Give a Range vs a Firm Number: A Decision Tree
Why this matters
A firm number wins trust and closes deals, but only when you can actually deliver it. A range protects you on uncertain work, but a sloppy range reads as "I have no idea" and loses the job. Picking the wrong format costs you either margin (a firm price you cannot hit) or the close (a vague range that scares the customer off). This tree helps you decide which to give and how to give it well.
Start here: how certain is the scope?
Certainty drives the choice. The more you truly know, the firmer you should be. The more genuine unknowns, the more a range protects everyone. Work the branches.
Branch 1: Do you know the full scope and cost?
- If the work is fully visible, familiar, and you can build the cost confidently, give a firm number. Firmness signals competence and makes the yes easy. A range here just plants doubt and invites the customer to assume the low end.
- If real unknowns remain (hidden conditions, supplier prices you must confirm, work behind a wall), do not force a firm number. Move down.
Branch 2: Are the unknowns small or large?
- If the unknowns are minor and bounded, a firm number with a tight contingency or a clear conditions clause (see related) is usually better than a range. You stay confident while protecting yourself for the small surprise.
- If the unknowns could swing the price meaningfully, give a range. A range is the honest format when you genuinely cannot pin the number yet.
Branch 3: If you give a range, is it tight or wide?
The quality of a range is everything. A tight range builds confidence. A wide range destroys it.
- A tight range (top end a modest step above the bottom) tells the customer you know this work well and are protecting against a small variable. It reads as professional.
- A wide range (top end far above the bottom) tells the customer you are guessing. They hear the low end as the price and feel cheated when the real number lands higher, or they walk because the uncertainty feels risky.
- Rule: if your honest range is so wide it is useless, you do not have a pricing problem, you have a scope problem. Go investigate before you quote (open the wall, confirm the supplier price), then narrow it.
Branch 4: What is the customer comparing?
- If competitors are giving firm numbers and you give a wide range, you look unsure and lose. Match the format: tighten your range or do the work to give a firm number.
- If the job is genuinely complex and everyone bidding it knows there are unknowns, a well-explained range with a conditions clause is the credible, honest answer.
The comparison
| Factor | Firm number | Range |
|---|---|---|
| Scope certainty | High, fully known | Real unknowns remain |
| Size of unknowns | None or tiny | Meaningful |
| Customer signal | Confidence, easy yes | Honesty about variables |
| Main risk | Eating a surprise cost | Looking unsure if too wide |
| Best paired with | A clear inclusions list | A conditions clause |
How to give a range that still wins
A range is not a license to be vague. Make it land like a professional choice, not a shrug:
- Keep it tight. Narrow the spread by investigating first. The less you guess, the better it reads.
- Explain the variable in one sentence. "The bottom is if the line is clear, the top is if we find a blockage we have to clear. I will know once I am in there."
- Anchor on the likely outcome. "Most jobs like this come in toward the lower end." Honest expectation-setting, not a sales line.
- Convert to firm as soon as you can. "Once I open it up, I will give you the exact number before any extra work." That promise turns a soft range into a trustworthy process.
How to give a firm number that you can keep
- Only firm what you can see and cost. A firm price on a hidden unknown is a guess wearing a suit.
- Build in a small contingency for the minor stuff so a tiny surprise does not blow the number.
- State what is included so "firm" is not later disputed. The price is firm for that scope, and a real change in scope is a new conversation, disclosed up front.
The honest rule
Be as firm as the facts allow and no firmer. A firm number you cannot hit is a lie that costs you margin or trust. A range wider than the truth requires is laziness that costs you the close. Investigate enough to narrow the uncertainty, then choose the format the facts support.
References
- See related: Quote on the Spot vs Go Back: A Decision Tree
- See related: Estimating the Unknown: The Conditions Clause
- SBA (Small Business Administration), guidance on estimating and proposals
- Trade-standard practice on contingencies and scope-based quoting