The moment I learned to leave Three years ago, I sat in a meeting room in Canary Wharf negotiating a partnership that would have doubled our client base. On paper, everything made sense. The numbers worked. The strategic fit was obvious. But the other side kept moving the goalposts. First it was payment terms. Then exclusivity clauses. Then a request to renegotiate the revenue split we had already agreed twice. I stayed in that room for four hours longer than I should have. When I finally walked out, I felt like I had lost. Within six months, I realised it was the best decision I made that year. Why people stay too long Sunk cost. That is the textbook answer, and it is true. You have invested time, energy, sometimes money. Walking away feels like admitting that investment was wasted. But there is something else. People running their own thing often believe that persistence is the whole game. You pushed through when others quit. You made calls nobody answered. You built something from nothing by refusing to stop. That mindset serves you brilliantly in some contexts. In negotiation, it can destroy you. I have seen someone spend eight weeks negotiating a supplier contract worth £12,000. Eight weeks. The mental cost alone exceeded the value of the deal. They got a 4% discount in the end. Roughly £480. For eight weeks of back and forth. They celebrated. I thought they had lost badly. The three signals that mean stop I look for three things now. When any of them appear, I start preparing to leave. The terms keep changing after agreement. Once you have shaken hands, metaphorically or otherwise, the deal should be stable. Minor clarifications are normal. Fundamental shifts are not. If someone reopens what you have already closed, they are either testing your boundaries or they never intended to honour the original terms. Neither is a good sign. The timeline stretches without explanation. Delays happen. But when every deadline gets pushed and no one can tell you why, something else is going on. Either they are negotiating with someone else, or they are hoping you will get desperate enough to accept worse terms. Both scenarios mean you should recalibrate. Your gut says no but your spreadsheet says yes. I know this sounds soft. It is not. Your intuition is pattern recognition running in the background. If something feels wrong and you cannot articulate why, pay attention. The spreadsheet only captures what you can measure. It misses the quality of communication, the consistency of behaviour, the small signals that predict how this relationship will actually work. What walking away actually costs Let me be specific. In my experience, walking away from a bad negotiation costs you about two weeks of emotional reset and the need to restart your search. That is real. It is not nothing. But staying in a bad deal costs you months or years. I worked with someone last year who signed a partnership agreement despite clear warning signs. Within four months, they were spending 30% of their working week managing the fallout from that partnership. Disputes over deliverables. Arguments about scope. Passive aggressive emails that took hours to decode and respond to. They eventually exited the deal. It cost them £8,500 in legal fees and a damaged reputation with a client they had introduced to the partner. All because they thought walking away at the negotiation stage would have been giving up. The walk-away number Before any significant negotiation, I write down a number. Not a target. A floor. This is the point below which the deal no longer makes sense for me. It includes financial terms, but also time commitments, exclusivity requirements, and anything else that affects my capacity to operate. Once I have that number, I do not negotiate with myself during the conversation. The other party can try to move me. My own eagerness cannot. This is harder than it sounds. In the moment, you will find reasons why this particular situation is different. Why the relationship value justifies worse terms. Why the exposure or the learning or the strategic positioning makes up for the gap. Sometimes those reasons are real. Most of the time, they are rationalisation dressed up as strategy. The current climate makes this harder With all the uncertainty around tariffs and trade policy, with budget pressures building and markets getting jittery, the temptation to accept any deal that looks stable is enormous. I get it. Watching the news about escalating trade tensions and potential tax rises makes everyone want to lock things down. But bad deals do not become good deals because the environment is uncertain. They become worse. The partner who is difficult now will be impossible when things get tight. The contract that barely works in good conditions will fail completely under pressure. Uncertainty is a reason to be more selective, not less. The conversation I have with myself When I am deep in a negotiation and unsure whether to continue, I ask myself one question: if this deal came to me fresh tomorrow, with no history and no sunk cost, would I take it on these terms? If the answer is no, I walk. At alira.london, I have a Decision Matrix tool that helps people work through exactly this kind of choice. It forces you to weight the factors that actually matter and see whether the deal you are considering passes your own criteria. I have used it myself more than once. But the tool is secondary. The discipline is primary. You need to be willing to leave before you can negotiate well. What to do this week Write down your floor before your next negotiation. Not during. Before. Include the non-financial terms that matter. Put it somewhere you will see it during the conversation. Review one deal you are currently in. Ask the fresh-tomorrow question. If you would not take it today, start thinking about your exit options. Set a time limit for any negotiation that has been dragging. Pick a date. If you do not have agreed terms by then, walk. Tell the other party the deadline exists. Watch how they respond.