How does your marriage contract affect your estate?
Your marriage contract decides what is even in your estate — before any will applies. In community of property there is one joint estate, and half of it belongs to your spouse already. Out of community, the estates are separate — with or without a shared claim on the growth.
Without an antenuptial contract, the default is in community of property. One estate, shared assets — and shared debt.
In community of property — the default
Marry without signing an antenuptial contract and the law merges everything into one joint estate: what each of you owned before, and everything either of you earns or owes after. Liabilities are shared too — a creditor of one spouse can claim against the joint estate.
At death, the joint estate is halved first. The surviving spouse's half is simply theirs — it is not an inheritance and no will can give it away. A will only ever disposes of the deceased's half.
Out of community, without accrual
An antenuptial contract that excludes the accrual system keeps the two estates fully separate, for life. What each spouse builds is theirs alone; so is what each owes. At death, the will deals with the whole of that separate estate — the surviving spouse has no automatic claim to a share of it.
Out of community, with accrual
The accrual system keeps the estates separate during the marriage, but shares the growth when the marriage ends — by divorce or by death. Each estate's growth since the wedding is measured; the spouse whose estate grew less has a claim for half the difference.
The sequencing is the part that matters for estates: the accrual claim is calculated and settled first, before the will distributes anything. Depending on which spouse dies, the claim can flow into the estate (enlarging what the will distributes) or out of it (as a debt the estate must pay before heirs are considered).
The contract runs before the will
This is the thread through all three regimes: the marriage contract determines what the estate is; only then does a will — or, without one, the intestate formula covered in "What happens if you die without a will in South Africa?" — decide where it goes. Two people with identical wills and identical wealth can leave completely different estates purely because of what was signed, or not signed, before the wedding.
It also feeds directly into estate duty: what passes to a surviving spouse is deductible, as covered in "What is estate duty and who pays it?" — and the marriage contract shapes how much passes that way.
Terms used on this page
- assets
- What you own that has value — property, savings, investments, retirement funds, a business.
- liabilities
- What you owe — the bond balance, vehicle finance, loans, credit cards, store accounts.
- accrual
- A marriage-contract system where each spouse's estate stays separate during the marriage, but the growth built up since the wedding is shared when the marriage ends — by divorce or death.
Reviewed July 2026