Researchers ran a simulated negotiation over the sale of a chemical plant and measured how much the final price depended on the very first number anyone said. The correlation was 0.85. The opening offer, before a single round of haggling, all but decided where the deal would land (Galinsky & Mussweiler, 2001).
The first number on the table is not a starting point. It is a center of gravity, and the rest of the negotiation quietly orbits it.
You have met this before
You already know anchoring as a bias: your brain grabs the first number it sees and adjusts from there, and the adjustment is almost always too small. That is the mechanism, covered back in the cognitive biases.
Here it stops being something that happens to you and becomes something you do on purpose.
At the table, the anchor is a weapon. The only question is whether you are holding it or standing under it.
When you say a number first, the other side starts adjusting from your number. They feel like they are pushing back hard. In reality they are still circling the figure you chose, fighting on a field you painted. Even a number they openly call ridiculous still drags them, because the brain cannot help but treat it as the reference point.
Make the first offer
There is a popular belief that you should let the other person go first so they “tip their hand.” The research says this is mostly backwards.
Across all three of Galinsky’s experiments, whoever made the first offer got the better outcome. The first number set the anchor, and the anchor did the heavy lifting through every round that followed.
| The folk belief | What the evidence shows |
|---|---|
| “Let them go first so they tip their hand.” | In all three experiments, whoever offered first won. |
| “Naming a number boxes me in.” | The number becomes their ceiling, not your cage. |
Silence is a choice, and usually the losing one. Waiting for them to name a number just hands them the anchor.
Except when you are flying blind
The advantage flips in exactly one situation: when the other side knows far more about the true value than you do.
Anchor first while ignorant, and two things go wrong:
- You might anchor in the wrong direction entirely, cheerfully offering 40 for something they would have gladly let go for 25.
- Your number leaks what you know, and what you want.
So the rule has a clean shape:
| Your knowledge of the real value | What to do |
|---|---|
| You have a decent sense of it | Anchor first. Set the gravity. |
| You are flying blind | Let them open, and read their number as information. |
Anchor when you can see the field. When you cannot, let them light it up first.
How to throw an anchor that holds
Two things decide whether an anchor pulls or just gets ignored.
1. Aggressive, but still credible. The anchor should sit near the edge of what you can defend, not past it. A wildly insulting number gets dismissed, or ends the conversation, and loses all its pull. You want a figure high enough to make them flinch, reasonable enough that they keep talking.
2. Precise beats round. This is the sharpest finding in the field. A first offer of $9,800 anchors harder than $10,000 (Mason et al., 2013).
Why would a more specific number have more power?
- A precise figure signals you know the value. It reads as the output of real calculation, so the other side assumes it is well-founded.
- Believing your number is grounded, they adjust away from it less.
- A round number reads as a guess, and people feel free to swing hard against a guess.
| Your opening | It reads as | They adjust |
|---|---|---|
| “about $200k” | a guess | freely, they swing hard |
| $197,500 | a calculation | barely, they assume you know |
“About 200k” invites a fight. “$197,500” sounds like someone who knows something you do not.
How to survive being anchored
Once their number is on the table, you cannot un-hear it. But you can refuse to play on their field.
Picture a salary talk. They open with “the band tops out at $90k.” Reply “could you do $95k?” and you have already lost, because you just accepted their ceiling and asked for a tip. The whole conversation now lives inside their number.
| Defense | Why it works |
|---|---|
| Don’t counter near their number | Replying 90 to their 100 just argues the discount on their anchor. You are still on their field. |
| Re-anchor | Your own aggressive number on the opposite side drags the midpoint back toward fair. |
| Refocus on your target and walkaway | Galinsky’s antidote: keep your attention on your number and your best alternative, not theirs. |
| Name it | “That figure isn’t based on anything we both recognize, so let’s start from the comparables.” Resets the frame. |
An anchor wins by capturing your attention. Move your eyes back to your own target, and its pull weakens.
Why this matters
- The anchor does not have to be fair to work. It only has to be first and credible.
- Precision is free leverage. Same ask, sharper number, stronger pull.
- You are always anchored by something. If you did not set it and they did not, the listing price, the last salary, or some random comparable did it for you.
- The defense is attention, not cleverness. Anchors win by capturing your focus. Keep your eyes on your own target and the spell weakens.
Negotiation rarely starts when the haggling starts. It starts the moment someone says the first number, and that someone should usually be you.