How a Swedish Prenuptial Agreement Affects Inheritance

When a married person dies in Sweden, the estate settlement process starts with a mandatory property division (bodelning) before anyone inherits anything. A prenuptial agreement (äktenskapsförord) fundamentally changes how that division works — and by extension, how much the surviving spouse and other heirs receive.

The Default: Everything Is Marital Property

Without a prenuptial agreement, Swedish law treats almost all assets owned by either spouse as marital property (giftorättsgods). When one spouse dies, the first step is a 50/50 split of the combined marital property between the surviving spouse and the estate.

Here is the practical effect: if the deceased owned assets worth 2,000,000 SEK and the surviving spouse owned assets worth 1,000,000 SEK, the total marital property pool is 3,000,000 SEK. The surviving spouse keeps half (1,500,000 SEK) as their marital property share. The remaining 1,500,000 SEK becomes the estate for inheritance purposes.

This means the surviving spouse's own assets are included in the calculation — which can either help or hurt them depending on the relative wealth of each spouse.

What an Äktenskapsförord Changes

A prenuptial agreement can designate some or all assets as enskild egendom (separate property). Separate property is excluded from the bodelning entirely. It stays with whoever owns it, no sharing.

Common arrangements include:

• Full separation — all assets are separate property. No bodelning at death. Each spouse's assets are handled independently.
• Partial separation — specific assets (a family cottage, inheritance, business ownership) are designated as separate. Everything else is marital property and subject to the 50/50 split.
• One-sided separation — one spouse's assets are separate, the other's are marital. This is sometimes used when one spouse enters the marriage with significantly more wealth.

How This Plays Out in Estate Settlement

The interaction between the prenuptial agreement and inheritance law creates scenarios that surprise many families:

Scenario 1: Prenup protects the surviving spouse. If the deceased had significantly more assets and the prenup designates each spouse's assets as separate, the surviving spouse keeps everything they own outright. Without the prenup, half the surviving spouse's own assets would have been pooled with the deceased's for the 50/50 split.

Scenario 2: Prenup hurts the surviving spouse. If the surviving spouse has fewer assets and the prenup designates everything as separate, they lose the benefit of the 50/50 split. A wealthy deceased's assets go entirely into the estate — and if there are children from a prior relationship (särkullbarn), those children can claim their share immediately, potentially leaving the surviving spouse with very little.

Scenario 3: Prenup and the four-base-amount minimum. Swedish law guarantees the surviving spouse a minimum of four prisbasbelopp (approximately 228,400 SEK in 2026) from the combined estate, regardless of what the prenuptial agreement says. This floor exists to prevent a spouse from being left destitute — but it only applies to married couples, not cohabitants (sambor).

The Bouppteckning Requirement

One critical detail: the prenuptial agreement must be disclosed in the estate inventory (bouppteckning). If the surviving spouse's assets are reported as enskild egendom under a registered prenuptial agreement, those assets are listed separately and excluded from the marital property calculation.

Failing to report the prenuptial agreement — or failing to disclose the surviving spouse's assets at all — is a common mistake that leads Skatteverket to reject the bouppteckning upon submission, forcing the estate to redo the inventory and miss the four-month filing deadline.

The prenuptial agreement must be registered with Skatteverket to be legally valid. An unregistered agreement has no legal effect, regardless of what the couple intended.

For International Couples

If one or both spouses are foreign nationals, the question of which country's marriage property law applies becomes critical. Under the EU Matrimonial Property Regulation, the default rule is the law of the country where the couple first established their common habitual residence after marriage. A prenuptial agreement can specify a different country's law — but it must be done correctly to be enforceable in Sweden.

This is the kind of cross-border complexity where a Swedish family lawyer (familjejurist) is worth the consultation fee. The Someone Died in Sweden guide explains the interaction between prenuptial agreements and the bouppteckning process, including what must be reported and how to avoid common filing mistakes.

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