Inheritance Split Calculator

Dividing an estate among multiple heirs is one of the most consequential financial decisions a family faces. Whether the split is dictated by a will, governed by intestacy laws, or agreed upon by family consensus, understanding exactly how much each heir receives helps prevent misunderstandings and disputes. This calculator lets you model both equal and custom splits so that every party can see the numbers clearly before finalisation.

Equal vs. Custom Split

An equal split divides the estate into identical shares for every heir. If four heirs share an estate of $400,000, each receives $100,000—25% of the total. Equal splits are common when there is no will specifying otherwise, when heirs are all children of the deceased, or when the family agrees that equal treatment is fairest.

A custom split lets you assign a specific percentage to each heir. This reflects situations where a will explicitly allocates different proportions, where one heir has already received a lifetime gift (an advancement), where one heir has provided caregiving, or where there is a surviving spouse who receives a larger statutory share. Percentages do not need to sum to 100%; any unallocated remainder is shown separately and stays within the estate.

How Intestacy Laws Affect the Split

When a person dies without a valid will—known as dying intestate—the distribution of their estate is determined by the intestacy laws of the jurisdiction where they lived. These laws typically prioritize a surviving spouse, then children, then other relatives such as parents, siblings, and more distant family. The exact fractions vary considerably by country and, in the United States, by state.

In many common-law jurisdictions, a surviving spouse may receive one-half to one-third of the estate, with the remainder divided equally among children. In community-property states, the split between a surviving spouse and children may be determined by whether assets were separately owned or jointly acquired during the marriage. This calculator does not apply any jurisdiction's legal rules automatically—it simply computes the arithmetic of whatever percentages you enter.

Probate and the Role of an Executor

Before heirs receive their shares, most estates pass through a legal process called probate. The executor—named in the will or appointed by a court—inventories the estate's assets, pays outstanding debts and taxes, and then distributes what remains to the heirs according to the will or intestacy rules. Only the net estate (gross assets minus debts and estate-settlement costs) is available for distribution.

Estate and inheritance taxes further reduce what heirs actually receive. Estate tax is levied on the value of the estate before distribution; inheritance tax, where it exists, is levied on each heir's share individually. Tax rates and exemptions differ by country and, in the US, by state. This calculator works with a pre-tax gross estate value; consult a tax professional for after-tax estimates.

Liquid vs. Illiquid Assets

A major practical challenge in estate splits is that most estates contain illiquid assets—real property, business interests, vehicles, art, and personal belongings—alongside liquid assets like cash and securities. When heirs receive different types of assets, a professional appraisal is needed to ensure that the values are fairly allocated according to each heir's percentage share.

Common approaches include: selling all assets and distributing cash proportionally; letting one heir buy out the others at appraised value; or assigning specific assets to specific heirs while equalising values with cash side-payments. This calculator focuses on the monetary division and does not distinguish asset types. The percentages and dollar amounts it produces can serve as a starting point for negotiating how specific assets are assigned.

Updating the Split Over Time

Estate values fluctuate. Investment portfolios rise and fall, property values change, and debts are repaid or incur additional interest between the date of death and the date of final distribution. If the estate takes many months to settle, it is important to recalculate shares based on the estate's value at the point of actual distribution rather than at death.

Similarly, if a partial distribution is made to heirs while the estate is still being settled, the remaining shares must be recalculated relative to the remaining assets. This calculator makes it straightforward to model multiple scenarios or updated values as the estate settlement progresses.

Using This Calculator

Enter the total estate value—the net amount available for distribution after debts, taxes, and executor fees have been settled. Select equal split to divide the estate automatically, or custom split to enter a percentage for each heir. Add as many heirs as needed and optionally name each one for clarity. The results panel shows each heir's allocated amount, their percentage share, and—in custom mode—any unallocated remainder. These figures are estimates based solely on the inputs you provide and do not constitute legal or tax advice.