Bondfield was born in Chard, Somerset, in 1873. The tenth of eleven children, she grew up in a working-class family and left home at the age of 14 to take up an apprenticeship with a draper in Hove, Sussex. She subsequently joined her brother Frank in London and continued to work as a shop assistant.
The poor pay, long working hours, and ‘living-in’ requirement of shop work influenced Bondfield’s decision to join the National Amalgamated Union of Shop Assistants, Warehousemen, and Clerks (NUSAWC), becoming a union official and later assistant secretary. In 1908, she retired from her NUSAWC post after ten years of service.
At the same time, Bondfield wrote about her experiences of shop work under the pseudonym ‘Grace Dare’, in an effort to shed light on the poor conditions suffered by shopworkers. She was also an executive member of the Women’s Trade Union League (WTUL), helped to establish the National Federation of Women Workers (NGWW) and was chief women's officer for the National Union of General and Municipal Workers (NUGMW).