Thanks for all the replies, I'll add a little more info to clarify:
I'm actually looking 6 years into the future here and considering early "retirement", which in reality means leaving my current job and doing something different. Hopefully this will bring in some income but I've no idea how that will work out so I'm basing my rough calculations on known income streams. Time slips by quickly so 6 years is not that far away. My €3000 per month figure is based on current expenses (ex mortgage and savings), with 2 secondary school children and 1 primary, who will then be 2 college and 1 secondary (non fee paying). The monthly figure is averaged over the year and includes annual costs such as car/house insurance, modest holiday etc.
I have the option to leave my current employment and take a pension payment then or defer it for a number of years. My preferred option is to defer pension payments so that whatever income I might earn from my new career is not all taxed at the higher rate. At any stage I can opt to start taking pension payments in case new career income is insufficient. If I don't earn anything after retirement and defer pension payments our monthly income would be €2250. Pension payments would be €2275 if taken immediately but increasing the longer I defer. I'd also forgotten about an investment plan due to mature in 6 years with a guestimate of €25k.
So, some revised figures:
2 adults age 55 and 50
Living in Dublin
No mortgage
Savings of €125k
3 children (2 in 3rd level, 1 in 2nd level)
Monthly income €4500 (me (€2275, wife €825, other €1400, plan to save €1500 per month) hence €3000.
Savings after another 5 years €215k total.
We'll then be 60 and 55, and 1 specific income stream will stop, reducing monthly income to €3100, hence the plan to allow for this by saving €1500 per month all along. So, in 10 years time we will need to live on the original €3000 per month without any option to significantly increase savings, but should already have €215k. I'm not entitled to the State pension at 65, but my wife will be, but that will just replace her current salary. So, we'll be a little old couple with an income of €3000 per month, savings of €215k, and 3 adult children (1 still in college). I don't to ever be dependant on my children
Or that's the plan!