How to Prepare for UPSC ESE/IES (Engineering Services) 2026

Understand the GATE-vs-ESE divergence on day one. GATE is a 100% objective exam optimised for speed and conceptual recall; ESE is a 3-stage exam where ~46% of the final marks come from conventional Mains where you sit and write derivations, design problems, neat diagrams and SI-unit-perfect numerical solutions for 3 hours. A GATE-only preparation routine will get you through Stage 1 but will collapse at Mains. From the start, parallel-track objective practice (Stage 1) with handwritten conventional practice (Stage 2) — even if the Mains is 6-8 months away.

Build the discipline foundation from the gold-standard textbooks. Civil: Punmia (Surveying, RCC, Soil Mechanics), Khurmi (Strength of Materials, Theory of Structures), B.C. Punmia + Ashok K. Jain (Geotechnical), S.K. Garg (Environmental, Irrigation), Khanna & Justo (Highway Engineering). Mechanical: Shigley + V.B. Bhandari (Machine Design), P.K. Nag (Thermodynamics, Power Plant), R.K. Bansal (Fluid Mechanics), J.P. Holman (Heat Transfer), Sadhu Singh (Theory of Machines). Electrical: Nagrath & Kothari (Electric Machines, Power Systems), B.L. Theraja Vol I-IV, A.K. Sawhney (Measurements), P.S. Bimbhra (Power Electronics), Nagrath & Gopal (Control Systems). Electronics & Telecom: Boylestad & Nashelsky (Electronic Devices), Sanjay Sharma (Communication Systems, DSP), Schilling & Belove (Analog & Digital Electronics), Simon Haykin (Communications), Pozar (Microwave). Pair every textbook with the corresponding Made Easy and IES Master class notes for ESE-pattern condensed revision.

Treat Paper I (GS & Engineering Aptitude) as a separate, equal subject — not a leftover. It carries 200 marks and counts in the final merit. The Engineering Aptitude portion (logical reasoning, mathematical reasoning, dimensional analysis) is high-scoring and stable; the General Studies portion (current affairs, schemes, environment, energy, ethics, ICT, project management) needs a dedicated monthly current-affairs source plus a static reader on environment, ethics and project management fundamentals. Made Easy / IES Master both publish ESE-specific Paper I books — pick one and stick with it.

Make conventional-paper writing a daily routine starting at least 6 months before Mains. The 60-mark question is the single most decisive unit of ESE — a typical paper has 5-6 such questions and you need to attempt at least 4 fully. Each 60-mark question legitimately takes 50-60 minutes including diagrams, derivations and a final boxed answer with units. Set a timer, sit on a desk with A4 sheets and a clipboard, draw with a scale, label every axis, write SI units after every numerical answer. Submit at least 2 full Mains-pattern papers per week for self-evaluation in the last 3 months — and ideally get them evaluated by a senior or coaching faculty for handwriting, presentation and step-marking feedback.

Build a personal formula sheet and a one-page-per-chapter revision sheet for the entire discipline syllabus by month 4 of preparation. ESE Paper II covers 10-12 subjects in the discipline — without a condensed revision document, the last 2 months become impossible. The sheet should have the key formulas, standard IS codes (e.g., IS 800:2007, IS 456:2000, IS 1893 for Civil; IS 732 for Electrical), the limiting values, the differentiating factors between similar concepts (e.g., Otto vs Diesel cycle, BJT vs MOSFET, single-phase vs three-phase fault) and the standard data you'll need in numerical problems.

Solve previous-year ESE papers — both objective (Stage 1) and conventional (Stage 2) — for at least the last 10 years, per discipline. ESE has strong topic-recurrence: certain Civil questions on Mohr's circle, RCC singly-reinforced beam design, retaining wall stability, Terzaghi's bearing capacity; certain Mechanical questions on heat exchanger LMTD, Otto-cycle efficiency, design of cotter joint; certain Electrical questions on three-phase fault analysis, induction motor torque-slip, transformer regulation; certain E&T questions on Smith chart impedance matching, BJT biasing, FM modulation index — these recur with surprising frequency. PYQ analysis tells you which sub-topics carry 70% of marks and where to stop spending time.

Use the right mock-test rhythm. Stage 1 mocks: 2-3 per week in the last 8 weeks (one Paper I, one Paper II, optionally one full Stage 1 combined). Stage 2 conventional mocks: 1-2 per week from month 4, increasing to 2-3 per week in the final 6 weeks before Mains. Kamiyab's Quick Practice mode is built for daily topic-level objective drilling; Full Mock mode replicates the ESE Stage 1 timer, negative-marking and section weights. For Mains, you'll need pen-on-paper handwritten mocks — there is no digital substitute.

Prepare the Personality Test from the day you fill the DAF. The 200-mark interview heavily depends on the Detailed Application Form: education, hobbies, work experience, home state, district and your discipline. The board will pick from these. Build a written interview file covering — discipline depth (top 30 viva-style questions), current engineering affairs (major infrastructure projects, Make-in-India, PLI scheme, recent budget allocations to MoRTH/Railways/Power/Telecom), ethics & values cases, leadership and decision-making scenarios, your home-state's key engineering projects, and recent news in your discipline (e.g., 5G/6G for E&T, Vande Bharat & Kavach for Mech/Elec, NHAI/Bharatmala for Civil).

Manage health and stamina deliberately. ESE is a 14-18 month process from notification to final list. Mains in particular is a physical endurance test — two 3-hour conventional papers can leave your hand cramping. Build writing stamina by writing 3-hour mocks weekly for the final 3 months. Sleep, fixed study hours and a sustainable schedule beat heroic week-long sprints. Burnout in month 9 of an 18-month process is the most common reason candidates underperform on the actual exam day.