Combined Special Benefit & Contribution Share Calculator | Simulate Concrete Inheritance Shares in an Estate Division
Enter the total estate value along with each heir's special benefit amount and contribution share amount to instantly calculate the deemed estate, statutory share, and concrete share, accounting for both Civil Code Article 903 and Article 904-2 at once. A free simulator.
In a real estate division discussion, it is common for an heir who received lifetime gifts (a special benefit) and an heir who contributed to maintaining or growing the deceased's estate (a contribution share) to both be at issue at the same time. This tool calculates a single "deemed estate" that reflects both the advancement of special benefits (Civil Code Article 903, added to the estate) and the deduction of a contribution share (Civil Code Article 904-2, deducted from the estate), and estimates each heir's concrete share. If only one of these applies to your case, it is simpler to use the special benefit advancement calculator or the contribution share calculator on its own.
Simulate from the estate value, heir composition, special benefit amounts, and contribution amounts
Tips
- If only special benefits or only a contribution share applies to your case, the dedicated single-purpose calculators (special benefit advancement, contribution share) have simpler input fields and are easier to follow.
- In practice, the common approach is to first add special benefits back to the estate, then deduct the contribution share, to arrive at the "deemed estate." This tool automatically calculates in that order.
- An ascendant (parent, etc.) is not an heir if even one child is alive or has a substitute heir. Adding an ascendant row in that situation is automatically excluded from the calculation.
- A contribution share cannot exceed the value of the estate (after adding back special benefits) (Civil Code Art. 904-2(3)). This tool shows a warning if it does, but in practice the contribution amount itself needs to be revisited.
- If a non-heir relative, such as a child's spouse, contributed through nursing care, that falls under the "special contribution payment" (Civil Code Art. 1050) rather than a contribution share. Be careful not to confuse the two.
FAQ
Side Note — When special benefits and a contribution share become an issue at the same time
A special benefit (Civil Code Art. 903) and a contribution share (Civil Code Art. 904-2) are both adjustment systems aimed at achieving fairness in an estate division, but they run in exactly opposite directions. A special benefit is an addition-side adjustment that "reduces the share of someone who already received too much," while a contribution share is a deduction-side adjustment that "increases the share of someone who contributed a lot."
It is not unusual for both to be at issue at the same time in a real inheritance case. For example, an eldest son might have helped run the family business unpaid and contributed to maintaining the estate, while a younger son received a large lifetime gift as funds to buy a home. In this situation, a fair concrete share cannot be worked out unless both the eldest son's contribution share and the younger son's special benefit are reflected.
The common practice is to first add special benefits back to the estate, then deduct the contribution share to arrive at a "deemed estate," calculate each heir's statutory share from that figure, and then subtract each heir's own special benefit and add back their own contribution share. That said, this calculation order is not the only established method, and the factors a Family Court ruling weighs can vary from case to case.
An estate division where both special benefits and a contribution share are involved is also a classic scenario where heirs' claims tend to clash. An integrated simulation like this one is best used as a rough starting point for discussion, not a final answer.