Google Ads Cost per Lead for Contractors: Measure Cost per Qualified Bid

A published Google Ads cost per lead for contractors would tell you very little, because a call about a deck repair and a call about a two-story addition cost the same click. Run your budget on cost per qualified bid, then cost per signed contract. You can work out both from your ad account and your construction CRM.

Cost per lead vs cost per booked qualified bid

Cost per lead divides spend by every call, form and message. Cost per qualified bid divides it only by the projects you decided were worth pricing. For a general contractor that gap is wide, because pricing an addition, a custom home or a tenant build-out takes a site walk, sub quotes and a takeoff.

Lead : Every ad call that lasts past your minimum length, plus every form and message. Repair requests, subs looking for work, supplier reps and owners with no plans yet all count.

Qualified bid : A project you agreed to price because the scope, the property, the start window and the budget all fit. This is the unit you are really buying.

Signed contract : The deal itself. It can land months after the first click, once financing, permits or a lease come through.

That gap is where ad reports go unchecked. Google Ads records a call or a form as a conversion (Google's conversion help), yet it has no idea whether your estimator judged the project real. That judgment sits in Buildertrend, JobTread or Procore. Until the ad account and the CRM are joined, neither you nor whoever runs your ads can verify a claim that leads are up.

Calculating your number

1. Count calls and forms as conversions. Put call tracking on both the ads and the website (Google's call tracking setup), and count a form only when it is submitted, not when the page loads.
2. Tag the source in your CRM. Every new lead gets its channel and campaign when it is entered, by the office or automatically.
3. Mark the bid decision. When the estimator decides to price a project, mark the lead as a qualified bid. When it signs, mark the contract value.
4. Divide spend by each count. Use the same date range for spend and outcomes, campaign by campaign, so a strong addition campaign does not hide a weak commercial one.
5. Work out what a qualified bid is worth. Multiply the gross profit on a typical contract by the share of qualified bids you win. Your cost per qualified bid needs to sit well under that.

A worked example (hypothetical numbers)

These round numbers are an example, not a benchmark. Say you run two campaigns for a month:

On cost per lead, the additions campaign looks two and a half times better. On signed contracts, it is the weaker one, because most of its calls never earned a bid. Now say a typical contract leaves you $40,000 in gross profit and you win one qualified bid in five. Each qualified bid is worth about $8,000 to you, so paying $500 for one is comfortable. If the same campaign drifted to $4,000 a qualified bid, you would want to know before building season, not after.

Why costs rise around spring and summer building season

Costs rise because more contractors bid on the same searches while owners plan their projects, and much of that planning happens over the winter. Families settle on an addition before spring, and a business owner signs a lease and needs the build-out done before opening day. Ad auctions get crowded in those weeks.

A second cost is easy to miss. In late spring your crews fill up, but the campaigns keep spending at peak prices. A qualified bid you cannot staff until next year is worth far less than one you can start in six weeks. Read your backlog alongside your ad report every month.

Lowering cost per booked qualified bid

The cheapest way to lower it is to stop paying for leads that never become bids, then let Google learn from the leads that do.

• Split campaigns by project type. Additions, new homes and commercial build-outs attract different searches and close at different rates. Separate budgets show which one earns its spend.
• Block the work you will not price. Negative keywords for repairs, single trades, jobs and do-it-yourself searches keep those clicks off your bill (negative keywords). The Google Ads keyword guide for contractors has a starter list.
• Send each campaign to its own page. An addition ad should land on addition projects, your process and a short form that asks about plans, timing and budget. See Google Ads landing pages for contractors.
• Feed qualified bids back into Google Ads. Once your CRM marks qualified bids, they can be imported as a conversion, so automated bidding chases projects you price rather than every phone call.
• Answer the same day. An owner collecting three bids may stop once three contractors have called back.
• Turn spend down when the backlog is full. Keep brand terms running and pull back on the rest until you can staff new work.

How VETS Growth Marketing helps

We connect your Google Ads account to the CRM you already run, define what counts as a qualified bid with your estimator, and report cost per qualified bid and cost per signed contract by campaign. The ad account, the tracking and the data stay in your name. The setup is a project with a finish date, and every month after it you see which campaigns paid for themselves. Bring last season's spend and bid log to a growth consultation and we will calculate your real cost per qualified bid together.