Most people leave money on the table in salary negotiations because they haven't done the maths first. Here's how to calculate your market rate, frame your number, and handle counteroffers.
Salary negotiation is one of the highest-leverage financial activities most people never do. A single successful negotiation can be worth tens of thousands of pounds over a career — yet most people accept the first offer without discussion.
Walking into a negotiation without market data puts you at an immediate disadvantage. Gather salary data from at least three sources:
Before negotiating, calculate your full current package — not just salary. Underselling what you currently earn weakens your position.
Anchor high: The first number stated in a negotiation anchors the entire discussion. If asked for your expectations, name a number at or above your 75th percentile target. People adjust from anchors; they don't reset from them.
Give a range, not a point: "I'm looking for £50,000–£55,000 based on my research" is better than "I want £52,000." The range feels collaborative; the bottom of your range should be your actual target.
Never be the first to reject your own number: After naming your number, be quiet. Let them respond. The discomfort of silence causes people to negotiate against themselves.
If an employer genuinely cannot move on base salary (common in structured pay bands), negotiate other elements:
A signing bonus of £3,000 + one extra week's holiday can be worth more in year one than a £1,500 base salary increase, depending on your marginal tax rate.
Before any negotiation, calculate your walkaway number — the minimum you'll accept — and commit to it privately before the conversation starts. Decisions made under social pressure in the moment are systematically worse than decisions made in advance. If an offer is below your walkaway number, declining is a financial decision, not an emotional one.