Forced Heirship Explained: Reserved Shares, Cross-Border Estates and How to Plan

Key takeaways

Forced heirship means the law reserves part of your estate for certain relatives, usually children and sometimes a spouse, whatever your will says.

It is common in civil‑law countries (much of continental Europe and Latin America) and in systems applying Islamic inheritance rules. Most common‑law systems instead allow freedom of testation, with court remedies for dependants.

The rules can catch people who retire abroad or buy property in another country, and can override a will that leaves everything to a spouse or a second family.

Which country's rules apply depends on factors such as habitual residence, domicile, nationality and where property is located. In most EU countries you may choose the law of your nationality.

Planning tools exist, but they differ by country and some can backfire. Take advice from lawyers in each relevant country before you act.

Shares, rules and tax treatment change. Check the current law in each country rather than relying on summaries.

Many people assume they can leave their property to whomever they like. In much of the world, that is not true. A large share of the world's legal systems reserve part of a person's estate for close family, no matter what the will says. This is called forced heirship, and it is one of the most common sources of surprise, and family conflict, for people with lives spread across countries.

This guide explains what forced heirship is, why it exists, where it typically applies, how it interacts with moving abroad and owning property in other countries, and the main planning approaches. It builds on our broader guide, Wills and Estates Across Borders.

What forced heirship means

Under forced heirship, the law divides an estate into two parts:

The reserved portion (sometimes called the reserve, legitime, or compulsory share), which must go to protected heirs.
The freely disposable portion, which you may leave to anyone, including the protected heirs, a partner, friends or charity.

Who is protected, and how large the reserved portion is, depend on the country and on your family. Commonly protected heirs include children (and the descendants of a child who has died), a surviving spouse, and in some systems parents. The reserved share often grows with the number of children.

In some systems the protected heirs receive an actual share of the assets. In others they have a monetary claim against the estate for the value of their share. The difference matters to how property is held and sold.

Why it exists

Forced heirship has deep roots, in Roman law, in customary law and in religious law. Its purposes include:

Protecting family members from disinheritance.
Keeping wealth within families across generations.
Promoting fairness between children, particularly in systems where equal treatment of children is a core value.

Freedom of testation, by contrast, reflects a tradition that treats property as the owner's to dispose of, balanced by court powers to protect dependants who are left without reasonable provision.

Neither approach is better. They reflect different values. Problems arise when a person's life touches both.

Where forced heirship typically applies

Civil‑law Europe

Most continental European legal systems contain some form of reserved share. For example:

France reserves part of the estate for children through the réserve héréditaire, with additional protection for a surviving spouse in some circumstances.
Spain has the legítima, with significant regional variation; several regions with their own civil law, such as Catalonia and Navarre, apply different rules.
Italy reserves shares for children and the surviving spouse.
Germany gives close relatives who are excluded by a will a Pflichtteil, a compulsory share taking the form of a monetary claim against the heirs.
Greece, Portugal, Belgium and others have their own versions.

The European e‑Justice portal provides country‑by‑country information on inheritance law in EU member states (European e‑Justice, Inheritance).

Latin America

Many Latin American systems, influenced by Spanish, Portuguese and French law, also reserve shares for children and spouses, though the details vary country by country.

Islamic inheritance rules

In countries that apply Islamic inheritance rules, fixed shares are assigned to specified relatives, and only a limited part of the estate can be freely bequeathed. In some countries these rules apply to all citizens, in others only to Muslims, and some allow non‑Muslim foreigners to apply the law of their nationality. Local advice is essential.

Mixed systems

Scotland has "legal rights" that allow a spouse or civil partner and children to claim a share of the movable estate (broadly, assets other than land and buildings), regardless of the will.
Louisiana, with its civil‑law heritage, retains a narrow form of forced heirship.
South Africa and other mixed jurisdictions have their own rules on maintenance claims.

Common‑law systems

England and Wales, most of the United States, Canada (outside Quebec's civil‑law tradition, which has its own family rules) and Australia generally allow freedom of testation. However, courts can often order provision for a spouse, child or dependant who has been left without reasonable financial support. In England and Wales, for example, this is done under family provision legislation. So "freedom" is not absolute even here.

How forced heirship meets cross‑border lives

Which law applies?

When an estate touches more than one country, each country's private international law decides which succession law governs. Connecting factors include:

Habitual residence at death (common in civil‑law systems and under the EU Succession Regulation).
Domicile (common in common‑law systems).
Nationality (used by some countries, and available as a choice in others).
Location of immovable property (land and buildings), which some countries always govern by their own law.

This can produce several outcomes:

One law governs your whole estate (unity).
Different laws govern different assets, for example, movables by the law of domicile and land by the law of where it lies (scission).
Countries disagree, and each applies its own rules to the assets it controls.

The EU Succession Regulation

For deaths in most EU member states, Regulation (EU) No 650/2012 (often called "Brussels IV") applies a single law to the whole estate: by default, the law of the country where the person was habitually resident at death. A person may instead choose, in their will, the law of a country of which they are a national. The e‑Justice portal explains how this works and the European Certificate of Succession used to prove heirs' rights across borders (European e‑Justice).

Consequences for retirees:

Moving into a forced heirship country may make its rules apply to your whole estate by default.
A choice of the law of your nationality may let a British, American or Australian national, for example, apply a freedom‑of‑testation law instead, subject to how other countries treat that choice.
Not every EU member state applies the Regulation, and non‑EU countries are not bound by it, so assets elsewhere may be treated differently.
Public policy exceptions may allow a court to refuse a foreign law in limited circumstances; whether forced heirship protections can be overridden this way is a technical question for lawyers.

Property abroad

If you own a home in a forced heirship country, its law may affect that home even if you live elsewhere, depending on that country's rules and any choice of law. Equally, if you live in a forced heirship country, its law may reach property you own in your home country.

Real‑world situations where forced heirship surprises people

The following are illustrative scenarios, not legal outcomes, which always depend on the specific laws and facts.

The couple who leave everything to each other. In freedom‑of‑testation systems, mirror wills leaving everything to the survivor are common. If forced heirship applies, children may be entitled to a share on the first death, which might mean the surviving spouse shares ownership of the home with the children.
The blended family. Someone with children from a first marriage and a second spouse may find that forced heirship protects the children in ways that limit what the second spouse receives, or the reverse.
The estranged child. A parent who wishes to leave nothing to a child they have not seen for decades may find this impossible under forced heirship.
The charitable gift. A plan to leave most of an estate to charity may exceed the freely disposable portion.
Lifetime gifts. Some systems "claw back" substantial gifts made during life when calculating reserved shares, so giving property away before death does not necessarily avoid the rules.

Planning approaches

Every tool below depends on the countries involved. Some are effective in one country and ineffective or harmful in another. Use them only with advice from lawyers qualified in each relevant jurisdiction.

1. Choice of law

Where permitted, choosing the law of your nationality in your will can be the simplest tool. Check that the choice will be recognised in every country where you have assets, and that it does not create unwanted tax effects.

2. Deciding where to live

Your habitual residence or domicile may determine the governing law. People rarely choose a country for its succession law alone, but it is worth understanding how a move changes your position. See How to Choose Where to Retire and How to Retire Abroad.

3. Matrimonial property arrangements

In many civil‑law countries, the matrimonial property regime is settled before succession. Changing the regime, for example adopting a community property regime with a clause giving the whole community to the survivor, may protect a spouse in some systems. These arrangements are highly country‑specific.

4. How property is owned

The form of ownership, such as joint ownership with survivorship (where recognised), ownership through a company, or splitting usufruct (the right to use and enjoy) from bare ownership, can change how forced heirship applies. Some structures carry tax or practical costs that outweigh their benefits.

5. Life insurance and pensions

In some countries, life insurance proceeds and certain pension benefits pass outside the estate and may be treated differently for forced heirship purposes, though some systems can still take excessive premiums into account. Review beneficiary nominations as part of your plan.

6. Agreements with heirs

Some systems allow heirs to renounce or agree to defer their rights, during the parent's lifetime or after death. Rules on when and how renunciation is valid vary widely.

7. Trusts

Trusts are well established in common‑law countries but may not be recognised, or may be treated unpredictably, in civil‑law countries. Some forced heirship countries allow claims against assets placed in trust. Proceed only with specialist advice.

Tax is a separate question

Forced heirship decides who inherits; inheritance or estate tax decides how much the state takes. The two are governed separately, and a choice of succession law usually does not change which country taxes the estate. US citizens should note that the United States taxes the worldwide estates of its citizens wherever they live (IRS). Plan succession and tax together, with advisers who coordinate.

Will formalities

Even when the governing law is clear, your will must be validly made. The Hague Convention on the form of testamentary dispositions treats a will as formally valid if it meets the requirements of one of several connected laws (HCCH, Hague Wills Convention). Formal validity does not override forced heirship; it only means the document is properly executed.

A forced heirship checklist

List your nationalities, current and past residences, and where you might live later.
List your assets by country, distinguishing land and buildings from other assets.
List your family: spouse or partner, children from all relationships, and others you wish to provide for.
Ask a lawyer in each relevant country: Which law will govern my estate? Does forced heirship apply? To which assets? What shares would my heirs claim?
Ask whether you can choose a law, and whether that choice would be recognised everywhere you have assets.
Consider your matrimonial property regime and how property is titled.
Review lifetime gifts, life insurance and pension nominations.
Coordinate with tax advice in each country.
Put your plan in writing in properly coordinated wills; see Wills and Estates Across Borders.
Explain your plan to your family where appropriate, to reduce surprise and conflict.
Review after any move, purchase, marriage, divorce, birth or death.

Talking to your family

Forced heirship rules can feel at odds with a parent's wishes, and children's legal rights can create tension. Open conversations, early and calmly, can help. Explaining your reasoning, perhaps in a letter of wishes, and discussing how the family home will be handled, can prevent disputes. Some families find these conversations become meaningful moments of shared values. Our guide to finding purpose after retirement touches on legacy as a source of meaning, and Loneliness and Connection After Retirement on keeping family close.

Frequently asked questions

What is forced heirship in simple terms?

A legal rule that reserves part of a person's estate for certain relatives, usually children and sometimes a spouse, so that a will cannot leave everything to someone else.

Which countries have forced heirship?

Many civil‑law countries in continental Europe and Latin America, and countries applying Islamic inheritance rules, have some form of it. Scotland has legal rights over movable property. Most common‑law systems instead allow freedom of testation with court remedies for dependants.

Can I avoid forced heirship by making a will?

Not by a will alone, if forced heirship applies to your estate. In some cases, a valid choice of the law of your nationality can lead to a different law governing your succession. Advice in each relevant country is essential.

Does forced heirship apply to foreigners who own property?

It can, depending on the country's rules, your residence, nationality and any choice of law. Property in a forced heirship country is a common source of complications.

Does the EU Succession Regulation let me avoid forced heirship?

It allows you to choose the law of your nationality instead of your habitual residence. If that law has no forced heirship, the reserved shares of your residence country may not apply, subject to the Regulation's scope and how other countries treat the choice.

Do lifetime gifts avoid forced heirship?

Not reliably. Many systems take significant lifetime gifts into account when calculating reserved shares.

Does forced heirship affect inheritance tax?

They are separate. Succession law decides who inherits; tax law decides who pays what. Plan both together.

Keep exploring onwora

Legacy: Wills and Estates Across Borders
Place: How to Choose Where to Retire · How to Retire Abroad
Money: Retirement Drawdown · The 4% Rule Explained
Health: Healthcare When You Retire Abroad · International Health Insurance Explained
Purpose: How to Find Purpose After Retirement · Loneliness and Connection After Retirement

This guide is general information, not legal or tax advice. Succession and tax laws differ by country and change over time; consult qualified lawyers and tax advisers in each relevant country.