Salary Negotiation Outcome Estimator

Salary bargaining is a textbook case of distributive negotiation over a single continuous variable. Each side holds a reservation price: the candidate has a walk-away number, and the employer has an approved budget ceiling, usually the top of a job level's pay band. The overlap between those two numbers is the zone of possible agreement, and any settlement must land inside it. Where inside the zone it lands depends mostly on information and alternatives, which is what a leverage score tries to summarize. This model weights four inputs: the gap between current pay and market rate, years of relevant experience, the number of live competing offers, and whether the ask sits within roughly 15 percent of market, then maps the total onto a settlement factor between 0.50 and 0.85 of the distance from current pay to the ask. Useful reference points: internal merit increases in the United States have run near 3 to 4 percent annually, while changing employers has typically produced 10 to 20 percent jumps, which is why an external offer is the single strongest leverage input. Negotiated gains over a first offer commonly fall in the 5 to 15 percent range for individual contributor roles. The important caveat is that this is a heuristic scoring model, not a regression fitted to observed offer data, so the coefficients are illustrative rather than predictive. It also ignores rigid pay bands, geographic differentials, equity and bonus components, internal equity constraints, and hiring freezes, any of which can cap an outcome regardless of leverage.

The vocabulary used here comes from the Harvard Negotiation Project. Roger Fisher and William Ury introduced BATNA, the best alternative to a negotiated agreement, in Getting to Yes in 1981, arguing that bargaining power derives not from stubbornness but from the quality of the option you can walk away to. The related idea of a zone of possible agreement, bounded by each side's reservation price, was already standard in bargaining theory and was formalized for practitioners by Howard Raiffa in The Art and Science of Negotiation in 1982. The anchoring effect that makes the first number matter so much was documented earlier still by Amos Tversky and Daniel Kahneman in their 1974 Science paper on judgment under uncertainty. Applying these ideas specifically to pay became widespread after Linda Babcock and Sara Laschever published Women Don't Ask in 2003, which showed that far fewer women than men opened a negotiation on a first job offer and estimated that skipping that one conversation could cost hundreds of thousands of dollars in cumulative earnings. Public salary data changed the practice again: sites such as Glassdoor and PayScale gave candidates market benchmarks from the mid-2000s, and legislation then formalized disclosure. Colorado's Equal Pay for Equal Work Act, effective January 2021, first required pay ranges in job postings, followed by New York City in 2022 and California in 2023. With ranges published, the negotiation increasingly begins from a known band rather than from a blind guess.