Prenuptial Agreement Cost Calculator
Prenuptial Agreement Cost Estimate
Your Solicitor Fee-
Partner's Solicitor Fee-
Financial Disclosure Cost-
Additional Specialist Fees-
Recommended Timeline-
Total Estimated Cost-
Prenuptial Agreement Costs by Complexity 2025/26
| Complexity | Your Solicitor | Partner's Solicitor | Total Range |
|---|---|---|---|
| Simple | £1,000–£2,000 | £600–£1,200 | £1,600–£3,200 |
| Moderate | £2,000–£4,000 | £1,200–£2,400 | £3,200–£6,400 |
| Complex | £5,000–£10,000 | £3,000–£6,000 | £8,000–£16,000 |
| High Net Worth | £10,000–£25,000 | £6,000–£15,000 | £16,000–£40,000 |
Prenup Key Requirements
Minimum Lead Time
21 days
Both Need Solicitors
Yes
Full Disclosure
Required
Legally Binding?
Persuasive
Review Period
3–5 years
Avg Duration
4–8 weeks
How to Use This Calculator
1
Assess complexity
Determine the complexity of your situation based on assets, business interests, and international elements.
2
Enter combined wealth
Include all pre-marriage assets: property, savings, investments, business valuations, and expected inheritances.
3
Note business interests
Business ownership significantly increases complexity and cost, as valuations may be needed.
4
Check international elements
Overseas assets or dual nationality may require additional legal advice in other jurisdictions.
5
Review cost estimate
The total includes both parties' solicitor fees, financial disclosure costs, and any specialist valuations.
Frequently Asked Questions
Are prenuptial agreements legally binding in the UK?
Prenuptial agreements are not automatically legally binding in England and Wales, but since the landmark Supreme Court case Radmacher v Granatino (2010), courts give them decisive weight provided: both parties received independent legal advice, there was full financial disclosure, the agreement was entered into freely without duress, and it was signed at least 21 days before the wedding. In practice, a properly drafted prenup is highly persuasive.
How much does a prenup cost in the UK?
A simple prenuptial agreement costs £1,500–£3,000 for both parties' solicitor fees. Moderate complexity (property, investments) runs £3,000–£6,000. Complex cases involving businesses, trusts, or international assets can cost £8,000–£40,000+. Both parties must have independent legal advice for the prenup to carry weight in court, so you cannot use the same solicitor.
When should you get a prenup?
Ideally, the prenup process should begin 3–6 months before the wedding and be signed at least 21 days before. Starting too late creates a risk that the court views the agreement as having been entered into under pressure. Both parties need time for full financial disclosure, independent legal advice, and considered reflection.
What does a prenup cover?
A prenup can cover: division of property and assets on divorce, protection of pre-marital assets, business interests, inheritance expectations, debts, and spousal maintenance. It cannot override the court's duty to ensure fair provision for children. Common scenarios include protecting a family business, ring-fencing inherited wealth, or clarifying expectations where there is a significant wealth disparity.
Can a prenup be challenged?
Yes, a prenup can be challenged in court if: one party did not receive independent legal advice, there was incomplete financial disclosure, it was signed under duress or undue pressure, it was signed too close to the wedding, or circumstances have changed so significantly that upholding it would cause serious injustice (e.g., the birth of children, serious illness).
Official Sources & References
Data verified against official UK government sources. Last checked April 2026.