Use precise, not round, numbers

A specific figure (e.g. 9,850) anchors more credibly than a round one (10,000).

Why it works

Precise numbers signal that real analysis went into them, so the other side infers you’re informed and adjusts in smaller increments — keeping the final figure closer to your anchor. Round numbers read as approximations and invite large, round counter-moves.

How to do it

1. Open with a specific, non-round figure backed by your calculation.
2. Avoid suspiciously precise but baseless numbers — the rationale still has to exist.
3. Hold the precision through your concessions rather than collapsing to round numbers.

Evidence

Studies on precise versus round anchors find precise first offers can lead to smaller counter-adjustments and outcomes nearer the anchor. (observational)

The effect is modest and context-dependent; precision helps only when the number remains plausible.

Common mistake

Rounding for "cleanliness," which signals approximation and invites the other side to round aggressively against you.