Best endeavours definition

What does Best endeavours mean?

The terms 'best endeavours', 'reasonable endeavours' and the variations 'all reasonable endeavours', 'commercially reasonable endeavours' or 'reasonably commercial endeavours' and 'utmost endeavours' are frequently used in drafting commercial agreements and may be the result of considerable negotiation and often represent a compromise.

These terms represent a range of obligations at different ends of the spectrum. The most onerous obligation which can be imposed is a strict or absolute obligation. Next is the obligation of best endeavours followed by all reasonable endeavours. At the other end of the spectrum is the obligation to use reasonable endeavours. The precise obligations imposed by each of these terms is far from certain and have frequently been the subject of judicial interpretation with varying results.

Discover our 110 Practice Notes on Best endeavours

Dive into our 120 Precedents related to Best endeavours

See the 12 Q&As about Best endeavours

Read the latest 87 News articles on Best endeavours

Speed up all aspects of your legal work with tools that help you to work faster and smarter. Win cases, close deals and grow your business–all whilst saving time and reducing risk.

  Case studies

"What I spend on my yearly subscription, equals to a day's billable hours for me not to mention time efficiency and peace of mind."

Jai Stern

Access all documents on Best endeavours