NYS separation agreement: what it is, what it must include, and how to file it

Last updated 2026-07-09

What is a New York separation agreement and how is it different from a divorce?

A New York separation agreement is a written, notarized contract between two spouses who have decided to live apart. It is not a divorce. The marriage still exists, and neither spouse can remarry until a court enters a judgment of divorce.

What it does do is lock in the terms both spouses negotiated: who pays the mortgage, who keeps the retirement account, how much child support one parent pays, whether one spouse gets maintenance. Once it's signed and notarized, it has the same force as any other contract. Break it, and the other spouse can sue.

The big legal difference from a divorce is that a separation agreement does not end the marriage. You stay legally married until a court signs off. New York is one of the few states where the agreement itself becomes a ground for divorce, though. Under New York Domestic Relations Law § 170(6), if the spouses live separately under a written agreement for one year, either spouse can file for divorce using the agreement as the sole ground ^[1]. That's the conversion divorce path. For couples who already agree on everything, it's one of the cleanest ways to end a marriage in this state.

Some couples sign a separation agreement and never convert it, usually for religious reasons, to keep health insurance under a spouse's plan, or because nobody's in a rush. That's a legitimate choice. Just know that Social Security survivor benefits and some pension rights can hinge on marital status, so staying legally married has real downstream effects worth thinking through.

What does a New York separation agreement legally have to include?

New York law gives you no checklist of required clauses, but the courts and decades of case law have made clear what an agreement needs to hold up. Skip an important topic and a judge can refuse to fold the agreement into a divorce judgment, or a spouse can challenge it later.

Here's what you cover:

Identity and recitals. Full legal names, date of marriage, county of marriage, and a statement that both parties are separating voluntarily.

Property division. Every major asset has to be addressed: the marital home (who keeps it, who buys out whom, or when it sells), bank accounts, investment accounts, retirement accounts, vehicles, and personal property. New York is an equitable distribution state under DRL § 236B, which means marital property is divided fairly, and fair does not always mean 50/50 ^[2]. The agreement is where you write down what you've decided is fair.

Retirement accounts. If one spouse has a 401(k) or pension the other is entitled to a share of, say in the agreement that a Qualified Domestic Relations Order (QDRO) will be prepared. The agreement itself does not move retirement funds. A separate QDRO does that. Skipping this is one of the most expensive mistakes couples make.

Debt allocation. Who pays the mortgage, car loans, credit cards, student loans, everything. Be specific. "Wife will pay the Chase Visa ending in 4421" is enforceable. "Parties will divide debts fairly" is nearly useless.

Spousal maintenance (alimony). Whether maintenance gets paid, how much, for how long, and when it ends. New York has advisory maintenance guidelines under DRL § 236B(6) that courts treat as a starting point ^[3]. You can agree to more or less than the guidelines, but if you waive maintenance entirely, both spouses need to say so in the agreement, clearly and knowingly. See our article on alimony for how New York runs the math.

Children: custody and parenting time. If you have minor children, the agreement has to address legal custody (who makes major decisions), physical custody (where the child lives), and a parenting schedule. Courts don't rubber-stamp whatever parents wrote. A judge has to find the arrangement is in the child's best interests before putting it in any order ^[4].

Child support. New York child support runs on the Child Support Standards Act (CSSA), codified at Family Court Act § 413 ^[5]. The agreement has to state the support amount and either follow the CSSA formula or, if it deviates, explain why and confirm both parties understand their CSSA rights. Estimate the statutory number before you negotiate with our child support calculator.

Health insurance. Who covers the children, and for how long. Who covers the other spouse (and note that COBRA after divorce is time-limited and pricey).

Taxes. Who claims the mortgage interest deduction, who claims the kids as dependents, how old joint returns get handled if they're amended or audited.

Mutual release clause. Each party releases the other from all claims arising out of the marriage, subject to the agreement itself. Standard, and it protects both sides.

Merger vs. survival. This one matters a lot. If the agreement "merges" into the divorce judgment, it loses its status as a contract and only a court can change it. If it "survives" the judgment, it stays an independent contract, so a spouse can sue for breach on top of asking a court to enforce it. Property and debt terms usually survive. Child support and custody usually merge. Talk to a divorce attorney if you're not sure which fits.

Execution block. Both spouses sign, and each signature gets separately acknowledged before a notary. Not optional. New York courts have tossed agreements that weren't properly notarized ^[6].

Does a New York separation agreement have to be notarized?

Yes. Full stop.

New York Domestic Relations Law § 236B(3) requires that any agreement between spouses affecting marital rights be in writing and "subscribed by the parties, and acknowledged or proved in the manner required to entitle a deed to be recorded" ^[6]. Each spouse signs before a notary who completes a formal acknowledgment block, the same way you'd sign a deed to real property.

That's stricter than most states. A witnessed signature is not enough. A signature in front of a notary without the right acknowledgment language is not enough. Courts have refused to enforce separation agreements over a defective notarization even when both parties plainly agreed to the terms.

In practice, each spouse appears before a notary, separately or together. Banks, UPS Stores, and many public libraries do notary work, usually for free or a few dollars. Make sure the notary uses the acknowledgment block that reads something like: "On the ___ day of ___, before me personally came [name], to me known to be the individual described in and who executed the foregoing instrument, and acknowledged that [he/she/they] executed the same." That exact kind of language is what makes it stick.

How do you file a separation agreement in New York?

You don't file the separation agreement with a court when you sign it. It's a private contract. You keep the original, your spouse keeps a copy, and no court filing happens at signing.

Filing comes later, in one of two situations.

Scenario 1: You convert the agreement into a divorce. After living separately under the agreement for one full year, either spouse can start a divorce action in Supreme Court (the trial court that handles divorce in New York). You file a Summons with Notice or a Summons and Verified Complaint, plus a copy of the separation agreement. The agreement gets filed with the county clerk, and a certified copy goes to the court with the divorce papers ^[7]. The filing fee for a divorce in Supreme Court is $210 as of 2024, payable to the county clerk ^[8]. Can't afford it? Apply for a fee waiver with Form IFP (In Forma Pauperis).

Scenario 2: You file to enforce it. If your spouse violates the agreement (stops paying maintenance, say) and you want a court to enforce it without a full divorce, you can bring a breach of contract action in Supreme Court or, for support violations specifically, file in Family Court under Family Court Act § 461.

County clerks and court self-help centers can point you to the forms you need. The New York State Unified Court System keeps a self-help page with forms at nycourts.gov ^[9].

What does it cost to prepare and file a New York separation agreement?

Costs split into two buckets: drafting the agreement, and later filing the divorce.

Drafting costs swing wildly. An attorney-drafted separation agreement in New York City or the suburbs typically runs $1,500 to $5,000 per spouse when both attorneys are involved, and higher with business interests or contested issues. Some attorneys charge a flat fee for straightforward agreements. Others bill hourly at $300 to $600 in metro areas, $200 to $350 upstate.

Online document services and self-help packets cost far less. A packet that produces a complete, New York-specific separation agreement runs about $150 to $300 through services like DivorceClear (our $149 packet covers the separation agreement and every form you need for conversion). The trade-off: you have to understand what goes into the agreement and fill in the details yourself. For couples with no minor children, no real property, and modest assets, that trade is reasonable.

Got a closely held business, a defined-benefit pension, real estate with a mortgage, or a real dispute about anything? Pay an attorney to at least review the draft.

Court filing costs when you convert to divorce are $210 at filing in Supreme Court ^[8]. Smaller costs pile on too: certified copies of the judgment run $6 to $10 each, and a QDRO to divide a retirement account usually adds $500 to $1,500.

The side-by-side is below.

Cost item	DIY / document packet	Attorney-drafted
Separation agreement drafting	$0 to $300	$1,500 to $5,000+
Notarization	$0 to $20	Usually included
Supreme Court filing fee	$210	$210
Process server (to serve spouse)	$50 to $150	$50 to $150
QDRO (if retirement account involved)	$500 to $1,500	$500 to $1,500
Certified copies of judgment	$6 to $30	$6 to $30
Typical total	$260 to $2,000	$2,265 to $7,000+

Can a separation agreement be challenged or thrown out by a court?

Yes, and courts do throw them out when the facts line up.

New York courts apply contract law to separation agreements, but they add a layer of scrutiny because one spouse can so easily take advantage of the other. Here are the grounds a court will listen to:

Fraud or misrepresentation. If one spouse hid assets or lied about the value of marital property during negotiations, the other can move to void the agreement. That's why financial disclosure, though not technically required by statute for separation agreements (unlike prenups under DRL § 236B(3)), is worth doing anyway.

Duress or coercion. Signing under threat or extreme pressure can invalidate an agreement. Courts weigh the totality of circumstances. Economic pressure alone rarely does it, but physical threats or severe emotional manipulation can.

Unconscionability. If a deal is so one-sided it shocks the conscience, a court can refuse to enforce it. High bar. Still, agreements that leave one spouse destitute while the other walks off with everything have been voided.

Failure to meet formal requirements. Improper notarization is a real killer. So is a vague, ambiguous agreement that leaves major issues open.

Provisions affecting children. A court can change any child support or custody term if circumstances shift materially or the original terms aren't in the child's best interests. That's not "throwing out" the agreement, but it means child-related terms are never truly final.

The New York Court of Appeals has treated separation agreements as "contracts subject to the principles of contract interpretation," enforced according to the parties' intent as written. The lesson: use plain, specific language, and cover everything.

How long does it take to convert a New York separation agreement into a divorce?

The statutory minimum is one year of living separately under the agreement ^[1]. The clock starts the day both spouses sign the notarized agreement, assuming they actually live apart from that date on.

After the one-year mark, the conversion divorce moves at the pace of your county's Supreme Court. Uncontested divorces where both parties cooperate and the paperwork is clean run anywhere from 3 months to over a year, depending on the county. New York City counties (Manhattan, Brooklyn, Queens, the Bronx, Staten Island) are badly backlogged. Upstate counties move faster. Nobody tracks this reliably at the state level, but practicing attorneys commonly cite 6 to 9 months as a fair expectation for an uncontested case in the metro area.

Soup to nuts, from signing the agreement to holding a divorce judgment, most couples on the conversion route spend 15 to 24 months. Need a faster divorce? New York also offers no-fault divorce on the irretrievable breakdown ground (DRL § 170(7)), which skips the one-year wait after signing anything. It just requires that the marriage has broken down irretrievably for at least six months.

For a full walk-through of the divorce papers you file at each stage of a New York uncontested divorce, that article lays out what you file and in what order.

What happens to the separation agreement if one spouse dies before the divorce is final?

This is an underappreciated risk. If one spouse dies while the marriage is still legally intact (before a divorce judgment gets entered), the survivor may still hold marital rights as a legal spouse. The separation agreement can and should deal with this.

A well-drafted agreement includes clauses in which each spouse waives any right to the other's estate beyond what the agreement itself provides. Under New York's Estates, Powers and Trusts Law § 5-1.1-A, a surviving spouse has a right of election against the deceased spouse's estate, currently the greater of $50,000 or one-third of the net estate ^[10]. An agreement can waive that right, but the waiver has to be clear and explicit.

Update your beneficiary designations too, the moment you sign. Life insurance, retirement accounts, bank accounts. Beneficiary designations pass outside both the will and the separation agreement. Forget to change them and your estranged spouse can inherit your 401(k) no matter what the agreement says.

On health insurance, if one spouse is covered under the other's employer plan, a separation agreement does not trigger a COBRA qualifying event by itself. The qualifying event is the divorce judgment. That's one practical reason some couples keep separation status indefinitely rather than convert.

Do you need a lawyer to write a New York separation agreement?

No. New York law does not require an attorney to draft or review a separation agreement. Adults can contract with each other without lawyers. But the money and legal stakes are high, and the formal requirements are stricter than in most states.

Here's my honest read on when you can do it yourself and when you shouldn't.

DIY is reasonable when: no minor children, no real property, no pension or retirement accounts to divide, both spouses employed and financially independent, and the asset picture is simple (a joint checking account, a car each). There, a well-researched template, properly customized and notarized, does the job.

Get at least a review when: you have minor children (custody and support mistakes are hard to undo), you own real property together, one spouse has a defined-benefit pension or a big 401(k), one spouse has much more income or assets than the other, or either spouse owns a business.

Get full representation when: there's a history of financial deception, domestic violence or coercion, complex business interests, or a spouse who won't cooperate.

There's a good middle path for a lot of people: draft the agreement yourself with a solid document packet, then pay one attorney for a limited-scope review, sometimes called unbundled legal services. New York attorneys can ethically offer this kind of limited representation ^[11]. A review-only engagement might run $300 to $700 instead of $3,000 for full representation. That's often money well spent.

For a wider look at what attorneys actually do in divorce and whether you need one, see our breakdown of what a divorce lawyer handles.

How does a New York separation agreement handle child custody and support?

This is where you have to be most careful, because the law imposes outside standards that override whatever the parents agreed to if the agreement falls short.

Child support. The CSSA formula applies no matter what parents put in the agreement ^[5]. You take combined parental income, apply a percentage based on the number of children (17% for one child, 25% for two, 29% for three, 31% for four, and at least 35% for five or more), split it by each parent's income share, and land on a weekly support number. If your agreement deviates from that number, the agreement has to state: (a) the amount that would have been payable under the CSSA, (b) the agreed amount, and (c) the reason for the deviation. Miss any of those three and a judge converting the agreement to a divorce judgment can reject the child support provision.

The income used in the CSSA calculation is capped. As of 2024, the cap is $163,000 for the first tier ^[5]. A court can also consider income above the cap at its discretion.

Custody. Legal custody governs who makes major decisions about education, healthcare, and religion. Physical (residential) custody sets where the child lives. Parents can agree to joint legal custody, sole legal custody, or any mix. The agreement should spell out how decisions get made when parents disagree (joint legal custody with a tiebreaker clause is common) and lay out a detailed parenting schedule covering holidays, school breaks, and vacations.

Every custody provision in a separation agreement can be modified if there's a substantial change in circumstances. A court will always put the child's best interests over whatever contract the parents made. That's not a flaw in the system. It's the point of it.

Where can you get free help with a New York separation agreement?

New York has more self-help resources than most states, and you should use them.

The New York State Unified Court System runs self-help centers in courthouses across the state. Staff there explain forms, point you to the right court, and check whether your paperwork is complete. They can't give legal advice, but they can tell you if something's missing. Find locations at nycourts.gov ^[9].

The New York Courts website also hosts the "Do Your Own Divorce" packet, a set of official uncontested divorce forms that includes the conversion divorce process ^[7]. If you already have a signed separation agreement, these forms carry you through the conversion filing.

New York Legal Assistance Group (NYLAG) and Legal Aid offices in most counties give free legal help to people who qualify by income. NYC residents can use the NYC Family Court Help Center. Law school clinics at Fordham, Cardozo, and CUNY School of Law sometimes take separation and divorce matters.

Before you head to the courthouse, our guide to divorce papers covers the full stack of documents in plain language.

DivorceClear's $149 document packet covers New York-specific separation agreements, all the conversion divorce forms, and instructions matched to each county's local rules. Worth naming once as a concrete option for people who want everything in one place and don't qualify for free legal aid but can't stomach full attorney fees.

Frequently asked questions

Can I write my own separation agreement in New York without a lawyer?

Yes. New York law does not require an attorney. You need a written, signed, properly notarized agreement covering property, debt, support, and custody if you have children. The DIY risk is missing a required element, especially the CSSA disclosure for child support or the acknowledgment block for notarization. For simple situations with no children and modest assets, a well-researched template works. For anything more complex, have an attorney review it.

How much does a New York separation agreement cost?

Drafting runs $0 to $5,000 depending on whether you use a self-help template, a document service, or attorneys on both sides. A document packet from a service like DivorceClear costs around $149. Attorney-drafted agreements in New York typically run $1,500 to $5,000 per side in metro areas. The later court filing fee to convert the agreement to a divorce is $210 in Supreme Court, payable to the county clerk.

Does a separation agreement have to be filed with a New York court?

Not when you sign it. The agreement is a private contract and stays in your hands. Filing comes later: when you convert it to a divorce in Supreme Court, you submit a certified copy of the agreement with your divorce papers. To enforce it without divorcing, you can file a breach of contract action in Supreme Court or, for support violations, in Family Court under FCA § 461.

What is the difference between a separation agreement and a legal separation in New York?

A separation agreement is a private contract between spouses. A legal separation (a "judgment of separation") is a court order you get through a separation action in Supreme Court under DRL § 200. Very few people pursue a formal court judgment of separation because it costs about as much as a divorce and accomplishes less. The separation agreement route is almost always the better choice for couples who agree on terms.

Can a separation agreement be modified after it is signed?

Property and debt provisions are generally final once the agreement is signed and can only change through a new written agreement between both spouses. Child support and custody provisions can be modified by a court if there's a substantial change in circumstances, regardless of what the agreement says. Maintenance provisions can be modified if the agreement expressly allows it; otherwise they may be fixed.

Does living together void a New York separation agreement?

It can. The conversion divorce ground under DRL § 170(6) requires that the spouses live separately and apart under the agreement for one full year. If the spouses resume living together, the one-year clock may restart or the conversion ground may become unavailable. Courts look at the whole living arrangement. Brief visits don't necessarily reset the clock, but moving back in together clearly does.

How long does a separation agreement last in New York?

As long as the marriage exists and neither party has converted it to a divorce. It stays in force until a divorce judgment is entered (at which point it either merges into the judgment or survives as a separate contract, depending on its terms), until both parties agree in writing to change or cancel it, or until a court modifies child-related provisions. The law builds in no expiration date.

What notarization is required for a New York separation agreement?

Each spouse's signature must be acknowledged before a notary public using formal acknowledgment language, the same standard required to record a deed. A witnessed signature is not enough. The notary must complete the acknowledgment block, more than stamp the document. Courts have voided agreements over defective notarization even when both parties clearly agreed to the terms. Banks, UPS Stores, and many libraries offer free or low-cost notary services.

Can a separation agreement address a spouse's pension or 401(k)?

Yes, and it should. The agreement should state each spouse's entitlement to retirement accounts built up during the marriage. But the agreement itself does not move those funds. A separate court order, a Qualified Domestic Relations Order (QDRO) for 401(k) plans or a similar order for pensions, is what actually moves the money. QDRO preparation typically costs $500 to $1,500 through a specialist. Don't skip this step.

What happens if my spouse refuses to sign the separation agreement?

You can't force a spouse to sign. It's a contract and needs both parties' consent. If your spouse refuses, you still have options: file for divorce directly on the no-fault irretrievable breakdown ground under DRL § 170(7), which requires no agreement; seek a court-ordered judgment of separation under DRL § 200; or go to mediation to try to reach agreement on the contested terms.

Does a New York separation agreement affect health insurance?

Signing a separation agreement does not automatically trigger a COBRA qualifying event. The qualifying event under federal COBRA law is the actual divorce judgment. Until the divorce is final, a covered spouse may stay on the other's employer health plan if the plan allows it. The agreement should spell out how health insurance is handled and who pays COBRA premiums after the divorce judgment is entered.

Is a separation agreement the same as a divorce settlement agreement?

Similar documents, different purposes. A separation agreement is signed while both parties intend to stay legally married, at least for now. A divorce settlement agreement (also called a stipulation of settlement) is signed as part of an active divorce proceeding and gets incorporated straight into the divorce judgment. In practice, many New York couples sign a separation agreement and then convert it, which makes the two documents functionally one.

How does New York determine if a separation agreement is fair?

Courts generally enforce separation agreements freely negotiated between informed adults, even if the deal favors one spouse heavily. The grounds for voiding an agreement are fraud, duress, unconscionability, or failure to meet formal requirements. Courts do not re-examine the fairness of a property split. They do apply an independent best-interests standard to child custody and support provisions, no matter what the agreement says.

Sources

1. New York Domestic Relations Law § 170(6), NYS Legislature: A divorce may be granted after the parties have lived separately under a written agreement for one year, the ground for conversion divorce in New York.
2. New York Domestic Relations Law § 236B, NYS Legislature: New York is an equitable distribution state; marital property is divided fairly rather than automatically equally.
3. New York Domestic Relations Law § 236B(6), Maintenance Guidelines, NYS Legislature: New York has statutory spousal maintenance guidelines that courts use as a starting point for determining maintenance awards.
4. New York Family Court Act § 651, NYS Legislature: Courts must find that custody arrangements are in the best interests of the child before incorporating them into any order.
5. New York Family Court Act § 413, Child Support Standards Act, NYS Legislature: The CSSA formula governs child support in New York, with percentage multipliers by number of children and an income cap of $163,000 as of 2024.
6. New York Domestic Relations Law § 236B(3), Formal Requirements for Agreements, NYS Legislature: Agreements between spouses affecting marital rights must be in writing and acknowledged in the manner required to entitle a deed to be recorded.
7. New York State Unified Court System, Uncontested Divorce Forms Packet: The New York courts system provides an official uncontested divorce forms packet that includes the conversion divorce process using a separation agreement.
8. New York State Unified Court System, Court Fees: The filing fee for commencing a divorce action in New York Supreme Court is $210 as of 2024.
9. New York State Unified Court System, Self-Help Centers: The NYS court system operates self-help centers in courthouses across the state where people can get procedural assistance.
10. New York Estates, Powers and Trusts Law § 5-1.1-A, NYS Legislature: A surviving spouse has a right of election against a deceased spouse's estate equal to the greater of $50,000 or one-third of the net estate.
11. New York State Bar Association, Rules of Professional Conduct Rule 1.2: New York attorneys may ethically offer limited-scope representation, also called unbundled legal services, in family law matters.