This Practice Note explores contract breach claims and provides practical guidance and tips to consider when bringing a claim for breach of contract before the Irish courts. It addresses initial considerations such as identifying the breach, the loss suffered and the remedies to be sought. It also covers matters relevant to contractual claims such as causation, the duty to mitigate and quantifying the claim. It considers practical issues such as applicable limitation periods, issuing and pleading the claim, evidential issues including discovery and the use of expert witnesses, as well as pre-action obligations and alternative dispute resolution. Scope of this Practice Note Contractual breach claims can be used as an umbrella term for a wide range of disputes which at their core involve contractual relationships. Although many contractual relationships involve written agreements, others may be concluded orally or by conduct. The disputes which may arise may relate to whether: • the relevant obligation, whether it be the provision of goods or services, has been performed in accordance with the contractual