Practical guide to construction bidding

Construction bidding is the number one way contractors secure contracts and win projects. But even well-established, qualified teams can lose out on profitable work if their bidding strategy isn’t up to par. An effective bidding strategy helps contractors win profitable work and stay competitive

Bid too high, and companies risk losing the contract to a lower bidder. Bid too low, and profit margins erode. That’s the tension every contractor has to manage.

But how does bidding work? How can contractors balance competitiveness with profits? This is a practical guide to help operations leaders strengthen and refine their bidding strategies. Learn how the bidding process works, common types of bidding in construction, and what goes into a bid that wins work without giving away margin.

What is construction bidding?

Construction bidding is the process contractors use to compete for project work. An owner puts a project out for bid, and contractors respond with proposals built from plans and specifications that lay out price, scope, schedule, and approach. In its simplest form, it’s a contractor saying “I can complete this project on this timeline for this dollar amount.”

Bidding is a balancing act: Contractors want to bid low enough to be competitive but high enough to maintain profit margins on the job.

In many cases, the lowest price wins. This is especially true for public works projects, where most jurisdictions mandate that awards go to the most affordable qualified bidder. But this isn’t a hard-and-fast rule. Owners also look at scope coverage, past work performance, and timeline confidence when awarding a contract. A history of overpromising or underbidding inevitably leads to reputational damage and profit loss. For operations leaders, it’s about delivering accurate bids that account for actual labor burden, real subcontractor quotes, and schedule risk on the job.

Key phases in the construction bidding process

The construction bidding process generally follows a structured and consistent path. Understanding the flow and purpose of each phase helps contractors submit more accurate bids and decide which projects to pursue.

Bid solicitation

The owner solicits bids by advertising the opportunity to contractors, often through invitations to bid (ITBs), requests for proposals (RFPs), public postings, and direct outreach from owner to firm. This is typically how contractors discover projects. During this stage, operations leaders may review plans and specifications to understand what the project entails. 

Go/no go evaluation

Not every project is worth bidding on. The go/no go evaluation phase is when contractors determine whether the opportunity is promising enough to warrant calculating a full estimate, which can be a time-consuming process. They need to decide if the job aligns with their crew capacity, expertise, and schedule. 

Preparing a bid eats up significant estimating hours, and winning a job that isn’t the right fit can erode margins and damage important relationships. A disciplined go/no go approach to bidding means firms spend their valuable time bidding on the right projects.

Bid preparation/takeoff

The bidding contractor performs a quantity takeoff, using blueprints and specifications to estimate labor, materials, and equipment needs. Estimators calculate labor hours, size the crew, and pull quotes from subcontractors and suppliers. Good estimators rely on fully burdened labor costs and material cost data from past jobs so bids stay grounded in real numbers.

Bid submission

Bid packages must be submitted by fixed deadlines, usually through an online bid portal or a public sealed bid opening. Late or incomplete submissions typically get disqualified outright, regardless of the price.

Clear and organized presentation can strengthen a bid’s credibility. The way a contractor organizes the submission can have a big impact on the selection process, as many owners look at the full picture, not just the price.

Bid review and clarification

Once bids are submitted, owners evaluate each one and often ask specific questions and request revisions or clarifications. This is a critical part of the bidding process because the way a contractor responds can influence the owner’s decision. Even with a competitive price, a construction team can risk losing the project if they’re slow to respond or don’t provide sufficient answers.

Contractor selection and project award

At this point in the process, the owner carefully compares bids and selects a contractor. While the lowest price often wins out, it’s far from the only factor considered. Owners also look at firm reputation, timeline confidence, and potential risks when awarding a contract.

Contract execution

Once the owner selects a company, both parties review the contract, negotiate terms, and sign before project mobilization. Careful review is essential because payment terms and scope are fixed once both parties sign the contract. Then, the contractor receives a “notice to proceed,” which is a formal document that permits them to start the project. At this point, the selected contractor can start the construction planning process.

Types of construction bids

Here are the most common types of construction bidding:

• Open/public bidding: Any contractor that meets the qualifications can submit a bid, so margins tend to be tight and the lowest responsible bidder usually wins. Because most jurisdictions mandate this process, this is the standard model for public works.
• Selective/invited bidding: The owner or developer creates a shortlist of selected contractors that are allowed to bid. In these cases, reputation, specialized trades, and existing relationships may be just as important as price.
• Negotiated bidding: A single firm is chosen to collaborate with the owner on price and terms. Owners typically select contractors they’ve already worked with. They may also seek out a specific company for highly specialized projects.

What should be included in a construction bid?

A strong bid package presents a detailed breakdown of everything an owner needs to know to make an informed selection. This protects both the owner and the contractor, but only when bids are thorough and accurate. 

A bid package should outline the following:

• Total price and cost breakdown: The total contract price, along with a detailed breakdown of the material, labor, and equipment costs
• Scope of work: A clear and accurate description of what the contractor is going to deliver and how it aligns with blueprints, specifications, and project goals
• Exclusions: Everything not covered in the scope, like permits, taxes, and temporary power
• Timeline and schedule: A complete project schedule including start dates, timelines, milestones, and estimated completion
• Materials and labor details: An overview of materials, crews, and equipment needed
• Payment terms: An outline of how and when the contractor gets paid, including progress billing schedule, retainage (usually 5–10% held until completion), payment cycle, and change order terms
• Supporting documentation: A collection of documents that prove the bid is credible, including insurance certificates, bid bond (for public works), and EMR or safety records

Best practices to win construction bids

Accurate bids are the best way to earn a real profit, but construction is a notoriously unpredictable industry. A few habits separate contractors who consistently bid well from those that rely on guesswork.

Here are some best practices to keep in mind:

• Work with fully burdened job costs from past projects: Use fully burdened labor documentation from past projects to calculate reliable estimates.
• Understand the full scope before setting your price: Underestimating job scope is one of the primary reasons contractors underbid. Walk the site and ask about things the plans don’t show, such as utility locations, access and lay-down constraints, and trade sequencing with other contractors on site.
• Price for profit, not just to win: It’s common for contractors to get so focused on winning the bid that they forget the biggest priority: profitability. Utilize project-based accounting data from past jobs to establish a minimum margin and stick to it.
• Follow up after bidding submission: Check in with the owner or GC after submission to get clarification and show interest. If the bid is lost, ask why (e.g., price, scope, coverage, schedule). Specific feedback is more useful than a simple no, and following up opens lines of communication for future opportunities.

Strong bids come from cost visibility, not guesswork: knowing what past jobs actually cost so the next one can be priced with confidence. Miter gives contractors that visibility.

How Miter helps contractors bid more accurately

To create accurate bids, firms need dependable cost data from past projects. This includes direct and indirect costs, from labor and materials to overhead, broken down by job and activity. Practical visibility into fully burdened job costs is key to building accurate packages and avoiding margin depletion.

With Miter Time Tracking, Job Costing, and Payroll, operations leaders gain detailed insight into actual job costs, which allows them to work with real-world data, ensuring estimates are consistent and reliable and bids win work without giving away margin.