But whether you're starting out in your first ever job or you're already chairwoman of the board, making those sartorial choices each day an seem like a bit of an effort.
That's why we love it when a high street brand nails a capsule workwear collection, and H&M's new autumn/winter 15 range is right up our (stylish, office-filled) street.
As always, H&M's dresses take their cues from the catwalk, but combine their high fashion ethos with a sensible comfort that's sure to survive eight-hours in an office chair - plus, one of them is a dead ringer for a Victoria Beckham style.
There's also cosy, yet lightweight jumpers, to throw on when the air con's on full blast, a leopard print skirt to rival M&S's autumn offering, and the spot-on suede accessories to update last year's wardrobe.
If your work dress code is on the smart side, nail the art of power dressing (which is officially back, FYI) with a sharp blazer, or slip into the 70s and keep it casual in an embroidered peasant blouse.
Here's our pick of the 17 best H&M pieces to wear to the office this autumn: