One person in five has not yet written a will and would consider leaving a bequest to charity, new research shows.
The data, which comes from sector consultancy nfpSynergy and is published this week, is based on a survey of more than 1,000 people.
Twenty per cent of those surveyed said they had not yet written wills but would think about including legacies to charities when they did.
Only 7 per cent of those surveyed said they had already written wills but would consider changing them to include charitable donations.
Seven per cent of respondents said they had already made wills that included legacy gifts to charities. Twenty-three per cent said they had made wills and either would not consider leaving legacies or were unsure about whether they would alter their wills to do so.
Forty-three per cent had not made wills and would not consider leaving legacies, or were unsure.
Rebecca Molyneux, a researcher at nfpSynergy, said: "Charities should nurture relationships with younger generations, who are far less likely than older supporters to have made wills but have high consideration rates for giving legacies."