What is Chain clause?

A chain clause works like a relay baton: each subsequent owner or contracting party must take on the obligation and pass it forward. The clause itself is an obligation between two parties, but through the pass-on requirement and accompanying penalty clause, a long-running chain of obligations effectively emerges.

The classic example comes from property law. A seller sells a building with the condition that the buyer may not use it as a hospitality venue. The buyer must include this clause in any subsequent sale contract. Failure to do so triggers the contractual penalty.

In business practice, chain clauses also appear outside real estate. In a business acquisition, contracts with suppliers or clients may contain chain clauses that oblige the buyer to respect existing contractual terms. In the construction sector, chain clauses are used to pass safety obligations or environmental standards down to subcontractors and their successors.

The legal strength of a chain clause depends on its drafting. A poorly drafted clause without a penalty provision or without a clear pass-on obligation quickly loses its effect. The penalty must be high enough to enforce the pass-on duty but not so high that a court reduces it.

Chain clauses are a risk that many SME owners overlook when acquiring a business, purchasing property or entering a long-term contract. You are not only taking over the contract itself but also obligations that may be decades old.

Research by Loio (2026) shows that 71 per cent of all contracts are never monitored for compliance. This means chain clauses in existing contracts are often unknown to the current contract holder. Without a structured contract register in which such special clauses are tagged, you risk penalties or legal proceedings you did not know existed.