Child workers are commonplace in historical sources but rarely feature in the grand narratives of economic history. Recently, however, new theories have identified changes in children’s economic value as key to economic and demographic trends in Britain but there has been little data with which to examine these putative effects. Prompted by these ideas, we present data on payments, both in cash and in kind, made to 3873 children from 1280 to 1860. Children’s wages show some similarities in their trajectories to those found for adults. Real wages increased after the Black Death and stayed at a high level through the C16th; but they then suffered a decline which was only checked in the mid-C18th and not reversed even when industrialisation was underway. Indeed, remuneration for child workers progressively fell away from that of unskilled adult males from the C16th. Until the late C17th, children working on annual contracts suffered the same disadvantage compared with day labourers as found for adults. Regression analysis controls for variation in our sample over time and reveals predictable relationships with key variables such as age, industry, sector and region. Children were an integral part of historic labour markets and their wages reflected economic factors. Knowledge of children’s work and wages helps illuminate aspects of recent theories on Britain’s historical growth.