What a prenup actually costs
The question most engaged couples ask is “how much does a prenup cost?” The honest range is wide: $1,800-$25,000 per side, depending on asset complexity, state, and whether the document will survive a future divorce challenge. The low end gets you a straightforward document that covers asset separation for a couple with modest pre-marital property. The high end buys you a fortress of contractual protection for business interests, trusts, expected inheritances, and multi-million-dollar estates.
Here’s the critical point most couples miss: a prenup is priced like an insurance premium, not a product. You’re buying enforceability against a future divorce attorney who will spend weeks looking for any flaw to void the agreement. Pay $2,000 for a quick-drafted prenup and you often pay $200,000 later in contested divorce. The calculus for high-asset couples is not “can I afford to pay for a good prenup” — it’s “can I afford not to.”
A concrete example. A couple in NYC with combined net worth of $2.8M and one spouse owning a small business. Simple prenup: $3,500/side attorney fee, $500 in notary and recording. Total: $7,500. Comprehensive prenup with full financial disclosure, business valuation, trust coordination, state-specific enforcement review: $18,000-$25,000/side. Total: $36,000-$50,000. The difference in a contested divorce 12 years later: the comprehensive prenup holds; the simple prenup is challenged and potentially thrown out, triggering $300K+ in litigation.
The four drivers of prenup cost
1. Asset complexity. Base cost scales with what’s being protected. A couple with $200K combined (savings + retirement) needs minimal documentation. A couple with business interests, trusts, real estate across multiple states, inheritance expectations, and IP ownership needs extensive valuation work and careful drafting.
2. Your state. Prenup enforcement varies dramatically by state. California requires strict procedural requirements (7-day waiting period, independent counsel, full disclosure) — getting these right requires state-specialized attorneys. New York is procedurally less strict but has quirks around alimony waivers. Florida has UPAA (Uniform Prenuptial Agreement Act) that simplifies drafting. Check whether your state is UPAA or has unique rules.
3. Business interests. Business valuation, buy-sell agreements, and future appreciation clauses add substantial legal work. Business owners should always budget $2,500-$8,000 additional for proper business-related provisions.
4. How contentious negotiation becomes. If drafting proceeds smoothly and both parties agree quickly, cost stays in the base range. If one party resists or attorneys trade drafts for weeks, cost escalates quickly. Good attorneys budget for 2-3 rounds of negotiation; anything beyond that adds billable hours.
Why both sides need independent counsel
The single most common prenup mistake is using one attorney to represent both parties. Courts routinely void prenups where both spouses used the same attorney because it creates conflict-of-interest issues — a single attorney cannot represent both sides in a negotiated contract where interests inherently conflict.
Protocol: the “moneyed” spouse’s attorney drafts the initial document. The other spouse retains separate counsel who reviews, negotiates changes, and confirms signature. Both attorneys document that their clients understood the agreement and signed voluntarily.
Cost implication: the wealthier spouse typically pays for both attorneys to ensure both have real representation. This is good policy anyway — a prenup where one side had no counsel is a challenge magnet in divorce. Paying $8K for her attorney when you’re worth $5M is cheap insurance.
The DIY template trap
Online prenup templates range from $39 (generic forms) to $800 (LegalZoom premium). They look official. They appear to cover the same topics as attorney-drafted documents. And they fail in court at rates that should terrify anyone relying on them.
Common failure modes:
Inadequate disclosure. Prenups require both parties to fully disclose assets. Generic templates don’t prompt the detailed disclosure courts require. Prenup void when undisclosed assets surface later.
State law conflicts. Templates are one-size-fits-all. Your state may require specific waivers, mandatory provisions, or formatting. Template misses them. Prenup unenforceable.
Unconscionable provisions. Templates include aggressive asset-separation language that courts consider unconscionable (unfairly one-sided). Attorneys calibrate provisions for enforceability; templates don’t.
Missing alimony waivers. Waiving alimony requires specific language and procedures in most states. Templates botch this regularly.
No independent counsel attestation. Courts weight heavily whether both parties had independent legal advice. Template filling this in as “both parties read the document” is insufficient.
Use templates for thinking exercises about what you want to protect. Don’t use them as the final document. The $4,000-$10,000 you save can cost $200K+ in contested divorce.
When a prenup is strongly worth the cost
You have significant pre-marital assets (over $250K). Without a prenup, commingling over the course of marriage converts pre-marital separate property to marital property in most states. A prenup preserves the separate character.
You own or co-own a business. Without prenup, ownership stake in your business may become marital property to the extent of appreciation during marriage. Divorce can force buyout, partner disruption, or forced sale.
One spouse has substantially more wealth. Without prenup, asset division starts from 50/50 (community property states) or equitable division considering many factors. Prenup establishes different division rules agreed-upon in advance.
You’re marrying later (late 30s+) with established assets. Two professionals with substantial careers and savings bring significant separate wealth to marriage. Prenup preserves each career’s accumulated assets.
You have children from prior relationships. Prenup protects inheritance for existing children from being redirected to new spouse in divorce or death.
You expect significant inheritance. Inheritance received during marriage can become marital property depending on state and how it’s managed. Prenup clarifies inheritance remains separate.
Related calculators
- Divorce cost — what prenup could save you.
- Attorney fees — billing structures.
- Estate planning — often bundled.
- Alimony — what prenup may waive.