This article is general information, not legal advice; prenuptial agreement enforceability is governed by state law and pricing reflects attorney-quoted ranges compiled through 2025–2026, not a single national fee schedule.
TL;DR — Quick Verdict
- A typical attorney-drafted prenuptial agreement costs roughly $1,500 to $10,000 per couple, and both parties need separate counsel, so the total is the sum of two bills, not one.
- Online template services such as HelloPrenup and LegalZoom advertise flat fees in the low hundreds, but they do not supply the independent legal review most states weigh when testing enforceability.
- Complexity, not state, drives price: a business interest, a pending inheritance, or an equity grant can triple the drafting hours.
- Compared against a contested divorce — which routinely reaches five figures per spouse — a prenup breaks even if it prevents even a modest fraction of that litigation.
- Recommendation: if either partner owns a business, holds premarital equity, carries significant debt, or has children from a prior relationship, retain separate counsel. If both are early-career with symmetrical, simple finances, the marginal value is low.
Roughly half of American marriages that end do so through divorce, yet only a small minority of couples sign anything in advance describing how their property would be divided. The gap is largely about price and awkwardness. A prenuptial agreement is one of the few legal documents where the sticker cost is small relative to the exposure it addresses — the Bureau of Labor Statistics puts lawyer median annual wages well into six figures, which is why an hour of family-law time is expensive and why the total bill scales so sharply with financial complexity.
What follows is a breakdown of what prenups actually cost across three delivery routes — full attorney representation, mediated drafting, and online template platforms including HelloPrenup and LegalZoom — plus the specific financial situations where the document earns its fee and the ones where it does not. Every range here is sourced and labeled. Where a defensible national figure does not exist, the calculation method is given so the numbers can be run against a local quote.
What a Prenuptial Agreement Actually Costs
Price is driven by attorney hours, and attorney hours are driven by how tangled the balance sheet is. A two-page agreement between two salaried professionals with no property is a different product from one that carves out a closely held S-corp, a vesting equity schedule, and a family trust remainder interest.
Below are the ranges reported across attorney directories, legal marketplaces, and firm-published fee pages compiled through 2025 and early 2026. These are secondary-source ranges, not a government fee schedule — no such schedule exists, because prenuptial agreements are private contracts and are never filed with a court.
Ranges compiled from attorney directory fee disclosures and platform published pricing, 2025–2026. Provider-specific and period-specific averages were unavailable from any primary source; prenuptial agreements are not court-filed and generate no public fee data. Platform pricing verifiable at helloprenup.com and legalzoom.com. Wage context: Bureau of Labor Statistics (verify at bls.gov).
One structural point gets missed constantly: the quote a lawyer gives is for representing one person. Most states either require or strongly favor independent representation for both parties, so budget the couple total. Anyone benchmarking these figures against dissolution costs should look at divorce lawyer hourly rates, since the same billing rates apply.
Why the Price Varies So Much: What Drives the Hours
Consider two couples marrying the same weekend.
Couple A: both 29, both salaried, combined savings of about $40,000, one car loan, no property, no dependents. Their agreement needs a disclosure schedule, a separate-property definition, a debt clause, and signature formalities. A competent family-law attorney can produce that on a flat fee, and the second attorney’s review is short. Realistic couple total: the $1,500–$5,000 band.
Couple B: one partner owns 60% of a consulting LLC generating meaningful annual revenue; the other has restricted stock vesting over four years and a child from a prior marriage. Now the drafting has to address appreciation of a premarital business interest during the marriage, whether active efforts by the owner-spouse convert appreciation into marital property, how unvested equity is characterized, and how estate provisions interact with obligations to an existing child. That is not a template problem. Each round of redline between two firms consumes billable time on both sides, and a valuation professional may be needed just to populate the disclosure schedule — the same expertise used in business valuation during divorce, at similar rates.
The multiplier is negotiation rounds. Assume a mid-market family-law rate — call it R dollars per hour, which any prospective client can get in a first call — and a simple agreement at 4–8 hours per side. Each substantive redline round adds roughly 2–4 hours per side. Three rounds of real negotiation therefore adds 12–24 hours across both firms. At any plausible R, that is where a $3,000 project becomes a $12,000 one.
Attorney-Drafted vs Online Prenup Platforms: Which Is Better?
Platform marketing frames this as a pure price comparison. It isn’t. The two products differ in what they deliver against the standard courts actually apply.
Every state has adopted some version of premarital agreement statute — most from the Uniform Premarital Agreement Act framework published by the Uniform Law Commission, with meaningful state-by-state variation in a handful of jurisdictions that impose stricter procedural requirements. Across those frameworks, challenges succeed on recurring grounds: incomplete financial disclosure, signing under time pressure close to the wedding, absence of independent counsel, and unconscionability at enforcement.
An online platform can produce clean, internally consistent contract language and a disclosure worksheet. What it cannot do is tell either party that a specific clause is unenforceable in their state, catch an omitted asset, or create the record of independent advice that defeats a later duress claim. Several platforms sell attorney review as an add-on, which narrows the gap — and also narrows the price advantage.
Verdict
Online platforms are defensible only for couples with genuinely simple, symmetrical, fully documented finances and no children from prior relationships — and only with paid independent review on both sides. Any business interest, equity compensation, real property, significant debt asymmetry, inheritance expectation, or prior-marriage obligation moves the decision to separate attorneys. The cost delta between a $600 template and a $6,000 drafted agreement is trivial against the exposure it is meant to govern.
What Most People Get Wrong About Prenups
Four mistakes account for most of the agreements that fail when tested.
Signing too close to the wedding
Mistake: presenting the document days before the ceremony. Consequence: it hands the other side a duress argument, and some states impose explicit waiting or review periods. Correct action: circulate a first draft several months out and treat the wedding date as a hard deadline that has already passed.
Incomplete financial disclosure
Mistake: rounding, omitting a dormant account, or leaving a contingent interest off the schedule. Consequence: nondisclosure is the single most common successful attack on an agreement. Correct action: attach full statements as exhibits and disclose more than feels necessary.
Trying to contract around child support
Mistake: writing terms that fix or waive child support. Consequence: courts do not enforce them, because support belongs to the child, not the parents, and is set by statutory formula — see how the child support formula operates independently of private agreement. Correct action: leave support out entirely and confine the agreement to property and spousal support.
Using one lawyer for both people
Mistake: economizing by having the drafting attorney “also” advise the other party. Consequence: an unwaivable conflict and a straightforward path to invalidation. Correct action: two lawyers, two files, two bills.
Never updating it
Mistake: signing at 28 and never revisiting after a business sale or a career change. Consequence: terms drift far from reality and start to look unconscionable at enforcement. Correct action: schedule a review every five years or after any material financial event; amendment costs a fraction of a fresh draft, roughly comparable to a custody or support order modification.
Is a Prenup Worth It? Running the Break-Even
Frame it as insurance pricing rather than as a moral question. The premium is the drafting cost. The covered loss is the marginal litigation expense a clear agreement prevents, multiplied by the probability of dissolution.
The methodology any couple can run with their own quotes: multiply a realistic contested-divorce legal cost by the share of that cost attributable to disputes over property characterization, then discount by dissolution probability. Contested proceedings routinely reach five figures per spouse, and the gap between negotiated and litigated outcomes is documented in mediation versus litigation cost comparisons and in average divorce cost by state. Property-characterization fights — whose business, whose appreciation, whose inheritance — are among the most expensive line items, because they require experts.
Assessment framework derived from state premarital agreement statutes cataloged by the Uniform Law Commission (verify at uniformlaws.org). Rankings are analytical, not statistical; no primary source publishes prenup outcome data by household profile.
Spousal support deserves separate weight. Most states permit contractual modification or waiver of spousal support in a prenup, subject to unconscionability review, and that single provision often carries more dollar value than every property clause combined — as the arithmetic of alimony amounts and duration makes clear. Retirement accounts are a partial exception: a prenup can characterize them, but dividing a qualified plan still requires a separate court order, so QDRO costs for splitting retirement accounts remain in play regardless.
How to Cut the Cost Without Gutting the Agreement
Three levers actually move the number, and none of them involve skipping counsel.
Arrive prepared. Bring a completed asset and liability schedule with supporting statements to the first meeting. Attorneys bill for assembling that; you can do it free. On a project quoted hourly, this alone routinely removes several hours per side.
Agree on the substance first. Sit down together, without lawyers, and reach rough consensus on the four questions that matter: what stays separate, how income during the marriage is treated, what happens to the house, and whether spousal support is modified. Handing counsel a term sheet converts open-ended drafting into documentation. This is the same economics that makes uncontested divorce costs a fraction of contested ones.
Ask for a flat fee and get the scope in writing. Many family-law firms quote flat fees for simple prenups but bill hourly once complexity appears. Ask directly what triggers the switch. And resist full DIY on anything non-trivial — the failure modes mirror DIY divorce risks, where a document that looks complete turns out to be unenforceable exactly when it is needed.
Frequently Asked Questions
Do both people really need their own lawyer?
Functionally, yes. Some states require independent counsel or a formal written waiver; others treat its absence as strong evidence of procedural unfairness. Because premarital agreement statutes derive largely from the Uniform Premarital Agreement Act framework published by the Uniform Law Commission, requirements vary by jurisdiction. Practically, a second attorney adds roughly $750 to $2,500 to the couple total and removes the most common ground for later invalidation.
Can a prenup cover child custody or child support?
No. Courts decide custody on a best-interests standard and set support by statutory formula, and no private contract binds them on either point. Attempting it risks tainting the document. Custody disputes are resolved separately and expensively — see typical child custody attorney fees. Confine the agreement to property division and, where permitted, spousal support.
Is a postnuptial agreement cheaper?
Not usually. Drafting cost is comparable, often $1,500 to $10,000 per couple, but postnups face tougher scrutiny in many states because spouses already owe each other fiduciary duties and the bargaining position has changed. Some jurisdictions require additional consideration. If the choice is available, signing before the wedding is both cheaper to defend and more durable.
How long before the wedding should we start?
Three to six months. Several states impose explicit review periods, and courts scrutinize agreements signed close to the ceremony for duress. A moderately complex agreement takes 4 to 12 weeks with two firms exchanging drafts. Starting late also raises cost, because rush work compresses negotiation rounds into billable crisis time.
How We Researched This Article
Cost figures in this article are presented as ranges rather than point estimates, and that choice is deliberate. No government agency, court system, or federal statistical program collects prenuptial agreement pricing. Prenups are private contracts, never filed with a court, and generate no public record — which means there is no equivalent to a court filing fee schedule or a published Medicare rate to cite. Any single national “average prenup cost” circulating online is a survey artifact or a marketing figure, not a measured statistic.
The ranges above were assembled from three source tiers. First, published pricing pages from consumer legal platforms, which disclose flat fees directly. Second, fee disclosures from family-law firms and attorney directory listings across multiple metropolitan markets, compiled through 2025 and early 2026. Third, wage and employment context from the Bureau of Labor Statistics Occupational Outlook Handbook, which grounds why legal hours cost what they do.
Legal framework claims — independent counsel expectations, disclosure requirements, the unenforceability of child support terms, and state adoption patterns — were checked against the Uniform Law Commission premarital agreement materials and against state statutory frameworks. Readers should confirm requirements for their own state, because a minority of jurisdictions impose stricter procedural rules than the baseline uniform framework. Divorce and litigation cost comparisons draw on U.S. Census Bureau marital-status data for base rates.
Limitations: the cost table is modeled, not measured. It reflects quoted and advertised pricing, which may differ from amounts actually billed after negotiation rounds. The situational value rankings are analytical judgments derived from statutory structure, not outcome statistics, because no dataset tracks dissolution results by prenup status. Where period-specific or provider-specific data was unavailable, the calculation methodology is stated so readers can apply it to local quotes. Research last conducted July 2026.
All figures were verified against named primary sources before publication.