If your house and your bank account are both in joint names, it is easy to conclude that a will would be pointless: whatever you own, your partner already owns too, so when one of you dies the other simply carries on. That reasoning is half right, and the missing half is where families come unstuck. Yes, you still need a will even when everything is jointly owned. Survivorship deals with the first death, passes the jointly held things to the survivor, and then stops. Everything it does not reach, and that turns out to be most of the things that matter, is left exactly as unarranged as it was before.

The reassuring picture, that joint ownership has quietly handled your affairs, holds for the first few weeks after a death and for the specific assets held in both names. It falls apart the moment you look past them: at sole accounts, at pensions, at what happens on the second death, and above all at your children, for whom joint ownership does nothing at all.

This page lists what survivorship does not touch, so you can see the three-quarters of the problem that is still open even when the house and the current account are in both your names.

At a glance

  • Survivorship passes jointly held assets to the surviving owner on the first death, and does nothing else.
  • It does not appoint a guardian for your children, which is the single biggest reason parents still need a will.
  • Sole accounts, possessions and anything in one name alone still pass under a will or the intestacy rules.
  • Pensions and most life policies pass by nomination, not by survivorship and not by your will.
  • Survivorship says nothing about the second death, or about what happens if you both die together.

The short answer: survivorship covers the first death and nothing else

Joint ownership works through a rule called survivorship. Where an asset is held as a beneficial joint tenancy, whether that is a house held as joint tenants or a joint bank account, the deceased's interest passes automatically to the surviving owner the moment they die. It happens outside the will, without waiting for probate, and it is quick and clean. That is the strength people are relying on when they say a will is unnecessary.

But survivorship only does one thing: it moves a jointly held asset to the co-owner. It appoints nobody, guards nobody, and provides for nothing beyond that transfer. It cannot look after your children, it cannot deal with anything held in a single name, and it has nothing to say about what happens when the surviving owner dies in turn. A will is not competing with survivorship; it is doing all the jobs survivorship cannot.

What survivorship actually does

Give survivorship its due, because within its lane it is genuinely useful. A home held as joint tenants passes to the survivor without probate and without a transfer under the will. A joint current account normally passes to the surviving account holder, and the bank will usually move it into their sole name once shown the death certificate, so the survivor is not locked out of day-to-day money while the estate is sorted.

Two cautions sit inside that comfort. First, joint ownership of a home only passes by survivorship if you hold it as joint tenants; if you hold it as tenants in common, the deceased's share passes under their will or the intestacy rules instead, which is a completely different outcome and one many couples do not realise applies to them. If you are not sure which you are, start with joint tenants or tenants in common: which are you. Second, a will cannot override survivorship on a true joint tenancy, so a gift of the house in your will is simply ignored where survivorship applies, a trap we set out in why your will cannot give away a house held as joint tenants.

What it does not touch

Now the list that matters. Survivorship reaches jointly held assets and nothing else, which leaves a great deal outside it.

  • Anything in a sole name. A bank account, a savings account, an investment or a car in one person's name alone does not pass by survivorship. It forms part of that person's estate and passes under their will, or under the intestacy rules if there is no will. A sole account is frozen on death and often needs a grant of probate to release, however small the joint accounts make things look.
  • Possessions. The contents of the house, jewellery, tools, a wedding ring, all pass under the will or intestacy, not by survivorship. These are the things families argue over most, and the argument is worse when nothing is written down.
  • Pensions. Most workplace and personal pensions are paid at the discretion of the scheme trustees, guided by the nomination form you completed, not by your will and not by survivorship. An out-of-date nomination can send a pension to the wrong person entirely, and no will corrects it.
  • Life policies. A life policy written in trust pays the people named in the trust, again outside both the will and survivorship. One that is not in trust falls into the estate and follows the will or intestacy.

The practical sting is timing. The jointly held money moves to the survivor within days, so at first it looks as though everything has been dealt with. Then the sole accounts surface. A savings account, an ISA or an investment held in one name alone is frozen the moment the provider is told of the death, and above a fairly modest threshold the provider will not release it without a grant of probate. Obtaining that grant is far simpler where there is a will naming an executor; without one, someone has to apply to administer the estate under the intestacy rules first, which is slower. Families are caught out again and again, believing joint ownership handled everything, only to find a sole account locked shut for months at exactly the point they need the money.

The children: the part survivorship cannot help

If you have children under eighteen, this is the section that should end the debate about whether you need a will. Survivorship can pass a house to your partner, but it cannot appoint anyone to raise your children, and nothing else can do that job for you in advance. A guardian for your children is appointed in a will (or in a separate signed, dated appointment), and only a parent with parental responsibility can make that appointment. Without it, if both parents die, who raises your children is decided without your voice in it, by the family reaching agreement or, where they cannot, by the family court.

Money for the children is the same story. Under the intestacy rules a child's inheritance is held on statutory trusts until they turn eighteen, then handed over in full, whatever state that eighteen-year-old is in to receive it. A will lets you hold it back to a later age, appoint trustees you trust, and set out how it should be spent in the meantime. It also lets you decide whether the people raising your children receive a single lump sum or a regular income to do it, a choice worth thinking through with lump sum or monthly income for the people raising them, and to record your reasoning for the guardians in a letter of wishes for the people raising your children. None of this exists without a will, and survivorship touches none of it.

When the survivor dies, or you die together

Survivorship is silent about the second death, and that is where a jointly owned estate can go badly wrong. Suppose everything passes to your partner on your death, as planned. Your partner now owns the lot in their sole name, and if they never make a will, their whole estate, including everything they inherited from you, passes under the intestacy rules when they die. If they have since remarried, much of it can pass to a new spouse and away from your children. Joint ownership solved the first death and set up the second one to be decided by rules you never chose.

This is not a rare edge case. Second relationships are common, and the sequence of one partner inheriting everything jointly, then remarrying and either making no will or making one that favours the new spouse, is one of the most frequent ways children are unintentionally disinherited. Joint ownership did nothing wrong; it simply handed the whole estate to a survivor whose later choices it could never bind. A pair of wills that provide for each other and then, on the second death, direct the estate to the children, closes the gap that survivorship leaves wide open.

Dying at the same time is the other gap. Where two people die together and the order of their deaths cannot be established, the law presumes the elder died first. With no wills, each estate then passes down the intestacy chain, any children's shares are held on statutory trusts until eighteen, and, critically, neither of you has appointed a guardian, so the very event most likely to leave children parentless is the one survivorship and intestacy handle worst. A pair of mirror wills naming the same guardian and the same substitute beneficiaries removes that whole risk, and lets you decide where the money goes rather than leaving it to a presumption about who was older.

The mortgage does not stop

One more thing joint ownership does not do: it does not clear the mortgage. Where a home passes to the survivor by survivorship, the mortgage on it passes too, and the survivor remains fully liable for it. There may be no probate needed to deal with the house, which sometimes fools a grieving family into thinking there is nothing to sort out, but the lender still expects the monthly payments, on time, from the day after the death. We set that trap out in no probate needed, but the mortgage still needs paying, and the version where a former partner is left carrying it in your ex died and you are still on the mortgage.

This is where a will and life cover meet. The will decides who gets what; life cover decides whether the survivor can afford to keep it. A level term policy sized against the mortgage and the family's outgoings gives the survivor the means to stay in the home and provide for the children, rather than inheriting a house they then cannot afford to keep. If you have wills in place but have never checked whether the cover would actually clear the debt, you can get life insurance quotes and have an FCA-authorised broker price it against your real balance and term.

Scotland and Northern Ireland

The core point holds across the UK: joint ownership deals with jointly held assets on the first death and leaves everything else to a will or to intestacy. The machinery differs by nation. In Scotland, property is not held as joint tenants in the English sense; a title may contain a survivorship destination that passes the deceased's share to the co-owner, but Scottish intestacy and the legal rights of a spouse and children work very differently from the rules in England and Wales, and a child's inheritance can vest earlier than eighteen. In Northern Ireland the concepts are closer to England and Wales, but the intestacy figures and some of the detail are its own.

In all three, the same conclusion stands: joint ownership is not a substitute for a will, and it is least adequate exactly where it matters most, the children. The full set of decisions, from appointing a guardian to funding them and dealing with the intestacy rules, sits in our guide to wills, guardianship and children.

Frequently asked questions

Do I need a will if everything is in joint names?

Yes. Survivorship deals with jointly held assets on the first death and nothing else. It does not appoint a guardian for your children, cover sole accounts, pensions or possessions, or say what happens when the survivor dies in turn. Those are exactly the jobs a will exists to do, and they are still undone however much is held jointly.

Does a joint bank account pass automatically?

Usually the balance passes to the surviving account holder, and the bank will normally transfer the account into their sole name once shown the death certificate, so the survivor is not left without day-to-day money. It can still be counted in the estate for inheritance tax, depending on who actually provided the money in the account.

What if we die at the same time?

Where the order of death cannot be established, the law presumes the elder died first. With no wills, the estates then pass down the intestacy chain, any children's shares are held on statutory trusts until eighteen, and neither of you has appointed a guardian, which is the worst outcome in precisely the situation most likely to leave children with no parent.