A prenuptial agreement drafted by attorneys typically costs between $1,000 and $10,000 for the couple combined, with a national average around $8,000 when each partner hires their own lawyer. Couples with simple finances can come in under $5,000. Couples with businesses, investment portfolios, or heated negotiations routinely pay more than $10,000, and some spend $20,000 or more once appraisers and accountants get involved. If you want a rough answer to how much a prenup costs, that’s the range; the real number depends on how complicated your finances are and how much you and your partner already agree on before lawyers start drafting.
Typical Price by Financial Complexity
Survey data from family law attorneys consistently puts the average total prenup cost at roughly $8,000 per couple when each partner retains separate counsel. That figure is the two attorneys’ fees combined, not one side.
For couples with straightforward finances — two salaries, a shared bank account, maybe a rental apartment — a combined total in the $2,500 to $5,000 range is realistic. Once business ownership, multiple real estate holdings, or trust structures enter the picture, the combined total can climb past $10,000 and occasionally reach $20,000 or more.
Those numbers are attorney fees alone. Supporting costs like valuations and appraisals get added on top, and they can be substantial.
What Drives the Price Up or Down
Complexity is the single biggest cost driver. A couple where both partners are salaried employees will spend a fraction of what a couple spends when one partner owns a business or holds equity in a startup. Documenting and valuing those assets takes time, and attorney time is what you’re paying for.
Negotiation friction is the second major factor. When both partners largely agree on terms before sitting down with lawyers, the drafting moves quickly. When disagreements arise over spousal support, property division, or how future earnings should be treated, every round of revisions adds billable hours. This is where costs spiral in ways couples don’t anticipate.
Geography and attorney experience round out the picture. Lawyers in major metro areas charge higher hourly rates than those in smaller markets. A seasoned family law specialist costs more per hour than a general practitioner, but that expertise often means fewer drafting errors and a document less likely to be challenged later.
How Attorneys Bill for Prenups
Most family law attorneys use one of two billing structures: hourly rates or flat fees.
Hourly billing means the lawyer tracks every minute spent on consultations, drafting, research, phone calls, and correspondence with the other attorney. Hourly rates for family law attorneys range from roughly $250 to over $1,000, depending on experience and location. The downside is unpredictability. A prenup that seemed simple can balloon in cost if negotiations stall or new asset disclosures complicate the drafting.
Flat-fee arrangements give you a single price for the entire process. This structure is more common for straightforward prenups where the attorney can estimate the work with reasonable accuracy. Before signing a flat-fee engagement, ask exactly what’s included. Some flat-fee quotes cover only the initial draft and a set number of revisions; additional negotiation rounds or unexpected asset disclosures may trigger extra charges.
Cheaper Alternatives and What You Give Up
Online Services and DIY Templates
The least expensive route is an online prenup platform or downloadable template. HelloPrenup, one of the more established online services, charges a flat fee of $599 per couple for the agreement itself, with optional add-ons for attorney review, e-signatures, and notarization that can bring the total closer to $1,300 to $1,900 per couple. Other platforms and downloadable templates are available for even less.
The risk: a generic template may not reflect your state’s specific enforceability requirements or adequately address your financial situation. Courts have thrown out prenups for technical deficiencies an experienced attorney would have caught. The savings evaporate if the agreement is unenforceable when you actually need it.
Mediation With a Single Attorney
Some couples hire one neutral attorney-mediator to guide them through the process together, splitting the cost of a single professional. This can reduce expenses meaningfully but carries real limits. Because the mediator cannot advocate for either side, neither partner receives independent legal advice. In jurisdictions where independent counsel is a validity requirement, mediation alone may not produce an enforceable agreement. Many couples who go this route still have each partner briefly consult their own attorney before signing, which adds cost but shores up enforceability.
The Hybrid Approach
A practical middle ground is drafting an initial agreement through an online service and then hiring an attorney to review it. Review fees from family law attorneys generally fall between $200 and $1,000 as a flat fee, depending on the document’s complexity and the attorney’s market. This hybrid model can keep total costs in the $800 to $1,600 range while catching the most common pitfalls of a DIY document. For couples with straightforward finances, the tradeoff is often worth it.
Two Attorneys, One for Each Partner
The standard approach — each partner with independent counsel — is the most legally secure path and the one most likely to produce an enforceable agreement. In most states, independent legal advice for both parties is either required or strongly favored when courts assess whether a prenup was signed voluntarily. The combined cost generally runs from $4,000 to $10,000 or more.
Hidden Costs Beyond Attorney Fees
Attorney fees are the headline number, but several supporting expenses can add meaningfully to the total bill.
- Business valuations. If either partner owns a business or holds equity in a private company, a professional valuation is usually necessary to establish the asset’s worth at the time of the agreement. These typically cost $2,000 to $5,000 or more, depending on the size and complexity of the business.
- Forensic accounting. Couples with intermingled assets, trusts, or income from multiple sources may need a forensic accountant to document the full financial picture. Expect hourly rates of $150 to $300, with total fees commonly ranging from $2,000 to $7,000.
- Real estate appraisals. When a prenup addresses property one partner owned before the marriage, a formal appraisal establishes its pre-marriage value. Residential appraisals typically run $300 to $600 per property.
- Notarization. Most states don’t require prenups to be notarized, but many attorneys recommend it as an extra layer of authentication. Notary fees are modest, usually $2 to $30 per signature, with remote online notarization on the higher end.
- Document translation. When one partner’s primary language isn’t English, a certified translation of the agreement strengthens enforceability. Professional certified translation services charge roughly $18 to $40 per page.
For a couple with a business and multiple properties, these supporting costs can add $5,000 to $15,000 on top of attorney fees. For couples without complex assets, the only extra expense might be a $10 notary fee.
Cost of Changing a Prenup Later
A prenup drafted at 28 may not fit your financial life at 45. Couples can modify or replace their agreement through a postnuptial agreement or a formal amendment. The process resembles the original drafting: both partners need independent counsel, updated financial disclosure, and a voluntary agreement to the new terms.
Modification costs tend to be lower than drafting from scratch because the foundational structure already exists. Attorney review and revision of an existing agreement generally falls in the $500 to $2,000 range for straightforward changes, though significant renegotiation can push costs back toward original-drafting territory.
Where to Spend and Where to Save
Couples who get the best value tend to do two things. They prepare thoroughly before meeting with an attorney, and they negotiate the big-picture terms privately before the lawyers get involved. Gathering your financial documents, discussing your priorities, and agreeing on the broad outlines of property division before your first consultation can cut billable hours dramatically. Your attorneys should handle legal drafting and fine-tuning, not serve as expensive mediators for conversations you could have over dinner.
Where you shouldn’t cut corners is enforceability. Independent counsel for both partners, complete financial disclosure, and adequate time before the wedding are worth the money. A $3,000 prenup that holds up in court is a bargain. A $500 prenup that gets thrown out is the most expensive document you’ll ever sign.