The quick answer is that it will delay your upgrade by a few years and then delay building PIC time by another few years.

OPS SPECS (FAA Regs) at your company will outline required flight time breakdowns required for Capt. upgrade. I believe at some regional carriers it was 3500 hours TT to upgrade. After upgrade, you'll start building PIC time which will take more time to get to whatever the magic number is to move on.