Yeah we are pretty even here.
Dentist we all go together and book the next appointment after we finish that check up - no mental load at all!
Doctors - I do mine, he does his and child
Pets - food and litter is set up on monthly delivery, no mental load (he cleans litter)
Finance - I do the mortgage and notify about any new deals on interest rates for savings. No real mental load as it happens once every 5yrs! Again utilities are once a year or every 18m so no real mental load there.
Holidays - we plan together
Nursery - we both receive notifications, husband packs a bag for the whole week, I drop off, he picks up
Clothes - we do our own, tend to do an online shop for child in bulk
Christmas/birthdays - I do my family, he does his, both do child (we buy a stash of cards so the only mental load for birthdays is a calendar reminder and whoever is walking by the post box)
Food/household - online shop, household goods on repeat order. I cook, he washes up
We have a cleaner once a week so neither of us clean. Both do laundry, probably him more than me (even though I mostly wfh!).
I don’t really feel like we have a lot of ‘mental load’ things. Most things we set a reminder, or it’s on repeat order, or it’s something that comes around once a year.