Should You Update Your Will When Having a Baby?

8 min read

Published: 25 April 2026

Last reviewed: April 2026

This guide is for information only and does not constitute financial advice. Always speak to a qualified financial adviser before making financial decisions.

The arrival of a new baby is a whirlwind of joy, sleep deprivation, and a sudden, overwhelming sense of responsibility. In between the midnight feeds and the endless laundry, your mind naturally turns to the future. You want the best for your child—the best education, a safe home, and a secure financial foundation. However, amidst the excitement of nursery planning, one of the most critical tasks often falls to the bottom of the "to-do" list: making a will after having a baby.

It is an uncomfortable topic to broach. No new parent wants to spend their precious free moments contemplating their own mortality. Yet, a Will is perhaps the single most important document you will ever sign for your child. It is the only legal mechanism that ensures your wishes are respected and, more importantly, that your child is cared for by the people you trust most. Without one, the law—not you—decides who raises your child and how your hard-earned assets are distributed.

In the UK, the legal landscape surrounding inheritance and guardianship is rigid. Whether you are a first-time parent or adding to your growing family, updating or writing a Will is no longer just about who gets the family silver; it is about providing certainty in an uncertain world. This guide explores everything you need to know about protecting your family’s future in 2025 and beyond.

The Legal Reality: What Happens if I Die Without a Will?

When someone dies without a valid Will in England and Wales, they are said to have died "intestate." In this scenario, the Rules of Intestacy apply. These are strict, one-size-fits-all legal defaults that rarely align with a modern family's needs. If you are asking yourself, "what happens if I die without a will?", the answer depends heavily on your marital status and the value of your estate.

For parents, the risks of intestacy are significant. If you are unmarried or in a cohabiting relationship, your partner may receive nothing at all from your estate, potentially leaving them unable to maintain the family home while raising your child. Even for married couples, if your estate is valued above certain thresholds (currently £322,000 for the statutory legacy), the distribution can become complex, with assets split between your spouse and your children in a way that might not be tax-efficient or practical.

The Danger for Unmarried Parents

It is a common myth in the UK that "common law marriage" provides legal protection. It does not. If you are not married or in a civil partnership, your partner has no automatic right to inherit your assets under intestacy. This could lead to a situation where your children inherit everything, but your partner is left with no legal right to the funds needed to support them day-to-day.

Warning: If both parents pass away without a Will, the courts will decide who becomes the legal guardian of your child. This process can be lengthy, stressful, and may result in your child being placed with someone you would not have chosen.

The Most Important Clause: Guardianship in a Will

For most parents, arranging guardianship in a will is the primary motivation for seeking legal advice. A guardian is the person who will take on legal parental responsibility for your child if you (and the other parent with parental responsibility) pass away before the child reaches 18.

Choosing a guardian is a deeply personal decision. You are looking for someone who shares your values, has the emotional capacity to raise a child, and preferably, someone your child already knows and loves. By naming a guardian in your Will, you provide an immediate legal framework for your child’s care, avoiding the need for the family courts to intervene during a time of grief.

Key Considerations for Choosing a Guardian:

Values and Lifestyle: Does the person share your views on education, religion, and discipline?
Location: Would the child have to move schools or even countries?
Financial Stability: While you will likely provide for the child via your estate, does the guardian have the space and stability to accommodate a new family member?
Age and Health: Are the grandparents the best choice for the next 18 years, or would a sibling be more appropriate?

Making a Will After Having a Baby: Your Financial Options

When writing a will in the UK, residents have several paths to choose from. The "best" way depends on the complexity of your finances and your family structure. With the inheritance tax (IHT) nil-rate band currently frozen at £325,000 until April 2028 (and the residence nil-rate band at £175,000), professional planning is often necessary to ensure you aren't leaving your children with a significant tax bill.

Method	Estimated Cost	Pros	Cons
DIY Will Kits	£20 – £50	Inexpensive and quick.	High risk of errors; may not be legally binding if witnessed incorrectly.
Online Will Services	£100 – £200	User-friendly; usually checked by a specialist.	Not suitable for complex estates or step-families.
Solicitor-Drafted Will	£300 – £800+	Highly secure; includes professional tax and trust advice.	Most expensive option.
Free Wills Month/Charity Schemes	Donation suggested	Professional service at low cost.	Only available at certain times of the year.

Using Trusts to Protect Your Child's Inheritance

If your children are young, you probably don't want them receiving a large lump sum of money on their 18th birthday. When making a will after having a baby, you can incorporate a "Will Trust." This allows you to appoint trustees (often the same people as your executors) to manage the money until your child reaches a more mature age, such as 21 or 25. The trustees can still release funds earlier for the child's "maintenance, education, or benefit"—for example, to pay for school uniforms or university fees.

Worked Example: The Power of a Trust

James and Sarah have a newborn son, Leo. They have a combined estate of £600,000, including their home and life insurance. In their Wills, they stipulate that if they both pass away, the money is held in a Bereaved Relevant Child Trust. Their chosen trustees (Sarah's brother and James's sister) manage the funds. They use the money to pay for Leo's upbringing. Leo receives 10% of the capital at age 21 to help with a house deposit, and the remainder at age 25. This prevents Leo from potentially mismanaging a large inheritance at 18.

The New Parent's Will Checklist

Before you sit down with a solicitor or open an online drafting tool, you need to gather your thoughts. Use this checklist to ensure you have covered the essentials for your new family unit.

Identify your Executors: These are the people who will handle the paperwork and distribution of your estate. They should be organised and trustworthy.
Choose your Guardians: Have you asked them if they are willing to take on this role? It is a huge commitment.
List your Assets: Include property, savings, ISAs, pensions, and life insurance policies.
Digital Assets: Don't forget your digital life—photos, social media, and cryptocurrency.
Specific Legacies: Are there sentimental items you want your child to have, such as jewellery or family heirlooms?
Funeral Wishes: Do you want a burial or cremation? While not legally binding, stating this in your Will helps your family during a difficult time.

Step-by-Step: How to Write Your Will in the UK

If you are ready to move forward, follow these steps to ensure your Will is robust and legally sound for the 2025/26 tax year.

Value your estate: Calculate the total value of everything you own. If it’s over £325,000, consider seeking inheritance tax advice.
Decide on your distribution: Who gets what? Consider "Mirror Wills" if you are a couple, which are two separate Wills that reflect each other's wishes.
Draft the document: Choose your method (Solicitor, Online, or DIY). Ensure the language is clear regarding the appointment of guardianship in a will.
Sign and Witness: In the UK, a Will must be signed in the presence of two independent witnesses who are not beneficiaries. If this is done incorrectly, the Will is void.
Store it safely: Keep your Will in a secure place—a fireproof safe, with your solicitor, or with the National Will Archive. Tell your executors where it is.
Review regularly: Life changes fast. Review your Will every 3-5 years or after major life events like marriage, separation" class="text-brand-600 hover:text-brand-800 underline">divorce, or having more children.

Tip: Don't forget your "Expression of Wishes" for your pension. Pensions sit outside your estate for inheritance tax purposes and are not covered by your Will. You must contact your pension provider directly to name your child or partner as a beneficiary.

Inheritance Tax (IHT) and the Residence Nil-Rate Band

For parents in 2025, understanding the "Family Home Allowance" (Residence Nil-Rate Band) is vital. As long as you leave your main residence to your "direct descendants" (children or grandchildren), you can claim an additional £175,000 tax-free allowance on top of your £325,000 nil-rate band. For a married couple, this means you can potentially pass on an estate worth £1 million entirely tax-free.

However, to claim this, your Will must be structured correctly. If you leave your home into certain types of complex discretionary trusts, you might inadvertently lose this valuable tax break. This is why professional advice is often worth the initial investment when making a will after having a baby.

Official Sources & Further Reading

Key Takeaways

Guardianship is non-negotiable: A Will is the only way to legally name who will raise your child if you are gone.
Intestacy is a risk: Dying without a Will leaves your family's future to rigid, outdated laws, which is particularly dangerous for unmarried couples.
Trusts offer control: Use Will Trusts to ensure your children inherit at a mature age (e.g., 21 or 25) rather than 18.
Update for tax efficiency: Ensure your Will takes advantage of the Residence Nil-Rate Band to protect your child's inheritance from 40% IHT.
Don't forget pensions: Update your pension "Expression of Wishes" forms alongside your Will; they are handled separately.

Frequently Asked Questions

Why is updating my will important after having a baby?

Having a baby is a major life event that changes your responsibilities. Updating your will ensures your child is named as a beneficiary, allows you to appoint legal guardians, and ensures your assets are distributed according to your wishes, not by intestacy rules.

What happens if I die without a will in the UK after having a baby?

If you die without a valid will (intestate), UK law dictates how your assets are distributed, which might not align with your wishes. Crucially, without a will, you have no legal say over who becomes your child's guardian; this decision would fall to the courts.

How do I appoint legal guardians for my child in a will?

You can appoint legal guardians by clearly stating their names and backup choices in your will. It's essential to discuss this with your chosen guardians beforehand to ensure they are willing and able to take on this responsibility. A solicitor can help you draft this correctly.

Can I just add an amendment (codicil) to my old will when I have a baby?

While a codicil can amend minor details, for significant life changes like having a baby, it's generally safer and clearer to create an entirely new will. A new will revokes all previous ones, preventing any confusion and ensuring all new arrangements are comprehensively covered.

What other financial planning should I consider alongside making a will after having a baby?

Beyond your will, consider essential protections like life insurance to provide for your family. Also, ensure you've nominated beneficiaries for your pensions, understand how jointly owned assets are held, and consider setting up a Lasting Power of Attorney to protect against incapacity.

How much does it cost to write a Will in the UK?

A basic DIY kit can cost as little as £20, while an online service typically ranges from £100 to £200. For a solicitor-drafted Will, which is recommended for parents to include guardianship and trust clauses, expect to pay between £300 and £800.

Can I just name a guardian in a letter instead of a Will?

While a letter of wishes can provide guidance, it is not legally binding. To ensure your choice of guardian is legally recognised and to avoid potential court battles, you must name them within a valid, witnessed Will.

Do I need to update my Will for every subsequent child?

Not necessarily. Most professionally written Wills use the term "my children" or "my issue" to cover all current and future offspring. However, it is always wise to review your Will with each birth to ensure your executors and guardians are still appropriate.

What is a Mirror Will and is it right for new parents?

Mirror Wills are two separate documents for couples that are almost identical, typically leaving everything to each other and then to the children. They are a cost-effective way for parents to ensure they have a unified plan for guardianship and inheritance.

What happens to my life insurance if I die without a Will?

Life insurance is usually paid directly to the named beneficiaries on the policy. However, if no beneficiary is named or if they are minors, the money may fall into your estate and be subject to intestacy rules, which can cause delays and potential tax issues.

How much does it cost to write a Will in the UK?

Can I just name a guardian in a letter instead of a Will?

Do I need to update my Will for every subsequent child?

What is a Mirror Will and is it right for new parents?

What happens to my life insurance if I die without a Will?

How much does it cost to write a Will in the UK?

Can I just name a guardian in a letter instead of a Will?

Do I need to update my Will for every subsequent child?

What is a Mirror Will and is it right for new parents?

What happens to my life insurance if I die without a Will?

Disclaimer: This guide is for information only and does not constitute financial advice. Always speak to a qualified financial adviser before making financial decisions.