Personal allowance tapers after 100k, making the effective marginal rate 60% between 100-125k. If you include student loan payments too, it's actually more like 69%!
There are other even more extreme marginal rates hidden in the tax system if you have children, I believe there are even some circumstances of >100%
There are other even more extreme marginal rates hidden in the tax system if you have children, I believe there are even some circumstances of >100%