Rankin has always dedicated time to charity projects, working with the Peta, Macmillan Cancer Support, World Cancer Research Fund, Women's Aid, End of the Line and Life Ball, and many more. He also has a long-standing affiliation with Oxfam. In 2011, Rankin was given the opportunity to visit an arid area of Kenya to shoot the campaign and see the extent of the drought for himself. He also hosted an exhibition for Oxglam, which featured work from some of the world’s best photographers. In 2017, he completed a project with Macmillan called Brave the Shave, where loved ones of cancer sufferers shaved their heads in acts of solidarity. And in 2018, he teamed up with the Peta team to stand against fur, warned the world against dangerous foods with WCRF, and encouraged people to get tested with Life Ball... to name only a few.