Will your final salary be based of current salary (index linked) or salary at retirement. What happens if you are promoted?
Make sure that the calc is salary * no of years worked/60 less pension * no of years worked/40.
Example
Start work at 22
Current Age 45
No of years worked 23
Current salary 60,000
State Pension 10,000
60K * 23/60 less 10K * 23/40
23K less 5.75
17.25K
Also ask for projections if you contribute X amount. It will give you some idea of how much you have to contribute to make up this shortfall.
Just remember that the max pension is 40/60 or 2/3 of final salary (without deduction of state pension) per P60 and you can get tax relief on any contributions you make. You could ask for an increase in salary as the company will also make a saving (does not have to pay employers 10.75% PRSI)