Home
Education & Science
Years of Compulsory Education: Greece, Portugal, Ireland and Austria

Years of Compulsory Education: Greece, Portugal, Ireland and Austria

Education & ScienceApril 26, 2026

Education constitutes a foundational investment in national development. Compulsory education, defined as the legally mandated number of years children must attend school, establishes the baseline for human capital formation. According to World Bank data, the duration of compulsory education varies significantly across Europe, with notable reforms implemented between 1998 and 2024. This article examines the trajectories of four European Union nations—Greece, Portugal, Ireland, and Austria—analyzing changes in compulsory education duration, the motivations for these reforms, and the implications for each country’s educational priorities and outcomes.

Data at a Glance

Country	Country Code	1998	2024	Change (Years)
Greece	GRC	9	10	+1
Portugal	PRT	9	12	+3
Ireland	IRL	8	10	+2
Austria	AUT	9	13	+4

Source: World Bank

Between 1998 and 2024, all four countries increased the duration of compulsory education. Austria currently mandates the longest period at 13 years, followed by Portugal at 12 years, and Ireland and Greece at 10 years each.

What Is Compulsory Education Duration?

The World Bank defines compulsory education duration (indicator SE.COM.DURS) as the number of years that children are legally obliged to attend school. This metric is collected by the UNESCO Institute for Statistics through annual education surveys submitted by national governments and is mapped to the International Standard Classification of Education (ISCED) to ensure cross-country comparability. The data reflects school years rather than calendar years; in countries where the academic year spans two calendar years, the reference year is the year in which the school year ended.

A distinction must be made between full-time and part-time compulsory education or training. In Europe, full-time compulsory education typically lasts 10 to 11 years and concludes at ages 15 or 16. Some countries, such as Austria, have introduced additional compulsory part-time education or training beyond the full-time period.

Key contextual points:

Compulsory education duration does not measure the quality of schooling, only its legally mandated length
The metric captures enrollment obligations, not actual attendance or completion rates.
The duration of compulsory education alone does not reliably predict educational outcomes without considering curriculum quality, teacher training, and public investment.

Ireland: From 8 to 10 Years

Historical Background

Ireland’s compulsory education stood at just 8 years in 1998, the shortest among the four countries examined. This relatively short duration was a legacy of Ireland’s historical education structure, in which secondary education was not universally mandated. A landmark reform came in September 1967, when free upper second-level education was introduced, widely regarded as a milestone in Irish educational history. This reform gradually reshaped expectations around how long children stayed in school, and eventually, compulsory education was extended to 10 years.

By 2024, Ireland mandates 10 years of compulsory schooling. This two-year increase reflects a growing national emphasis on education as a central driver of economic transformation, a trend reinforced since the emergence of the “Celtic Tiger” economy in the 1990s and 2000s.

Key Statistics

Compulsory education duration (1998): 8 years
Compulsory education duration (2024): 10 years
Change: +2 years (+25% increase)
PISA Reading Score 2022: 516 — highest in the EU
Early school leavers (age 18–24, 2023): 4% — among the lowest in the EU-27
Tertiary educational attainment (age 30–34, 2023): 64% — highest in the EU-27
Higher secondary attainment (age 20–24, 2023): 95% — joint highest in the EU-27

Analysis

In examining Ireland’s educational outcomes, it is clear that the country performs exceptionally well by European standards. For example, in PISA 2022, Ireland ranked first among EU countries in reading literacy with a score of 516, significantly above the EU average of 469. The country also achieved one of the highest overall PISA scores globally, ranking second among EU member states. These results indicate that the two-year increase in compulsory education duration coincided with substantial improvements in curriculum quality and school performance.

This strong performance is further reflected in the relationship between Ireland’s 10 years of compulsory schooling and its 64% tertiary attainment rate among 30–34-year-olds—the highest in the EU. Only 4% of Irish 18–24-year-olds are early school leavers, indicating that the system not only mandates attendance but also effectively retains students throughout the compulsory period.

Greece: From 9 to 10 Years

Historical Background

Greece mandated 9 years of compulsory education in 1998, expanding to 10 years by 2024, representing an increase of one year. The Greek education system is highly centralized; the government maintains control over staffing, budgets, curricula, and assessments at the national level, resulting in limited school autonomy.

In recent years, Greece has made pre-primary education compulsory from age four, an important structural shift that effectively broadens the scope of mandatory schooling even beyond what the 10-year duration figure captures.

Key Statistics

Compulsory education duration (1998): 9 years
Compulsory education duration (2024): 10 years
Change: +1 year (+11.1% increase)
PISA Reading Score 2022: 438 — ranked 23rd out of 26 EU countries
Early school leavers (age 18–24, 2023): 4% — among the lowest in the EU-27
Tertiary educational attainment (age 30–34, 2023): 45% — above the EU target of 45%
Higher secondary attainment (age 20–24, 2023): 95% — joint highest in the EU-27
STEM tertiary enrollment share (2023): 33.7% vs. EU average of 26.9%
Government expenditure on education in 2022 was 4.1% of GDP, below the EU average.

Analysis

Turning to Greece, the country is notable in comparative data. Despite mandating only 10 years of compulsory education, Greece achieves a 95% higher secondary attainment rate among 20–24-year-olds and a low early school leaving rate of 4%, comparable to Ireland. These outcomes indicate that strong cultural and social norms support secondary education completion, independent of legal requirements.

However, analysis of PISA results reveals persistent quality gaps. Almost half of Greek students fail to reach basic proficiency in mathematics according to PISA 2022. Greece ranks 23rd out of 26 EU countries in PISA reading scores, with a score of 438, compared to an EU average of 469. The EU Education and Training Monitor 2025 notes that, despite reforms and EU-funded investments, major challenges persist in the acquisition of basic skills, particularly in mathematics. The number of top-performing students has also dropped sharply in recent years. This underscores a fundamental limitation of compulsory education duration as a metric: Greece mandates 10 years of schooling, but the quality of education delivered over those years remains a concern.

Greece’s centralized governance structure is identified as a structural barrier — key decisions on staffing, budgets, and curriculum are taken centrally, leaving schools with limited ability to adapt to local needs.
Public expenditure on education as a share of GDP was 4.1% in 2022, below the EU average of 4.8%
STEM programs attract a disproportionately high share of tertiary students at 33.7% vs. 26.9% EU average, suggesting a strong technical orientation in Greek higher education

Portugal: From 9 to 12 Years — The Boldest Reform

Historical Background

Portugal made the most substantial structural reform among the four countries, expanding compulsory education from 9 to 12 years — a three-year increase. This reform came through Law 85/2009, which established a new legal framework for compulsory education, making school attendance mandatory for children and young people between the ages of 6 and 18. The new regulations came into force in the 2012–2013 academic year. The Portuguese Ministry of Education stated, “Compliance with 12 years of schooling is relevant to the social, economic, and cultural development of the whole country. This process should be safe, continuous, and consistent, ensuring the promotion of quality education and the successful development of all students.”

Portugal’s history of compulsory education has been one of consistent expansion. Compulsory schooling was first extended from 3 to 4 years in 1956 (for boys only), to girls in 1960, to 6 years in 1964, and to 9 years before the 2009 reform raised it to 12.

Key Statistics

Compulsory education duration (1998): 9 years
Compulsory education duration (2024): 12 years
Change: +3 years (+33.3% increase) — largest relative gain among the four countries
Age range covered: 6 to 18 years.
PISA Reading Score 2022: 477 — ranked 12th out of 26 EU countries
Early school leavers (age 18–24, 2023): 8% — at the EU target threshold
Tertiary educational attainment (age 30–34, 2023): 39% — below the EU-27 average
Higher secondary attainment (age 20–24, 2023): 87%
Government expenditure on education (% of GDP, 2021): 4.78%
Youth dropout rate (age 15–34): 16.8% — above EU average

Analysis

Portugal’s reform represents a deliberate and ambitious policy decision. By mandating 12 years of compulsory education, students must now complete full upper secondary education before leaving obligatory schooling—a higher standard than in Ireland and Greece, where students may exit at the end of lower secondary education. Although national attainment has been significant, results remain uneven. Portugal’s PISA reading score of 477 ranks 12th in the EU, indicating a mid-tier position. The overall PISA composite reflects a functional, though not exceptional, system. However, the youth dropout rate remains at 16.8%, indicating that mandating 12 years of schooling has not fully eliminated early school dropout. This tension is recognized in Portuguese education policy: while the expansion of compulsory schooling increased secondary school enrollment, many schools lacked the capacity to accommodate the influx.

The risk of expansion too rapidly was acknowledged at the time of the reform: the National Education Council warned that raising the age for compulsory education could pose logistical challenges as more students enrolled in secondary schools with limited capacity.
Portugal’s 39% tertiary attainment rate among 30–34-year-olds is notably below the EU-27 average, suggesting that while 12 years of schooling is mandated, pathways to higher education remain underdeveloped relative to peers.
Public spending on education at 4.78% of GDP positions Portugal roughly at the European midpoint, reflecting consistent but not exceptional investment

Austria: From 9 to 13 Years — Europe’s Longest Mandate

Historical Background

Austria holds the distinction of having the longest compulsory education duration among these four countries — and indeed among European countries — at 13 years as of 2024. This figure combines Austria’s 9-year full-time compulsory schooling (from age 6 or 7 to 15) with a significant policy introduced in the 2016/17 school year.

Under Austrian law, compulsory schooling lasts until age 15. Since the 2016/17 school year, however, all young people who have not yet reached the age of 18 must continue in some form of education or training after completing compulsory schooling — either secondary school, an apprenticeship, vocational training, or other recognized program. This additional compulsory education or training period effectively extends legal educational obligations from age 6/7 to age 18, for a total of 13 years. Austria’s education system is notably structured around early streaming at ages 10 and 14, a traditional feature that has been subject to educational reform debates but remains in practice.

Key Statistics

Compulsory education duration (1998): 9 years
Compulsory education duration (2024): 13 years
Change: +4 years (+44.4% increase) — largest absolute gain among the four countries
Structure: 9 years full-time compulsory schooling + additional compulsory education or training until age 18
PISA Reading Score 2022: 480 — ranked 9th out of 26 EU countries
Early school leavers (age 18–24, 2023): 9% — at the EU benchmark
Tertiary educational attainment (age 30–34, 2023): 44% — close to EU-27 average
Higher secondary attainment (age 20–24, 2023): 85%
Government expenditure on education (% of GDP, 2022): 4.77%
PISA underperformance in mathematics (2022): 24.9% — better than the EU average of 29.5%

Analysis

Austria’s 13-year compulsory education duration reflects the 2016/17 policy innovation that extended educational obligations beyond traditional full-time schooling. The World Bank’s SE.COM.DURS indicator captures this expanded mandate, resulting in Austria’s 13-year figure and positioning Austria as the EU leader in legal education duration.

Austria demonstrates strong educational outcomes. Its PISA reading score of 480 ranks 9th in the EU, and although underperformance in mathematics increased from 21.1% in 2018 to 24.9% in 2022, this remains better than the EU average of 29.5%. This achievement is notable given the 13-year mandate’s inclusion of vocational pathways, indicating that the system maintains academic quality while also serving students in non-academic tracks.

The Austrian model is particularly interesting for its dual-track approach: students who find an apprentice position attend vocational school for three years alongside their work placement, fulfilling part of the 13-year mandate through professional training rather than traditional classroom schooling. This integration of vocational and academic pathways within compulsory education is one of Austria’s most distinctive institutional features.

Austria’s early streaming at age 10 channels students into different educational tracks, a feature that some researchers argue may entrench social inequality, while others credit it with enabling tailored vocational preparation
The 13-year duration requirement reflects Austria’s recognition that school completion alone is insufficient — young people must be connected to a structured pathway toward employment or higher education.
With 44% of 30–34-year-olds holding tertiary qualifications, Austria sits near the EU-27 average, suggesting its strong vocational system captures many graduates who do not pursue university but do complete substantial post-compulsory training.

Comparative Analysis Across All Four Countries

Duration vs. Educational Outcomes

The data reveal that longer compulsory education does not automatically produce superior PISA outcomes. A comparison of all four countries illustrates this clearly:

Country	Compulsory Years (2024)	PISA Reading 2022	PISA Rank (EU)	Early School Leavers	Tertiary Attainment (30–34)
Ireland	10	516	1st	4%	64%
Austria	13	480	9th	9%	44%
Portugal	12	477	12th	8%	39%
Greece	10	438	23rd	4%	45%

Ireland, with 10 years of compulsory education—the joint shortest among the four countries—achieves the highest PISA scores in the EU and the highest tertiary attainment in the EU-27. In contrast, Greece, also at 10 years, ranks 23rd out of 26 EU countries in PISA reading. Austria, with 13 years, outperforms Greece in all outcome metrics despite a more complex educational structure. This divergence supports findings from World Bank and OECD research, which indicate that the quality of education delivered within mandated years is more consequential than duration alone.

Growth Trends: Who Reformed Most?

Measured by percentage increase in compulsory education years between 1998 and 2024:

Austria: +4 years, a 44.4% increase from 9 to 13 years
Portugal: +3 years, a 33.3% increase from 9 to 12 years
Ireland: +2 years, a 25% increase from 8 to 10 years
Greece: +1 year, an 11.1% increase from 9 to 10 years

Portugal’s reform was the most structurally ambitious in terms of policy intent — it legally mandated full secondary school completion for all students. Austria’s increase is largely driven by its post-compulsory training extension introduced in 2016/17, a different kind of policy instrument that combines academic and vocational obligations.

Education Expenditure Context

Country	Education Spending (% of GDP)	Year
Portugal	4.78%	2021
Austria	4.77%	2022
Greece	4.1%	2022
Ireland	~4.0%	2021

Portugal and Austria allocate the highest proportion of GDP to education among these four countries. Greece’s public education expenditure, at 4.1% of GDP, is below the EU average of 4.8%. This may contribute to the gap between Greece’s high secondary completion rate and its relatively low PISA performance, as high enrollment does not necessarily correspond to high-quality resources.

Why Does Compulsory Education Duration Matter?

The duration of compulsory education is not merely a legal formality. Research consistently links longer mandated schooling to concrete social and economic outcomes:

Earnings premium: Returns to schooling are positively associated with years of education. Extended compulsory education creates a broader educated base and lifts average workforce skill levels.
Inequality reduction: The expansion of compulsory schooling has been shown to reduce inequality in further education and economic outcomes
Labor market readiness: Workers with higher literacy proficiency are more likely to use their skills at work and have higher economic output
Dropout prevention: Countries with longer compulsory education periods — when backed by adequate resources — tend to keep students in school longer, reducing dropout risk
Civic participation: Education correlates with stronger democratic participation, public health awareness, and social cohesion

However, data from these four countries also illustrate the limitations of duration as a standalone metric. Greece mandates 10 years and achieves near-universal secondary completion, yet records poor PISA results. Portugal mandates 12 years but maintains a 16.8% youth dropout rate. These findings underscore that legal duration must be accompanied by quality investment to achieve meaningful educational outcomes.

Conclusion

Between 1998 and 2024, Greece, Portugal, Ireland, and Austria each increased the number of years children are legally required to attend school. Austria leads with 13 years — the longest in the EU — followed by Portugal at 12, and Ireland and Greece at 10 years each. The growth rates were substantial: Austria extended its mandate by 44.4%, Portugal by 33.3%, Ireland by 25%, and Greece by 11.1%.

The statistical evidence demonstrates that a shared commitment to expanding compulsory education has not produced uniform results. Ireland demonstrates that 10 years of high-quality, well-resourced compulsory schooling can yield leading outcomes in the EU, including the highest PISA scores and tertiary attainment rates. Austria shows that a longer mandate, when combined with structured vocational pathways, produces solid, above-average outcomes. Portugal has implemented the most ambitious structural reform, but continues to face challenges in translating increased mandates into measurable attainment. Greece exemplifies the risk of high enrollment with lower investment, achieving near-universal school completion but experiencing persistent gaps in basic skills acquisition.

For policymakers and researchers, the key insight from these data is that compulsory education duration is a necessary but not sufficient condition for educational quality. Countries that combine legally mandated attendance with robust public investment, high-quality curricula, strong teacher development, and institutional adaptability are most successful in translating classroom time into genuine human capital.