People flee Iran primarily due to severe state persecution, systematic human rights violations, and an oppressive government regime that restricts fundamental freedoms. Asylum seekers from Iran include political dissidents, religious minorities, women's rights activists, LGBTQ+ individuals, and ethnic minorities who face imprisonment, torture, and execution. The UK has consistently recognized Iran as producing genuine refugees, with Iranian nationals regularly among the top nationalities granted asylum in Britain.

Iran operates under an authoritarian theocratic regime where dissent is brutally suppressed through arbitrary detention, unfair trials, and widespread use of the death penalty. The country executes more people per capita than almost any other nation, with hundreds executed annually including for political offenses and charges such as "enmity against God." Security forces routinely use excessive force against protesters, as seen in the 2022-2023 nationwide protests following Mahsa Amini's death in custody, where over 500 protesters were killed and thousands arrested. Torture in detention facilities is systematic and well-documented, with confessions extracted under duress regularly used in court proceedings. Women face institutionalized discrimination through compulsory hijab laws, restrictions on employment and travel, and legal frameworks that treat them as second-class citizens. The economy has been devastated by international sanctions and mismanagement, leading to high unemployment, inflation exceeding 40 percent, and widespread poverty that particularly affects young people and minorities.

Political persecution is pervasive, with activists, journalists, lawyers, and human rights defenders facing arrest, lengthy prison sentences, and execution for peacefully exercising their rights to freedom of expression and association. Religious minorities including Baha'is, Christian converts, Sunni Muslims, and dissenting Shia clerics face systematic discrimination, denial of education and employment, property confiscation, and imprisonment for practicing their faith—Baha'is are particularly targeted as they are denied legal recognition entirely. Ethnic minorities including Ahwazi Arabs, Kurds, Baluchis, and Azeris experience discrimination, cultural suppression, and disproportionate application of the death penalty, with Kurdish and Baluchi regions subjected to military operations and extra-judicial killings. LGBTQ+ individuals face criminalization with same-sex relations punishable by death, forcing many to live in hiding or flee the country, while transgender individuals face pressure to undergo gender reassignment surgery as the only "acceptable" form of existence. Women and girls who defy mandatory hijab laws, participate in protests, or challenge patriarchal restrictions face arrest, assault by morality police, and imprisonment, with female activists receiving particularly harsh sentences. Converts from Islam to other religions face apostasy charges carrying the death penalty, making religious conversion extremely dangerous.

Iran faces severe water scarcity with decades of mismanagement, over-extraction of groundwater, and climate change causing rivers and lakes including Lake Urmia to dry up dramatically, devastating agriculture and livelihoods. Prolonged droughts have intensified across the country, particularly affecting rural communities dependent on farming and causing widespread crop failures, livestock deaths, and rural-to-urban migration that strains already limited resources. Dust storms originating from dried lake beds and desertification have increased in frequency and intensity, causing respiratory problems and making some areas nearly uninhabitable. Water protests have erupted in provinces including Khuzestan and Isfahan, where rivers have been diverted or dried up, and these demonstrations have been met with violent crackdowns, creating a cycle where environmental crisis leads to protest and then persecution. While climate factors alone rarely drive asylum claims from Iran, they compound existing vulnerabilities and contribute to the desperation that forces people to flee when combined with political repression and economic collapse.

Iran receives minimal humanitarian foreign aid compared to other refugee-producing countries due to international sanctions, diplomatic isolation, and the government's rejection of external assistance in most circumstances. The Iranian government's refusal to cooperate with international humanitarian organizations means that vulnerable populations including refugees from Afghanistan living in Iran, internally displaced persons, and impoverished communities receive little international support. When economic sanctions are tightened, as they have been repeatedly over Iran's nuclear program and human rights violations, ordinary citizens bear the brunt through reduced access to medicines, food insecurity, and economic collapse, while the regime remains insulated. The absence of meaningful international engagement or support mechanisms means there are no protective buffers for at-risk populations, and no international presence to monitor or ameliorate human rights conditions, leaving vulnerable individuals with no option but to flee. Unlike countries with significant aid presence where assistance can sometimes enable people to remain, Iran's isolation means that when conditions deteriorate there are no external support systems to prevent displacement, contributing to the steady flow of asylum seekers.

Iran has one of the world's worst human rights records according to UN Special Rapporteurs, Amnesty International, and Human Rights Watch, with systematic violations across every category of fundamental rights. The UN General Assembly has passed resolutions condemning Iran's human rights situation annually for decades, citing excessive use of the death penalty including against juveniles, widespread torture, unfair trials, and persecution of minorities. The UN Special Rapporteur on Iran has documented thousands of cases of arbitrary detention, enforced disappearances, and executions following sham trials that lack basic due process. Freedom of expression, assembly, and association are severely restricted, with journalists imprisoned simply for reporting news and internet access heavily censored and periodically shut down entirely during protests. The judiciary lacks independence and functions as an instrument of political repression, with revolutionary courts issuing death sentences based on vague national security charges. Iran refuses to cooperate with international human rights mechanisms, denying UN monitors access to the country and rejecting recommendations from the Universal Periodic Review process. Women's rights organizations document systematic gender-based discrimination encoded in law, including unequal inheritance, marriage and divorce rights, and requirements for male permission to travel or work. The 2022-2023 crackdown on protests saw security forces deliberately shooting protesters in the face and genitals, sexually assaulting detainees, and carrying out mass arrests of thousands including children, with several protesters executed after rushed trials.