Blended families face unique estate planning challenges in BC — stepchildren's rights, competing claims, and how to ensure everyone is protected. Here is what you need to know.
Blended families — where one or both partners bring children from a previous relationship — are one of the most common family structures in British Columbia today. Yet estate planning for blended families is significantly more complex than for traditional families, and the consequences of getting it wrong can be devastating: a surviving spouse left without resources, stepchildren left out entirely, or biological children from an earlier relationship disinherited by a second marriage.
Here is what every blended family in BC needs to understand about estate planning under BC's Wills, Estates and Succession Act (WESA).
The Core Tension in Blended Family Estate Planning
The fundamental challenge is that a will-maker in a blended family typically wants to provide for two overlapping groups whose interests can conflict:
• Their current spouse — who may need support and the family home for the rest of their life
• Their children from a prior relationship — who have legitimate moral and sometimes legal claims on the estate
A simple will that leaves "everything to my spouse" may mean biological children from a first marriage receive nothing at all. A will that protects those biological children equally may leave a surviving spouse with insufficient resources to live on. Neither outcome is what most people intend — but both are common results of poor planning.
Rights of Stepchildren Under BC Law
In BC, stepchildren do not automatically inherit from a stepparent. Under WESA's intestacy rules (what happens when there is no will), only biological and legally adopted children are entitled to a share of the estate. A stepchild who was raised by the deceased, loved as a child, and supported through childhood has no automatic legal claim.
If a stepparent wants to include stepchildren in their estate, they must do so explicitly in their will. This is equally true in reverse — if a biological parent remarries and that marriage ends (by death or divorce), the new spouse does not automatically inherit the parent's share of the estate over the children.
The Wills Variation Risk
Under Part 4 of WESA, a spouse or child of a deceased can apply to BC Supreme Court to vary the will if it fails to make "adequate provision" for their proper maintenance and support. This is one of the most powerful estate law tools in BC — and in blended families, it creates significant exposure.
A surviving spouse may have a wills variation claim against an estate that left most assets to children from a prior relationship. Conversely, biological children from a prior relationship may have a claim against an estate that left everything to a new spouse. The court will weigh the moral duty owed to each eligible person and may rewrite the will accordingly.
Good estate planning in a blended family anticipates these claims and structures the estate to minimisize the risk of a successful court challenge.
Mutual Wills and Binding Agreements
One common tool for blended families is a "mutual wills agreement" — a contract between spouses where each agrees to leave their estate in a particular way and not to change their will without the other's consent. This can protect biological children from a first marriage if both spouses commit to a shared plan.
However, mutual wills are legally complex, and courts are cautious about enforcing them. They require careful drafting and should only be used with experienced legal advice.
Life Insurance and Designated Beneficiaries
For many blended families, the cleanest solution is to use multiple legal mechanisms in combination:
• A life insurance policy with designated beneficiaries (biological children) passes outside the estate entirely — it is not subject to wills variation claims and is not divided with a spouse.
• A will or trust provides for the surviving spouse's use of the matrimonial home and support income during their lifetime.
• The estate passes to biological children after the surviving spouse's death.
This "life interest" structure is one of the most common and effective approaches for blended families with significant assets.
Testamentary Trusts for Blended Family Estate Planning
A testamentary trust (created in your will, activated at your death) is one of the most powerful tools for blended family estate planning:
Spousal trust: Assets flow into a trust for the surviving spouse's lifetime benefit — they can live in the home and receive trust income, but cannot deplete the capital. On the surviving spouse's death, the remaining capital passes to the biological children named in the trust.
Child trust: Assets for biological children are held in trust until they reach a specified age, preventing a surviving spouse from accessing them.
Testamentary trusts can be structured in almost any way, giving the will-maker precise control over who benefits, when, and how much — even after death.
What to Do if You Are in a Blended Family
The single most important step is to get a proper estate plan prepared by a BC estate lawyer. A generic online will template cannot address the complexity of competing claims, wills variation exposure, and the nuanced needs of a blended family.
Specific steps to take:
1. Inventory all assets — including RRSPs, TFSAs, pensions, life insurance, real estate — and identify which are designated-beneficiary assets (pass outside the estate) and which flow through your will.
2. Have an honest conversation with your spouse about what each of you needs and what you both want for your respective children.
3. Draft wills that reflect both the needs of the surviving spouse and the legitimate expectations of children from prior relationships.
4. Consider life insurance to provide immediately for biological children, reducing the competition for estate assets.
5. Review and update beneficiary designations on all registered accounts and insurance policies — these are often overlooked and can produce unintended results.
6. Review your plan after every significant life event: remarriage, the birth or adoption of a child, a child turning 19, or a significant change in assets.
At Sea to Sky Law™
Andrew Liggett BA JD CD has extensive experience with the estate planning needs of blended families in BC. We take the time to understand your family structure, your relationships, and your goals — and then design an estate plan that protects everyone you love, in the way you intend.
Contact us for a free intake consultation about estate planning for your blended family. We serve all of British Columbia.
*This article provides general information about BC estate law for blended families. It is not legal advice. Please consult a BC estate lawyer for advice specific to your situation.*
The main challenges are: ensuring your biological children are provided for if you predecease your new spouse; preventing your new spouse's children from inadvertently inheriting assets you intended for your own children; protecting your estate from a Wills Variation claim by your new spouse or biological children; and coordinating beneficiary designations on RRSPs, TFSAs, and life insurance with your overall estate plan.
Often yes. A spousal trust — where your surviving spouse has the right to income from assets during their lifetime, with the capital passing to your children on the spouse's death — is a common solution for blended families. It provides for the surviving spouse while ensuring your biological children ultimately receive the estate. Mutual Wills (binding promises not to change the Will after one spouse dies) are another tool, though they have limitations.
Yes. Under BC's Wills, Estates and Succession Act (WESA), a spouse has the right to bring a Wills Variation claim if your Will fails to make adequate provision for them. A new spouse who has been with you for two years or more can make this claim. Careful estate planning — including a Domestic Contract or Marriage Agreement — can limit exposure to variation claims.
If you die intestate (without a Will) in BC, your current spouse receives a preferential share of your estate — potentially at the expense of children from a prior relationship. Your biological children share a portion with the current spouse's children only if they are also yours. Step-children you have not adopted receive nothing under the intestate rules. A properly drafted Will is essential in any blended family.