From 50 to 100 a big jump?

I see so many people go up by increments but here in UK they prescribe 50 and 100 with nothing in between. 50 wasn't too bad to increment to as I could break it in half down the score line thus starting on 25mg. But now I'm wanting to increase I've got 100mg tablets, but I am wary to jump up by 50mg. I have a pill cutter so I could bump to 75mg but that's gonna be annoying to have to do all the time and not necessarily accurate. So wondering if I should just bite the bullet and do the 50 to 100 jump...