Advances in imaging and radiotherapy planning have allowed the improvement in radiation therapy dose conformation around tumours and significantly improved accuracy of radiotherapy delivery. Although the liver is a radiosensitive organ, smaller volumes of liver can be treated to ablative doses of radiotherapy to cure cancers within the liver. An increase in understanding of the tolerance of the liver to radiation therapy has allowed larger volumes of liver to be treated with higher doses potentially improving the palliative benefit of radiotherapy and roles of radiotherapy for treatment of hepatocellular carcinoma and liver metastases. The new indications of radiotherapy for liver cancer will be discussed.