Italian Citizenship by Marriage vs Descent: A Complete Comparison

Italian law provides two distinct routes to citizenship that are frequently confused or conflated: citizenship by descent (iure sanguinis) and citizenship by marriage (iure matrimonii). While both result in Italian citizenship, they are legally and procedurally very different — and understanding those differences is essential for anyone trying to determine which route applies to their situation, or whether both might be available.

This article provides a systematic comparison of the two methods across all the key dimensions: legal nature, eligibility, documents, timelines, revocability and practical implications. For detailed guidance on each method individually, see our dedicated articles on Italian citizenship by descent eligibility requirements and Italian citizenship by marriage.

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1. Legal Nature: Right vs Concession

The most fundamental difference between the two methods is their legal nature under Italian law.

Citizenship by descent is a declaratory recognition of a right that has always existed. The applicant is not asking the Italian state to grant them citizenship — they are asking it to recognise that they have already been an Italian citizen since birth. The Italian state has no discretion to refuse recognition if the eligibility conditions are met. Once recognised, citizenship by descent is deemed to have existed retroactively from the date of birth — not from the date of the recognition decree.

Citizenship by marriage, by contrast, is a constitutive act — it creates a new legal status from the date of the formal grant. The Italian administration has a degree of discretion in assessing applications, and an application that meets all formal requirements can still be refused on grounds of national security or where the administration determines that the grant is not in the public interest. Citizenship by marriage comes into existence from the date of the oath of allegiance, not retroactively.

This difference has significant practical implications, including for the revocability of citizenship (discussed below) and for the transmission of citizenship to children born before recognition.

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2. Eligibility: Who Qualifies for Each Method

Citizenship by descent is available to any person who can demonstrate an unbroken line of descent from an Italian citizen ancestor, regardless of how many generations have passed. There is no generational limit. The key conditions are that at each generation, the Italian ancestor was still an Italian citizen at the time their child was born — meaning they had not yet acquired a foreign citizenship or formally renounced Italian citizenship. No connection to Italy beyond the ancestral line is required — the applicant does not need to have ever lived in or visited Italy.

Citizenship by marriage is available only to a person who is legally married to — or in a civil union with — an Italian citizen, and only after the qualifying waiting period has elapsed. There is no ancestral requirement. The applicant must be currently in a subsisting, valid marital or civil union with an Italian citizen, must meet the Italian language requirement, and must have no disqualifying criminal convictions.

In some situations, a person may be eligible for both methods — for example, someone who has Italian ancestry and is also married to an Italian citizen. In these cases, citizenship by descent is generally the more advantageous route (see the comparison of legal nature and revocability below).

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3. Language Requirement

Citizenship by descent: no Italian language requirement. The application is purely documentary and does not require the applicant to speak, read or write Italian at any level.

Citizenship by marriage: mandatory Italian language certification at a minimum level of B1 on the Common European Framework of Reference, as required by Law No. 132 of 2018. The certificate must be issued by a recognised certifying body. The only exemption is for holders of an EU long-term residence permit, who are exempt from this requirement.

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4. Where to Submit the Application

Citizenship by descent can be submitted through three routes depending on the circumstances: through the Italian consulate responsible for the applicant’s place of residence abroad; directly through an Italian municipal civil registry office after establishing legal residence in Italy; or through judicial proceedings before an Italian court (mandatory for 1948 rule cases and available in other specific circumstances). For a full explanation of each route, see our article on how the Italian citizenship recognition process works.

Citizenship by marriage must be applied for exclusively through the online portal of the Italian Ministry of the Interior. Applicants residing in Italy use SPID (Italy’s digital identity system) to access the portal. Applicants residing abroad can register directly on the ministry website. There is no municipal or judicial route for citizenship by marriage.

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5. Required Documents

Citizenship by descent requires a comprehensive documentary file covering every person in the line of descent from the Italian ancestor to the applicant: birth, marriage and death certificates for each generation, a certificate of non-naturalisation for the ancestor, and — where applicable — a baptism certificate if civil records pre-date 1871. All foreign documents must be apostilled or legalised and accompanied by sworn Italian translations. For the complete document list, see our article on documents required for Italian citizenship by descent.

Citizenship by marriage requires a significantly smaller set of documents: a valid identity document, the applicant’s birth certificate (apostilled and translated), a criminal record certificate (valid for six months), an Italian language certificate (B1 or above), the marriage certificate registered in Italy, and proof of payment of the €250 administrative contribution. The documentation burden is considerably lower than for citizenship by descent.

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6. Processing Times

Citizenship by descent timelines vary significantly by route:

• Through an Italian municipality: typically 6 to 18 months from the time residence is established
• Through the consular route: anywhere from a few months (in low-demand consulates) to ten years or more (in high-demand consulates in South America)
• Through judicial proceedings: generally 12 to 24 months from filing

Citizenship by marriage has a statutory deadline of 24 months from submission of the application, with a possible extension to 36 months for proven objective reasons. This applies to all applications submitted after 20 December 2020. Applications submitted before that date may be subject to the previous 48-month period.

In terms of practical comparison, citizenship by marriage through the Ministry portal may be faster than citizenship by descent through a high-demand consulate — but is generally slower than the municipal route or judicial proceedings for descent.

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7. Administrative Contribution

Citizenship by descent: no administrative contribution is required. The recognition of citizenship by descent is free of charge.

Citizenship by marriage: a mandatory administrative contribution of €250 must be paid to the Italian Ministry of the Interior before the application can be submitted. This contribution is partially refundable if the application is refused, provided the refund is requested within one year of payment.

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8. Revocability

This is one of the most important practical differences between the two methods.

Citizenship by descent cannot be revoked. Once recognised, it is a permanent legal status. No subsequent event — including criminal convictions, change of residence or any other circumstance — can cause citizenship by descent to be lost or revoked.

Citizenship by marriage can be revoked. Under Article 10-bis of Law No. 91 of 1992, citizenship acquired after birth — including citizenship by marriage — can be revoked following a final conviction for certain serious offences, including terrorism-related crimes. This is a significant legal difference for applicants who are eligible for both methods and are choosing between them.

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9. Effect on Children

Citizenship by descent: because it is retroactive, the recognition of citizenship by descent means that the applicant is deemed to have been an Italian citizen since birth. Children born to the applicant before the recognition may therefore have their own independent right to recognition of Italian citizenship through the parent — which must be assessed and pursued individually. Children born after recognition acquire Italian citizenship automatically at birth.

Citizenship by marriage: because it is constitutive and non-retroactive, it takes effect from the date of the oath of allegiance. Children born to the applicant before the oath was taken are not affected by the parent’s citizenship by marriage in terms of their own citizenship status. Children born after the oath acquire Italian citizenship automatically through the now-Italian parent.

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10. What Happens if the Marriage Ends

Citizenship by descent: not applicable — citizenship by descent has no connection to any marital status. It cannot be affected by marriage, separation, divorce or widowhood.

Citizenship by marriage: the application lapses if the marriage is dissolved, annulled or legally separated before the citizenship grant decree is issued and before the oath of allegiance is taken. Once citizenship by marriage has been formally granted and the oath has been taken, a subsequent divorce does not cause the loss of citizenship — the person remains an Italian citizen regardless of the later dissolution of the marriage.

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Summary Comparison Table

Aspect	By Descent	By Marriage
Legal nature	Declaratory (right recognised retroactively)	Constitutive (new status from date of oath)
Ancestry required	Yes — unbroken line from Italian ancestor	No
Marriage to Italian required	No	Yes — subsisting until oath
Language requirement	None	Italian B1 mandatory
Administrative contribution	None	€250
Processing time	6 months – 10+ years (route-dependent)	Up to 24–36 months
Revocable	No	Yes (serious offences)
Retroactive effect	Yes — from birth	No — from oath date
Effect on children born before	May have independent right to recognition	No effect on their citizenship
Lost if marriage ends	Not applicable	No (if already granted and oath taken)

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Which Route Should You Choose

If you are eligible for both citizenship by descent and citizenship by marriage, citizenship by descent is generally the more advantageous route for the following reasons:

• It is irrevocable once recognised
• It is retroactive — you are deemed to have been Italian since birth
• It does not require an Italian language certificate
• It has no administrative cost
• It may allow children born before recognition to have their own right to citizenship assessed

Citizenship by marriage is the appropriate route when there is no Italian ancestry — or when the line of descent has been interrupted and citizenship by descent is not available. For guidance on which route applies to your specific situation, contact our Italian citizenship lawyer for an initial legal assessment.

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Frequently Asked Questions

Can I apply for both methods at the same time?

There is no legal prohibition on exploring both routes simultaneously, but in practice it rarely makes sense to pursue both at the same time given the different procedural requirements. A preliminary legal assessment of your eligibility for citizenship by descent should be the first step — if that route is available, it is generally preferable to citizenship by marriage for the reasons set out above.

I was married to an Italian citizen before April 1983 — do I already have Italian citizenship?

Possibly. Under the pre-1983 rules, a foreign woman who married an Italian citizen before 27 April 1983 automatically acquired Italian citizenship upon marriage, provided the marriage was still in force on that date. A subsequent divorce does not cause the loss of citizenship that was automatically acquired under the old rules. If this applies to your situation, a formal verification of your status — rather than a new application — is the appropriate first step.

Does citizenship by descent affect my existing citizenship in another country?

Italian law fully permits dual or multiple citizenship. Obtaining recognition of Italian citizenship by descent does not automatically cause the loss of your existing citizenship. However, your existing country’s laws may not permit dual citizenship, and acquiring Italian citizenship could result in the loss of your other citizenship under that country’s rules. This must be verified case by case based on the laws of the other country involved.

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Request an Initial Legal Assessment

If you are uncertain whether citizenship by descent or citizenship by marriage is available or more appropriate in your specific situation, contact our Italian citizenship lawyer to request an initial legal assessment. We will review your circumstances and advise on the most appropriate route under Italian law.