The Never Split The Difference Files · #09 · ~5 min read
Bargaining Hard Without Being an Adversary: The Ackerman Model
Based on Chris Voss's Never Split the Difference, Chapter 9, "Bargain Hard."
Everything in this series so far has been about rapport, reading emotion, and honest technique. This chapter is the corrective to a misreading that could easily follow from all of that: none of it means you can't, or shouldn't, bargain hard on the actual number.
The model, in outline
Voss lays out a structured approach to counter-offers sometimes called the Ackerman model: set a target price, then make a first offer well below it (specifically calibrated relative to your real target, not just an arbitrary lowball), and move toward your target in a sequence of decreasing increments rather than smooth, even steps — with the final number often including a slightly unusual figure (an odd number rather than a round one) to make it feel like the result of real calculation rather than an arbitrary stopping point.
The mechanics are less important here than the underlying discipline: bargaining hard and staying emotionally warm are not in tension. You can use every technique from the earlier chapters — mirroring, labeling, calibrated questions — throughout a genuinely hard-nosed negotiation on price. Rapport is not the same as being a pushover, and Voss is explicit that the softer techniques exist precisely to make it possible to hold a hard line without the relationship curdling into hostility.
Why decreasing increments matter
A sequence of counter-offers that decreases in size as it approaches your target sends a real signal: the room to move is running out, and it's running out for a genuine reason, not because you're playing a game with round numbers. A round final number ($10,000) feels arbitrary; a specific one ($9,400) feels like it came from an actual calculation, which makes the "this is genuinely as far as I can go" signal more credible.
How this plays out honestly
- Know your real target before you start, and let the whole structure serve that number honestly — this isn't a script for extracting more than something is worth, it's a structure for arriving credibly at what it's actually worth.
- Combine the hard number with the soft technique. A firm counter-offer, delivered with a label acknowledging how it probably lands ("I know this number might feel like a big move from where we started") does more work than the same number delivered coldly.
- Let the increments actually shrink for a real reason — because you're actually running out of room — not as a manufactured performance of scarcity. This is the same honesty test as the take-away close (Sales Psychology Files #02): can you defend the pattern of your offers as accurate, or is it just theater built to look like accuracy?
Where this connects to the rest of the site
This chapter is the answer to a question a reader of the whole content library so far might reasonably be asking: if all these techniques are about warmth, rapport, and reading the room, does that mean giving things away? No — it means bargaining hard from a position where the other side still trusts you, which tends to produce a better final number than either pure aggression (which trades the relationship for the number) or pure accommodation (which trades the number for the relationship).
The honest caveat
A structured bargaining sequence used on someone who's already told you plainly what they can and can't do — ignoring real information in favor of running the model anyway — crosses from hard bargaining into simply not listening. The model is a tool for finding your real number credibly, not a script to run regardless of what the other side has actually told you.
Previously: the handshake isn't the deal. Next: the Black Swan.