There is the legal question of whether a prenup is fair — and then there is the human one: does it feel fair to both of you? Getting the second right is what makes a prenup something you both feel good about, not just something one of you tolerates. A prenup feels fair to both partners when it is built together rather than handed over finished: talk through the aims, decide the terms jointly, disclose fully on both sides, provide properly for each of you and any children, and take separate legal advice. That mutual fairness is also, conveniently, exactly what makes a court uphold it.
Two kinds of fairness — and why both matter
Lawyers talk about fairness in a technical sense: an agreement that meets both partners' needs and does not leave one in real difficulty. That matters for whether the agreement holds up. But there is a second, emotional kind of fairness — whether each partner genuinely feels the agreement respects them. A prenup can pass the legal test and still leave one partner quietly resentful, which is corrosive for a marriage. The best agreements satisfy both. Our guides to how to make a prenup fair and when a prenup is unfair cover the legal side; this guide is about the human one.
Involve both partners from the start
A prenup feels fair when it is built together, not handed over finished. The single biggest cause of a prenup feeling unfair is one partner presenting the other with a completed document to sign. Instead, talk through the aims together, decide the terms jointly, and make sure both partners' concerns are on the table from day one. It should quickly stop being "your idea" or "my idea" and become a shared plan — regardless of whose idea it was originally. Our guide to talking about a prenup shows how to set that collaborative tone.
Be open about everything
Full disclosure on both sides is not just a legal requirement — it is the foundation of a fair-feeling agreement. When each partner can see the whole picture, the terms feel honest rather than one-sided, and nobody is agreeing to something in the dark. Hiding or downplaying assets has the opposite effect: even if it is never discovered, it poisons the sense of fairness, and if it is discovered it can have the agreement overturned. Openness protects both the relationship and the document.
Provide for both of you
An agreement that protects what genuinely needs protecting — a business, an inheritance, pre-marital property — while still making proper provision for both partners and any children feels balanced, and is also the kind a court will uphold. Trying to keep everything for one partner feels unfair because it is, and it fails the legal test into the bargain. Fair does not have to mean an exact 50/50 split; it means a balanced outcome that meets both partners' reasonable needs. Think about the position the less-wealthy partner would be left in, and make sure it is one you would both regard as decent.
Practical ways to build in fairness
- Protect the source, share the growth. For example, ring-fence one partner's deposit on the family home while sharing any increase in its value.
- Recognise non-financial contributions. Provide fairly for a partner who gives up income to be a stay-at-home parent or to support the other's career.
- Let terms soften over time. A review clause or a sunset clause can make an agreement feel fairer as the marriage lengthens and lives change.
- Meet needs first. Make sure neither partner would be left without a home or income — the court's needs principle is a good yardstick for human fairness too.
Get separate advice
Each partner having their own legal adviser means both feel properly looked after and sure of what they are agreeing to. It removes the fear of being out-manoeuvred, because a solicitor acting only for you will tell you plainly whether the terms are reasonable. That reassurance is often what turns a reluctant partner into a willing one — and it reflects exactly the steps in what to include. Sharing a single solicitor, by contrast, undermines the sense (and the legal reality) of fairness.
Watch for hidden resentment
A partner who agrees just to keep the peace, without really feeling the terms are fair, stores up trouble. Check in honestly: does your partner genuinely feel good about this, or are they simply going along with it? If it is the latter, keep talking — a prenup you both believe in is worth far more than a signature obtained by wearing someone down. If you are stuck on particular points, our guide on working through disagreement on terms can help you find the fair middle.
Why fairness is also the legal test
The reassuring thing about aiming for genuine fairness is that it is not merely a nice ideal — it is very close to what the courts actually look for. Since Radmacher v Granatino (2010), an English court will give a prenup significant weight provided it was freely entered into by each party with a full appreciation of its implications, and provided it is not unfair to hold the couple to it in the circumstances that have arisen. That test cannot be signed away: the court keeps an overriding discretion under the Matrimonial Causes Act 1973, and it will always make sure both partners' needs are met and that any children are properly provided for. So an agreement engineered to be one-sided is doing double harm: it stores up resentment in the relationship and it is the kind a court is most likely to unpick. Building in real fairness from the start is therefore the single best way to make an agreement that both feels right and stands up. It is worth remembering, too, that the Law Commission’s proposed "qualifying nuptial agreements" — which would make a properly made prenup formally binding — are not yet law, so fairness and the court’s discretion remain central.
A worked example of a balanced agreement
Picture a couple where one partner brings a £60,000 deposit from selling a flat they owned before the relationship, and the other brings little capital but will later take several years out of work to raise children. A crude prenup might simply say the deposit and the house stay with the first partner. A balanced one does something fairer: it ring-fences the original £60,000 deposit as that partner’s separate money, but treats the growth in the home’s value during the marriage as shared, and makes clear that the partner who steps back from their career will be provided for so they are never left without a home or income. Both take independent advice, both disclose everything, and a review clause means they revisit the terms if children arrive. Neither partner "wins"; both feel looked after. That is what fairness looks like in practice — specific, generous where it matters, and comfortable to explain to a friend, a solicitor or, if it ever came to it, a judge.
Revisit fairness as life changes
An agreement that feels perfectly fair on the day you sign it can drift out of balance as your lives change — and building in a way to revisit it is one of the most underrated ways of keeping it fair. A prenup written when you were two earners with no children may look very different once one partner has taken years out of work to raise a family, or once a modest flat has become a much more valuable family home. A review clause that prompts you to look at the terms again after a few years, or on the birth of a child, keeps the agreement honest as circumstances move. Some couples also build in terms that soften automatically over time, so that the longer the marriage lasts the more is shared — reflecting the reality that a long marriage tends to blend two lives together. You can also update a prenup by agreement at any point, or make a fresh postnuptial agreement if your situation changes dramatically. Fairness, in other words, is not a single snapshot but something you can maintain. Thinking about it that way from the start makes an agreement that both partners can keep believing in, rather than one that quietly curdles into resentment as the years pass.
Making a prenup fair to both partners
A prenup feels fair to both partners when it is built together rather than handed over finished: talk through the aims, decide the terms jointly, and put both partners' concerns on the table from day one. Full disclosure on each side builds trust, proper provision for both of you (and any children) keeps it balanced, and separate legal advice means each partner feels properly looked after. Fair does not have to mean 50/50 — it means a balanced outcome that meets both partners' needs. That mutual fairness is also exactly what makes a court uphold it.
A fair prenup for both: FAQs
How do you make a prenup fair for both sides?
Build it together, disclose fully, provide for both partners and any children, and take separate legal advice.
Does a fair prenup mean a 50/50 split?
Not necessarily — fair means balanced and need-meeting, not identical shares (see how to make a prenup fair).
What makes a prenup feel unfair?
Being handed a finished document, hidden finances, one-sided terms, or sharing a single solicitor (see when a prenup is unfair).
How do you provide for a stay-at-home parent in a prenup?
Recognise non-financial contributions and make proper provision for their needs (see prenups and stay-at-home parents).
Does a fair prenup make it more likely to hold up?
Yes — fairness, full disclosure and independent advice are exactly what a court looks for (see are prenups legally binding?).
What if my partner agrees but seems unhappy?
Keep talking — a prenup you both genuinely believe in is worth far more than a reluctant signature (see working through disagreement).
Create your prenuptial agreement online
UK Prenup lets couples in England & Wales create a clear, fair prenuptial agreement online from £199, with your document generated instantly as a PDF. See how it works or get started.
UK Prenup is not a law firm and does not provide legal advice. A prenuptial agreement in England & Wales is not automatically binding, and both partners should take independent legal advice before signing.