ObjectiveTo extend previous work and estimate health and social care costs, litigation costs, funeral‐related costs, and productivity losses associated with stillbirth in the UK.DesignA population‐based cost‐of‐illness study using a synthesis of secondary data.SettingThe National Health Service (NHS) and wider society in the UK.PopulationStillbirths occurring within a 12‐month period and subsequent events occurring over the following 2 years.MethodsCosts were estimated using published data on events, resource use, and unit costs.Main outcome measuresMean health and social care costs, litigation costs, funeral‐related costs, and productivity costs for 2 years, reported for a single stillbirth and at a national level.ResultsMean health and social care costs per stillbirth were £4191. Additionally, funeral‐related costs were £559, and workplace absence (parents and healthcare professionals) was estimated to cost £3829 per stillbirth. For the UK, the annual health and social care costs were estimated at £13.6 million, and total productivity losses amounted to £706.1 million (98% of this cost was attributable to the loss of the life of the baby). The figures for total productivity losses were sensitive to the perspective adopted about the loss of life of the baby.ConclusionThis work expands the current intelligence on the costs of stillbirth beyond the health service to costs for parents and society, and yet these additional findings must still be regarded as conservative estimates of the true economic costs.Tweetable abstractThe costs of stillbirth are significant, affecting the health service, parents, professionals, and society.Plain Language SummaryWhy and how was the study carried out?The personal, social, and emotional consequences of stillbirth are profound. Placing a monetary value on such consequences is emotive, yet necessary, when deciding how best to invest limited healthcare resources. We estimated the average costs associated with a single stillbirth and the costs for all stillbirths occurring in the UK over a 1‐year period.What were the main findings?The average cost to the National Health Service (NHS) of care related to the stillbirth and a first subsequent pregnancy was £4191 for each stillbirth. For the UK, this cost was £13.6 million annually. Clinical negligence payments to bereaved parents were estimated at £2.5 million per year. Parents were estimated to spend £1.8 million per year on funerals. The cost of workplace absence as parents cope with the effects of grief was estimated at £2476 per stillbirth. For the UK, this cost was £8.1 million annually. The loss of a baby is also the loss of an individual with the potential to become a valued and productive member of society. The expected value of an adult's lifetime working hours was taken as an estimate of this productivity loss, and was £213,304 for each stillbirth. The annual cost for all stillbirths was £694 million. We know from parents that the birth of a subsequent child in no way replaces a stillborn baby. We found that 52% of women fall ...