What's fair is fair. Post a Daily Chore List. This is for couples want to:
a) Avoid confrontation;
b) Support the other;
c) Promote peaceful cohabitation.
Both people scratch off items when finished. Nobody needs to sulk, nag, or get upset. And everyone wins!
First, it's never a good practice to make a mountain out of a mole hill. Well, I gotta ask, do you have a written or verbal agreement for dividing up house chores? If not, make one.
Secondly, this is an easy fix for most couples. Don't beat the issue to death. Nobody likes to owe their partner favors all the time. It puts them in a one-down position. Write out a few ideas and discuss how the list changes with the seasons. Who shovels the snow? Who dusts? Does one cook and the other clean up? How about laundry?
Lastly, try the Extra Chore List method that my parents used. My mother would write down a 2-3 item list for my dad and then post it on the fridge. As a stay-at-home mother of five, she did nearly all of the household duties. My dad respected the fact she couldn't do everything; he simply crossed them out one at a time. If it was urgent, she'd put a star by it.
With both parties working, either person can add a specific chore with a target date.Who is better equipped to handle it. If neither has the muscle or expertise to do it, call an expert.