TL;DR: No U.S. state requires two lawyers for a prenup to be valid. But a prenup is a negotiation between two people whose financial interests are adverse, which makes joint representation a conflict of interest under the professional conduct rules, so in practice the choice is between each partner having their own lawyer or at least one partner having none. Independent counsel on both sides is the strongest enforceability protection a prenup can have, and in California a spousal-support provision is unenforceable against a partner who signed without their own attorney. First's Lawyer Review package pairs each partner with their own independent family law attorney.

Do you need two lawyers for a prenup?

Legally, most states will enforce a prenup even if one or both partners signed without counsel, provided everything else about the agreement was sound. In practice, couples who skip independent counsel hand a future challenger their best argument: that one partner did not understand what they were signing and had nobody advising them. Courts scrutinize prenups for voluntariness and fairness, and the presence or absence of independent advice is part of that inquiry. California Family Code section 1615 makes the point explicit: in deciding whether an agreement was signed voluntarily, a court asks whether the party was represented by independent legal counsel or, after being advised to seek it, expressly waived representation in a separate writing.

So the useful question is not whether two lawyers are required, but what skipping them costs. A prenup is worth making only if it holds up, and independent counsel on both sides is how couples buy that durability.

Why one shared lawyer does not work

A common assumption is that a couple can hire one lawyer to draft a prenup "for both of us." A prenup is a negotiation between two people whose financial interests diverge: what protects one partner's business is the other partner's waived claim. Under ABA Model Rule 1.7, a concurrent conflict of interest exists when the representation of one client is directly adverse to another, or when there is a significant risk that representing one client will be materially limited by the lawyer's responsibilities to another. That is a fair description of prenup negotiation.

Rule 1.7 does allow a lawyer to proceed in some conflict situations with each client's informed, written consent, where the lawyer reasonably believes they can still provide competent and diligent representation to each. But consent does not turn one lawyer into two advocates. The lawyer still cannot argue both sides of the same bargain, and the result is an agreement where at least one partner was effectively unadvised. That is the vulnerability a later challenge targets, which is why family law attorneys routinely decline to draft a prenup for a couple jointly.

Note that the Model Rules are a template. Each state adopts its own version through its bar or supreme court, so the precise wording that binds your attorney is your state's rule, not the ABA's.

What state law says

  • Most states: independent counsel is not a formal validity requirement, but courts weigh it when a prenup is challenged for voluntariness or unconscionability. An unrepresented spouse's challenge carries more credibility.
  • California: the most specific rules. Family Code section 1612(c) provides that any provision regarding spousal support, including a waiver, is unenforceable against a party who was not represented by independent counsel when the agreement was signed. Section 1615 adds that for agreements executed on or after January 1, 2020, the final draft must be delivered to both parties at least seven days before signing, which gives each partner time to use that advice. That period cannot be waived by mutual agreement. See our California prenup guide.
  • Other states: 29 states plus the District of Columbia have adopted some version of the Uniform Premarital Agreement Act or its 2012 update the UPMAA, neither of which mandates two lawyers, though both treat the opportunity to obtain independent counsel as relevant to enforceability.

For how the rules shift across the country, our state-by-state guide covers each state's formalities.

What independent counsel changes in practice

  1. Each partner's interests are represented. Separate attorneys mean neither partner is negotiating against a lawyer with no duty to them.
  2. The terms come out balanced. Two advocates negotiating tends to produce the defensible agreement courts enforce rather than the lopsided draft courts reject as unconscionable.
  3. Disclosure gets done properly. Lawyers on both sides drive complete, documented financial disclosure, closing off the most common invalidation argument.
  4. Advice is personal. State law nuances, including community property, support waivers, business interests, and trusts, get applied to your situation rather than a template's.
  5. The challenge never forms. A partner who had their own attorney cannot credibly claim they signed blind, which removes the argument behind much prenup litigation.

What two attorneys cost, and the trap of cheaper routes

Hiring two traditional family law attorneys separately typically runs thousands of dollars per partner. Our complete prenup cost breakdown has the current numbers and their sources. The tempting shortcuts are one shared lawyer, which runs into the conflict rules above, or a form document with no review at all, which saves money by removing the protection that makes the document worth having.

The Lawyer Review package is built to collapse that trade-off: $3,500 flat covers the guided drafting process plus an independent family law attorney for each partner. Two lawyers, one price. For couples with more complex finances, the Bespoke package extends the same two-attorney structure. No retainers. No hourly billing. No shared counsel.

Frequently Asked Questions

Do you need two lawyers for a prenup?

No state requires it for an ordinary prenup to be valid, but joint representation in a prenup is a conflict of interest under the professional conduct rules, so the practical choice is two independent attorneys or an unrepresented partner. Two is the structure courts trust, and in California spousal-support provisions are unenforceable against a partner who had no counsel.

Can one lawyer represent both of us?

Generally no. A prenup puts two people's financial interests directly against each other, which is a concurrent conflict under ABA Model Rule 1.7 and its state equivalents. Some conflicts can be waived with informed written consent, but a single lawyer still cannot advocate for both sides of the same negotiation, and most family law attorneys decline the engagement.

Can I get a prenup without any lawyer?

In most states, yes. A prenup signed without counsel can still be valid if it meets every other requirement, and it is also the easiest kind to challenge. See do I need a lawyer to get a prenup for when a self-serve approach makes sense and when it does not.

What kind of lawyer does prenups?

Family law attorneys handle prenuptial agreements. Look for licensure in the state where you will marry or live, prenup experience rather than divorce litigation alone, and comfort with whatever your finances involve, whether that is equity compensation, a business, or real estate. Every attorney in First's network is an independent, state-licensed family law attorney.

Does each partner need their own lawyer in California?

For the agreement as a whole, independent counsel is strongly advised and factors into whether a court finds the signature voluntary. For a spousal-support provision specifically, California Family Code section 1612(c) makes it unenforceable against a partner who was not represented by independent counsel at signing.

Two lawyers, without the two-lawyer hassle

The usual reason couples skip independent counsel is friction: finding two attorneys, coordinating four calendars, paying two retainers. First removes the friction rather than the protection. On the Lawyer Review package each partner gets their own independent family law attorney inside one flat fee, with drafting, review calls, e-signing, and online notarization handled on the platform.

Methodology

The conflict-of-interest analysis reflects ABA Model Rule 1.7, which is a model that each state adapts; your attorney is bound by their own state's version. Statutory requirements are quoted from the California Family Code sections linked above and apply in California only. General principles hold across states, but specific thresholds such as the seven-day delivery period do not. First's pricing is from First's published pricing page as of 2026.

Sources

First is not a law firm. The information and tools provided by First on this site are not legal advice and not a substitute for the advice of an attorney. Attorney services facilitated through First are provided by independent attorneys subject to an attorney-client agreement between each attorney and the customer.