Military service age and obligation United Kingdom, in 21 editions.

16 years of age for voluntary military service (January 2004) service; women serve in military services, but are excluded from ground combat positions and some naval postings (2004)

16 16-33 years of age (officers 17-28) for voluntary military service; service (with parental consent under 18); women serve in military services, but are excluded from ground combat positions and some naval postings (2004) postings; must be citizen of the UK, Commonwealth, or Republic of Ireland; reservists serve a minimum of 3 years, to age 45 or 55 (2007)

16-33 years of age (officers 17-28) for voluntary military service (with parental consent under 18); women serve in military services, but are excluded from ground combat positions and some naval postings; must be citizen of the UK, Commonwealth, or Republic of Ireland; reservists serve a minimum of 3 years, to age 45 or 55 (2007) 55; 16 years of age for voluntary military service by Nepalese citizens in the Brigade of the Gurkhas; 16-34 years of age for voluntary military service by Papua New Guinean citizens (2008)

16-33 years of age (officers 17-28) for voluntary military service (with parental consent under 18); women serve in military services, but are excluded from ground combat positions and some naval postings; as of October 2009, women comprised 12.1% of officers and 9% of enlisted personnel in the regular forces; must be citizen of the UK, Commonwealth, or Republic of Ireland; reservists serve a minimum of 3 years, to age 45 or 55; 16 years of age for voluntary military service by Nepalese citizens in the Brigade of the Gurkhas; 16-34 years of age for voluntary military service by Papua New Guinean citizens (2008) (2009)

16-33 years of age (officers 17-28) for voluntary military service (with parental consent under 18); no conscription; women serve in military services, but are excluded from ground combat positions and some naval postings; as of October 2009, women comprised 12.1% of officers and 9% of enlisted personnel in the regular forces; must be citizen of the UK, Commonwealth, or Republic of Ireland; reservists serve a minimum of 3 years, to age 45 or 55; 16 17 years 6 months of age for voluntary military service by Nepalese citizens in the Brigade of Gurkhas; 16-34 years of age for voluntary military service by Papua New Guinean citizens (2009) (2012)

16-33 years of age (officers 17-28) for voluntary military service (with parental consent under 18); no conscription; women serve in military services, but are excluded from ground combat positions and some naval postings; as of October 2009, women comprised 12.1% of officers and 9% of enlisted personnel in the regular forces; must be citizen of the UK, Commonwealth, or Republic of Ireland; reservists serve a minimum of 3 years, to age 45 or 55; 17 years 6 months of age for voluntary military service by Nepalese citizens in the Brigade of Gurkhas; 16-34 years of age for voluntary military service by Papua New Guinean citizens (2012)

16-33 years of age (officers 17-28) for voluntary military service (with parental consent under 18); no conscription; women serve in military services, but are excluded from services including some ground combat positions and some naval postings; roles; the UK’s Defense Ministry is expected to further ease existing women's restrictions by the end of 2016; must be citizen of the UK, Commonwealth, or Republic of Ireland; reservists serve a minimum of 3 years, to age 45 or 55; 17 years 6 months of age for voluntary military service by Nepalese citizens in the Brigade of Gurkhas; 16-34 years of age for voluntary military service by Papua New Guinean citizens (2012) (2016)

16-33 years of age (officers 17-28) for voluntary military service (with parental consent under 18); no conscription; women serve in military services including some ground combat roles; the UK’s Defense Ministry is expected to further ease existing women's restrictions by the end of 2016; must be citizen of the UK, Commonwealth, or Republic of Ireland; reservists serve a minimum of 3 years, to age 45 or 55; 17 years 6 months of age for voluntary military service by Nepalese citizens in the Brigade of Gurkhas; 16-34 years of age for voluntary military service by Papua New Guinean citizens (2016)

Slight slight variations by service, but generally 16-36 years of age for enlisted (with parental consent under 18) and 18-29 for officers; minimum length of service 4 years; women serve in military services including ground combat roles (2019)

slight variations by service, but generally 16-36 years of age for enlisted (with parental consent under 18) and 18-29 for officers; minimum length of service 4 years; women serve in military services including ground combat roles (2019) roles; conscription abolished in 1963 (2021)

some variations by service, but generally 16-36 years of age for enlisted (with parental consent under 18) and 18-29 for officers; minimum length of service 4 years; women serve in all military services including combat roles; conscription abolished in 1963 (2022) (2023)
note 1: as of 2019, women made up about over 11% of the military's full-time personnel in 2023
note 2: the British military allows Commonwealth nationals who are current UK residents and have been in the country for at least 5 years to apply; it also accepts Irish citizens
note 3: the British Army has continued the historic practice of recruiting Gurkhas from Nepal to serve in the Brigade of Gurkhas; the British began to recruit Nepalese citizens (Gurkhas) into the East India Company Army during the Anglo-Nepalese War (1814-1816); the Gurkhas subsequently were brought into the British Indian Army and by 1914, there were 10 Gurkha regiments, collectively known as the Gurkha Brigade; following the partition of India in 1947, an agreement between Nepal, India, and Great Britain allowed for the transfer of the 10 regiments from the British Indian Army to the separate British and Indian armies; four of the regiments were transferred to the British Army, where they have since served continuously as the Brigade of Gurkhas

some variations by service, but generally 16-36 years of age for enlisted (with parental consent under 18) and 18-29 for officers; minimum length of service 4 years; women serve in all military services including combat roles; conscription abolished in 1963 (2023) (2024)
note 1: women made up over 11% 11.7% of the military's full-time personnel in 2023 2024
note 2: the British military allows Commonwealth nationals who are current UK residents and have been in the country for at least 5 years to apply; it also accepts Irish citizens
note 3: the British Army has continued the historic practice of recruiting Gurkhas from Nepal to serve in the Brigade of Gurkhas; the British began to recruit Nepalese citizens (Gurkhas) into the East India Company Army during the Anglo-Nepalese War (1814-1816); the Gurkhas subsequently were brought into the British Indian Army and by 1914, there were 10 Gurkha regiments, collectively known as the Gurkha Brigade; following the partition of India in 1947, an agreement between Nepal, India, and Great Britain allowed for the transfer of the 10 regiments from the British Indian Army to the separate British and Indian armies; four of the regiments were transferred to the British Army, where they have since served continuously as the Brigade of Gurkhas

some variations by service, but generally 16-36 16 years of age for enlisted ranks (with parental consent for under 18) and 18-29 18 years of age for officers; minimum length of service 4 years; women serve in all maximum age varies by military services including combat roles; service; conscription abolished in 1963 (2024) (2026)
note 1: women serve in all branches and made up 11.7% nearly 12% of the military's full-time personnel in 2024 2025
note 2: the British military allows Commonwealth nationals who are current UK residents and have been in the country for at least 5 years to apply; it also accepts Irish citizens
note 3: the British Army has continued the historic practice of recruiting Gurkhas from Nepal to serve in the Brigade of Gurkhas; the British began to recruit Nepalese citizens (Gurkhas) into the East India Company Army during the Anglo-Nepalese War (1814-1816); the Gurkhas subsequently were brought into the British Indian Army and by 1914, there were 10 Gurkha regiments, collectively known as the Gurkha Brigade; following the partition of India in 1947, an agreement between Nepal, India, and Great Britain allowed for the transfer of the 10 regiments from the British Indian Army to the separate British and Indian armies; four of the regiments were transferred to the British Army, where they have since served continuously as the Brigade of Gurkhas