Prenuptial Agreement Cost Calculator
Estimate the cost of a prenuptial agreement, known in Australia as a binding financial agreement (BFA). Both parties must get independent legal advice for it to be valid, so there are two sets of legal fees.
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For a BFA to be binding, each party must receive independent legal advice from their own lawyer, so there are genuinely two sets of fees. An agreement where one party was not independently advised can be set aside.
A prenup in Australia is a binding financial agreement, and it is only valid if both parties get independent legal advice, so budget for two lawyers. It must be properly drafted and fully disclosed, or a court can set it aside.
💰 Ways to save
- Agree the key terms between yourselves first, lawyers then draft and advise, reducing negotiation time.
- Full, honest financial disclosure up front avoids costly disputes and strengthens the agreement.
- A simple, clear financial situation is far cheaper to document than complex business and trust assets.
How we estimate this
A prenuptial agreement (binding financial agreement) in Australia typically costs around $2,500 to $5,000 in 2026 for a standard agreement with both parties' independent legal advice, rising to $9,000 to $15,000 for complex situations involving businesses, trusts or high-value assets.
Pricing reviewed: November 2026.
Understanding prenuptial agreement costs in Australia
A prenuptial agreement (binding financial agreement) in Australia typically costs around $2,500 to $5,000 in 2026 for a standard agreement with both parties' independent legal advice, rising to $9,000 to $15,000 for complex situations involving businesses, trusts or high-value assets.
Because each party must receive independent legal advice for the agreement to be binding, there are two sets of legal fees. Complexity, negotiation and the need for financial disclosure and valuations drive the cost up.
Frequently asked questions
How much does a prenuptial agreement cost in Australia?
Roughly $2,500 to $5,000 in 2026 for a standard binding financial agreement with both parties advised, and $9,000 to $15,000 for complex situations with businesses or trusts.
Why does a prenup need two lawyers?
For a binding financial agreement to be valid in Australia, each party must receive independent legal advice from their own lawyer. An agreement where one party was not independently advised can be set aside by a court.
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