Most sibling arrangements start with a phrase like I can help when I can. That phrase guarantees the heaviest load lands on whoever answers the phone first. Replace it with a map.

Local option: New Plan Care gives families in the St. Louis area in-home help so a parent can stay home: companionship, help with bathing and dressing, meals, and overnight care. Call (314) 405-0887.

List the tasks, not the hours

Write every recurring task on one sheet. Include the ones nobody thinks of as work: booking and confirming appointments, driving, the grocery list, checking the thermostat and the stove, paying bills, calling the agency, keeping the shared calendar, sitting overnight, and showing up for the Tuesday visit. Mark which tasks need a person in the room and which can be done from a distance.

Map each sibling against the list

For each person, write three things: how far they live from your parent in drive time on a bad day, which hours they can actually hold each week, and which tasks they already do well. Ask each sibling to fill in their own line. A sibling who lives two hours away may still own the billing, the calendar, and the calls with the agency, while the sibling across town takes the Tuesday and Thursday driving.

Assign one owner per task

Each task gets one name. Shared ownership is the same as no owner. If two people must both be involved in a task, name one as the owner and the other as the backup, and write down when the backup is expected to take over. Put the sheet where all of you can see it, and change it when someone's situation changes.

Test the split on a bad week

Pick a week and make something go wrong on purpose. One person is out sick, the car is in the shop, a visit is cancelled. Walk through each task and check whether the named owner or the backup can cover it without calling you. Any task that reaches your phone is a gap. Fix it by moving the task or naming a new backup, not by quietly adding it to your own list.

Decide who pays for what

Money is often the second place this breaks. Decide in advance, and in writing, whether siblings split costs evenly, by income, or by who uses each service. Keep receipts in one shared folder. Make sure no sibling's contribution comes as a surprise at the end of the month.

If the family needs help starting the conversation, the Start Here page explains how this desk approaches the first steps.