High Net Worth Prenuptial Agreement Solicitors

Fixed fee prenups for assets over £3 million

Our high net worth prenuptial agreement service costs a fixed £1,800 + VAT for couples whose combined assets exceed £3 million. We draft and advise on prenups that protect shareholdings, businesses, property portfolios, trusts and family wealth, so you know where you stand before you marry.

Why a standard prenup is not enough when assets exceed £3 million

A straightforward prenup can deal with a house and some savings in a few pages. Once you hold shares in a private company, a stake in a family business, a property portfolio, investments held through a trust or overseas assets, the agreement has to do a lot more work.

It needs to say exactly which assets are protected, how growth in their value will be treated, what happens if business income is reinvested or assets become mixed with family money, and how the agreement still meets both of your needs if circumstances change. A vague clause about “separate property” is exactly the kind of wording that gets argued over later.

What is included in the fee

• Initial consultation to understand your assets, structures and objectives
• Advice on how a court in England and Wales is likely to treat your agreement
• Guidance on the financial disclosure you will need to exchange
• Drafting a bespoke prenuptial agreement tailored to your assets
• Reviewing your partner’s disclosure and their solicitor’s comments
• Up to two rounds of revisions to the agreement
• Finalising the agreement ready for signing

What is not included

• Business, share or company valuations
• Property or portfolio valuations
• Forensic accountant reports
• Pension actuarial reports
• Tax advice from accountants or tax specialists
• Advice from lawyers in other countries on overseas assets
• Your partner’s legal fees (they must have their own independent solicitor)

If an outside expert is needed, we will explain why, help you instruct them and agree the cost with you before any work starts. Many agreements can rely on recent accounts, statements and agreed figures without a formal valuation.

Are prenuptial agreements legally binding in England and Wales?

Not automatically, but a properly prepared prenup carries very significant weight. Since the Supreme Court decision in Radmacher v Granatino (2010), courts will uphold a prenup that both people entered into freely, with a full understanding of what it meant, unless it would be unfair to hold them to it. In practice, unfairness usually means the agreement leaves one person, or the children, without their reasonable needs being met.

In June 2026 the Ministry of Justice consulted on proposals, called “A fairer end to relationships”, that would introduce legally binding “qualifying nuptial agreements”. The consultation closed on 14 August 2026. These are proposals, not law. Until any change is made, the current case law applies, and the steps that make a prenup hold up today are the same ones the proposals build on.

What makes a high value prenup more likely to be upheld

• Full and frank financial disclosure by both of you, including business interests, share structures and trust interests
• Independent legal advice for each person, from separate solicitors
• Good timing, signed at least 28 days before the wedding and ideally well before invitations go out
• No pressure, so neither person feels they had no real choice
• Fair provision for needs, so the agreement does not leave either person in real financial hardship
• Review clauses for events such as having children or a major change in wealth

Protecting the assets that matter most

Shares in a private company

We draft clauses that ring-fence your shareholding, deal with dividends and retained profits, and reflect any shareholder agreement, articles or pre-emption rights. Where co-founders or investors are involved, the prenup can be written to avoid any future claim disrupting the company.

Family and owner-managed businesses

If a business has been built or inherited before the marriage, the agreement can record that it is non-matrimonial property and set out how any growth during the marriage will be treated. This is often the most important clause in the whole document.

Share options, RSUs and carried interest

Unvested and deferred rewards are easy to overlook. We identify them, record them in disclosure and agree how they will be treated, whether they vest before, during or after the marriage.

Property portfolios

Buy-to-let portfolios, commercial property and property held through companies can be protected, along with the rental income and any refinancing or reinvestment during the marriage.

Trusts and inherited wealth

Family trusts, expected inheritances and gifted wealth can be identified and protected. We can also work alongside the trustees’ or family’s advisers where needed.

Overseas assets and international couples

If either of you holds assets abroad or may live overseas, we will flag where advice from a local lawyer is needed so the agreement is as robust as possible in more than one country. That foreign advice is charged separately.

Pensions and investment portfolios

Pensions and investment portfolios built up before the marriage can be identified and ring-fenced, and the agreement can set out how future contributions will be treated.

How the process works

1. Consultation. We talk through your assets, ownership structures and what you want the agreement to achieve.
2. Disclosure. You and your partner each prepare a schedule of assets, income and liabilities with supporting documents. We tell you exactly what is needed.
3. Drafting. We prepare a bespoke agreement and explain each clause to you in plain English.
4. Revisions. Your partner’s solicitor reviews the draft and we deal with their comments, with up to two rounds of revisions included.
5. Signing. The final agreement is signed by you both, at least 28 days before the wedding.

Our typical turnaround is around 28 days. Because the agreement should be signed at least 28 days before the wedding, we recommend contacting us at least two months before your wedding date, and earlier if any assets need an outside valuation.

Frequently asked questions

How much does a high net worth prenup cost?

Our fixed fee is £1,800 + VAT (£2,160 including VAT) where assets exceed £3 million, including up to two rounds of revisions. It does not include valuations, forensic accountants, tax advice, overseas legal advice or your partner’s own solicitor.

Do we need to get our business or shares valued?

Not always. Many agreements rely on recent company accounts, share registers and an agreed or estimated figure. A formal valuation may be sensible where a business is a large part of the wealth, the value is genuinely uncertain or your partner’s solicitor asks for one. Valuation fees are paid separately to the valuer.

Can a prenup protect the future growth of my business?

Yes. The agreement can say how any increase in value during the marriage will be treated, for example that it stays with the owner, or that a set share is paid to the other spouse. Clear drafting on growth is one of the most valuable things a high net worth prenup can do.

How much detail do we need to disclose?

Enough for each of you to understand what the other owns and earns. For high value assets this usually means company accounts, shareholdings, property schedules, investment and pension statements, and details of any trust interests. Incomplete disclosure is one of the main reasons agreements are challenged, so it is worth getting right.

Can my partner and I use the same solicitor?

No. Each of you needs independent legal advice from a separate solicitor. This is one of the key safeguards a court will look for. Your partner’s legal fees are not included in our fee.

Will a court always follow our prenup?

A court keeps the final say, but it will usually uphold an agreement that was freely entered into, based on proper disclosure and advice, and that still meets both people’s reasonable needs. The more carefully it is prepared, the more weight it is likely to carry.

What happens to the prenup if we have children?

A court will always make sure children’s needs are met, whatever the agreement says. We usually include a review clause so the agreement is revisited when you have children, keeping it fair and more likely to be upheld.

Can a prenup protect an inheritance I have not yet received?

Yes. Expected inheritances and interests under family trusts can be recorded and protected as non-matrimonial property, provided they are properly disclosed.

What if assets get mixed during the marriage?

Mixing, such as using inherited money towards the family home, can weaken protection over time. A good prenup sets out how mixed assets will be treated so the position is clear from the start.

We already have a prenup. Should it be updated?

If your wealth has grown significantly, you have restructured a business or you have had children, the agreement may no longer reflect your circumstances. Updating it, or putting a postnuptial agreement in place, helps keep it fair and relevant.

Is the law about to change?

The government consulted in 2026 on making “qualifying nuptial agreements” legally binding. No new law is in force yet. A prenup prepared properly now, with full disclosure, independent advice and fair provision for needs, is in the strongest position under today’s law and is likely to sit well with any future reform.

Do you cover Scotland and Northern Ireland?

No. This service covers England and Wales only. Scotland and Northern Ireland have their own rules on marital agreements.

How long does it take?

Typically around 28 days. The agreement should be signed at least 28 days before your wedding, so contact us at least two months before the wedding date.

Protect your assets before you marry

Fixed fee of £1,800 + VAT for prenuptial agreements where assets exceed £3 million. Request a free callback using the form and our family law team will be in touch.