Material Deviation or Irregularity

A material deviation or irregularity is a failure to meet a mandatory requirement of a solicitation that goes to the substance of the bid. It affects the scope, quality, performance, price, delivery, or the rights and obligations under the contract. It can also affect the fairness of the competition. Because of that, the buyer cannot waive it or let the bidder fix it after closing, and the bid is normally rejected as non-compliant.

The term separates serious defects from minor ones. Minor irregularities affect form rather than substance, and buyers may overlook or correct them. Material ones undermine contractual certainty or give one bidder an advantage over the others. Procurement manuals use the phrase "material deviation", while Canadian courts and municipal bylaws often say "material irregularity", "major irregularity" or "material non-compliance". The concept is the same.

How the United Nations and development banks define a material deviation

The United Nations Procurement Manual describes a material deviation as one that would substantially affect the scope, quality or performance of the goods and services. It also covers a deviation that would substantially limit the organization's rights or the bidder's obligations under the contract. A third case is one that, if rectified, would unfairly affect the competitive position of other bidders with substantially responsive offers.

The manual tells officials to screen offers early and reject those with material deviations, so that no effort is spent evaluating invalid offers. Its examples include a missing bid security, a missing submission form or signature where the solicitation makes these formal criteria, and technical non-conformity with specifications evaluated on a pass/fail basis. The same manual warns against disqualifying offers for minor deviations that are not material, because that would work against best value.

The Asian Development Bank and the World Bank use the same logic. A bid is substantially responsive only if it meets the bidding documents without material deviation, reservation or omission. Both treat as material any deviation that affects the validity of the bid, or whose correction would give the bidder an unfair advantage.

Material irregularity in Canadian courts and municipal bylaws

Canada has no single national definition. The concept comes from case law and from the procurement policies of individual public bodies. The Quebec Court of Appeal, building on Tapitec inc. v. Ville de Blainville, describes a material irregularity as a failure to comply with an essential or substantial requirement of the call for tenders that affects equality between bidders and the integrity of the process. Public bodies must reject a tender that contains one.

In British Columbia, the test for material non-compliance asks two questions. Did the bidder fail to address an important or essential requirement of the tender documents? Is there a substantial likelihood that the omission would have mattered to the owner when choosing a bid? Tender documents that label an item mandatory are prima facie evidence that it is material.

Municipal bylaws put the distinction in writing. The Town of Essex and the Township of Loyalist define a major irregularity as a deviation from the bid request that affects price, quality, quantity or delivery and is material to the award. Both require rejection or disqualification. Essex lists failure to meet mandatory requirements, unsealed bid envelopes, insufficient financial security, conditional bids and incomplete mandatory sections as major irregularities.

Minor irregularities that buyers can accept or correct

Canadian courts also protect bids that are substantially compliant. In Double N Earthmovers Ltd. v. Edmonton (City), the Supreme Court of Canada said that substantial compliance requires compliance with all material conditions of a tender, judged on an objective standard. A bid remains compliant if its departures are mere irregularities.

In Reaction Distributing Inc. v. Algonquin Highlands (Township), the Ontario Court of Appeal held that an unlabelled tender box and the lack of a sealed envelope were mere irregularities. Disqualifying the bidder on that basis breached the tender contract. Loyalist's policy treats minor irregularities the same way: they affect form rather than substance, are not material to the award, and may be corrected.

International guidance gives similar examples of correctable items, such as arithmetic corrections, missing signatures on nonessential forms and minor clerical errors. Failure to submit key documents needed to judge responsiveness is treated as material.

Examples of material non-compliance

• A perfunctory "we will comply" answer where the tender asked for a detailed plan on a substantive matter.
• Failure to include mandatory alternative prices.
• Failure to provide a preliminary construction schedule where the documents show it serves a material purpose.
• A conditional bid or insufficient financial security.
• A missing mandatory bid security or form.

Materiality depends on the facts. In one British Columbia context, missing equipment serial numbers and licence registration numbers, though expressly required, were held not to be material non-compliance. US public bodies use comparable tests. Hillsborough County treats a deviation as material if it deprives the county of assurance that the contract will be performed to requirements or gives the proposer an undue competitive advantage. The California State Contracting Manual adds significant effect on delivery, quantity, quality or cost.

What it means for a supplier bidding on Canadian public contracts

Treat every requirement the solicitation labels mandatory as a pass/fail gate. Check each one against your response before closing, because a material defect cannot be cured afterward. Do not add conditions or qualifications to your bid, answer each mandatory section fully, and submit all required forms, signatures and financial security. Where a requirement is unclear, resolve it with the buyer before closing rather than assuming it is minor.

Buyers on CanadaBuys also work with rules for changes after award, set out in the buyer's guide on design changes and deviations. Treasury Board policy also uses the phrase in accounting, where the Directive on Accounting Standards treats materiality as a matter of professional judgment and calls for policies that avoid material deviation from generally accepted accounting principles.