Family Carers Ireland say a shortage of vital services is undermining progress that has been made in helping carers.
Launching its annual scorecard, it points to respite, suitable housing and transport as the areas that need urgent attention.
The Government did allocate extra funding for respite care this year, but the organisation says that did not meet the increased demand.
It said it only achieved a slowdown in the decline in the levels of respite available to carers and the people they care for.
It says access to respite and to home care packages remains very much a postcode lottery, decided by where people live rather than by their needs.
On housing, it says there are an increasing number of carers and people with disabilities on the social housing waiting list and at risk of homelessness.
It says the Government needs to provide resources for suitable accommodation as housing that is not appropriate cannot be safe for either carers or those for which they care.
On transport, it points to the failure to replace the Mobility Allowance and the Motorised Transport Grant withdrawn in 2013 with a long awaited 'Transport Support Scheme'.
Family Carers Ireland said there was some progress in 2017, including the allocation of €500,000 Dormant Accounts funding for information and training supports, an additional €10m in funding towards respite supports for people with disabilities and the announcement that carers in receipt of Carer's Allowance and Carer's Benefit will receive a GP Visit Card.
The scorecard found that in 2017 good progress was made 21 issues, initial progress on eight, but no progress on nine, while there was regression or disimprovement on three issues.
This is a more positive report than for previous years.
In 2016, good progress was made on 17, some progress on 11, no progress on eight and there was regression on five.
