First you say 20 months only and then say fixed terms for 1 or 2 years. Which is it, 20 months or 2 years? If it is 2 years then Anglo Irish Bank allows you to save any amount up to €1,000 per month (currently @ 7%) but it must be for 2 years and you cannot withdraw over that period. You can save up to €750 per month (currently @ 7%) with Halifax but they will only commit that amount for 12 months. If for 20 months you can save only up to €300 per month (currently @ 7.10%)with AIB who do not tie you in for 2 years. If you have a spouse or partner then you could open two accounts with AIB and save €600 per month. I think these are your best options.