Organization Design

Relational Contracts and the Promise a Manager Cannot Enforce

Get the arithmetic behind every informal promise a manager makes — the exact condition under which an unenforceable commitment is believed — and see why cutting expected tenure from five years to two can shrink what you are able to promise by a factor of three.

  • Expert
  • 14 min total
  • 14 chapters

What decision this helps you make: Which promises you can credibly make to your team, how large a commitment your relationship can actually carry, and what to do after one has been broken — including the uncomfortable answer that you frequently cannot simply start again.

What this topic is

A relational contract is an agreement that no court will enforce, sustained instead by the value both sides place on the relationship continuing. "Take the difficult account this year and I will look after you at promotion time." "Tell me the bad news early and it will not be held against you." "Do this properly rather than quickly and I will defend the timeline." None of those is written down, none is justiciable, and all of them do more work in a functioning organisation than anything in the employment contract. They hold when breaking the promise costs more, in destroyed future value, than keeping it saves today. That inequality is the whole subject.

Why it matters

Everything a manager most needs from people is unverifiable by a third party: honest bad news, effort on things nobody counts, cooperation with a colleague, discretion about a mistake. None of it can be contracted for, so all of it runs on informal promises. The size of the promise you can credibly make is not a matter of sincerity — it is a computable quantity that depends on how long both parties expect the relationship to last and how much surplus it generates. That is why reorganisations, high attrition and short-tenure managers cause damage far beyond their visible cost: they destroy the collateral behind every unwritten commitment in the business.

Who should learn it

Managers who have promised something they cannot put in writing, leaders who have watched a reorganisation destroy something they cannot name, and anyone trying to understand why two companies with identical formal systems and identical people produce persistently different results.

What you will understand

  • The self-enforcement condition, and how to compute the largest promise a relationship can carry
  • Why expected tenure — of both parties — is the dominant input, and what that implies about attrition and reorganisation
  • How formal and relational contracts interact, including where a formal contract destroys an informal one
  • What actually happens after a broken promise, and why restarting is much harder than it looks

Prerequisites

Common misconception

"Trust is culture, and culture is about values." Trust in this sense is not a virtue; it is an equilibrium, and equilibria have conditions. A promise is believed when the promisor's discounted future gain from the relationship exceeds their one-time gain from breaking it — which means the same manager, with the same integrity, can credibly promise far more to a person expecting to stay five years than to one expecting to leave in twelve months. A second misconception is that a broken relational contract can be repaired by acknowledging it and doing better. Sometimes, slowly. But the mechanism that sustained it was the belief that you would not break it, and that belief was evidence-based. Once the evidence exists, the promise is priced lower forever, and the strategies that make these contracts work in theory are famously unforgiving about restarting.