How does "Use the Ackerman bid sequence: 65%–85%–95%–100% of target" work?

The sequence of decreasing concession sizes (starting at 65% of your target, moving to 85%, 95%, 100%) communicates information nonverbally: the reducing step size signals that each concession costs more, implying you are near your floor. The counterpart experiences the negotiation as extracting hard concessions even when you end at your planned target. Equal-step concessions signal unlimited room; decreasing steps signal a real limit.

How does "Use precise, non-round numbers in final offers" work?

Round numbers (50,000, 100,000) read as placeholders — starting points waiting to be negotiated. Precise non-round numbers ($47,800; $63,250) signal that you have done specific calculation — that the number comes from a real constraint or analysis. This increases the perceived legitimacy of the number and reduces the expectation of further movement.

How does "Accompany your final offer with a small non-monetary concession" work?

A final offer accompanied by a small non-monetary addition (a service, a timeline accommodation, a minor term) signals sincerity — you are giving something additional, which signals that you cannot give more on the main number. It also gives the counterpart a face-saving element: they can point to having extracted something beyond the number, even if the number is what you planned all along.

How does "Maintain empathy and calibrated questions throughout the Ackerman process" work?

A mechanical bid sequence without relational warmth reads as a script, which triggers the counterpart’s suspicion and resistance. Ackerman is a framework for the substantive offers; tactical empathy and calibrated questions ("How am I supposed to do that?" / "What makes that work for you?") are the relational container that makes each bid land as a genuine human conversation rather than a technique.

How does "Rehearse the full Ackerman sequence before high-stakes negotiations" work?

High-stakes negotiation produces cognitive and emotional load that degrades in-the-moment decision-making. Rehearsal moves the sequence — numbers, responses to counteroffers, empathy phrases — into procedural memory, freeing working memory for the dynamic elements: reading the counterpart, noticing new information, and adapting. The preparation is the source of the poise that experienced negotiators display.

Chris Voss

What is the Ackerman method in negotiation and how do you use it to make offers?

Sequenced bidding, calibrated concessions, and the psychology of closing

Short answer

The Ackerman method, popularized by Chris Voss in Never Split the Difference, is a structured offer-and-counteroffer system. You set a target price, then make a sequence of calculated bids that converge on that target with decreasing increments — signaling that you are near your limit even as you create the appearance of flexibility. The method uses psychology to make your counterpart feel they have won a hard bargain.

Most negotiators concede in equal steps — which signals that more is available. The Ackerman method, drawn from FBI hostage negotiation and commercial deal-making, uses decreasing concession size and deliberate non-round numbers to signal genuine limits. The counterpart feels they have extracted maximum concessions — even when you have stayed close to your target. These practices break down how and why the method works.

The practices (6)

Why it works

First numbers anchor subsequent judgments — even arbitrary ones. Without a pre-committed target, your counterpart’s opening offer becomes the reference point your brain adjusts from, systematically pulling you toward their desired outcome. Establishing your target before any numbers are on the table immunizes you against their anchor.

How to do it

1Before the negotiation, set a specific target — not a range, a number — based on research and your BATNA.
2Set a separate walkaway point below which no deal is better than the alternative.
3When the counterpart makes an opening offer, anchor your counter from your pre-set target, not from their number.

Evidence

RCT / meta-analysis

Anchoring effects in numerical negotiation are among the most replicated findings in behavioral economics. Pre-commitment to independent targets is the standard debiasing recommendation.

Honest caveat: Complete immunity to anchoring is not achievable — pre-commitment reduces but does not eliminate the effect. Knowing about anchoring helps moderately but not fully.

— Galinsky & Mussweiler (2001), "First offers as anchors", Journal of Personality and Social Psychology

Common mistake: Treating your target as a range ("somewhere around $X") — vague targets provide no anchor and leave you drifting toward whatever the counterpart suggests.

Go deeper on this practice →

Practice this with IX Coach

Reading about a practice changes nothing on its own. IX Coach turns these into a guided, adaptive routine — discerning where you are in real time and walking the practice with you, session after session.

Start with IX Coach →