Estate planning is often pitched to parents and the wealthy. In reality, single adults are among the most exposed — because the law’s default plan rarely resembles their actual lives.
The scenario. Marcus, 41, single and never married, built a comfortable life: a condo, a 401(k), a brokerage account, and about $600,000 in total assets. He had a close partner he never married, two devoted nieces, and a brother he hadn’t spoken to in fifteen years. He never made a will. When Marcus died suddenly, Massachusetts intestacy law took over. His estranged brother — his closest legal heir — inherited everything. The long-term partner Marcus loved received nothing. His nieces, whom he had informally promised to help through college, got nothing either.
The problems.
- Intestacy distributes assets by statutory formula, ignoring actual relationships.
- An estranged relative inherited the entire estate.
- A devoted partner and nieces received nothing, with no legal standing.
The planning solution.
When you die without a will, intestacy statutes decide who inherits — and they follow a rigid hierarchy of legal relatives: spouse, then children, then parents, then siblings, and outward. The system has no category for an unmarried partner, a close friend, a niece you informally support, or a favorite charity. If your real intentions differ from that formula — and for single adults they almost always do — only your own documents can override it.
The foundation is a will, which lets you direct exactly who receives your property and, crucially, makes legally invisible relationships (a partner, a niece, a friend) into named beneficiaries. For unmarried partners especially, this is essential: the law extends no automatic inheritance rights to a partner, no matter how long the relationship.
Layer in beneficiary and transfer-on-death (TOD/POD) designations on the 401(k), brokerage account, and even the condo (via a beneficiary deed where available). These pass specific assets directly to chosen people, outside probate, and they override the intestacy default entirely.
For privacy, structure, and incapacity protection, a revocable living trust lets Marcus provide for his partner and nieces on his terms, with a successor trustee ready to manage assets if he became incapacitated. And because single people have no spouse to default to, the incapacity documents matter doubly: a durable power of attorney and a health care proxy naming a trusted person ensure someone you choose — not a court-appointed stranger — manages your finances and medical decisions.
The throughline: intestacy is a one-size-fits-all default written for a hypothetical “average” family. If you’re single, your plan has to be intentional, because the default is especially unlikely to match your wishes.
Key takeaways.
- Intestacy ignores partners, friends, and informal commitments — only documents override it.
- A will plus TOD/POD designations directs assets to the people you actually choose.
- Single adults especially need a durable POA and health care proxy.
If you’re single, don’t assume “it’ll work out.” A will, coordinated beneficiary designations, and incapacity documents put you — not the state — in control.