How Much Does a Prenup Cost? Fees, DIY Pricing, and What Drives It

Yes, a prenup almost always costs money—but the range is wide. A simple, lawyer-drafted prenuptial agreement commonly runs about $1,500 to $3,500 per person in attorney fees. More complex situations (a business, significant property, or hard negotiation) often land in the $5,000–$10,000+ range per person. Pure do-it-yourself options—online templates and software—can cost $0 to a few hundred dollars, but they carry real risk if the agreement is later challenged. Below we break down where the money actually goes, when cheaper is fine, and when paying for a lawyer protects you.

The short answer: do you have to pay for a prenup?

You do not have to hire a lawyer to create a prenup, and free templates are widely available online—so it is technically possible to spend almost nothing. But “free” and “enforceable” are different things. A prenuptial agreement is a contract that a court may have to interpret years later, often under stress, and the rules that decide whether it holds up are state law. That is why most couples who want the agreement to actually work pay for at least some professional help.

Think of the cost less as a fee for paperwork and more as buying enforceability and clarity. A document that a judge throws out cost you nothing to write and everything when you needed it.

Typical price ranges

Full-service attorney drafting

This is the most common path for couples with real assets. Expect roughly $1,500–$3,500 per person for a straightforward agreement, and $5,000–$10,000 or more per person when there is a business, real estate, significant debt, blended-family planning, or back-and-forth negotiation. Note the phrase per person: because each spouse should ideally have their own independent lawyer (more on why below), a couple may pay two sets of fees.

Flat-fee packages

Many family-law attorneys offer a flat fee for a standard prenup—often $1,000–$2,500—instead of billing hourly. Flat fees give you predictability and are a good fit when finances are relatively simple. Ask exactly what the flat fee includes: number of revisions, a review call, and whether negotiation with the other spouse's attorney is extra.

Hourly billing

Attorneys who bill hourly typically charge $250–$500+ per hour depending on the market and experience. Hourly tends to be used when the situation is complex or contested. The risk is an open-ended bill, so ask for a written estimate and a not-to-exceed cap if you can get one.

Online services and software

Template and “guided” online prenup tools generally run from free to about $200–$700. Some pair the document with an optional attorney review for an added fee. These can be reasonable for young couples with simple finances and no children from prior relationships—but a generic template will not know your state's specific requirements.

Pure DIY

Writing your own from a free form is the cheapest option and the riskiest. You may save a few hundred dollars now and discover later that a missed signing formality or a one-sided term gave a court a reason to set the agreement aside.

What drives the price up

• Complexity of assets. A business, multiple properties, stock options, retirement accounts, or significant debt all add drafting time.
• Financial disclosure. A solid prenup is built on each spouse honestly disclosing assets and debts. Gathering, organizing, and attaching that disclosure takes work—but skipping it is dangerous, as explained below.
• Negotiation. If the two sides trade revisions, each round costs time. The more contested the terms, the higher the bill.
• Two attorneys. Independent counsel for each spouse roughly doubles legal fees, but it strengthens the agreement.
• Your location. Rates in major metro areas run well above rural and lower-cost regions.
• Timing. Rushing a prenup in the final days before a wedding can mean rush fees—and a last-minute agreement is also easier to attack later as not truly voluntary.

Why the cheapest option can backfire

Whether a prenup is enforceable is decided under state law, and the standards vary. Many states have adopted a version of the Uniform Premarital Agreement Act (UPAA), but not all, and the details differ—so there is no single nationwide rulebook. A few themes show up repeatedly, though, and they explain why corners cut to save money are so costly:

• Voluntariness. An agreement signed under pressure—or sprung on a spouse right before the wedding—invites a challenge that it was not entered freely.
• Disclosure. Hiding assets undermines the deal. Under the UPAA framework, inadequate financial disclosure is not a standalone reason to void a prenup; it is considered as part of an unconscionability challenge. Importantly, a spouse can sign a voluntary, express, written waiver of further disclosure, and that waiver generally defeats a later disclosure-based attack. Getting this language right is exactly the kind of thing a lawyer is for.
• Fairness and formalities. Grossly one-sided terms and missed signing requirements give courts reasons to refuse enforcement.

A template cannot tailor any of this to your state. That is the practical case for spending something rather than nothing: the marginal cost of getting it right is small next to the cost of an unenforceable agreement.

How to keep costs reasonable

• Do the prep yourself. Arrive with a clear, organized list of your assets, debts, income, and what you want the agreement to do. Lawyers bill for time, and you can shrink it.
• Ask for a flat fee. For simple finances, a flat-fee package is predictable and often cheaper than open-ended hourly billing.
• Agree on the big terms first. If you and your partner align on the main points before lawyers get involved, you cut down expensive negotiation rounds.
• Start early. Beginning months before the wedding avoids rush fees and strengthens the voluntariness of the agreement.
• Consider scope. A short, clean agreement for two people with simple finances costs far less than a comprehensive one—match the document to your actual situation.

What you can do

1. Take inventory. Write down everything you own and owe, plus income. This is the foundation of both the agreement and the cost estimate.
2. Decide your goals. Are you protecting a business, separating debts, clarifying property, or planning for children from a prior relationship? Your goals drive complexity—and price.
3. Get a quote. Contact a family-law attorney in your state and ask directly: flat fee or hourly, what's included, how many revisions, and whether they'll provide a written estimate. Comparing two or three quotes is normal and smart.
4. Budget for two lawyers. Plan for each spouse to have independent counsel; it costs more but makes the agreement far harder to challenge.
5. Build in time. Start well before the wedding so you are never signing under deadline pressure.
6. Check your state's rules. Enforceability standards differ by state—our per-state pages cover the specifics where you live.

Is a prenup worth the cost?

For many couples, yes. The fee is one-time and predictable; the alternative—litigating asset division during a divorce without an agreement—can cost many times more in legal fees, time, and stress. A prenup can also simply create clarity and reduce conflict, which has value even if you never divorce. The right question is not “what is the cheapest way to get a document,” but “what will it cost me later if this document does not hold up.”

Time-sensitive note: Do not wait until the final days before the wedding. A rushed, last-minute prenup is both more expensive (rush fees) and easier to challenge as involuntary. Give yourself at least a couple of months.

This article is general information, not legal advice; consult a licensed attorney in your state about your specific situation.