The extra everyday living costs faced by disabled people are £550 per month, compared to average state benefits payments of £360 per month.
The findings by Scope have been announced as the Extra Costs Commission unveils its final recommendations on how disabled people can be ‘bold and loud' and build their power as consumers to reduce costs.
The commission's plans include sharing shopping experiences on online forums and encouraging businesses to recognise the value of the "purple pound".
Robin Hindle, chair of The Extra Cost Commission, said: "It is very clear that life costs more if you are disabled.
"The Extra Costs Commission has focussed on finding market-based initiatives that can alleviate the impact that extra costs have on the lives of disabled people.
"Maintaining the value of benefits is absolutely critical, but the Commission believes better functioning markets and increased competition can also play a part in improving services and driving down costs.
"The Commission has seen positive examples of businesses taking steps to improve their service for disabled people.
"Yet, much more needs to be done - a shocking three quarters of disabled people have left a shop or business because of poor disability awareness.
"The Commission believes that is because businesses still don't recognise the substantial value of the purple pound.
"Disabled people and their families have considerable spending power.
"But in order to capitalise on this, we need to come together as a collective consumer group.
"We want disabled people to be bold and loud - share information about their needs as shoppers, complain and speak up when dissatisfied and demand more as consumers.
"Only then will businesses start to recognise the value of the "purple pound", in the way that they do the "pink" and "grey" consumer markets."