The center reported that gross domestic product (GDP) at constant 1400 (2021) prices reached 50.658 trillion rials with oil and 38.189 trillion rials without oil in the first half of 2025. In the same period last year, GDP stood at 50.612 trillion rials with oil and 38.363 trillion rials without oil. The comparison reflects a 0.1% GDP increase with oil and a 0.5% decline without oil.

The results show that in the first half of 1404, the agriculture sector shrank 0.3%, while the industry and mining group grew 0.3%. That category includes crude oil and natural gas extraction (up 1.8%), other mining (up 2.5%), manufacturing (down 1.1%), natural gas distribution (down 1.4%), water and electricity supply (down 8.4%) and construction (down 0.8%). The services sector grew 0.5% compared with the first half of 1403.

Seasonal calculations by the Statistical Center of Iran are based on 18 main sectors covering 50 activities under the ISIC Rev. 4 classification. Agriculture includes farming, livestock, forestry and fishing. The industry and mining category includes crude oil and natural gas extraction, other mining, manufacturing, water and electricity supply, natural gas distribution and construction. Services include wholesale and retail trade; accommodation and food services; transportation, warehousing and postal services; information and communications; financial and insurance activities; real estate and business services; veterinary services; public administration and urban services; education; health care and social work; and other public, social, personal and household services.

While most economic sectors contracted this summer, oil production helped prevent an overall economic decline. At constant prices, oil accounted for 23.7% of total economic growth during the period, compared with a 23.1% share in summer 1403.

The center’s data also shows that the oil sector grew 1.8% in the first six months of 1404. In spring, the sector’s growth was reported at 0.8%. This indicates that, despite widespread declines across other sectors, the oil industry recorded one percentage point of growth this summer. The data suggests Iran increased its oil and gas extraction and sales in the second quarter of the year.