Yes, there is a time limit for receipt of Illness Benefit when on One-parent Family Payment. Then there are other rules regrsding how long it is paid.
If you have 260 weeks PRSI paid since you first began work, you may be entitled to Illness Benefit for as long as you are unfit for work and you are under 66.
From January 2009, if you have 260 or more PRSI contributions you can get Illness Benefit for a maximum of 2 years. This change will not affect people getting Illness Benefit before this date.
If you have between 104 and 259 weeks PRSI contributions paid, you may be entitled to Illness Benefit for only up to a year. You wopuld need to check this out with the Illness Benefit section to see where you stand.