Some 20 per cent of charities do not accept donations via their own websites, and 38 per cent are not able to receive text donations, according to a report from Barclays.
Of those who do not take donations online, 17 per cent said this was because they were not funded by public donations.
The future of charitable donations, which is published today, warns that charities need to invest in new technologies to attract younger donors.
Barclays surveyed 301 charities across a variety of causes and with a range of annual income.
Cheque donation was the most prevalent method of receiving money, with 95 per cent of charities able to receive cheques. 87 per cent of charities can accept cash, 85 per cent can accept regular direct debits or standing orders and 83 per cent can accept donations via a third party website, such as JustGiving.
David McHattie, head of charities at Barclays said: “Over the past few years, online charitable campaigns like the ‘ice bucket challenge’ for ALS, or the no make-up selfie in aid of Cancer Research have seen resounding benefits from online engagement. So it’s surprising to still see that a fifth of UK charities appear resistant.”
“Those charities without the ability to process donations via text or online state it is because not everyone uses the internet or has access to a computer. While this may be the case for some now, more and more people are growing accustomed to online and this will only increase,” he added.
Of the charities without an online donation facility, almost one-quarter were in the process of introducing online giving.
Some 18 per cent said that it was simpler to use third party sites, 17 per cent said that they were not funded by public donations.
One quarter of those without a text donation facility said that it was not relevant to their charity, while 11 per cent were in the process of introducing it. Some of the other reasons given for not adopting text donation was that it had not been successful in the past and there are too few potential donors.