I'm not a financial adviser and professional advice would be sensible!
Tracker is fixed to BOE base rate (I assume).
Discounted is AFAIK linked to the banks own Standard Variable Rate (SVR).
Whilst usually SVR follows BOE base it may not. ING will be free to change that as they see fit, whenever they wish.
Base rate is going to go up at somepoint. The SVR will probably follow it. But if Base comes back down for any reason, I've noticed banks are usually a lot slower to put their SVR down!
I've not surveyed the market recently but are there any sensible capped/fixed rates available? Whilst it seems unlikely that we will see a huge jump in rates in the next couple of years (it seemed equally as unlikely that we would be this low four years ago!) - they can only go in one direction. It is a question of when not if rates go up. It is then a question of how much the increase is.
The two questions I would be asking are:
- what do I think interest rates might be in 3 years time? (I'd stab a guess at BOE base being 2.5% - but also budget on 3.5%)
- if base is at that level what mortgage options might be available then (and it the trend is up, capped/fixed deals will be even less appealing).
Paying slightly more for a long term (say 10 yr) fixed rate might actually work out cheaper than changing every 2-3 years with a £1000 fee each time... ...of course you need to keep your eyes open for redemption clauses if your circumstances change.