When is a prenuptial agreement needed? 7 situations to consider
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Fact-checked: October 1, 2026 · Marriage Code Chapter 7.
A prenuptial agreement is not necessary for all spouses. It becomes relevant when you want certain property that would otherwise be marital property to be separate property instead – or when you later want to change property that you yourselves have made separate through a previous prenuptial agreement.
1. You own a home from before the marriage
It is common to believe that a home purchased before the wedding is automatically excluded from a future division of property. That is not the case. Ownership remains with the spouse who owns the home, but the value may still be subject to marital rights if the home is not separate property.
If the intention is for the home to be kept out of a future division of property, a prenuptial agreement may therefore be relevant.
2. One of you owns a business or shares
Shares and business holdings are not automatically separate. A prenuptial agreement can be used to make a company or certain shareholdings separate, while other property continues to be marital property.
Also consider the returns. Returns from separate property are, as a general rule, marital property unless you expressly decide otherwise in the legal document that makes the property separate.
3. You have large differences in wealth
If one spouse enters the marriage with significantly greater assets, you may want to decide that some or all of these assets shall be separate. A prenuptial agreement can cover only one spouse's property, both spouses' property, or certain specified assets.
Choose the scope based on the effect you actually want to achieve – not on a notion that a "prenuptial agreement" must always mean that all property is kept entirely separate.
4. You want to protect a family property or other specific asset
A property, summer house, or other asset with sentimental value can be made separate through a prenuptial agreement if it would otherwise be marital property. Describe the property clearly enough for it to be identifiable later.
If the asset is already separate due to a condition in a gift or will, however, a prenuptial agreement is not needed to create that separate status.
5. You are expecting an inheritance or gift
Inheritances and gifts are not automatically separate property. They become separate, among other ways, if a donor or testator has stipulated it. If such a condition is missing, the property may instead be marital property.
A prenuptial agreement can therefore be relevant if you want to make future property that falls to either spouse separate. If a third party has already made the property separate through gift or will conditions, normally no additional prenuptial agreement is needed for that specific effect.
6. You have children from previous relationships
Children from previous relationships may be a reason to engage in broader family legal planning, but a prenuptial agreement does not regulate the inheritance directly. It governs what is marital property and what is separate property during the division of property before the inheritance.
Who inherits subsequently is determined by the Inheritance Code and any will. If the goal is to influence the distribution of the estate, you therefore need to analyze the will separately.
7. You want to change a previous prenuptial agreement
If you have previously made property separate through a prenuptial agreement, you can decide through a new registered prenuptial agreement that it shall once again be marital property. An old agreement can thus be changed, but not through an informal addition or just by the spouses coming to a verbal agreement.
When is a prenuptial agreement often not needed?
- When the property is already separate through conditions in a gift or will and you are satisfied with that arrangement.
- When you want to regulate inheritance – a will is the right type of instrument for that.
- When you want to transfer ownership – this requires other legal documentation depending on the type of property.
- When you want to decide who is liable to the bank – this is governed by the loan agreement.
- When you actually want to document a completed division of property – then a division of property document is needed.
Can a prenuptial agreement be valid for only five years or only in case of divorce?
The Swedish Tax Agency's current legal guidance states that spouses cannot time-limit or conditionally limit a prenuptial agreement. If you want to change the arrangement later, you instead create a new prenuptial agreement and register it.
A simple decision checklist
- What assets does each person own today?
- Which ones are already separate – and on what basis?
- Which ones do you want to be separate in the future?
- Should returns from the separate property also be separate?
- Does future property need to be covered?
- Is it actually inheritance, ownership, loans, or division of property that you are trying to regulate?
- Is the phrasing possible to register and compatible with Chapter 7 of the Marriage Code?
Further reading: Prenuptial Agreement – complete guide and different structures for prenuptial agreements.
Mallbutiken's Simple Prenuptial Agreement Template – Word/PDF costs 49 SEK. Customize exactly which property is to be covered and then register the agreement with the Swedish Tax Agency.
