The estimate that taught me to never trust a "we will figure it out as we go" job

Every trade owner I have worked with over the past 8 years has one job that taught them this lesson. The exact details vary. The pattern does not.

Here is the pattern, the three clauses that prevent it, and a story that came up in a conversation with a Calgary general contractor last winter.

The pattern

It starts the same way every time. A returning customer or a strong referral. The job sounds straightforward. A basement reno, a kitchen rebuild, a garage conversion. The customer says some version of: "we will figure out the details as we go."

That sentence is the warning sign. Every owner who has been in the trades for more than 5 years can tell you what happens next, because they have lived it.

Week 1. Customer changes the cabinet style. Adds an extra outlet on the island. Wants the framing inspector earlier than scheduled. None of it is a big deal. None of it is in writing.

Week 4. Customer wants to move a wall they agreed to keep. Changes the flooring. Has friends over to look at the work and now has "thoughts." Still nothing in writing.

Week 8. You hand over the invoice. The customer says: "I do not remember agreeing to half of this." You walk through every change. They push back on each one. The conversation gets heated. You end up writing off 30% of the invoice just to get paid for the rest.

I have heard this story, with slight variations, from probably 30 different owners. The dollar amounts range from $4,000 to $45,000. The pattern is identical. It often starts with one of the warning signs I covered in customer underpayment patterns.

The Calgary GC story

A general contractor I talked to last winter walked me through one of his. He had a 9-week basement reno that turned into 19 weeks. The customer was a friend of his wife. Every week brought new "small changes." By the time he was done, he had eaten $22,000 in unbilled work. He paid for it out of his line of credit and spent the following summer trying to recover.

His exact words, which I wrote down: "I have done this for 18 years. I knew better. I let it happen because the customer was a friend and I trusted the handshake. Never again."

Three months later, his shop had three things in every contract that he showed me. I am going to share them.

The three clauses that prevent this

1. The scope freeze clause.

The contract spells out exactly what is included in the price, line by line. Anything not on the list is a change order. The clause states explicitly: "Any work not described in this scope of work requires a written change order signed by both parties before work proceeds."

The point is not the legal protection. The point is the conversation it forces. When the customer says "can you just add a few outlets while you're there," you say "happy to. Let me draw up the change order." Suddenly they decide they do not need the outlets, or they decide they do but they understand it costs $400. Either way, you are not eating it.

2. The change order rate clause.

Change orders are priced at 1.5x your normal hourly rate, plus a $150 administrative fee. This is industry-standard for shops that have learned the lesson, and customers accept it without much pushback once it is explained: "Change orders disrupt our schedule and require us to re-sequence material orders. The premium reflects that."

The rate also has a psychological function. It makes the customer think twice before requesting changes. A "small change" that is going to cost them $400 stops being a small change. They make fewer of them. The ones they do request are the ones that actually matter. The shops that have figured out their pricing across the board (see what 50 Canadian plumbers actually charge) are the same ones running tight change order policies.

3. The payment milestones clause.

For any job over $5,000, payment is broken into milestones tied to phases of the work. Typical structure: 30% deposit, 40% at framing/rough-in complete, 30% at substantial completion. Never let the unpaid balance at any point be larger than what you can afford to lose.

The shops I know that take 100% on completion get burned the most. The shops that bill in milestones rarely have collection problems, because the customer has skin in the game throughout.

The deeper lesson

When a customer says "we will figure it out as we go," what they are really saying is "I am not sure what I want, and I would like to figure that out using your time and money." There are exactly two responses to this:

• "Happy to. Let's do a discovery phase first. I will bill you hourly for the design conversation, and we will lock the scope before any construction starts."
• "Let me know when you have a clearer picture and I will come back out to quote."

Either of those is fine. What is not fine is starting work without a locked scope.

I know this is harder than it sounds. The customer is in front of you. They want to start next week. You want the work. The shop down the street will do it without the scope freeze. So you tell yourself this customer is different.

They are not different. They never are. The owners who learn this lesson early are the ones whose businesses scale. The ones who learn it three or four times are the ones working 70-hour weeks at age 50 with nothing in the bank.

Lock the scope. Charge for changes. Bill in milestones. Every owner I know who is thriving in 2026 does all three.