Only in narrow, clearly defined circumstances. A final financial order is meant to be permanent. It can be challenged two ways: by an appeal, if the court made an error, or by a set-aside application, if the order was tainted by undue influence, fraud, misrepresentation, non-disclosure, mistake or destroyed by a rare “Barder” event afterwards, and even then only if a materially different order would have been made. Success is uncommon, and delay can end your case before it begins.

Perhaps your ex lied about money. Perhaps something drastic has happened since you signed. Either way, you want a straight answer on whether the law will let you reopen things, not false hope. This guide provides exactly that, and if you would rather talk it through, our divorce and family law team in Leicester offers a free initial consultation.

Why are divorce settlements meant to be final?

Finality is the entire point of a financial order. Once a judge approves your consent order, or makes an order after a contested hearing, your financial ties are settled so you can both move on with certainty.

Many orders include a clean break, which cuts off all future claims. The courts protect this finality fiercely. If a settlement could be undone on a change of heart, no financial agreement would ever feel secure. It is also why we usually advise securing the order properly at the outset see our guide to what a sealed consent order does and doesn’t cover.

The default is that a final order stays final. Everything below is an exception to that rule, not a routine alternative.

Can a divorce settlement be reopened in the UK?

Yes, but only on specific legal grounds, and only a small minority of attempts succeed. There are two separate routes, and they answer two different questions:

  • Did the court get something wrong when it made the order? That’s an appeal.
  • Is the order itself undermined by undue influence, fraud, misrepresentation, non-disclosure, mistake or a later catastrophe, with no criticism of the court, and would it have made a materially different order otherwise? That’s a set-aside application.

Choosing the right route from the outset matters enormously. The framework for set-aside applications sits in rule 9.9A of the Family Procedure Rules, introduced in 2016.

Appeal vs set-aside: what’s the difference, and when does each apply?

People tend to lump these together as “appealing,” but they’re distinct in law and procedure. Here’s how they compare:

Appeal Set-aside (FPR 9.9A)
Core question Did the court err in law, fact or procedure? Did the judge misapply the law? Is the order tainted by something outside the court’s decision, and would a different order otherwise have been made?
Typical grounds The judge misapplied the law or reached a decision not open to them. Undue influence, fraud, misrepresentation, material non-disclosure or mistake or a Barder event.
Which court A higher court, and you need permission to appeal. The same court that made the order, within the original case.
Time limit Strict, usually 21 days to file the notice. No fixed deadline, but you must act promptly.

For most people who believe their ex was dishonest, or whose lives have been upended since the order, the set-aside route is the relevant one.

It helps to understand how the set-aside test actually works. For every ground except a Barder event, the court applies a two-part test:

  1. Was the order affected by a vitiating factor undue influence, fraud, misrepresentation or mistake (and, in the disclosure context, a spouse’s material non-disclosure)?
  2. Would the correct information have made a material change to the order the court made?

Both limbs have to be satisfied. A misrepresentation, mistake or omission that would not have altered the outcome is not enough on its own; the flawed information must be material to the result. Barder events are assessed differently, under the four conditions set out further below.

Can a settlement be set aside if my ex hid assets?

Yes. Where a settlement rested on incomplete or dishonest financial information, the wronged party can apply to set it aside provided that non-disclosure was material, meaning honest disclosure would have changed the order. This material non-disclosure route is the most common reason final orders get reopened.

Both spouses owe a duty of full and frank disclosure. If your ex concealed accounts, undervalued a business, or understated income, your agreement was reached on a false picture, and the court can unwind it.

The leading authorities are two Supreme Court cases decided together on 14 October 2015:

  • Sharland v Sharland [2015] UKSC 60: the husband hid that he was actively preparing a stock-market flotation that would have made his shareholding far more valuable. The court refused to let the order stand.
  • Gohil v Gohil [2015] UKSC 61: the husband concealed substantial assets and was later jailed for fraud and money laundering. The order his wife had settled for years earlier was set aside.

Together these cases established the principle often summed up as “fraud unravels all.” A settlement obtained through lies about money can be reopened, sometimes long after the event.

To understand what proper disclosure should have looked like, see our companion guides on financial disclosure in divorce and tackling hidden assets.

What is a Barder event, and when can later events reopen a settlement?

A Barder event is a rare, dramatic change that happens after the order and destroys the very basis on which it was made. The name comes from Barder v Barder [1987], a House of Lords case in which, only five weeks after a consent order, the wife tragically took her own life and those of the couple’s children, wiping out the entire premise of the settlement.

To succeed on a Barder event, all four of these conditions must be met:

  • A new event has occurred since the order that invalidates the basis or fundamental assumption on which it was made, so that a challenge would be very likely to succeed.
  • The event happened within a short period of the order, usually weeks, rarely more than a few months.
  • The application is made reasonably promptly.
  • Reopening would not unfairly prejudice third parties who have since acquired an interest in the relevant property in good faith.

There’s also a firm requirement that the event was genuinely unforeseen and unforeseeable.

What does and doesn’t count as a Barder event?

Can qualify Usually doesn’t
Death of a party shortly after the order, destroying its basis. A fall in the value of shares, property or investments.
A sudden, unforeseeable collapse of the order’s key assumption. An ex’s business unexpectedly thriving after settlement.
Regret, a new relationship, or ordinary life changes.

The one that surprises people most: a market crash usually does not count. Courts treat the rise and fall of asset values as a normal, foreseeable risk. (Some recent cases have also suggested a further condition, that no other remedy such as varying the order is available; your lawyer will factor this in.)

What are the time limits, and why does acting fast matter?

Delay defeats more of these cases than weak grounds do.

  • For an appeal, the notice must generally be filed within 21 days of the decision. Extensions are rarely granted, and courts have refused applications brought many months late.
  • For a set-aside application, there’s no single fixed deadline, but promptness is built into the test, especially for Barder events. Sitting on your suspicions signals you can live with the order and badly weakens your position.

If you think you may have grounds, get legal advice straight away. Waiting can turn a viable case into a hopeless one.

What can the court actually do if a challenge succeeds?

Winning the argument is not the same as being handed a better result. If a set-aside application succeeds, the court sets the original order aside and gives directions for the financial issues to be reheard.

Your finances are then reassessed under section 25 of the Matrimonial Causes Act 1973, the same framework used first time round and the one we explain in our guide to how a court decides a financial order in divorce. The fresh outcome could be more favourable, roughly the same, or occasionally worse. What you gain is a decision based on honest, complete information, not an automatic windfall.

What are realistic expectations if I want to reopen my settlement?

Here honesty serves you better than reassurance. Successful applications to reopen a settlement are genuinely rare, and the threshold is set high on purpose, to protect the finality that makes agreements worth having.

Realistically, you’ll need clear evidence of one of the following:

  • A vitiating factor: undue influence, fraud, misrepresentation, mistake or material non-disclosure that would have changed the outcome (the two-part set-aside test).
  • A genuine Barder event satisfying all four conditions.
  • A real error by the court that an appeal can correct.

If the honest position is that you agreed a deal with full information and now wish you hadn’t, that will not meet the bar. Better to know that at the start than after a costly application.

Reopening a divorce settlement: FAQs

How long do I have to reopen a settlement?

Roughly 21 days for an appeal. Set-aside applications have no fixed deadline, but you must act promptly, and delay can be fatal.

What counts as a Barder event?

A dramatic, unforeseeable event soon after the order that destroys its basis, such as a party’s death. Everyday changes in circumstances or asset values rarely qualify.

What if I just regret the deal?

Regret is not a legal ground. If you settled with accurate financial information, the court will not reopen the order simply because you’d now decide differently.

Can I reopen it if my ex’s business took off after we settled?

Almost never, provided it wasn’t concealed or foreseeable at the time. Later success is treated as a normal post-divorce development.

Do I have to prove my ex was deliberately dishonest?

Not exactly. The key test is whether the non-disclosure was material, meaning it would likely have changed the order. Deliberate concealment strengthens the case, but materiality is the crux which is exactly the second limb of the two-part set-aside test.

How Holland Family Law can help

Challenging a final order is a serious step, and it isn’t right for everyone, which is precisely why honest, early advice is so valuable. Claire and the team at Holland Family Law can:

  • Assess whether your situation meets the Barder or non-disclosure threshold before you spend money on an application, so you know where you realistically stand.
  • Prepare the set-aside or appeal paperwork correctly, including choosing the right route from the outset.
  • Instruct a barrister where your case proceeds to a hearing, matching you with the right specialist advocate.

We’ll also tell you honestly if your prospects are poor. That candour is part of the service, because steering you away from a costly, unwinnable application matters as much as pursuing a strong one. If you’re weighing up your options, our financial orders team can give you a clear, realistic view.

Get honest advice on reopening your settlement

We offer clear, practical advice, and an initial consultation is provided at no charge. Contact Holland Family Law, based in Leicester. We support clients across London, Derby, Nottingham, Northampton, Lincoln, Loughborough, Birmingham, Buckinghamshire, and Windsor. Book your free, no-obligation 30-minute consultation today. Expert legal support is just a call away. Reach us on 0116 436 2170. We’re here to help you navigate the law with confidence.