How do you plan retirement while supporting a disabled adult child?

01 The objective is different

Ordinary retirement planning funds a period that ends at your death. Here it has to fund a period that continues afterwards, potentially for decades, and the money has to be managed by someone else through all of it.

That changes the arithmetic. A withdrawal rate calculated against your own life expectancy is too high; the horizon is the beneficiary's, and it starts later. A plan that runs the portfolio down deliberately, which is reasonable for a couple with no dependants, is not available.

It also changes the asset allocation, because the horizon is longer and the income requirement continues. A portfolio de-risked for a twenty-year retirement is not right for a fifty-year obligation.

It changes the spending question too. A couple with no dependants can reasonably plan to run the portfolio down and spend more in the early years, on the basis that what is left over is a bonus. Here what is left over is the plan, so the early-retirement spending that ordinary advice encourages is the thing to be cautious about.

On the defaults above, the worked example shows £660,000. Funding only your own lifetime needs £300,000; the obligation as a whole is £660,000 in today's money.

Source: Plan your retirement income

02 Nothing outright, ever

Money left or given directly becomes the beneficiary's capital, and capital ends means-tested benefits and changes local authority care funding. A trust holds the money without it being theirs, which is the mechanism the whole plan depends on.

That applies to everything: the will, life policies, the pension expression of wish, and anything left by other relatives. Each of those is a separate document and each has to point at the trust rather than at the individual.

It also applies to well-meant informal help. Paying money into the beneficiary's account is a transfer of capital, and regular payments can be treated as income. Trustees paying suppliers directly avoids both.

One practical consequence is worth naming. Where a trust is already in place, the simplest instruction to give anyone who asks how to help is the trust's name and the fact that legacies should go to it. That is a single sentence, and it is the one sentence that keeps the arrangement intact.

Source: Trusts and taxes

03 The benefits and care side

Establish what the beneficiary receives and on what basis: Personal Independence Payment is not means tested and is unaffected by capital; Universal Credit and other means-tested support are. Local authority care funding has its own means test with its own limits.

Those interactions decide what the trust should pay for. Trustees can fund holidays, equipment, transport, therapies and anything else the state does not provide, without affecting entitlement — but paying for something the benefit is intended to cover can reduce it.

This is specialist territory and it changes with policy. A written note of the current position, reviewed periodically, is more useful to future trustees than a general instruction to be careful.

Source: Personal Independence Payment

04 Who takes over

Trustees have to outlive you and be willing to act for decades. Appointing a mix — a family member who knows the beneficiary and a professional who will still exist in thirty years — is the common answer, and naming replacements matters more here than in an ordinary trust.

Siblings are often appointed and the burden on them should be acknowledged rather than assumed. A conversation while you are able to have it is worth more than any provision in a document.

And put both lasting powers of attorney in place for yourself, because a period where you lose capacity before you die is the gap in which the arrangement is most exposed.

It is also worth reviewing the trustees periodically rather than appointing them once. People move, fall out, become unwell and lose interest across the decades this arrangement has to last, and a trust with a single ageing trustee and no replacement named is a problem waiting for the worst moment to appear.

Source: Lasting power of attorney

05 The document nobody writes

Write down how everything works. What the beneficiary needs, day to day. Which benefits they receive and what triggers a review. Which professionals are involved. Where the money is, who administers it, and what the trust is for.

That document is worth more than any investment decision, because the risk in this plan is not market risk — it is that the person who understood the arrangement is no longer there to explain it.

Update it annually alongside the financial review. A letter of wishes to the trustees does part of the job; a practical handover note does the rest.

Source: Care and support statutory guidance