Open-ended, or permanent, employment contracts are the most common type of contract in the UK. They offer ongoing employment with no fixed end date. They have more flexibility for termination but they are more difficult and costly than expiration of fixed-term. Fixed-term contracts, on the other hand, are typically used for specific roles or projects that have a defined start and end date. Dismissal is possible but this must be stated in the contract. deciding not to renew a fixed-term contract can result in the risk of an unfair dismissal claim and a potential compensation payment. Zero hours contracts are a more flexible type of employment contract that does not guarantee a set number of hours each week. Instead, employees are only required to work when needed.