The licence for a wheelchair-accessible taxi now costs £15,000, compared with £100 in 1992.
The taxi-licence renewal fee has gone up from £7 to £450 over the same period.
The fare rate has risen only 5p a mile since 1985, to the present 80p level.
The Dublin taxi-meter area has been rearranged without consultation with drivers.
Devolution of responsibility for the taxi service from the Department of the Environment to the four Dublin local authorities is proving "unworkable", say drivers.
