The Complete Will and Guardianship Checklist for New Parents

The two documents most new parents delay longest (a will and a formal guardian nomination) take less than a day to complete and cost far less than redoing them in a crisis. This new parents will and guardianship checklist walks you through every decision in order, flags the steps that vary by state, and surfaces a few items that most guides quietly skip.

Why the Order Matters

Most checklists hand you a flat list. The problem: a will without an updated beneficiary designation can send money to the wrong person, and a guardian nomination without a funded trust can leave the right person broke trying to raise your child. Sequence matters as much as completion.

One rule before you start: every item on this list is governed by state law. What works in Texas may not be valid in Massachusetts. Treat this as a map, not a legal prescription. A licensed attorney in your state is the only person who can confirm what your specific documents require.

Step 1: Nominate a Guardian First

A guardian nomination is a written statement inside your will (or sometimes a separate document) telling a court who you want to raise your child if both parents die or become incapacitated. Courts are not bound by it, but judges give it serious weight under most states' family codes. Skip it and the choice falls entirely to a judge who never knew your wishes; here is what happens to your baby if both parents die without a will.

Who to name. Think about parenting values, stability, geography, and age, not just who loves your child most. A beloved aunt at 72 may not be the right pick for an infant. Name one primary guardian and one backup. Have the conversation with both people before signing anything; a surprised nominee can decline in court.

Married parents: name a guardian anyway. Many couples assume the surviving spouse automatically becomes sole guardian. Usually true, but not always, especially if there's a custody dispute from a prior relationship or a court questions a parent's fitness. Naming a guardian costs nothing extra and closes that gap.

Temporary guardian forms. Some states allow a separate short-form document (sometimes called a "delegation of parental authority") that lets a trusted adult act for days or weeks without going to court. Useful for extended travel. Requirements vary significantly by state; check your state court's self-help center for the correct form.

Step 2: Draft Your Will

A will does three jobs for new parents: names the guardian (Step 1), distributes your assets, and, critically, creates or funds a children's trust if your child is a minor.

Execution requirements differ by state. Most states require two adult witnesses who are not beneficiaries; some also require notarization. A handful of states accept holographic (handwritten) wills; others do not. Per the Cornell LII, the Uniform Probate Code has been adopted in full or in part by many states, but adoption is uneven. Verify your state's rules.

Name an executor you trust with paperwork. The executor gathers assets, pays debts, and files the final tax return. It doesn't have to be the same person as the guardian, and often shouldn't be, so one person isn't overwhelmed.

Step 3: Set Up a Children's Trust or Custodial Account

Minors cannot legally own significant assets outright. If you leave money directly to a child, a court will appoint a property guardian, a bureaucratic and expensive process. Two cleaner options:

Testamentary trust (created inside your will): assets pass to the trust at your death; a trustee manages them until your child reaches an age you specify, such as 25.
UTMA/UGMA custodial account: simpler and cheaper to set up, but the child receives full control at the age of majority (18 or 21, depending on state) with no ability to delay.

The Uniform Law Commission publishes both the Uniform Trust Code and the Uniform Transfers to Minors Act; their site lists which states have adopted each version.

Step 4: Update Beneficiary Designations

This is the step most guides bury. Beneficiary designations on life insurance, 401(k)s, IRAs, and bank accounts override your will entirely. An account with an outdated beneficiary (say, a parent who predeceased you) may pass to your estate and then under default rules, not your carefully written will.

Actions to take:

Pull every policy and account and read the current beneficiary line.
Update primary beneficiary to your spouse or partner (if applicable).
Add your child's trust (not your child directly) as contingent beneficiary.
Check that your employer's HR system reflects the change; many systems require a separate form.

Step 5: Sign Powers of Attorney

Two documents cover you while you're alive but incapacitated:

Durable financial power of attorney: lets your agent pay bills, manage accounts, and keep the household running.
Healthcare proxy / advance directive: lets your agent make medical decisions and documents your wishes about life-sustaining treatment.

Without these, your spouse may still need court approval to act on your behalf in some states — a slow, expensive process with a newborn at home. Requirements for signing (witnesses, notarization) again vary by state.

Document Comparison at a Glance

Core estate planning documents for new parents: what each one covers and typical complexity

Will

Primary Purpose: Asset distribution + guardian nomination
Who It Helps: Minor children, heirs
Complexity: Moderate
Must Update When: New child, divorce, move to new state

Guardian nomination (standalone)

Primary Purpose: Names guardian without full will
Who It Helps: Newborns, urgent situations
Complexity: Low
Must Update When: Guardian circumstances change

Testamentary trust

Primary Purpose: Holds assets for child until set age
Who It Helps: Children under 18–25
Complexity: Moderate–High
Must Update When: Trustee changes, age threshold review

UTMA/UGMA account

Primary Purpose: Custodial assets to age of majority
Who It Helps: Smaller amounts, simpler estates
Complexity: Low
Must Update When: Account balance grows significantly

Durable POA

Primary Purpose: Financial decisions if incapacitated
Who It Helps: Surviving spouse/partner
Complexity: Low–Moderate
Must Update When: Agent moves or declines

Healthcare proxy

Primary Purpose: Medical decisions if incapacitated
Who It Helps: Both parents
Complexity: Low
Must Update When: Relationship or values change

Beneficiary designations

Primary Purpose: Direct asset transfer, bypasses will
Who It Helps: All accounts and policies
Complexity: Low
Must Update When: Every life change

Core estate planning documents for new parents: what each one covers and typical complexity
Document	Primary Purpose	Who It Helps	Complexity	Must Update When
Will	Asset distribution + guardian nomination	Minor children, heirs	Moderate	New child, divorce, move to new state
Guardian nomination (standalone)	Names guardian without full will	Newborns, urgent situations	Low	Guardian circumstances change
Testamentary trust	Holds assets for child until set age	Children under 18–25	Moderate–High	Trustee changes, age threshold review
UTMA/UGMA account	Custodial assets to age of majority	Smaller amounts, simpler estates	Low	Account balance grows significantly
Durable POA	Financial decisions if incapacitated	Surviving spouse/partner	Low–Moderate	Agent moves or declines
Healthcare proxy	Medical decisions if incapacitated	Both parents	Low	Relationship or values change
Beneficiary designations	Direct asset transfer, bypasses will	All accounts and policies	Low	Every life change

What Most Guides Miss

The "simultaneous death" clause. Standard wills assume one spouse dies first. Add a clause specifying what happens if both parents die within a short window of each other — say, 30 days. Without it, assets might ping-pong between estates and generate two probate proceedings.

A letter of instruction. Not a legal document, but a plain-language letter telling your executor and guardian where accounts are, what passwords exist, and what your child's daily routines look like. Courts don't see it; caregivers desperately need it.

Review after an interstate move. A will valid in one state is generally recognized elsewhere under full faith and credit principles, but execution requirements differ. A trust drafted under California law may need a local attorney's review before it works smoothly in Florida. The ABA's estate planning resources outline the general framework; a local attorney confirms the specifics.

Frequently asked questions

In many states, yes — a standalone guardian nomination or a short-form parental delegation document is recognized. However, it covers only the guardian question, not asset distribution or a children's trust. Requirements and validity periods vary by state, so check your state court's self-help center for the correct form and execution rules.

A probate court appoints a guardian based on state intestacy law and the judge's assessment of the child's best interests. The court is not bound by anything the parents said informally. Assets pass under the state's default rules, which may not match what the parents would have chosen — and a court-supervised property guardianship for the child's funds adds cost and delay.

A practical benchmark: review after every major life change — a new child (including adoption), a divorce or remarriage, a move to a different state, a significant change in assets, or if a named guardian, executor, or trustee's circumstances change. Even without a life event, a full review every three to five years catches outdated provisions.

Educational information only — not financial, legal, or medical advice. HarborPlain explains the options; the decision, and any professional advice you seek, is yours.