How to handle disagreements with adult siblings over parents, money or care

The situation

Caring for an aging parent, splitting costs, selling the family home, planning the holidays. One sibling does most of the work, another has strong opinions and no time, and old roles take over fast.

What's really going on

Sibling disputes are rarely only about the task in front of you. They carry decades of history: who was the favorite, who always helped, who never did. You won't settle the history in a text thread. You can make the current decision concrete: who does what, by when, and who pays.

Example replies

They write: "You always make these decisions without me and then expect me to pay."

• Peacekeeper: "You're right that I should have brought you in sooner. Can we set up a call this week to agree on Mom's care plan and how we split the cost?"
• Barrister (record-ready): "Mom's care costs [amount] a month. I'm proposing we split it [equally / by income], starting [date]. Please reply by [date] with any changes."
• Grey rock: "The care home invoice is [amount] a month. Can you confirm your share by Friday?"
• Assertive: "I've covered these costs on my own for [six months], and I won't keep doing that. Please confirm by [date] whether you'll pay your share."

Mistakes to avoid

• Bringing up old grievances in the middle of a practical decision.
• Making big decisions alone and announcing them afterward.
• Leaving money vague. Write down amounts and dates.
• Using a parent as the go-between.

When to escalate

If you can't agree, a family mediator or an elder mediation service can help, especially with care and property decisions. When wills, inheritance or property are involved, each sibling may need their own legal advice.

Get help with your exact message

Resolve the Disputes reads your sibling's message, explains what's really driving it, and gives you four replies to choose from.