Winning a public bid is less about salesmanship and more about following the instructions exactly. The owner has written a tender document that tells you what to price, what to submit, and how you will be judged, and a bid that gets every detail right almost always beats a cheaper bid that slips up on a mandatory requirement. So the real work of bidding is reading the documents carefully, building a compliant submission, and delivering it before the clock runs out. This guide walks through how to read a request and put a clean bid together. For the wider picture of how tendering works, start with Bidding for Public Work: the Basics.
First, identify the document type
The first page tells you how you will be scored, and that changes how you prepare.
- ITQ or RFQ (invitation or request for quotation): lowest compliant price wins, simple defined scope. Price tightly and submit on the owner's form.
- ITT or ITB (invitation to tender or bid): lowest compliant price on a fully specified construction scope. Most trade tenders are here.
- RFP (request for proposals): scored on technical merit plus price. You are writing a proposal, not just a number, and the methodology, team and safety record all carry marks.
- RFPQ or prequalification: no contract is awarded yet, this is the screening round (see Prequalification and Vendor Registration).
Read the document in the right order
Tender documents are long, but a disciplined reading order saves you from pricing the wrong thing.
- Instructions to bidders. This sets the closing date and time, the delivery method, the bid security required, the irrevocability period and the rules for questions. Read it first because it governs everything.
- Scope of work and specifications. What you are actually building, to what standard.
- Drawings. Cross-check them against the specs; where they conflict, the documents usually state which governs.
- The bid form. The exact form the owner will accept. Note every line you must fill, every unit price, and the signature and authority block.
- Special and supplementary conditions. These override the general conditions and are where the traps hide: liquidated damages, schedule, insurance limits, bonding and any local-content or safety requirements.
- Evaluation criteria. On an RFP, this is the marking scheme. Write to it, point by point.
Mandatory criteria are pass or fail
Public tenders separate mandatory requirements from rated ones. A mandatory requirement is pass or fail: miss one and your bid is rejected no matter how good the price. Common mandatory items are a workers' compensation clearance certificate, a certificate of insurance naming the owner as an additional insured, a safety certification where the buyer requires it, the bid security in the correct form and amount, and acknowledgement of every addendum. Build a checklist from the document's own submission requirements and tick each one before you seal the bid.
Watch the addenda to the very end
During the bid period the owner issues addenda to answer questions and correct errors, and they often change scope or price. Check the portal every day as the deadline nears. Your bid must acknowledge each addendum, usually by number and date on the bid form. A bid that does not pick up the final addendum is one of the most common disqualifiers, and it sinks contractors who priced the job perfectly but stopped checking too early.
Price the bid as a binding offer
Once the tender closes your bid is a legal offer you cannot simply withdraw. It stays open, or irrevocable, for the period named in the instructions, commonly 60 days and sometimes 90 or more on larger jobs. If you backed it with a bid bond and then refuse the contract, you forfeit on the bond (bonding is covered in Bonding and Surety and Surety Bonds Explained). Price every line as if you will have to do the work at that number, because you will.
Submit clean, and submit early
Deliver the bid by the exact method stated, to the named office, before the closing time. Portals log the timestamp to the minute and there is no discretion: one minute late is rejected. Sign the bid form with someone who has authority to bind the business, fill every unit price (a blank line can void the form), and do not alter the form's structure or attach qualifications like "we exclude X" to a lump-sum tender. Submit ahead of the deadline so a slow upload or a printer jam does not cost you the job.
How owners judge compliance
Under Canadian bid law, set out in Double N Earthmovers v. Edmonton (2007 SCC 3), an owner is not required to look behind a bid that appears compliant on its face. But material non-compliance, such as a wrong price structure or a bid signed without authority, cannot be waived. Immaterial slips that do not affect the price comparison sometimes can be. The lesson is simple: do not gamble on a waiver, get it right the first time.
Common mistakes
- Pricing before reading the instructions. The instructions to bidders govern the whole submission. Read them first.
- Missing a mandatory item. A lapsed insurance certificate or a missing clearance is an automatic reject, regardless of price.
- Stopping addenda checks too early. The last addendum often lands days before close and must be acknowledged.
- Altering the bid form. Changing its structure or leaving a unit price blank can void the bid.
- Qualifying a lump-sum bid. Excluding scope the tender asked for is a disqualifier, not a clever hedge.
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