When both parents die close together, you almost always have two separate estates to settle, not one. Each parent's assets pass under their own will or their own state's intestacy rules, on their own court calendar, with their own inventory and final accounting. The one thing that changes everything is the order of death and the gap between the two, because a survival period written into state law or into the will decides whether the first parent's property ever reached the second parent at all.

That single question, who survived whom and by how long, determines whether you file one probate or two on the same house, the same bank account, and the same brokerage balance.

Why there are two estates and not one

People expect that losing both parents in the same month means one big estate. Courts do not see it that way. A person's estate is created by their death, and it only holds what they owned at that moment. Your mother's estate holds her property. Your father's estate holds his. Even if you are the executor of both, even if they lived in the same house and shared every account, the two files stay separate from the first petition to the final distribution.

What that means in practice:

• Two petitions, two case numbers, often two sets of Letters
• Two inventories, two creditor notice periods, two accountings
• Two estate bank accounts, and money must never cross between them
• Two tax ID numbers and, if income is involved, two fiduciary income tax returns

If the parents lived in different states, or one owned property in a second state, you may also be looking at ancillary probate on top of that. The work is not more complicated than settling one estate. It is just doubled, run in parallel, and it has to stay unmixed.

The 120-hour rule: what "close together" means legally

Most states have adopted some version of the Uniform Simultaneous Death Act. The modern version, followed in the large majority of states, says a person must survive the other by at least 120 hours, five full days, to be treated as having survived them at all.

If your father died on Monday and your mother died on Thursday, she did not survive him by 120 hours. For inheritance purposes, the law treats each of them as having died first with respect to the other. His property passes as if she predeceased him, and hers passes as if he predeceased her. It skips straight past the surviving spouse and down to the next takers, usually the children.

The rule exists to stop the same assets from bouncing through two estates over a matter of days. Three things to know about how it applies:

1. The will can override it. Many wills contain a survivorship clause requiring the spouse to survive by 30, 60, or 90 days. If the will says 60 days and your mother survived by 45, the will controls and she is treated as predeceasing.
2. It reaches beyond wills. The survival requirement generally applies to joint tenancy with right of survivorship, payable on death and transfer on death designations, and life insurance beneficiaries, not just to probate assets.
3. There is an escheat exception. If applying the rule would leave nobody to inherit and send the property to the state, courts do not apply it.

Beyond that window, the ordinary sequence takes over. If your mother survived your father by three weeks, she inherited from him, and everything she inherited is now part of her estate.

Double probate: the same asset filed twice

This is the expensive scenario, and it is common when the deaths are weeks or months apart instead of days.

Say your father dies in March holding a brokerage account in his sole name. His will leaves everything to your mother. She dies in June. That account has to be probated in his estate to get it into her name, and then probated again in her estate to get it to you. Same money, two courts, two sets of fees, two waits.

Some of it can be avoided or shortened, depending on the state:

• Small estate procedures. If the first parent's probate assets fall under the state threshold, an affidavit may move them without a full probate.
• Spousal transfer petitions. Several states offer a simplified petition to confirm property passing to a spouse, faster than full administration.
• Assets that never entered probate. Anything held jointly with survivorship, or with a valid beneficiary named who is still living, bypasses the first estate. If your father named you as contingent beneficiary and your mother had already died, it goes straight to you.

The step families skip most often is checking whether the first parent's assets even need to move through the first estate. Sometimes a contingent beneficiary designation or a properly titled joint account routes the money past both probates. That is worth confirming before you file anything.

What happens to each type of asset

Asset	If the second parent survived past the window	If not
House owned jointly	Passes to the surviving parent, then into their estate	Treated as if each owned half, both halves probated
Sole-name bank or brokerage account	First estate, then second estate	First parent's estate directly to the children
Life insurance naming the spouse	Paid to the surviving spouse, then part of their estate	Goes to the contingent beneficiary, or the estate if none
IRA or 401(k) naming the spouse	Spousal rollover available, then a non-spouse inheritance at the second death	Straight to the contingent beneficiary
Personal property and vehicles	First estate, then second estate	Split between the two estates

The retirement account line matters more than it looks. A surviving spouse can roll an inherited IRA into their own. Children generally cannot, and in most cases have to empty an inherited account within ten years. Two deaths close together can quietly change the tax treatment of the same account.

Working two estates at once

The families who get through this without losing months are the ones who set it up correctly in week one.

Nail down the order of death first

Pull both death certificates and compare the date and time of death. If they are within five days of each other, or within any survivorship window written into either will, flag it before you file anything. Some certificates list a time; some list only a date, which becomes a problem in a close case and may require the funeral home's or hospital's records.

Open both files together

If you are serving as executor of both, petition in both estates at the same time. Same courthouse in most cases, same hearing calendar, and the judge will usually appoint you in both on the same day. Waiting to finish one before starting the other adds months for no benefit, because the creditor periods run concurrently if you start them concurrently.

Keep two of everything

Two estate bank accounts, two EINs, two ledgers. Do not pay a bill of your father's from your mother's estate account, even if it is obviously the same household bill and the same money is coming to you either way. A commingled account is the single most common reason an estate accounting gets rejected by a court, and untangling it later costs far more than keeping it clean.

Search for assets across both

Two people who shared a life had accounts neither child knew about. Old employer pensions, a dormant credit union account, savings bonds, life insurance from a job someone left in 1998. When both parents are gone, there is no one left to ask. This is where a full asset search matters most, and it needs to be run for each parent separately, because the accounts were opened under separate names and separate Social Security numbers.

The estate tax election worth knowing about

For 2026, each person has a $15 million federal estate and gift tax exemption. Most families are nowhere near it, and no return is required.

There is still a reason to pay attention. When the first spouse dies, their unused exemption can be transferred to the surviving spouse through a portability election, made by filing Form 706 for the first spouse. If the second parent survived long enough to have their own taxable estate, that transferred amount can matter. Estates that were not otherwise required to file a return generally have up to five years from the date of death to make a late portability election under a 2022 IRS revenue procedure.

If either estate is anywhere near the threshold, or if there is a family business or real estate that could grow into it, talk to a tax professional before that window closes.

How Sunset helps

Sunset was built by two people who settled their own parents' estates and found out how much of it is unpaid administrative work. We handle the parts that do not need a lawyer:

• Asset and liability discovery. We search for accounts, policies, and debts in each parent's name, so you are not guessing at what existed.
• Probate paperwork. State and county specific forms, filled from what you have already told us once, for both estates.
• An estate account. An FDIC-insured account for each estate, so the money stays separate and the accounting holds up.
• Transfers. Closing accounts and moving funds to the heirs when the court signs off.

More than 10,000 families have used Sunset, and it is free to families.

Frequently asked questions

Do we need two probates if both parents died at the same time?

Usually yes. Each parent had their own property and their own will, so each needs its own case. What the 120-hour rule prevents is the same asset passing through both estates in sequence. It does not merge the two cases.

What is the 120-hour rule?

It is a survival requirement adopted in most states. To inherit from someone, you must outlive them by at least 120 hours, five days. Anyone who does not is treated as having died first for inheritance purposes.

Can one person be executor of both estates?

Yes, and it is common. You will be appointed separately in each case and hold separate Letters, but a single person can run both. The obligation is to keep the two sets of assets, accounts, and records completely apart.

What if the parents were divorced or remarried?

Then the two estates may have nothing to do with each other, and the survival rules usually do not apply between them. A divorce revokes most spousal provisions by statute in most states. A remarriage brings a new surviving spouse with their own share. Both cases need their own analysis.

Who inherits if both parents die and there is no will?

State intestacy law decides. With no surviving spouse, children almost always take everything, split equally. If a child died before the parents, that child's share generally passes down to their own children.

Getting started

Two estates at once is a real burden, and it usually lands on one adult child while everyone else is still grieving. The order is simple even when the volume is not: confirm the dates of death, open both files at once, keep the money separate, and find out what each parent actually owned before you make any promises to anyone.

Get started with Sunset and we will handle the search and the paperwork for both.