Spousal Bypass Trust UK: Keep Pension Proceeds Out of Your Spouse's Estate

When pension death benefits pass directly to a surviving spouse, they become part of the spouse's estate — and are taxed at 40% when the spouse later dies. A spousal bypass trust routes the pension proceeds into a discretionary trust instead, keeping the fund outside the spouse's taxable estate while still allowing the spouse to benefit from it. With pensions being brought into IHT from April 2027, understanding bypass trusts has never been more important.

The Second-Death Problem with Pensions

Most married pension holders nominate their spouse to receive their pension death benefits. On first death, the spouse exemption means no IHT is due — the money passes to the spouse free of tax. But those funds then sit in the surviving spouse's estate. When the spouse later dies, their entire estate — including the inherited pension pot — may be subject to 40% IHT above the nil-rate band.

For a couple with a combined estate of £1m including a substantial pension, the second-death IHT bill can run to hundreds of thousands of pounds. A spousal bypass trust addresses this by keeping the pension proceeds in a trust that is legally separate from the spouse's estate throughout the spouse's lifetime.

See our dedicated guide to pension death benefits and IHT for the underlying rules.

How a Spousal Bypass Trust Works

The structure is straightforward:

The pension holder establishes a discretionary trust during their lifetime, naming a class of potential beneficiaries: the surviving spouse, children, grandchildren, and sometimes wider family.
The pension holder completes an expression of wishes (nomination form) directing the pension scheme trustees to pay death benefits to the bypass trust.
On the pension holder's death, the pension scheme trustees exercise their discretion (guided by the expression of wishes) and pay the lump sum into the bypass trust.
The bypass trust trustees then hold the fund. They can pay income and capital to the spouse whenever needed — for living expenses, care costs, large purchases — without those payments forming part of the spouse's estate.
On the spouse's death, any remaining trust assets pass to the next generation (or other beneficiaries) outside both spouses' estates. They are subject only to the discretionary trust periodic charge (up to 6% per decade) — far less than 40% IHT.

The 2027 Pensions IHT Changes

From April 2027 (subject to consultation), unspent defined contribution pension funds will be included in the deceased's taxable estate for IHT purposes. Prior to 2027, pensions were generally outside the estate — so bypass trusts were primarily used to avoid second-death IHT, not first-death IHT.

After 2027, the position becomes more complex. If pensions are in the estate on first death, the spouse exemption may still apply to the portion paid to the spouse directly — but the spousal bypass trust structure will need to be reviewed in light of the final legislation.

Read our detailed analysis of the 2027 pensions IHT changes and what they mean for estate planning.

Expression of Wishes: What It Can and Cannot Do

The nomination form (expression of wishes) you file with your pension scheme directs the pension trustees — but does not bind them. The pension trustees have an overriding discretion to pay death benefits wherever they see fit, typically to avoid the fund falling into the estate for IHT purposes.

In practice, pension scheme trustees almost always follow expressions of wishes, particularly when the nomination is clear and up to date. But if your expression of wishes has not been updated for many years, the scheme trustees may exercise their own judgement.

Keep your expression of wishes current — update it after any major life event (marriage, divorce, birth of a child, death of a named beneficiary).

Discretionary Trust Charges on the Bypass Trust

A spousal bypass trust is a discretionary trust and is subject to the same periodic charges and exit charges as any other discretionary trust:

A 10-year periodic charge of up to 6% of the trust value above the nil-rate band, assessed every 10 years
An exit charge when capital is distributed to beneficiaries, calculated as a proportionate fraction of the most recent 10-year rate

For most families, these charges are substantially lower than the 40% IHT that would otherwise arise on the spouse's death — making the bypass trust structure financially worthwhile for pension pots above approximately £100,000–£150,000.

Frequently Asked Questions

What is a spousal bypass trust?

A spousal bypass trust is a discretionary trust set up during the pension holder's lifetime. Instead of nominating the pension to pass directly to the surviving spouse (where it would form part of the spouse's estate and be subject to IHT on the spouse's later death), the pension holder nominates the trust as the beneficiary of their death benefits. The trustees — who may include the surviving spouse — then hold the fund and can pay income or capital to the surviving spouse, children, or other beneficiaries at their discretion. Because the assets are held in trust, they are outside the surviving spouse's estate for IHT purposes, even if the spouse benefits substantially from the fund.

Why does it matter that pension proceeds go into a trust rather than directly to my spouse?

If pension death benefits pass directly to your surviving spouse, two things happen: (1) The spousal exemption from IHT means no IHT is payable on first death — good in the short term; but (2) the funds become part of the spouse's estate and will be taxed at 40% when the spouse later dies if their estate exceeds the nil-rate band (and residence nil-rate band). By routing the pension into a spousal bypass trust, the fund grows and is enjoyed by the spouse without ever forming part of their taxable estate. This can save substantial IHT on second death, particularly for large pension pots.

How do spousal bypass trusts interact with the 2027 pensions IHT changes?

From April 2027, unspent defined contribution pension funds will be brought within the scope of IHT for the first time (subject to the outcome of ongoing government consultation). Prior to 2027, pension funds passed on death were generally outside the estate entirely — making spousal bypass trusts useful for the second-death problem but not the first. From 2027, IHT may arise on first death too (for estates above the nil-rate band), making the case for a spousal bypass trust stronger or weaker depending on the final rules. If pension funds are included in the taxable estate on first death but bypass trusts are still recognised as discrete from the beneficiary's estate, the bypass trust remains valuable for the second-death problem. Always take specialist advice in light of the final 2027 legislation.

Does my spouse have a guaranteed right to income from the trust?

No. A spousal bypass trust is a discretionary trust — the trustees have discretion over who benefits and in what amounts. The spouse has no legal entitlement to income or capital. In practice, expression of wishes letters and the trustees' close relationship with the family mean the spouse will typically receive what is needed; but there is no binding obligation. This discretionary nature is what keeps the assets outside the spouse's estate for IHT. If the spouse were given a fixed entitlement to income, the trust assets might be treated as forming part of their estate under the interest in possession rules.

How is a spousal bypass trust set up?

A spousal bypass trust is usually set up by: (1) Establishing the trust deed during the pension holder's lifetime — the trust is typically a bare-bones discretionary trust with a class of beneficiaries including the spouse, children, and grandchildren; (2) Completing a pension nomination (expression of wishes) form nominating the bypass trust as the recipient of death benefits; (3) Providing the pension scheme trustees with a copy of the trust deed. The pension scheme trustees retain discretion over how to pay death benefits — an expression of wishes is not legally binding on them — but they almost always follow it. The trust itself is usually a nil-cost discretionary trust with no initial transfer (preventing an immediate CLT).

Are there disadvantages to a spousal bypass trust?

Yes. The main disadvantages are: (1) The spouse has no guaranteed access to the funds — they depend on the trustees' discretion; (2) The trust assets are subject to the discretionary trust periodic charge (up to 6% every 10 years) and exit charges — though these are usually much less than the 40% IHT saved on second death; (3) The pension scheme must agree to pay to the trust rather than to the spouse directly — not all schemes permit this; (4) Legal fees to establish the trust; (5) Ongoing trustee administration. For smaller pension pots, the costs and complexity may outweigh the IHT saving. For large defined contribution pensions, the arithmetic usually favours the bypass trust.

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This article is for general information only and does not constitute legal or financial advice. Spousal bypass trust planning is specialist work — always consult an independent financial adviser and a private client solicitor before making pension nominations or setting up a trust.