No state says every couple must have lawyers for a prenup to exist — but courts weigh heavily whether each partner had independent legal advice, and a few situations (waiving spousal support in California, big wealth gaps, businesses, kids from prior marriages) make counsel close to essential. The popular middle path: online service for drafting, attorney review before signing.
Short answer: probably not legally — but practically, yes. Most states don’t mandate an attorney for every prenup, yet whether each partner had independent legal advice is one of the first things a court examines if the agreement is challenged years later. The answer for your situation depends on your state and how complex your finances are.
Here’s the honest decision framework: when you can reasonably proceed without one, when counsel is close to essential, and what the middle path looks like.
Why states care who signed what
A prenup is a contract, and contracts only work if both sides understood them. When a divorce happens years later, the person challenging the agreement will claim they didn’t understand it, were rushed, or got a raw deal. What protects the document?
- Full financial disclosure both sides actually read
- Evidence of voluntary signing — no last-minute pressure
- Independent legal advice — each partner had someone explaining what they were giving up
Most states don’t put a gun to the “hire a lawyer” requirement — but the Uniform Premarital and Marital Agreements Act, adopted in some form by most states, lets a court refuse to enforce an agreement when a party had no access to their own attorney. “He told me it was fine” doesn’t carry much weight.
When you can reasonably go without one
If all of these describe your situation, the DIY-or-online route with a careful read is defensible:
- Finances are straightforward: accounts, a car, maybe a house with a clear paper trail
- No spousal support waiver involved
- Both partners understand the document fully and are aligned on terms
- Neither side feels pressured — and both had a genuine chance to get counsel
Even here, the cheap insurance is the same as the middle path below: have an attorney review the finished document before you sign. One hour of review beats years of doubt.
When you should have one
Counsel becomes close to essential when any of these apply:
- A large wealth or income gap. The less-moneyed partner signing without advice is the imbalance courts notice first.
- A business, real estate portfolio, or complex compensation. Ownership, valuation, and growth-during-marriage clauses are where templates quietly fail.
- Kids from a previous marriage. You’re not just dividing between two people — you’re protecting obligations to children. Get the drafting right.
- A significant inheritance is expected. One clause decides whether it stays yours.
- You’re waiving spousal support. In California this literally requires independent counsel; elsewhere it’s the provision most likely to get carved out.
- Either partner feels uncertain — or pressured. If the conversation has any friction, independent advice protects both of you and the document.
California: the strictest common example
Worth spelling out because it catches people off guard. Under California law (Cal. Fam. Code §§ 1612, 1615):
- A prenup is presumed invalid unless each party either had their own attorney or signed a written waiver saying they were advised they could get one — and did so at least 7 days before signing.
- Waiving spousal support requires independent counsel. No waiver, no support clause.
Other states are less prescriptive — but California is where “we just signed it” goes to die. Check your own state’s page: state prenup rules.
The middle path most couples take
For straightforward finances, there’s a route between “full-service law firm” and “printer and a notary”:
Online service for drafting + attorney review before signing. You answer state-specific questions, the platform generates the agreement, and a lawyer checks it. You get the flat-fee structure of software with the enforceability posture of counsel — and each partner can still take the draft to their own attorney.
That’s the balance our lawyer vs. online comparison walks through in detail, and whether online prenups are legal covers the enforceability question state by state. Budget-wise, the cost calculator gives you both paths side by side for your state.
What about the fee?
For straightforward finances, attorney-drafted prenups typically land $1,500–$4,000; complex estates run $5,000–$15,000+. Online routes start around $600–$1,500, with attorney review adding $600–$1,000. The full cost guide breaks down the line items that blow up bills — and how to avoid them.
What to do next
- Read the comparison if you’re choosing between routes: lawyer vs. online.
- Check your state — counsel rules and formalities differ: your state’s prenup page.
- Get your number before deciding a budget: the free cost calculator.
- Booked the consultation? Bring the right questions: what to ask a prenup lawyer.
And if you haven’t settled the bigger question first — whether your situation calls for a prenup at all — start there: Do you need a prenup?
Sources
- Nolo — Do you need a prenup agreement attorney?
- Zola — Is creating a do-it-yourself prenup a good idea?
- California Family Code §§ 1612 and 1615 — California Legislative Information, leginfo.legislature.ca.gov
