act defines "holdback" as 10 per cent of the value of the services or materials supplied under a contract or subcontract, required to be withheld from payment under Part IV. Section 22(1) obliges each payer — owner, contractor, subcontractor alike — to retain that 10% basic holdback as supplies are actually delivered, and s. 22(2) adds a separate 10% holdback on finishing work after substantial performance. The obligation applies whether or not the contract provides for partial payments or payment on completion. The point of the money is the lien system: it stays withheld until liens that may be claimed against it expire or are satisfied, and s. 23 makes an owner personally liable for required holdbacks to lien claimants with valid liens.

Performance security: contractual, and owed to the buyer

Federal buyers instead set contract security through the SACC Manual. Clause E5000C requires the contractor, within a set number of days after award, to provide a duly executed performance bond on form PWGSC-TPSGC 505 for a stated percentage of the contract price — the clause's stated purpose is ensuring funds will be available to complete the work if the contractor fails. Clause E0007C lets the buyer require combinations instead: a performance bond (form 505), a performance bond plus a labour and material payment bond (form 506), a payment bond plus a security deposit, or a security deposit alone, each for a stated percentage. Bonds must come from surety companies approved to provide surety within Canada. The beneficiary is Canada (the buyer) — not the subcontractors.

The key differences

Source: the holdback is imposed by statute; performance security exists only because the contract requires it. Who is protected: the holdback secures lien claimants down the supply chain; the bond secures the buyer against the contractor's default. Who bears it: every payer on an Ontario improvement retains a holdback, at every tier; performance security is a single obligation of the prime contractor. Amount: the holdback is fixed at 10% by statute; the bond percentage is whatever the buyer specifies in the solicitation. The two coexist: an Ontario public construction contract can carry a statutory holdback and a contractual performance bond at the same time.

Common questions

Can the holdback itself be provided as a bond?

Yes. Section 22(4) of the Construction Act allows some or all of a holdback to be retained, instead of cash, as a letter of credit in the prescribed form or a demand-worded holdback repayment bond in the prescribed form. That is a different instrument from a performance bond — it backfills the lien protection, not default protection.

Which one applies on a federal project in Ontario?

Ontario's holdback regime attaches to improvements on Ontario land; the SACC financial-security clauses apply where the federal buyer requires security. A federal construction contract in Ontario can therefore involve both the statutory holdback and SACC-required bonds — the two answer different questions and do not substitute for each other.

Related definitions

Performance security · Retainage vs. holdback · Holdback release timing · Bid bond vs. performance bond