What a settlement agreement actually is
A settlement agreement (previously called a compromise agreement) is a legally binding contract between you and your employer that settles any employment claims you might have. In plain terms: you agree not to take your employer to an employment tribunal or court, and in exchange they agree to pay you an agreed sum and usually provide a reference. Once signed, you give up your right to claim unfair dismissal, discrimination, or any other employment-related claim, permanently.
Why employers use them
Settlement agreements give employers certainty. They know that once you've signed, you can't come back later with a tribunal claim or leak confidential information about the process. For employers, this certainty is worth paying for, often substantially above the statutory minimum. That dynamic is important to understand: if your employer has offered you a settlement agreement, they think there's risk in your situation. That risk is your leverage.
What's usually in one
Most settlement agreements include: the termination date, the settlement payment amount (often split into a notice payment, a redundancy payment, and an 'ex gratia' payment to keep under the £30,000 tax-free threshold), the conditions under which you're leaving, a confidentiality clause preventing you from talking about the agreement, a non-derogatory behaviour clause on both sides, tax indemnities, and a contribution toward your legal fees. Some agreements also include garden leave provisions, post-termination restrictions, and an agreed reference.
You must get independent legal advice
A settlement agreement is only legally valid if you have received independent legal advice from a qualified adviser, usually a solicitor, before signing. Your employer must contribute toward the cost of this advice (typically they'll offer £500–£1,500 plus VAT). This isn't a formality. A good employment solicitor will read the agreement, identify any clauses that are unusually broad or disadvantageous, and advise you on whether the overall package is reasonable given your circumstances. They can also help you negotiate.
What you can negotiate
Almost everything in a settlement agreement is negotiable, and employers expect some pushback. Common areas to negotiate include: the payment amount itself, the tax treatment of different elements, the wording of the confidentiality clause (especially if it's very broad or would restrict your future work), the reference wording (get it agreed in writing and attached to the agreement), garden leave versus working notice, and post-termination restrictions. The starting offer is rarely the best offer, and the worst your employer can say is no.
Red flags to watch for
Broad confidentiality clauses that prevent you from discussing the circumstances of your departure with future employers. Post-termination restrictions that would prevent you from working in your industry for 6–12 months. Clauses that say you warrant no information you've given is false (which could make the agreement void if there's any dispute). A very short deadline to sign, typically you should have at least 10 days to take advice. If any of these appear in your agreement, raise them with your solicitor before signing.