If two people own a company fifty-fifty and one of them dies with no shareholders agreement in place, nothing forces a buy-out. The dead shareholder's half does not pass to the survivor, and the survivor is not obliged to buy it. The shares go to the estate, and then to whoever inherits them under the will or the intestacy rules, and the survivor and the family find themselves tied together as co-owners of a company on whatever terms the company's articles happen to set. That is the quiet shock behind a 50/50 company where one owner dies and there is no shareholders agreement: the survivor keeps their half and gains a new set of co-owners they never chose.

For the person left running the business, this is not a technicality. It is the difference between a clean transition and a stand-off. Without an agreement obliging either side to buy or to sell, a surviving shareholder can end up sharing ownership with a grieving spouse or adult children who have never worked in the firm, cannot agree a price for the shares, and cannot easily be bought out. Meanwhile there is a funeral to arrange and pay for, and a business that still has to open on Monday.

This page works through what the survivor and the estate can each insist on, what the default articles decide when the owners decided nothing, and why the deadlock is so hard to break once it forms.

At a glance

  • The deceased's shares pass to their estate and then to whoever inherits them. They do not pass to the surviving shareholder.
  • Without a shareholders agreement, nothing obliges either side to buy or sell. The two halves are simply stuck together.
  • A 50 per cent holder cannot force decisions through, but can block those that need shareholder approval — which is how deadlock forms.
  • Valuing the shares, with no agreed formula, is slow, contested, and a common cause of a permanent falling-out.
  • A cross-option agreement funded by life cover is what would have turned all of this into a simple, priced hand-over.

The short answer: nothing forces a buy-out, and that is the problem

People assume that when a co-owner dies their share somehow reverts to the surviving owner, the way a jointly owned house often passes to the survivor. A company does not work like that. Shares are property. On death they become an asset of the estate, to be dealt with by the personal representatives and passed on to the beneficiaries like any other asset.

So the survivor keeps their own 50 per cent and the estate holds the other 50 per cent. Neither side has a right to compel the other to trade. The survivor cannot demand to buy the shares, and the family cannot demand that the survivor buys them. In the absence of anything in writing, the two blocks of shares sit side by side indefinitely, owned by people whose interests have suddenly diverged: one wants to run a business, the other wants to be paid out and move on.

Where the shares actually go

On death the shares vest in the deceased's personal representatives — the executors named in the will, or the administrators appointed if there is no will. They hold the shares while the estate is administered, and then transfer them to the beneficiaries. Until that happens there can be a period where nobody is registered as the new holder and the estate's representatives are dealing with the company on the deceased's behalf.

Who ends up owning the half share, and when they can actually act, is not always obvious in the early weeks, and it is one of the first things a surviving director needs to establish. We have set that question out in who actually owns the company now, the family or the executors. Where the shares are inherited by a spouse, there is a further layer worth understanding about how a shareholding passes and what the survivor can expect, covered in what happens to a husband's shares when he dies.

What the model articles decide when you decided nothing

A company that never adopted a bespoke constitution runs on the standard model articles for a private company limited by shares, and it is those default rules that fill the silence left by the missing shareholders agreement. You can read them on legislation.gov.uk.

Two features matter here. First, the model articles allow the deceased's personal representatives either to be registered as members themselves or to transfer the shares to the beneficiaries — so the estate can, in time, put a named family member on the register as a 50 per cent shareholder. Second, and crucially, the model articles contain no automatic buy-out on death and no pre-emption rights forcing the shares to be offered to the surviving shareholder first. There is simply no mechanism that moves the shares to the survivor or fixes a price. That absence is the whole difficulty: the default rules keep the shares where they fall and leave the parties to negotiate everything from scratch.

The deadlock: a 50 per cent holder can block but cannot compel

A fifty-fifty split is uniquely prone to deadlock, because neither side has control and each can stop the other. It helps to separate two different levels of decision.

Day-to-day running of the company is done by its directors. If the survivor is a director, they can usually keep the business trading, sign off ordinary decisions and keep the lights on. That part often continues more smoothly than people fear.

The trouble is with decisions that need shareholder approval — changing the articles, issuing new shares, approving certain transactions, or removing a director. Those need a majority of the votes, and a 50 per cent holder on the other side can block any of them. A hostile or simply absent estate can freeze the company at the shareholder level without lifting a finger, purely by declining to agree. The survivor is not outvoted; they are stalemated. Neither owner can force the company forward and neither can force the other out.

Valuing shares nobody agreed a price for

Even where both sides want a clean separation — the survivor to buy, the family to sell — they still have to agree what the shares are worth, and with no formula written down that is where goodwill often runs out.

An independent valuation is usually commissioned, most often from an accountant, and then the argument begins about the basis. Should the value rest on a multiple of earnings, or on the net assets on the balance sheet? Should a discount apply because a 50 per cent stake is a minority holding that carries no outright control? Is the surviving shareholder's own effort part of what makes the business valuable, and should that reduce what the estate can claim? Each of these is arguable, each moves the number materially, and each side has every incentive to pull it their way. Without an agreed method, the process is slow, expensive and a frequent cause of families and former partners never speaking again.

The figure that comes out of this also decides what the estate actually banks, which the family may have been counting on. What a family realistically receives for a business interest, and how the sum is arrived at, is covered in what your family would actually receive for the business.

Running the company, and paying for the funeral, in the meantime

All of this unfolds while ordinary life demands attention. Someone has to register the death, arrange and pay for a funeral, and deal with a bank that may have frozen accounts the moment it was told. Where the deceased was a director whose signature the company relied on, even routine payments can stall.

Two practical points are worth flagging. First, the funeral bill lands before any of the corporate questions are resolved, and who is liable for it — and who can reclaim it from the estate — is not always the person who signs for it. We have set that out in two siblings, one signature: who owes the funeral bill. Second, the way the business bank account was set up governs how quickly money can move after a death; whether an account is in the company's name, a sole name or a joint name changes everything, as we explain in how a joint or sole account changes what happens at death.

Scotland and Northern Ireland

Company law is set by the Companies Act 2006 and applies across the whole of the United Kingdom, so the shareholder position — shares passing to the estate, no automatic buy-out, deadlock between two equal holders — is the same in Scotland and Northern Ireland as in England and Wales. The model articles apply throughout.

What differs is the estate machinery around the shares. In Scotland the personal representatives obtain confirmation rather than a grant of probate, and the rules on who is entitled to act follow Scottish succession law; Northern Ireland has its own probate process again. These differences affect how quickly the family can be represented and can lawfully deal with the shares, but they do not change the underlying company-law deadlock.

What would have changed all of this

Every problem on this page traces back to the same gap: no agreement, and no money set aside to act on one. The fix, put in place while both owners are alive and well, is a cross-option agreement backed by life cover.

A cross-option agreement gives the survivor the option to buy the deceased's shares and the estate the option to sell them, so that once either option is exercised the shares change hands at a pre-agreed basis of valuation. Shareholder protection cover on each owner's life provides the money to make that purchase, so the survivor is not trying to find a large sum at the worst possible moment and the family is paid promptly and fairly. Together they convert a potential deadlock into a known, funded process. You can get life insurance quotes and have an FCA-authorised broker price cover against a realistic value for each half of the business.

If you are reading this after a death rather than before one, an agreement can no longer be put in place for these shares, but understanding the deadlock is still the first step to negotiating out of it. Our guide to what dies with a business owner covers the related questions a surviving owner faces, from directorships to debts to tax.

A common mistake: assuming goodwill will substitute for an agreement

Many pairs of 50/50 owners genuinely believe an agreement is unnecessary because they trust each other, or because they assume that whoever is left will "obviously" be allowed to buy the other half at a fair price. That trust does not survive the death itself, because the person you trusted is no longer the one you are negotiating with. The estate is now represented by executors who owe their duty to the beneficiaries, not to the surviving business partner, and beneficiaries who have never met the survivor and have no reason to accept the first figure offered. Good intentions between two founders cannot bind a widow, a set of adult children, or a trust that later inherits the shares.

This is why professional advisers on both sides of a company formation routinely raise the shareholders agreement question early, and why it is worth revisiting even in a long-established business that never got round to it. The cost of drawing one up while both owners are healthy is modest against the cost — in cash, in time, and in relationships — of the alternative set out above.

Frequently asked questions

What happens to a 50/50 company when one shareholder dies?

The shares pass to the deceased's personal representatives and then to whoever inherits them. Without a shareholders agreement nothing obliges either side to buy or to sell, so the surviving shareholder and the family are tied together on whatever terms the company's articles happen to set, often for a long time.

Can the surviving shareholder run the company alone?

If they are also a director they can usually keep the business trading day to day, but any decision needing shareholder approval can be blocked by the 50 per cent holder on the other side. Deadlock at the shareholder level, rather than the running of the business, is the practical risk.

How do we value the shares if we never agreed a price?

An independent valuation is commissioned, usually from an accountant, and both sides then argue over the basis: an earnings multiple, the net assets, and whether a discount applies to a minority holding. Without an agreed formula the process is slow, contested and a common cause of a permanent falling-out.

Can the estate force the surviving shareholder to buy the shares?

No. Without a shareholders agreement, the estate has no right to compel a purchase, and cannot demand that the survivor find the money to take the shares off its hands. If the survivor genuinely cannot or does not want to buy, the family's only realistic options are to find another buyer for a minority stake in a private company — usually very difficult in practice — or to remain co-owners indefinitely, receiving whatever dividends the company chooses to pay and no more.

What if we can agree a sale price but not the payment terms?

Reaching agreement on price is often only half the battle, because a surviving shareholder frequently does not have the cash sitting to hand and neither does the company necessarily have the reserves to fund a buy-back of the shares without damaging its own working capital. Deferred consideration, paid in instalments over several years and often secured against future profits, is a common compromise, but it leaves the family waiting and exposed if the business later struggles. This is precisely the funding gap that shareholder protection cover, paid out as a lump sum at the point of death, is designed to close before it ever becomes a negotiation.