Part of: Financial Settlement after Divorce
A separation agreement is a written contract between spouses or civil partners who have decided to live apart. It binds the two of you, but it does not bind a court. A judge can still decide your finances differently later, and no clause can take away either person’s right to ask (Matrimonial Causes Act 1973, s.34). Even so, courts in England and Wales give real weight to an agreement made fairly, with full financial information on both sides and nobody pushed into signing. Our divorce and separation specialists assist and advise couples at exactly this point.
You may already be living apart, or still at the kitchen table trying to work out what happens next. This guide explains what a legal separation agreement can and cannot do, what a court looks at, and how it compares with judicial separation and divorce. It covers the law of England and Wales only, because Scotland and Northern Ireland have their own rules.
Reviewed by: Iblal Iqbal, Partner & Family Law Strategist, Kabir Family Law
Key takeaways
- It is a contract, not a court order. It binds you both, but a court can still decide your finances differently later (Matrimonial Causes Act 1973, s.34).
- Fairness decides its weight. A court should give effect to an agreement you both made freely, understanding what it meant, unless holding you to it would be unfair (Radmacher v Granatino [2010] UKSC 42).
- Some clauses have no effect. A term that stops a parent asking the Child Maintenance Service for a calculation is void (Child Support Act 1991, s.9(4)).
- It cannot share a pension. Only a court can make a pension sharing order, and for a marriage only on divorce or nullity (Matrimonial Causes Act 1973, s.24B).
- Judicial separation is the court route. You stay married, and the court fee is £426 (GOV.UK).
- A court order makes the terms binding. If you later divorce, a judge can approve fair terms as a consent order, for a £62 fee (GOV.UK).
What is a separation agreement?
It is a written record of what you have both decided about the practical side of living apart: the home, the bills, savings, maintenance and the children. Some people call it a deed of separation, because couples often sign it as a deed. You may also see it called a legal separation agreement, which means the same thing.
You do not file it with a court. It stays private between you, unless one of you later asks a judge to look at it.
Many people use the phrase “legal separation” for any formal split. In England and Wales, though, there are two quite different routes:
- A private agreement: a contract you make together, with no court involved.
- Judicial separation: a court order under section 17 of the Matrimonial Causes Act 1973. Civil partners apply for a separation order instead (Civil Partnership Act 2004, s.56).
Both routes leave you married or in your civil partnership. So neither one lets you marry again or form a new civil partnership.
If you never married, you can still put your arrangements in writing, but different rules apply. Our guide to cohabitation agreements is the right place to start.
Is a separation agreement legally binding?
It binds the two of you, but it does not bind the court. Section 34 of the Matrimonial Causes Act 1973 says the financial arrangements in a written agreement between spouses bind the people who made it. The same section makes void any clause that tries to stop either of you applying to court for a financial order. In addition, section 35 lets a court change the financial terms if circumstances change, or if the agreement does not provide properly for a child.
That does not make your signature worthless. When a court decides how to share your finances, it must look at all the circumstances under section 25, and your agreement is one of them.
The Supreme Court set out the modern approach in Radmacher v Granatino [2010] UKSC 42. It treated an agreement made when a couple separates as one kind of post-nuptial agreement. A court should give effect to it if each of you entered into it freely, with a full appreciation of its implications, unless it would not be fair to hold you to it. The judgment also repeats an older warning from Edgar v Edgar [1980] 1 WLR 1410. Formal agreements reached properly and fairly, with competent advice, should not be set aside without good and substantial grounds.
In practice, a judge starts from what you agreed and asks whether holding you to it would be unfair. A different test applies to a deal you reach during court proceedings, which our guide to Xydhias agreements explains.
What does a court check before holding you to it?
There is no checklist in the Act. Instead, judges look at how you reached the agreement and whether it still works for your family today. This table shows the questions they usually ask. It is a guide to the court’s approach, not a test you can score on your own.
| What the court asks about | Why it matters | What can weaken the agreement |
|---|---|---|
| Disclosure | You can only agree fairly if you both know what exists. | Estimates instead of documents, or an asset left out. |
| Advice | Separate advice shows you both understood the terms. | One adviser for both of you, or no advice at all. |
| Pressure and timing | A choice you make freely carries more weight. | Signing in a rush, under threat, or while unwell. |
| Fairness and needs | A judge checks that both homes, and any children, can manage. | Terms that leave one of you unable to house yourself. |
| The children | Their welfare comes first when a court decides questions about their upbringing. | Arrangements that ignore how the children really live. |
| Changes since signing | The court looks at the facts as they are now, not as they were. | A new baby, job loss, illness or a big change in income. |
If any row worries you, that is a reason to take advice before you sign, not after.
What can a separation agreement cover?
Most agreements deal with the same practical questions. Use this list to plan the conversation, not to write the terms, because each point needs a judgement about what is fair for your family.
- The home. Who stays, who pays the mortgage or rent, and what happens if you sell.
- Bills and debts. Who pays what, and what happens to joint accounts and credit cards.
- Savings and other assets. Whether you divide them now or wait until any divorce.
- Maintenance. Whether one of you pays the other, how much, and for how long.
- The children. Where they live and when they see each parent. If you cannot agree, a court decides by putting the child’s welfare first (Children Act 1989, s.1).
- Child maintenance. You can agree a figure, but either parent can still ask the Child Maintenance Service for a calculation (Child Support Act 1991, s.9).
- Pensions. How you will treat them if you divorce later, because the agreement cannot divide a pension by itself.
- Getting back together. What happens to the agreement if you reconcile and live together again.
- The next step. Whether you plan to divorce, and whether you will ask a court to turn the terms into an order.
Should you choose a private agreement, judicial separation or divorce?
All three routes let you live apart with your arrangements in writing. However, they differ in cost, legal force and what happens to your marriage. The court fees below come from the GOV.UK pages on legal separation, divorce and consent orders.
| Question | Private agreement | Judicial separation | Divorce |
|---|---|---|---|
| What it is | A contract you sign together | A court order that formally records your separation | A court order that ends the marriage |
| Court fee | None | £426 | £628, plus £62 if you apply for a consent order |
| Legal force | Binds you both, but a court can revisit it | The court can make most financial orders | The court can make financial orders, including pension sharing |
| Pension sharing | No | No | Yes |
| Can either of you remarry? | No | No | Yes, once the final order comes through |
| Often chosen when | You agree and want time to decide | You married less than a year ago, or divorce conflicts with your faith | You both want a clear legal end |
Judicial separation needs no reason. The court must make the order once you apply with a statement that you want to be judicially separated (Matrimonial Causes Act 1973, s.17). You also cannot apply for divorce in the first year of marriage (section 3), which is one reason some couples choose it.
What should you watch for if you live apart without paperwork?
Some couples start with a trial separation and nothing in writing. That can work for a short, calm break. But if it drifts on, small problems grow. Savings run down, arguments start about who paid what, and nobody has a record of what you agreed for the children.
If you are wondering how to start a separation well, a few early steps help:
- Write down the date you stopped living together, because it can affect tax on assets you transfer to each other (GOV.UK).
- Talk before either of you stops paying a joint bill, since missed payments can affect you both.
- Avoid moving large sums out of joint accounts without discussing it first.
- Keep copies of bank statements, pension letters and mortgage details.
Time apart does not have to be final. Many couples use it to decide, and an agreement can say what happens if you reconcile. However, a written agreement is not the right tool if you feel unsafe at home. In that situation, the court can make an occupation order about who lives in the home.
How can you make the agreement more likely to hold?
No private agreement fully binds a court while you stay married. Still, the way you prepare a separation agreement affects how much weight a judge gives it later.
- Share full financial disclosure first. Use documents, such as payslips and pension statements, rather than estimates.
- Take separate advice. One adviser cannot properly advise you both, because your interests differ.
- Allow time. Signing in a hurry, or under pressure, gives the other person a reason to challenge it.
- Aim for terms that meet real needs. They should work for both homes and the children, not only for today.
- Sign it as a deed. Each of you signs in front of a witness, who then signs to confirm it. The law also requires a deed to be “delivered as a deed”, a formal step worth asking about before you sign (Law of Property (Miscellaneous Provisions) Act 1989, s.1).
- Agree when you will look at it again. For example, when either of you starts a divorce or your income changes a lot.
Keep the disclosure documents with the signed agreement. If anyone questions it later, they show what you both knew when you signed.
What happens to a separation agreement if you divorce?
The agreement does not turn into a court order on its own. When you divorce or end your civil partnership, you can ask the court to make a financial consent order in the same terms. A judge approves the order to make it legally binding if they think it is fair, and the court fee is £62.
Please do not skip this step. Without a financial order, claims between former spouses can stay open long after the divorce. In Wyatt v Vince [2015] UKSC 14, the Supreme Court let a former wife pursue a financial claim she made 19 years after the divorce.
If the terms no longer look fair, for example because years have passed or a child’s needs have changed, the judge can ask you to change them. So an agreement you signed some time ago may need updating first. This is also the stage where a pension can be shared, because a pension sharing order needs a divorce, dissolution or nullity order.
Frequently asked questions
Is a separation agreement a good idea?
It often is, if you both want to live apart without divorcing yet and you can agree the main terms. It gives you a written record and a plan for the children. However, it is not the right tool if one of you hides money, if there is abuse, or if you need a pension shared.
Do I need professional advice before signing one?
The law does not require it. Even so, separate advice for each of you is one of the things a judge looks for. Without it, the other person may find it easier to argue that the terms are unfair.
What is a wife or husband entitled to in a separation?
There is no fixed share. What each of you receives depends on what you agree or, if you cannot agree, on what a court would order under section 25 of the Matrimonial Causes Act 1973. The court looks at needs, income, property, contributions and the length of the marriage. It also gives first consideration to the welfare of any child under 18.
What are the disadvantages of legal separation in the UK?
A private agreement cannot share a pension, and a court can revisit it later. Judicial separation costs £426 and needs a court application. With either route you stay married, so neither of you can remarry. The rules also differ in Scotland and Northern Ireland.
Can you get back together after signing one?
Yes. Nothing stops you from reconciling. A carefully prepared agreement says what happens if you live together again, for example that it ends after a set period back together. If yours says nothing, take advice on whether the terms still apply.
Can we use a free template?
A free separation agreement template can help you list the topics. But it cannot tell you whether the terms are fair to you, or whether a judge would uphold them. The weight a court gives your agreement depends on disclosure, advice and fairness, not on the form you use.
Can the agreement stop my ex asking for a maintenance calculation?
No. Section 9(4) of the Child Support Act 1991 makes void any term that restricts a parent’s right to ask the Child Maintenance Service (CMS) for a maintenance calculation. An agreed figure can still work well while you both keep to it.
Thinking of signing a separation agreement? Get advice before you sign
Signing is a big step, and it is far easier to get the terms right now than to unpick them later. What you each disclosed, how you dealt with the home and pensions, and whether a judge would see the terms as fair all matter. Book a free initial consultation, where one of our specialists gives you initial advice tailored to your circumstances. You can also read more about our divorce and separation specialists.
Expert Tip
Trouble usually starts when a couple signs quickly, before both people have shared full figures. If a pension or savings account comes to light later, the other person has a clear reason to ask a court to look again. Share documents rather than estimates, and give each other time to take separate advice. Also write down the date you stopped living together, because it can matter later for tax.
Garry Steedman, Family Law Consultant (Divorce, Children & TOLATA)
