How Much Does a Prenup Cost? A 2026 Price Breakdown

What a Prenup Actually Costs in 2026

A prenup typically costs $4,000 to $20,000+ all-in for a couple in 2026, because that figure covers two independent attorneys working on the agreement, not one. The couple total is the number that matters here. Each partner works with their own lawyer so the agreement holds up, which means the price you should plan around is roughly double a single engagement.

Neptune's flat fee is $5,000, and that covers both partners and both attorneys, each with 20+ years of experience. That puts Neptune at the low end of the traditional couple-total range while giving you senior attorneys instead of junior associates learning on your file.

A prenup isn't a defensive maneuver. It's a planning conversation two people have together about how they want to handle money in their partnership, what stays separate, what's shared, and how they'll approach big financial decisions down the road. The clearer that conversation, the smoother (and cheaper) the legal work that follows.

Why a Prenup Requires Two Attorneys and What That Means for Price

Each partner works with their own independent attorney. That's the single biggest reason the couple total lands roughly at double a one-lawyer engagement.

Courts strongly favor independent counsel for both partners, and some states go further. In California, a waiver of spousal support generally isn't enforceable unless the party giving it up was represented by their own independent legal counsel. Using a single attorney to represent both people is one of the more common reasons courts later set a prenup aside, because one lawyer can't fairly advocate for two people whose interests may diverge during negotiation.

Reframe that two-attorney structure the way it actually functions: each of you has your own advisor making sure the terms are fair and clearly understood before you sign. You're not squaring off. You're each getting your own read on the same shared plan. The American Bar Association treats independent representation as standard practice in family law precisely because it produces agreements that are clearer and more durable.

What Drives the Cost of a Prenup

Four things move the price: how the attorneys bill, how complex your finances are, where you live, and how much your terms get negotiated.

Billing method. Most family law attorneys charge hourly, and rates run $250 to $1,000+ per hour depending on the market and the attorney's seniority. Because a prenup usually goes through multiple drafts and revision rounds, an hourly tab is genuinely hard to predict. A flat fee removes that uncertainty.

Financial complexity. Business ownership, multiple real estate holdings, startup equity, trusts, investment portfolios, and prior marriages all require more detailed terms and more attorney time. A business, for example, brings valuation questions and specific drafting that a straightforward "what's mine stays mine" agreement never touches.

Location. Major metros like New York and San Francisco cost significantly more than smaller cities, driven by higher legal fees and cost of living.

Negotiation time. Most of the billable hours that turn into large invoices come from partners disagreeing on terms and going back and forth through their attorneys. Aligning on expectations early is the most effective way to keep the number down. The conversation before lawyers get involved is often where the real savings live.

Prenup Cost by Approach and Complexity

Here's how the main approaches compare on couple-total cost and who each fits best.

And here's how cost generally scales with financial complexity, expressed as a couple total:

Neptune's $5,000 flat rate covers both partners and both attorneys, and the state-by-state pricing stays uniform regardless of where you live. For most standard couples, that lands right in the middle of the simple-to-moderate band while giving you senior attorneys. For genuinely ultra-high-net-worth situations, a specialized traditional firm may be worth the additional cost.

How Location Changes What You Pay

Where you live can swing the price more than almost any other single factor. The same standard prenup that costs $5,000 flat can run $20,000 to $50,000+ couple total with boutique matrimonial firms in Manhattan, and high-net-worth negotiations in those markets can go materially higher.

New York and Los Angeles sit at the top end. Boston is less expensive but still runs well above a flat $5,000. Smaller cities and rural markets tend to be lower across the board, since attorney rates track local cost of living.

Neptune's pricing is flat and identical across every state where it operates, currently New York, California, and Massachusetts. A couple in Manhattan pays the same $5,000 as a couple in a smaller market. That uniformity is the whole point: your price doesn't depend on your zip code.

How to Keep Prenup Costs Predictable

If you want a number you can actually plan around, a few choices make the difference.

Choose flat-fee representation over hourly. Hourly billing means every consultation, draft, and round of revisions adds to the tab, and prenups almost always take several rounds. A flat fee caps that uncertainty from the start.

Organize and disclose your assets in advance. Detailed asset lists, property appraisals, and recent tax returns cut down the billable time attorneys otherwise spend chasing information. Full, early disclosure also strengthens the agreement.

Have the real conversation first. Because the most expensive bills come from partners disagreeing through their lawyers, aligning on expectations before attorneys get involved is the highest-leverage cost decision you can make. Decide together what stays separate, what's shared, and how you'll handle future income and assets.

This is where Neptune's model fits. Neptune manages the full end-to-end process, pairing you with guided education to align as a couple first, then connecting you with experienced attorneys (20+ years each) for a $5,000 flat fee covering both partners. You get clear milestones instead of open-ended invoices, and the price you're quoted is the price you pay.