3 October 2014 Last updated at 01:33
Citizens Advice Scotland said people are waiting an average of six months between claiming the new Personal Independence Payment (PIP) and receiving the payment.
This can have a knock-on effect on other benefit claims, it said.
PIP has been introduced in Scotland over the past year.
It is part of wider welfare reforms by the UK government, and has replaced the Disabled Living Allowance (DLA) as the main benefit that helps disabled people meet the costs of their basic daily living.
6th August 2014
by DR JOYCE CAVAYE
Carers: is there life after care-giving? Have you or anyone you know, ever been an unpaid carer? Three in every five people will be carers at some point in their lives so it is likely that you will know someone who is or has been a carer.
The number of carers in the UK is estimated to be around 6.5 million.
In Scotland, there are about 650,000 unpaid carers providing care and support to family members, partners, friends and neighbours who are affected by ill health, frailty or disability. These numbers are projected to rise over the next 20 years, in response to an aging population and fewer social services.
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