The general age of sexual consent in the Republic of Ireland is 17. A limited defence concerning a consenting 15- or 16-year-old requires, among other things, that the defendant be younger or less than two years older, without the specified authority, intimidation or exploitation. Separate protections continue below 18. Criminal Law (Sexual Offences) Act 2006, sections 3 and 3A.
This guide helps distinguish the ordinary age rule from a defence available in particular proceedings. It also explains why an age gap alone cannot settle a case, and why agreement to contact does not decide the law on images. Northern Ireland is a different jurisdiction: its framework is covered in our United Kingdom guide.
The general rule is 17; the under-15 offence is distinct
Section 3 of the 2006 Act prohibits the defined sexual act with a child below 17. Section 2 separately addresses a child below 15 and carries a different legal framework. These provisions were substituted by sections 16 and 17 of the 2017 Act; reading the original 2006 text without its amendments would miss important changes. 2006 Act, sections 2–3; 2017 Act, sections 16–17.
The 2006 Act uses a defined term, sexual act, with cross-references to the rape and aggravated-sexual-assault provisions of the 1990 Act. It should not be casually treated as the definition of every possible sexual interaction. Other conduct is addressed separately: for example, section 4 of the 2017 Act concerns invitations to sexual touching involving a child below 15, while sections 5 and 6 concern specified sexual activity in a child’s presence or causing a child to watch it, using an under-17 threshold. 2006 Act, section 1; 2017 Act, sections 4–6.
| Age or circumstance | Relevant distinction |
|---|---|
| Below 15 | Section 2 offence; the section 3(8) peer-consent defence does not extend below 15. |
| 15–16 | Section 3 offence, with a limited consent-based defence if all section 3(8) conditions are met. |
| 17, but below 18 | Section 3A regulates sexual acts by a person in authority. |
| Below 18 | Minor-specific image provisions use their own definitions and offences. |
There are also rules affecting individual liability. Section 5 of the 2006 Act states that a female child below 17 is not guilty under that Act by reason only of engaging in sexual intercourse. This is a specific statutory protection, not permission for another person’s conduct or a general exemption for every kind of act. 2006 Act, section 5.
The peer defence requires every condition, including a gap below two years
Section 3(8) concerns proceedings involving a child who had reached 15 but was below 17 when the alleged act occurred. The child must have consented. The defendant must be younger or less than two years older, must not have been a person in authority in relation to the child, and must not have been in an intimidatory or exploitative relationship with the child. These are cumulative conditions. 2017 Act, section 17, inserting section 3(8).
Exactly two years is outside the “less than two years older” limb. Use actual birth dates, rather than rounded ages or school years. For a hypothetical comparison, a difference of one year and eleven months falls within that numerical limit; a difference of exactly two years does not. Neither calculation establishes consent or the absence of authority, intimidation or exploitation.
The defence does not automatically disappear because the older person has turned 18: the statutory condition is the relative age difference, alongside the other requirements. It also does not become available merely because the younger person seemed mature or was believed to be 15. Actual age matters for this particular defence.
In Luke v Director of Public Prosecutions, delivered on 27 March 2026, the High Court rejected the constitutional challenge to the absence of a reasonable-mistake extension to the peer defence. The judgment confirms that the complainant must actually have reached 15. This was a ruling about the legal challenge, not a finding of guilt in the underlying prosecution. [2026] IEHC 182, paragraphs 2, 6 and 91–95.
The HSE’s public guidance describes the general age as 17 and explains the peer defence. Its wording about a gap of “not more than” two years is broader than the statute’s strict limit. For the boundary case, this guide follows the legislation and the court’s formulation. HSE consent guidance; section 3(8).
At 17, current and former authority relationships still matter
Section 3A prohibits a person in authority from engaging in a defined sexual act with a child who is 17 but has not reached 18. The child’s consent is not a defence under section 3A(7). Reaching the ordinary age of consent therefore does not remove this protection. 2006 Act, section 3A.
The statutory definition is broader than a current job title. It includes specified family relationships, current or former guardians, foster parents and step-parents, certain current or former parental partners, people who stand or have stood in a parental role, and people who are or have been responsible for the child’s education, supervision, training, care or welfare. An ended teaching or coaching relationship cannot simply be ignored. 2017 Act, section 15: definition of person in authority.
For a hypothetical case involving a 17-year-old and a former trainer, the relevant question includes whether the person falls within that definition. Describing the teenager as “over the age of consent” does not answer it. Section 3A also contains specific reasonable-mistake and reasonable-belief defences; an individual assessment must read the whole provision rather than assume liability from a label alone.
Age and freely given consent are separate requirements
Section 9 of the Criminal Law (Rape) (Amendment) Act 1990, as substituted in 2017, defines consent through free and voluntary agreement. It lists circumstances inconsistent with consent, including sleep or unconsciousness, relevant incapacity from alcohol or another drug, force or specified fear, and agreement expressed only by someone else. The list is not exhaustive. Consent can be withdrawn, and failure to resist does not by itself amount to consent. 1990 Act, section 9.
Separate reasonable-mistake-as-to-age defences appear in the 2006 Act. The relevant threshold differs between sections 2, 3 and 3A. A belief that a child was 15 is not the same as a belief that the child was 17, and cannot be substituted for the actual minimum age in the peer defence. Older enacted versions also contain proof provisions that have since been invalidated or repealed. Anyone facing proceedings needs advice based on the current provision and case law, not an old screenshot of the Act. 2006 Act, sections 2–3A and annotations; 2024 Act, sections 18–19.
Section 3(7) separately requires the Director of Public Prosecutions to bring or consent to proceedings under that section against a child below 17. That prosecution requirement and the section 3(8) defence perform different functions. Neither is an unconditional promise that no prosecution can occur.
Image law uses an under-18 definition
The Child Trafficking and Pornography Act 1998 defines a child as someone below 18. Its statutory definition of covered material includes specified depictions of explicit activity and sexual-purpose depictions of a child’s genital or anal region, with further categories and qualifications. Section 5 regulates specified production and supply-related conduct; section 6 covers knowing acquisition or possession and knowing access through information and communication technology. 1998 Act, sections 2, 5 and 6.
The text does not establish a general close-age or private-sexting exception equivalent to section 3(8). It contains specific official-function and bona fide research provisions, which are not a general permission for private sharing. Consent to contact at 17 does not settle whether an image may be made, retained or distributed. Assess the material and conduct separately; do not circulate intimate images when seeking help.
Online exploitation is also regulated separately. Section 7 of the 2017 Act covers specified meeting, travel or meeting-arrangement conduct after at least one previous communication, for sexual exploitation of a child below 17. Section 8 addresses communications intended to facilitate exploitation and sending sexually explicit material to a child below 17. The absence of an actual meeting does not settle every online offence. 2017 Act, sections 7–8.
A foreign location is not necessarily outside Irish criminal jurisdiction. Section 42 of the 2017 Act extends specified offences involving children to conduct abroad by Irish citizens or people ordinarily resident in the State, with its own conditions. Obtain advice on both jurisdictions rather than treating a trip as permission. 2017 Act, section 42.
Commencement dates and revision dates answer different questions
The relevant 2017 age amendments, image amendments and consent provision commenced on 27 March 2017. The 2024 changes discussed above commenced on 31 August 2024; section 19 provides a specified retrospective application of certain repeals, with an exception for cases already finally decided. Historical conduct therefore requires attention to the exact provision, date and procedural position. S.I. 112/2017; S.I. 391/2024; 2024 Act, section 19.
The Law Reform Commission consolidations inspected carry earlier revision dates: 31 August 2024 for the 2006 and 2017 Acts, 21 May 2020 for the 1998 Act and 15 February 2022 for the 1990 Act. They were cross-checked against the live Irish Statute Book amendment tables, labelled updated to 21 October 2026, and the March 2026 judgment. A recent access date should not be confused with a fresh consolidation date. 2006 Act amendments; 2017 Act amendments; 1998 Act amendments; 1990 Act amendments.
Practical questions
Does the two-year defence include exactly two years?
No. The statutory limb says less than two years older. The child concerned must also actually be 15 or 16, consent must be present, and the authority and relationship conditions must be satisfied.
Can the same defence be used for a child below 15?
No. The section 3(8) consent-based defence does not extend to a child below 15. A reasonable-mistake defence is a separate question with its own statutory threshold.
What facts should a lawyer be given?
Exact birth dates, the date and jurisdiction, the nature of the alleged act, communications about agreement or pressure, any current or former care or training relationship, and whether images were involved. Describe images without forwarding them.
Continue with our Law & Rights library and separate guides to the United Kingdom and Portugal. Each jurisdiction’s exceptions need independent analysis.
Official sources and verification
- Law Reform Commission: Criminal Law (Sexual Offences) Act 2006. Sections 1–3A and 5, with annotations.
- Criminal Law (Sexual Offences) Act 2017 and administrative consolidation. Relevant amendments, online offences and jurisdiction.
- Child Trafficking and Pornography Act 1998 and Criminal Law (Rape) (Amendment) Act 1990.
- Criminal Law (Sexual Offences and Human Trafficking) Act 2024, sections 18–19; commencement orders linked above.
- Luke v DPP [2026] IEHC 182, official judgment dated 27 March 2026. Read for the scope of the peer defence, without identifying the protected parties.
- HSE: sexual consent. Read as public guidance, with the statutory age-gap wording taking priority where the wording differs.