Cross-Option Agreements and Buy-Sell Agreements: Mechanics, Drafting, and Interaction with Life Assurance
When a business owner dies or suffers a critical illness that prevents them from working, two outcomes are possible. In the first — and more desirable — scenario, the surviving shareholders buy the deceased's or incapacitated owner's shares from the estate at a fair price, the business continues, and the family receives cash rather than an illiquid share in a business they may not want and cannot manage. In the second scenario, the shares pass to whoever inherits them, the surviving shareholders find themselves in business with a beneficiary who may have entirely different objectives, and the business is paralysed by deadlock, litigation, or forced sale.
Cross-option agreements and buy-sell agreements are the legal mechanisms designed to ensure the first scenario happens. Life assurance provides the cash to fund it. Getting both elements right — and ensuring they work together — is the purpose of this guide.
As of 2026, cross-option and buy-sell arrangements for UK and international businesses are standard practice but must be carefully drafted. Tax treatment varies by jurisdiction. This guide is informational and does not constitute legal or tax advice.
What Is a Cross-Option Agreement?
A cross-option agreement (sometimes called a "double option" agreement) is a legal agreement between business owners — typically shareholders in a limited company — that creates reciprocal rights and obligations on the death or critical illness of one of them.
It has two limbs:
The put option — the deceased's estate (or the incapacitated shareholder) has the right to sell the shares to the surviving shareholders at a pre-agreed price or valuation methodology.
The call option — the surviving shareholders have the right to buy the shares from the estate or incapacitated shareholder at the same price or methodology.
The critical design feature is that neither party is obliged to exercise an option — each party only has a right. The agreement works because both sides will typically want to exercise their respective option: the estate wants cash, the surviving shareholders want the shares. The options "cross" in the sense that they mirror each other.
Why an Obligation Would Create a Tax Problem
If the agreement were drafted so that the estate must sell and the survivors must buy, this would create a "binding contract for sale" from the date of the agreement — not from the date of death. Under UK inheritance tax rules, assets subject to a binding contract for sale at a specific price are valued at the contract price rather than their open market value, and critically, they may not qualify for Business Relief (BR, formerly Business Property Relief).
Business Relief can reduce the value of qualifying shares in trading companies by up to 100% for IHT purposes. Note that from 6 April 2026 the 100% rate of BR (and Agricultural Property Relief) is capped at £2.5 million per individual estate — raised from the £1 million originally announced — and is transferable between spouses; value above the cap attracts 50% relief (an effective 20% IHT rate). If a cross-option agreement is drafted as a mutual obligation rather than mutual options, it risks disqualifying the shares from BR — potentially creating a large IHT liability for the estate that the life assurance was supposed to offset.
By preserving the structure as options (rights, not obligations), the shares are not subject to a binding contract for sale, and BR qualification is preserved. This distinction is not drafting pedantry — it is the difference between a nil IHT charge on the shares and a 40% charge.
Buy-Sell Agreements: The US-Influenced Structure
In North American corporate practice (and increasingly used in international businesses with US stakeholders or US-trained advisers), the equivalent mechanism is called a buy-sell agreement. The structure is broadly similar but there are variants:
Cross-purchase agreement — each owner personally takes out a life policy on the other owners, and on death the surviving owners use the policy proceeds to buy the deceased's interest directly. Works well for two or three owners; becomes unwieldy with more (a four-owner business would require 12 policies).
Entity purchase (redemption) agreement — the company takes out policies on all owners, and on death the company redeems the deceased's shares using the policy proceeds. Simpler to administer for larger ownership groups. US tax treatment of entity redemption vs. cross-purchase differs significantly from UK treatment.
Wait-and-see buy-sell — a hybrid that preserves flexibility to choose the optimal structure at the time of the triggering event.
For UK-based or internationally structured businesses, the cross-option agreement (typically paired with a company-owned life policy on the shareholder's life) is the most common and tax-efficient UK structure. International businesses should take advice in each relevant jurisdiction, as the optimal structure depends on local company law, tax rules, and insurable interest requirements.
How Life Assurance Funds the Agreement
A cross-option agreement is merely a legal mechanism — it does not itself provide the money to pay for the shares. The cash to fund the purchase comes from life assurance (and, where included, critical illness cover).
The typical funding structure in the UK:
- Each shareholder takes out a life policy on their own life, or the company takes out policies on each shareholder's life.
- Each policy is written into trust — typically a business trust or a discretionary trust — for the benefit of the surviving shareholders (or the company, depending on the structure).
- On death, the policy pays into the trust. The trustees (the surviving shareholders, typically) then use the proceeds to exercise the call option and purchase the deceased's shares from the estate.
Why trust placement matters: if the policy proceeds were paid directly to the surviving shareholder's own estate or directly to the company, the tax treatment would be different. Writing the policy in trust ensures the proceeds are available to the surviving shareholders without forming part of any individual's estate for IHT purposes, and without triggering corporation tax in the hands of the company.
Valuation Methodology: Avoiding the "Frozen Valuation" Problem
One of the most common failures in shareholder protection arrangements is that the sum assured fixed at outset rapidly becomes out of step with the actual value of the business. A company worth £2 million when the arrangement was set up may be worth £6 million five years later — but the policy sum assured and the option agreement price may still reference £2 million.
Options for managing valuation:
Fixed sum assured with annual review clause — the policy wording includes a guaranteed insurability option or indexation clause allowing the sum assured to be increased without further medical underwriting. The cross-option agreement should require an annual valuation review.
Formula-based valuation — the agreement specifies a valuation formula (e.g., a multiple of average EBITDA over the three preceding years, or net asset value adjusted for goodwill) rather than a fixed price. The sum assured is then reviewed periodically to ensure it could fund a purchase at that formula price.
Independent valuation at the date of trigger — some agreements defer to an independent valuer appointed at the date of death or critical illness. This avoids a frozen valuation but creates uncertainty about the required funding amount.
For international businesses where revenue is in multiple currencies, the valuation formula should address currency denomination — using the functional currency of the group to avoid FX distortion.
Critical Illness Provisions
Many shareholders are concerned not only about death but about the possibility of a fellow shareholder suffering a serious illness that prevents active management participation for an extended period. Cross-option agreements can include a critical illness trigger — giving the ill shareholder the right to sell (put option) and the healthy shareholders the right to buy (call option) on diagnosis of a listed condition.
The critical illness trigger in the cross-option agreement must be precisely aligned with the trigger in the life policy's critical illness cover — using the same definition of condition and the same survival period. A mismatch between the agreement and the policy creates a scenario where one is triggered but the other is not.
International Business Owners: Additional Complexities
Shareholders in Different Jurisdictions
Where shareholders are resident in different countries — a UAE-based founder and a UK-based co-shareholder, for example — the cross-option agreement must be governed by a clearly specified law (usually the law of the company's jurisdiction of incorporation) and each shareholder's tax adviser must consider the impact of the arrangement on them personally. The UK shareholder may face IHT considerations; the UAE shareholder's estate may be subject to UAE inheritance law.
Sharia and UAE Succession Law
In the UAE, Federal Law No. 28 of 2005 (the Personal Status Law) and applicable inheritance principles (including Sharia for Muslim shareholders) govern succession. A cross-option agreement executed under English law may not override UAE succession rights without careful structuring. Internationally mobile business owners with shareholders subject to different succession regimes should take specialist legal advice.
Offshore Holding Companies
Where the business is held through a BVI, Cayman, or Isle of Man holding company, the company law of the relevant offshore jurisdiction governs shares in that entity. Cross-option agreements and the companies' articles of association must be consistent under the applicable offshore company law, and the life policies funding the arrangement must be assessed for suitability in the offshore context.
Deed Drafting Essentials
A properly drafted cross-option agreement should address:
- Triggering events — death, permanent total disability, critical illness (with defined conditions and survival period)
- Option periods — the window within which the put and call options can be exercised (typically three to six months from the triggering event)
- Valuation mechanism — how the price per share is determined
- Funding confirmation — cross-reference to the life assurance policies funding the arrangement
- Replacement policy obligations — what happens if a policy lapses, is cancelled, or becomes insufficient
- Exit and new shareholder provisions — what happens if a shareholder sells their stake voluntarily? Does the new shareholder become party to the cross-option agreement?
- Deadlock and dispute resolution — how valuation disputes are resolved if the parties cannot agree
The agreement should be reviewed whenever there is a material change in the business — a new shareholder, a change in valuation, a major acquisition, or a change in any party's residency or tax status.
Common Mistakes to Avoid
- Binding obligation language — drafting the agreement as a mutual obligation rather than mutual options, risking the loss of Business Relief.
- Mismatched sums assured — policies not keeping pace with business growth, leaving surviving shareholders unable to fund the purchase.
- Policies not in trust — proceeds paid to the wrong entity, creating tax complications.
- Critical illness definitions not aligned — the agreement triggers on a condition the policy does not cover, or vice versa.
- Valuation not updated — the agreement references an outdated valuation basis.
- No international law review — the agreement is governed by one jurisdiction's law but shareholders are subject to different succession regimes.
How Global Investments Can Help
Cross-option agreements and shareholder protection are core planning tools for business owners, but they frequently contain gaps — particularly for internationally mobile shareholders or businesses with cross-border structures.
Global Investments works with business owners, their solicitors, and accountants to ensure that the legal agreement and the insurance funding are correctly aligned, that the life policies are appropriately sized and kept in trust, and that the arrangement is reviewed at regular intervals to remain fit for purpose.
We advise clients across the UK, Cyprus, UAE, and other jurisdictions where Global Investments operates, and can coordinate with local legal and tax advisers to address jurisdiction-specific succession and tax issues.
Contact Global Investments to arrange a review of your existing arrangements, or to establish shareholder protection for the first time.
Business Relief qualification and IHT treatment depend on individual circumstances. The law may change. This guide is for information only and does not constitute legal, tax, or regulated financial advice.
This guide is for general information only and does not constitute financial or insurance advice. Policy terms, premium rates, and insurer eligibility criteria change — always verify current terms with a qualified independent adviser before taking out any policy.