What Is Legal Succession: Wills, Probate, and Heirs

Legal succession is the process that moves a deceased person’s property, rights, and debts to the people who inherit them. It runs on one of two tracks: the instructions in a valid will, called testate succession, or a default order written into state law, called intestate succession. Which track applies depends on whether the person left a valid will, and that single fact shapes who inherits, how long it takes, and how much the process costs.

When There Is a Will

A valid will names beneficiaries for specific assets and appoints an executor to run the estate. The executor gathers assets, pays debts and taxes, and distributes what remains according to the written instructions.¹

A will can also name a guardian for minor children, set up trusts that control when beneficiaries receive money, leave gifts to charities, and disinherit relatives who would otherwise inherit by default. Without those instructions in writing, a court falls back on rules that may not match what the person wanted.

What Makes a Will Valid

Nearly every state requires the same basics. The person making the will must be at least 18 and mentally competent, meaning they understand what they own, who their family members are, and what signing the document does. The will must be in writing and signed, usually in front of two witnesses who also sign. A handful of states accept handwritten (holographic) wills without witnesses; most do not. If any required element is missing, a court can declare the will invalid, and the estate is treated as if no will existed.

When There Is No Will

Someone who dies without a valid will dies intestate, and state law decides who inherits. Every state has an intestacy statute that ranks relatives in a fixed order. Specifics differ, but the pattern is consistent: surviving spouse and children first, then parents, then siblings, then more distant relatives such as nieces, nephews, and grandparents.²

The surviving spouse’s share depends heavily on the state. In the nine community property states, the spouse already owns half of what was earned during the marriage, so intestacy only governs the deceased spouse’s half. In common law states, the spouse typically receives a statutory share ranging from one-third to the entire estate, depending on whether the deceased also left children or living parents. When a spouse and children both survive, most states split the estate in defined proportions.

Because no will names an executor, the probate court appoints an administrator. The duties mirror an executor’s: collecting assets, notifying creditors, paying debts, and distributing what remains under the intestacy statute.¹ If no living relatives can be identified, the estate eventually passes to the state through escheat, after a court-supervised search for heirs.

Assets That Skip Succession

Not everything a person owns runs through succession. Several common asset types transfer directly to a named beneficiary at death:

Life insurance proceeds go to the named beneficiary on the policy.
Retirement accounts, including 401(k)s, IRAs, and pensions, pass to whoever is listed on the beneficiary form.
Jointly owned property with a right of survivorship transfers automatically to the surviving co-owner.
Payable-on-death (POD) bank accounts and certificates of deposit go straight to the named person.
Transfer-on-death (TOD) brokerage accounts, stocks, and mutual funds work the same way for investments.
Assets held in a revocable living trust pass to trust beneficiaries without court involvement.

These designations override whatever a will says. If a will leaves a 401(k) to one person but the beneficiary form on file names someone else, the form wins. Outdated beneficiary designations are where estate plans quietly fall apart.

Debts Come Before Heirs

Before any heir receives a dollar, the estate pays what the deceased owed. Heirs are not personally responsible for those debts, which surprises many people when collectors call, but the estate’s assets are available to creditors. When assets fall short, debts are paid in a priority order set by state law:

Funeral and burial expenses are paid first in nearly every state.
Administrative costs follow, including court fees, attorney fees, and the representative’s compensation.
Taxes come next: the deceased’s income taxes, property taxes, and any applicable estate taxes.
Secured debts such as mortgages and car loans are paid against the specific property that secures them.
Unsecured debts, including credit cards, medical bills, and personal loans, have the lowest priority.

Lower-priority creditors may get partial payment or nothing. Beneficiaries inherit only what is left after valid claims are satisfied. An estate with more debt than assets is insolvent, and in that situation the heirs receive nothing from the probate estate, though non-probate assets like life insurance still pass to their named beneficiaries.

How Probate Works

Probate is the court-supervised process that carries succession out. It applies to both testate and intestate estates, with small procedural differences depending on whether a will exists.

Someone, usually the named executor or a family member, files the death certificate, the will if one exists, and a petition to open probate.¹
The court appoints the executor named in the will or, with no will, selects an administrator. It issues letters testamentary or letters of administration, which give that person legal authority to act for the estate.
The representative identifies and appraises all estate assets and reports the values to the court.¹
Creditors are notified through published notice and direct contact, with a window of typically a few months to file claims.
Valid claims, taxes, and administrative expenses are paid from estate funds.
Whatever remains goes to the beneficiaries named in the will or the heirs identified under intestacy law.¹

A straightforward estate with few assets and no disputes can close in six to nine months. Complex estates, contested wills, or hard-to-locate heirs can stretch probate past two years. Court filing fees typically run from around $50 to $500 or more, depending on jurisdiction and estate size. Attorney fees and executor compensation add to the cost, with executor pay commonly falling between 1% and 4% of the estate’s total value.

Small Estate Shortcuts

Most states offer a faster route for estates below a dollar threshold. If the probate assets are small enough, heirs can use a small estate affidavit or a simplified procedure instead of full probate. The heir presents a sworn statement and a death certificate to the institution holding the asset, such as a bank, and the asset is released without a court order.

Thresholds vary widely. Some states set the cap as low as $15,000 to $25,000; others allow simplified procedures for estates up to $100,000 or even $200,000. A few states apply different limits for surviving spouses. The caps generally measure only probate assets, so life insurance proceeds and retirement accounts with named beneficiaries do not count against the limit.

Taxes the Representative Handles

Settling an estate involves several tax filings, and missed deadlines create penalties that come out of the inheritance.

The representative files a final federal income tax return (Form 1040) for the year the person died, plus any prior year returns that were due but never filed. State income tax returns may also be required. These cover income earned up to the date of death.¹

If estate assets generate more than $600 in income after the person’s death from interest, rent, dividends, or similar sources, the representative must obtain an employer identification number and file Form 1041, the estate income tax return.¹

Federal estate tax applies only to estates whose total value exceeds the basic exclusion amount, set at $15,000,000 per person for 2026 by the One, Big, Beautiful Bill Act, signed into law on July 4, 2025.³ Estates above that line face a top marginal rate of 40%. Most estates fall well below the exemption and owe no federal estate tax. Some states impose their own estate or inheritance taxes with lower thresholds, so state rules deserve a separate check.

Challenging a Will

A will is not automatically the final word. Interested parties, meaning people who would inherit if the will were thrown out (heirs, named beneficiaries, or estate creditors), can challenge it in court. Disagreement with how assets were divided is not a ground. The challenger must prove one of a few recognized legal grounds:

Lack of testamentary capacity: the person did not understand what they owned, who their family was, or what signing meant.
Undue influence: someone pressured or manipulated the person into provisions that benefited the influencer.
Fraud: the person was tricked into signing, or the document was altered after signing.
Improper execution: the will was not signed, witnessed, or notarized as the state requires.

Will contests are expensive and hard to win. Courts start from the presumption that a properly executed will is valid, and the burden sits on the challenger. Every state imposes a deadline to file a contest after the will is admitted to probate, often only a few months. Miss that window and the will stands regardless of its flaws.

Courts can also remove an executor who mismanages assets, fails to file tax returns, uses estate funds personally, or refuses to communicate with beneficiaries. Beneficiaries need concrete evidence of wrongdoing, not just a suspicion that something is off.

1
Internal Revenue Service. Responsibilities of an Estate Administrator
2
Legal Information Institute. Intestate Succession
3
Internal Revenue Service. What’s New – Estate and Gift Tax