On top of all that
On top of that

What‘s the difference?

Question

On top of all that
On top of that

￼￼What‘s the difference?

Answer

I assume you mean ‘as well as’ rather than something being physically on top of something else.

Not much difference, adding ‘all’ suggests there is more that you are adding to.

I crashed my car, I lost my job, my wife left me and on top of all that my dog died.

Answer

The meaning is essentially the same = in addition to that.  The second sentence could refer to one or more events preceding it.  Adding 'all' emphasizes the fact that several things occurred first.