⚙️ UPSC Engineering Services Examination 2026
UPSC ESE / IES 2026 - Mock Tests, Syllabus and Exam Pattern
Complete guide for the UPSC Engineering Services Examination (ESE), also called the Indian Engineering Services (IES) exam - India's most prestigious engineering recruitment. Open to Civil, Mechanical, Electrical, and Electronics and Telecommunication Engineering graduates. Three stages: Prelims (500 marks, objective), Mains (600 marks, descriptive, discipline-specific), and Personality Test (200 marks). All three stages count in final merit of 1300 marks. Prelims Paper I covers GS and Engineering Aptitude common to all disciplines. Paper II is your engineering discipline. Free mock tests, topic-wise syllabus, discipline-wise guide, cut-offs and expert strategy - all in one place.
474 Vacancies - 2026
1300 Total Merit Marks
1/3 Negative Marking (Prelims)
4 Engineering Disciplines
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500
Prelims Marks
600
Mains Marks
200
Interview Marks
1300
Total Merit Marks
474
Vacancies (2026)
📋 Table of Contents
Jump directly to the section you need
🎯 Practice Mock Tests - Subject-wise
Prelims Paper I (GS and Engineering Aptitude) is common to all disciplines. Paper II topics depend on your chosen engineering branch. Practice foundation subjects below.
⚙️ ESE is primarily a technical engineering exam: Prelims Paper II and both Mains papers are entirely from your chosen engineering discipline (Civil, Mechanical, Electrical, or Electronics and Telecom). GS and Engineering Aptitude (Paper I) covers current affairs, environment, ethics, ICT, project management and engineering aptitude topics - common to all disciplines. Build your core engineering subject strength first, then layer GS preparation on top.
🔍 UPSC ESE / IES 2026 - At a Glance
Key facts about India's most prestigious engineering services examination
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What is the Indian Engineering Services (IES)?
The IES / ESE is India's most prestigious engineering examination, conducted annually by UPSC to recruit Grade A and Grade B technical officers for central government departments including Indian Railway Service of Engineers, Central Engineering Service, Border Roads Engineering Service, Central Water Engineering Service, Indian Naval Armament Service, Indian Ordnance Factories Service, and various other Ministries. IES officers hold technical leadership and administrative authority in India's largest infrastructure and defence projects. The posting is pan-India and includes overseas assignments in some services.
✅ Eligibility Criteria
Age, education and nationality requirements for UPSC ESE 2026
📊 Prelims Exam Pattern - Both Papers Count in Merit
Unlike most exams where Prelims is qualifying, ESE Prelims marks are added to the final merit list. Score as high as possible in Prelims - every mark counts.
📄 Paper I - GS and Engineering Aptitude (Common)
Same for all 4 disciplines - 100 MCQs - 200 marks - 2 hours
2 marks per question. Negative: -2/3 per wrong (1/3 of 2 marks). Duration: 2 hours. OMR-based offline exam. Same paper for CE, ME, EE and E and T candidates.
📄 Paper II - Engineering Discipline (Branch-specific)
Chosen discipline - 150 MCQs - 300 marks - 3 hours
2 marks per question. Negative: -2/3 per wrong. Duration: 3 hours. OMR-based offline. Topic coverage across all major subjects of the chosen engineering discipline.
⚠️ Prelims marks count in final merit: Unlike UPSC CSE where Prelims is purely qualifying, ESE Prelims marks (500) are added to Mains (600) and Interview (200) for the final rank list. A strong Prelims performance can significantly pad your final rank - treat every Prelims question with Mains-level seriousness.
📝 Mains Exam Pattern - Conventional Descriptive Papers
Both Mains papers are from your chosen engineering discipline. Questions are conventional type - theory explanations, derivations, design problems, numerical calculations.
Civil Mains Topics
Paper I: Engineering Mechanics, Structural Analysis, Design of Steel Structures, Design of Concrete Structures, Geotechnical Engineering. Paper II: Fluid Mechanics, Hydraulics, Hydrology, Water Resources, Environmental Engineering, Transportation Engineering, Surveying.
Mechanical Mains Topics
Paper I: Engineering Mechanics, Strength of Materials, Theory of Machines, Vibrations, Design of Machine Elements, Fluid Mechanics and Fluid Machinery. Paper II: Thermodynamics, Heat Transfer, Manufacturing Technology, Production Planning, Industrial Engineering, Metrology.
Electrical Mains Topics
Paper I: Circuit Theory, Signals and Systems, E.M. Theory, Analog Electronics, Digital Electronics, Energy Conversion. Paper II: Electrical Machines, Power Systems, Control Systems, Electrical and Electronic Measurements, Analog and Digital Communication, Microprocessors.
Electronics and Telecom Mains Topics
Paper I: Basic Electronics Engineering, Signals and Systems, Networks, Analog Electronics, Digital Electronics, Control Systems. Paper II: Analog and Digital Communications, Advanced Electronics, Microwave Engineering, Computer Networks, VLSI Technology, Electromagnetism.
📚 Paper I - GS and Engineering Aptitude Syllabus
Common to all four disciplines. 15 distinct topic areas. Unique to ESE - blends general awareness with engineering-specific aptitude topics not tested in other competitive exams.
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Current Affairs - National and International
10-12 questions - emphasis on engineering and technology news
- Major engineering and infrastructure projects in India
- Government schemes related to infrastructure - PM Gati Shakti, Smart Cities
- Space and defence technology developments - ISRO, DRDO missions
- Energy sector - renewable energy targets, nuclear power projects
- International engineering and technology news
- Climate change - COP summits, India's NDC commitments
- Major bilateral agreements related to technology and infrastructure
- Railway modernisation, road infrastructure, port development
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Engineering Mathematics and Numerical Analysis
10-12 questions - applies across all disciplines
- Linear Algebra - matrices, eigenvalues, eigenvectors
- Calculus - differential and integral calculus, partial derivatives
- Differential Equations - ODEs and PDEs
- Complex Numbers and Complex Analysis
- Probability and Statistics - distributions, hypothesis testing
- Numerical Methods - Newton-Raphson, Euler, Runge-Kutta
- Transform Theory - Laplace, Fourier, Z-transform basics
- Vector Calculus - gradient, divergence, curl
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Energy and Environment
8-10 questions - ecology, pollution, conservation
- Basics of Ecology - ecosystem, food chains, biodiversity
- Environmental Pollution - types, causes, effects, control measures
- Energy Conservation - energy audit, energy efficiency
- Renewable Energy Sources - solar, wind, hydro, biomass
- Environmental Impact Assessment (EIA) - process and significance
- Climate Change - greenhouse effect, global warming, Kyoto Protocol, Paris Agreement
- Sustainable Development - principles, SDGs, green engineering
- Waste Management - solid, liquid, hazardous waste treatment
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Ethics and Values in Engineering Profession
6-8 questions - unique to ESE Paper I
- Engineering Ethics - code of ethics for engineers, professional responsibility
- Safety and Risk - role of engineers in ensuring public safety
- Intellectual Property Rights (IPR) - patents, copyrights, trade secrets
- Whistle-blowing - ethical obligations vs. loyalty
- Environmental Ethics - responsibility towards environment
- Case studies on engineering ethics violations
- Values - integrity, accountability, transparency in engineering practice
- Social responsibility of engineers - impact of engineering decisions on society
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Basics of Project Management
6-8 questions - project lifecycle and management tools
- Project Life Cycle - initiation, planning, execution, closure
- Work Breakdown Structure (WBS)
- Critical Path Method (CPM) and PERT
- Resource Allocation and Levelling
- Project Cost Management - budgeting, earned value analysis
- Risk Management in Projects - identification, assessment, mitigation
- Quality Management - ISO standards, TQM basics
- Contract Management - types of contracts in engineering projects
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Engineering Aptitude - Reasoning and Analytical Ability
10-12 questions - logical and analytical skills
- Logical Reasoning - analogy, classification, series
- Analytical Ability - statement-conclusion, syllogism
- Spatial Ability - visualisation, pattern recognition
- Data Interpretation - tables, charts, graphs
- Quantitative Aptitude - basic arithmetic, ratios, percentages
- Critical Thinking and Problem Solving
- Engineering Drawing basics - projections, views
- General Principles of Design - ergonomics, design for manufacture
⚙️ Discipline-wise Syllabus - Prelims Paper II and Mains
Choose your discipline and focus on its complete syllabus. Prelims Paper II (300 marks) and both Mains papers (600 marks) are entirely from your chosen discipline.
🏗️ Civil Engineering
Vacancies typically highest among 4 disciplines
Core Topics
- Engineering Mechanics - statics and dynamics
- Strength of Materials and Structural Analysis
- Design of Steel Structures (IS:800)
- Design of Concrete Structures (IS:456)
- Geotechnical Engineering - soil mechanics, foundation design
- Fluid Mechanics and Hydraulics
- Hydrology and Water Resources Engineering
- Environmental Engineering - water supply, waste water treatment
- Transportation Engineering - highway design, traffic engineering
- Surveying - conventional and advanced methods
- Construction Materials and Management
- Estimating, Costing and Specifications
🔧 Mechanical Engineering
Broad syllabus - thermodynamics, manufacturing, design
Core Topics
- Engineering Mechanics and Strength of Materials
- Theory of Machines and Vibrations
- Design of Machine Elements
- Fluid Mechanics and Fluid Machinery
- Thermodynamics and Heat Engines
- Heat and Mass Transfer
- Refrigeration and Air Conditioning
- Manufacturing Engineering - casting, forming, machining, welding
- Metrology and Inspection
- Industrial Engineering - PERT, CPM, inventory control
- Production Planning and Control
- Engineering Materials - properties and applications
⚡ Electrical Engineering
Power systems, machines, control and electronics
Core Topics
- Electric Circuits and Networks
- Electromagnetic Theory and Fields
- Electrical Machines - DC, transformers, AC machines
- Power Systems - generation, transmission, distribution
- Control Systems - transfer function, root locus, Bode plot
- Signals and Systems - Fourier, Laplace, Z-transform
- Analog Electronics - amplifiers, oscillators, op-amp circuits
- Digital Electronics - logic gates, sequential circuits, microprocessors
- Power Electronics - converters, inverters, rectifiers
- Electrical Measurements - instruments, error analysis
- Analog and Digital Communications
- Instrumentation and Process Control
📡 Electronics and Telecommunication Engineering
Circuits, communications, VLSI and microwave engineering
Core Topics
- Basic Electronics - semiconductor devices, BJT, FET, op-amps
- Electronic Circuits - amplifiers, oscillators, wave shaping
- Networks and Transmission Lines
- Analog and Digital Communication Systems
- Control Systems - feedback, stability, frequency response
- Digital Electronics and Microprocessors
- Signals and Systems
- Microwave Engineering and Antennas
- VLSI Technology and Integrated Circuits
- Computer Networks - OSI model, TCP/IP, routing
- Electromagnetism - Maxwell's equations, wave propagation
- Optical Fiber Communications
🏛️ Services and Departments Recruited Through ESE
IES officers are posted across India's most critical engineering departments and ministries
💰 Salary, Grade and Career Growth
IES officers are Group A Gazetted Central Government officers with pay structure at Level 10 and above
Gross salary includes Basic Pay + DA + HRA + TA + other allowances as applicable. Actual salary varies by city of posting (HRA is higher for metro postings). IES officers also receive perks including government accommodation (or HRA), staff car (for senior officers), LTC and official travel expenses.
📈 Previous Year Cut-off Marks
Cut-offs are for the Mains shortlisting stage (out of 500 Prelims marks). Final selection cut-offs are higher since Mains and Interview marks are added.
ℹ️ Cut-offs above are for Prelims-to-Mains shortlisting out of 500 marks. Final selection cut-offs from the combined 1300-mark score are around 750-850 for General category depending on the discipline and year. Civil Engineering typically has the highest absolute cut-off due to the highest number of aspirants relative to vacancies. E and T has historically had slightly lower cut-offs.
💡 Expert Preparation Tips
From our faculty who have guided hundreds of IES successful candidates to their dream engineering services
1
Prelims marks count in final merit - do not treat Prelims as a qualifying filter - This is the most strategically significant feature of ESE that separates it from UPSC CSE, BPSC, UPPSC and every other multi-stage exam. In ESE, your 500 Prelims marks are directly added to your 600 Mains marks and 200 Interview marks to give the final rank. A candidate who scores 280/500 in Prelims starts with a 40-mark advantage over someone who scores 240/500 - and that 40-mark gap can separate hundreds of rank positions. Many ESE aspirants focus almost entirely on Mains preparation and treat Prelims as a screening hurdle. This is a strategic error. Invest equally in Prelims quality - every additional mark you score in Prelims Paper II is worth the same as a Mains mark towards your final rank.
2
Paper I GS and Engineering Aptitude is the great equaliser - every aspirant should score 160+ - Paper I (200 marks) is common to all four disciplines and tests current affairs, engineering aptitude, environment, ethics, project management, material science and ICT. It is significantly less technically demanding than Paper II. Most aspirants who have studied engineering comfortably and follow current affairs can score 150-170 out of 200 with 4-6 weeks of focused Paper I preparation. Candidates who neglect Paper I and score only 110-120 lose 40-50 marks compared to aspirants who prepared it well - a gap that is hard to recover in Paper II where everyone is a strong engineer. Target 160+ in Paper I as a floor, not a ceiling.
3
Mains is descriptive with derivations, numericals and design problems - start answer writing early - ESE Mains is not a factual recall test. Both Mains papers require detailed mathematical derivations, step-by-step numerical solutions with appropriate units, design calculations following IS codes (for Civil), explanatory diagrams and circuit drawings (for EE and E and T), and written theoretical explanations at graduate engineering depth. Candidates who only solve previous year MCQs for Prelims and never practice writing full Mains answers typically score 40-60 marks below their knowledge potential in the Mains. Begin practicing Mains-level answer writing 4-6 months before the Mains date - write 2-3 complete answers daily, get them evaluated, and focus on diagram quality, solution presentation and derivation completeness.
4
GATE preparation and ESE preparation overlap by 70-80% - attempt both if eligible - GATE (Graduate Aptitude Test in Engineering) and ESE Paper II (and Mains) test largely the same engineering subjects at similar depth for the respective discipline. Candidates preparing for one exam are effectively preparing for the other with marginal additional effort. The key difference is that ESE has Paper I (GS and Engineering Aptitude, 200 marks), the Mains papers are descriptive rather than MCQ, and ESE has an interview round. If you are preparing for GATE, register for ESE as well - your core engineering subject preparation is already done. ESE has fewer vacancies (474 vs thousands of PSU and M.Tech seats via GATE) but offers a far more prestigious and rewarding career as a Grade A government officer with significant administrative authority.
5
Choose your discipline carefully - you cannot switch after applying - Your engineering discipline determines Paper II in Prelims and both Mains papers entirely. You must apply for the discipline matching your degree. However, some engineering graduates have degrees that could qualify for multiple disciplines (e.g., Electrical and Electronics graduates may qualify for either EE or E and T). If you have flexibility, analyse previous year cut-offs by discipline, the total vacancies per discipline, and your relative strength in each discipline's syllabus before deciding. Civil Engineering typically has the most vacancies and the broadest coverage of topics. Electronics and Telecom has historically had slightly lower cut-offs. Your decision at application is permanent for that cycle.
6
The Personality Test is 200 marks and carries significant weight - prepare from Day 1 of your journey - At 200 of 1300 total marks (15%), the ESE Interview is substantially weighted. The interview panel assesses not just your technical knowledge but your overall suitability for a technical leadership role in the government - communication, confidence, decision-making, awareness of current engineering and policy issues, and understanding of the specific service you may be allotted. Research the services you are likely to be offered (Indian Railway Service, Border Roads, Ordnance Factories etc.), their functions, current projects, and challenges. Follow engineering-specific news - major infrastructure projects, ISRO missions, defence acquisitions, and government engineering policy developments. Build communication skills throughout your preparation, not just in the weeks before the interview.
❓ Frequently Asked Questions - UPSC ESE / IES 2026
Most searched questions about ESE exam, eligibility and preparation answered by our experts
GATE (Graduate Aptitude Test in Engineering) and UPSC ESE are fundamentally different in purpose despite overlapping in technical content. GATE is primarily used for admission to M.Tech programmes and recruitment to PSUs (BHEL, ONGC, NTPC, etc.) - it is a single-day MCQ exam. ESE is a three-stage competitive recruitment process conducted by UPSC to fill Grade A government officer positions in prestigious central engineering services like Indian Railway Service of Engineers, Border Roads Engineering Service, and Indian Naval Armament Service. ESE has 1300 merit marks across Prelims, Mains (descriptive) and Interview; GATE is a single 100-mark exam with no interview. Core technical syllabus for your discipline overlaps about 70-80% between the two. If you are preparing for ESE, register for GATE as well - and vice versa. The additional preparation required for the other exam is marginal compared to the dual opportunity it creates.
UPSC ESE does not specify a formal attempt limit - candidates can appear as many times as they remain within the age eligibility window. The upper age limit for General category candidates is 30 years. This means a candidate who becomes eligible at 21 has up to 9-10 potential attempts before ageing out - though in practice most serious ESE aspirants clear it within 2-4 attempts. OBC candidates have until 33 years (3-year relaxation), SC/ST until 35 years (5-year relaxation), and PwBD until 40 years (10-year relaxation for General). Age is calculated as of the 1st of January of the year of the examination. Final-year engineering students can also apply provisionally and must submit their degree certificate before taking up appointment if selected.
Yes - ESE Prelims marks are added to the final merit list. This is one of the most important structural features of ESE and a key difference from UPSC CSE. The final merit is computed from all three stages: Prelims (500 marks) + Mains (600 marks) + Personality Test/Interview (200 marks) = 1300 marks total. Candidates need to clear minimum qualifying marks in Prelims to appear for Mains, and minimum marks in Mains to appear for the Personality Test - but the actual marks from all three stages are summed for the final rank list. This means that a higher Prelims score directly improves your final rank, and a candidate who under-performs in Prelims has a genuine disadvantage even if they perform well in Mains. Treat Prelims preparation with the same rigour as Mains preparation.
Civil Engineering typically has the highest number of vacancies in most ESE cycles due to the large number of civil engineering services (Indian Railway Service of Engineers, Central Engineering Service Roads, Border Roads Engineering Service, Central Water Engineering Service etc.). Mechanical Engineering is typically second. However, Civil Engineering also has the largest number of aspirants, so the competition per vacancy is still intense. Electronics and Telecommunication Engineering has historically had slightly lower cut-offs in absolute terms, which some interpret as relatively easier to clear. In practice, your selection chance is primarily determined by the depth of your preparation in your chosen discipline's syllabus - not by trying to choose a discipline based on cut-off trends. Apply for the discipline matching your engineering degree and focus on outperforming other candidates in that discipline's exam.
IES officers enter as Group A Gazetted Officers at Level 10 (basic pay Rs.56,100) and progress through a structured career path. Typical promotion timeline in most IES cadres: Junior Time Scale (entry) → Senior Time Scale (around 4-5 years) → Junior Administrative Grade (around 9-10 years) → Selection Grade / Non-Functional Grade (around 13-14 years) → Senior Administrative Grade, Director equivalent (around 16-18 years) → Additional Secretary equivalent → Secretary equivalent at senior levels. Specific titles vary by service - in Indian Railway Service of Engineers, the progression goes from Junior Engineer to Assistant Engineer to Executive Engineer to Senior Divisional Engineer to Chief Engineer. IES officers also have opportunities for deputation to international organisations, foreign assignments, and lateral movement to regulatory bodies and PSU boards at senior levels.
Preparing for both simultaneously is possible but challenging and generally not recommended unless you have a strong foundation in both areas. The UPSC CSE (IAS) syllabus is entirely General Studies-focused with no technical engineering content, while ESE is almost entirely technical engineering content with a small GS and Engineering Aptitude paper. The GS and Engineering Aptitude component of ESE Paper I (current affairs, environment, ethics, project management) does overlap partially with UPSC CSE Prelims GS content, so candidates with CSE preparation have an advantage in Paper I. However, the core of ESE - the engineering discipline Paper II and both Mains papers - has essentially zero overlap with IAS preparation. Most coaching institutes advise engineering graduates who wish to serve in administration to choose one path clearly: ESE for technical government service or CSE for IAS/IPS/IFS. Attempting both often results in incomplete preparation for either exam.
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Written and Reviewed by Our UPSC ESE and IES Expert Faculty
IES / ESE Specialist - Civil, Mechanical, Electrical and Electronics | 12+ Years Engineering Exam Coaching
This page has been prepared by our senior ESE faculty with experience coaching IES aspirants across all four engineering disciplines through Prelims, Mains and Personality Test stages. All exam pattern tables, discipline-wise syllabus breakdowns, service information and strategy guidance are based on official UPSC ESE notifications. The 2026 cycle has 474 vacancies with Prelims held on 8 February 2026 and Mains scheduled for 21 June 2026. Monitor upsc.gov.in for official announcements.
✅ All 4 Disciplines Covered ✅ IES Mains Specialist ✅ 300+ IES Selected Students
UPSC ESE / IES 2026 - Complete Guide: Syllabus, Exam Pattern, Discipline-wise Topics, Cut-offs and Free Mock Tests
The UPSC Engineering Services Examination (ESE), commonly known as the Indian Engineering Services (IES) exam, is India's most prestigious engineering recruitment conducted annually by the Union Public Service Commission. ESE 2026 announced 474 vacancies for Grade A and Grade B IES officer positions across four disciplines - Civil Engineering (CE), Mechanical Engineering (ME), Electrical Engineering (EE), and Electronics and Telecommunication Engineering (E and T). The exam has three stages: Prelims (Paper I GS and Engineering Aptitude 200 marks + Paper II discipline-specific 300 marks = 500 marks, objective type, 1/3 negative marking), Mains (two descriptive papers from chosen discipline, 300 marks each = 600 marks), and Personality Test (200 marks). Final merit is based on all three stages combined: 1300 total marks. Unlike most multi-stage exams, ESE Prelims marks are counted in the final merit - not just qualifying. ESE 2026 Prelims was held on 8 February 2026; Mains is scheduled for 21 June 2026.
The Paper I (GS and Engineering Aptitude) is common to all four disciplines and tests Current Affairs with engineering focus, Engineering Mathematics, Environment and Energy, Project Management, Material Science, ICT, Ethics in Engineering and Engineering Aptitude (reasoning, drawing, design principles) - totalling 15 topic areas. Paper II and both Mains papers cover the chosen engineering discipline's complete syllabus - Civil covers Structural Analysis, Soil Mechanics, Fluid Mechanics, Transportation, Environmental Engineering; Mechanical covers Thermodynamics, Fluid Mechanics, Manufacturing, Theory of Machines; Electrical covers Circuit Theory, Machines, Power Systems, Control Systems, Electronics; Electronics and Telecom covers Networks, Communications, Digital Electronics, VLSI, Microwave Engineering. IES officers are posted to services like Indian Railway Service of Engineers, Border Roads Engineering Service, Indian Naval Armament Service, Indian Ordnance Factories Service and Central Engineering Services across India's most critical infrastructure departments.
Our free ESE / IES mock tests cover all Paper I subject areas - General Studies (current affairs, environment, ethics, project management), General Knowledge and Awareness (national and engineering-specific current events), Physics (engineering foundation topics) and Chemistry (materials science base) - available topic-wise at zero cost at StudiesToday.com.