A second marriage can bring happiness and stability, but it can also change where family wealth eventually ends up. If you want to know how to protect inheritance from remarriage, the central issue is simple: leaving assets to a surviving spouse outright may mean you lose control of what happens after their death. They may make a new will, spend the money, give it away, or leave it to a new husband or wife rather than to your children.
This is a particular concern where there are children from a first relationship, a family home, a property portfolio or business interests that have taken years to build. The right plan can look after your spouse or partner during their lifetime while preserving the underlying inheritance for the people you choose.
Why remarriage can put an inheritance at risk
A will only controls what happens to your estate when you die. Once an asset has passed to someone outright, it is generally theirs to deal with as they wish. Your intentions may have been entirely clear, but they are not legally binding on the person who inherits.
A common arrangement is for each partner to leave everything to the other, with an understanding that the children will inherit later. These are often called mirror wills. They may be suitable in straightforward circumstances, but they do not provide reliable protection after the first death. The surviving partner can change their will at any time, including after meeting someone new or remarrying.
There is another point that catches many families out. In England and Wales, marriage usually revokes an existing will unless that will was specifically made in contemplation of that particular marriage. If a surviving spouse remarries and does not make a valid new will, the rules of intestacy may decide who receives their estate. That outcome may be very different from the first spouse’s wishes.
The risk is not always deliberate. Later-life care costs, financial pressure, family relationships and differing priorities can all affect what remains. Good estate planning does not assume the worst of anyone. It puts clear legal safeguards around assets where the eventual destination matters.
How to protect inheritance from remarriage with a trust
For many blended families, a trust created in a will is the most practical way to balance protection with fairness. Instead of leaving the family home or investments directly to a spouse, you can place them into a trust on your death.
A life interest trust, sometimes called an interest in possession trust, is frequently used in this situation. It can give your surviving spouse the right to live in a property for their lifetime, or receive income from investments, without giving them ownership of the underlying capital. When they later die, or when the trust ends under its terms, the assets can pass to your children or other named beneficiaries.
This can provide real reassurance. Your spouse is not left without a home or financial support, while the capital is ring-fenced for the next generation. It can be particularly valuable where the home represents a large proportion of the estate or where there are children on both sides of a blended family.
The terms need careful drafting. You may want your spouse to remain in the property for life, but also allow them to move to a smaller home if their needs change. You may need to decide who pays for insurance, repairs and major maintenance. You should also consider what happens if they move into long-term care, cohabit with someone else, or no longer need the property.
A discretionary trust can offer greater flexibility in some families. Trustees decide when and how beneficiaries receive funds, taking account of changing circumstances. That flexibility is useful where children are young, beneficiaries are financially vulnerable, or the estate includes investments or business assets. It also means you must appoint trustees who are capable, impartial and willing to act over the longer term.
Protect the family home by changing the ownership
Your will cannot control a property that automatically passes outside your estate. This is a crucial distinction for couples who own their home as joint tenants.
When joint tenants own a property, the surviving owner automatically becomes entitled to the whole property on the first death. The property does not pass under the deceased’s will. If the survivor later remarries, that home may form part of their estate and could ultimately pass away from the first family.
Owning the property as tenants in common is often more suitable where inheritance protection is needed. Each owner has a defined share, commonly 50 per cent, which can pass under their will into a trust. The surviving spouse can still be given the security of living in the home, but the deceased’s share is protected for the chosen beneficiaries in the future.
Changing the ownership is known as severing the joint tenancy. It is a legal step that should sit alongside a properly drafted will and, where relevant, a declaration of trust confirming the shares each person owns. It is not a one-size-fits-all solution. If one partner contributed substantially more, or if the property is held for business or investment purposes, the ownership structure needs to reflect the facts accurately.
Do not overlook pensions, life policies and business assets
Not every valuable asset passes through a will. Pension death benefits are often paid at the discretion of pension scheme trustees, based on an expression of wishes form. If that form is out of date, the scheme may not have clear evidence of your current intentions.
Life insurance can also require separate planning. A policy written in trust may pay more quickly and can keep proceeds outside the estate in appropriate cases, but the right arrangement depends on the policy, intended beneficiaries and wider tax position. Review nominations and beneficiary details after divorce, bereavement, a new relationship or a significant change in wealth.
For business owners, shares and partnership interests deserve equal attention. An outright gift to a spouse may leave your children financially exposed or could place business control in hands you did not intend. Your will, shareholders’ agreement, articles of association and any business protection insurance should work together. A succession plan should identify who can run the business, who should benefit from its value and how surviving owners can obtain the shares fairly.
Choose trustees with care
Trustees hold legal responsibility for trust assets and must act according to the trust terms. The role can involve managing property, investing money, keeping records, dealing with tax returns and making decisions between family members with different interests.
Many people appoint a spouse alongside an adult child or another trusted relative. This can work well, but it can also create tension where the surviving spouse needs support and the children are concerned about preserving their inheritance. An independent professional trustee may be appropriate for larger estates, property portfolios or families where disputes are more likely.
The best choice depends on the complexity of the assets and the personalities involved. What matters is that trustees understand their duties and that the will gives them workable powers to manage changing circumstances.
Be clear, but recognise the limits of a letter of wishes
A letter of wishes can explain the thinking behind your plan. It may help trustees understand that you want a spouse to be comfortable while ensuring children inherit later. It can also address practical points, such as whether a property should be retained or sold if the survivor moves.
However, a letter of wishes is not normally legally binding. It should support a professionally prepared will and trust, not replace clear legal provisions. Similarly, a promise between partners that neither will change their will is rarely a dependable substitute for proper asset protection.
Open conversations can still be helpful. Explaining the purpose of the arrangement while everyone is alive can reduce suspicion and prevent avoidable conflict later. The conversation is about setting fair expectations, not forcing family members to agree with every decision.
Review your plan as life changes
Estate planning is not a document to put in a drawer and forget. A will may need reviewing after marriage, divorce, separation, the birth of children or grandchildren, buying or selling property, receiving an inheritance, retirement, or changes to a business.
Tax rules and care funding considerations can also affect which trust structure is appropriate. A trust is not automatically a tax-saving device, and it should never be selected solely on the basis of a broad promise of tax savings. The priority is to ensure the structure achieves your family and succession objectives, with tax considered as part of the wider picture.
If you already have mirror wills, jointly owned property and children from an earlier relationship, it is worth obtaining advice before circumstances change. The Legacy Wills Company can help assess the risks in your current arrangements and build a bespoke plan around the assets and people you want to protect.
The strongest plans do not ask a surviving spouse to choose between their own security and your children’s future. They make room for both, with clear instructions in place before those decisions become difficult.