ISC 2027 datesheet & the CISCE Class 12 calendar

When is the ISC 2027 exam? CISCE typically releases the ISC 2027 datesheet in November-December 2026. Practical / project exams run in January-February 2027, theory papers in February-March 2027, and results around mid-May 2027.

ISC 2027 timeline at a glance

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The ISC 2027 calendar, month by month

The ISC 2027 cycle from a candidate's perspective runs from the start of Class 12 in April 2026 to result day in May 2027. The fixed CISCE milestones along the way:

August-October 2026: LOC and school admin

The school files the ISC 2027 List of Candidates with CISCE through August to October, confirming subject combinations and paying the exam fee on each candidate's behalf. Internal-work timelines start in earnest - Computer Science project topics are usually finalised by October, Geography fieldwork is scheduled before the winter, and Physics, Chemistry and Biology lab records have to be at least 75% complete by the time of the school's pre-board exam. Candidates who will switch optional subjects (for example, swapping PE for EVS) need to confirm the change before the LOC closes.

November-December 2026: datesheet and pre-boards

CISCE typically publishes the ISC 2027 datesheet on cisce.org in late November or early December 2026. The datesheet lists each subject paper with the date, the start time (usually 9:30am, occasionally 2:00pm for shorter papers), the duration (3 hours for most papers, 90 minutes to 2 hours for a few) and the paper code. Schools run their first set of board-pattern pre-boards in November on the previous year's papers, then a more rigorous round in December once the datesheet confirms the order. This is the right month to lock the subject-by-subject revision plan paced to the gaps between papers.

January-February 2027: practical and project exams

Practical examinations for Physics, Chemistry, Biology, Computer Science, Home Science, Geography and Psychology are conducted in the school's lab through January and into early February 2027, supervised by a visiting examiner from another CISCE school plus the in-school subject teacher. The practical exam itself is typically 3 hours, including the experiment, viva and write-up. The internal mark from the year's lab record is combined with the practical exam mark and uploaded to CISCE before the theory window opens. Project files for Accounts, Computer Science, Psychology, Sociology and Geography are submitted to the school and a sample is moderated by an external examiner.

February-March 2027: theory papers

The ISC 2027 theory window runs across roughly six weeks of February and March, with most papers held in the morning slot. English papers come early in the schedule, science theory papers cluster in the second and third weeks, language and humanities papers run alongside, and the optional EVS paper is usually one of the last papers in the window. Each paper begins with 15 minutes of reading time before the writing window opens, and most papers are 3 hours long. Between papers CISCE spaces out the heavier subjects with deliberate gaps; the smaller, less common subjects sometimes share a date.

March-April 2027: evaluation

Once a paper is written, answer scripts move from the centre to CISCE's regional evaluation hubs, where panels of trained examiners mark them against the published rubric. Evaluation runs through March and April, with a moderation step to ensure consistency across markers. Internal marks already uploaded by the school are added to the external mark at the score-compilation stage; the system computes the subject total against the 70/30 or 80/20 split.

May 2027: results and aftermath

ISC results are declared around mid-May 2027 on the CISCE results portal and through schools. The statement of marks lists each subject with the external and internal components and the subject total; the pass certificate is issued separately. Candidates who need re-checking or re-evaluation must apply within the short window CISCE announces with the result (usually a few weeks). Re-checking is fast and clerical; re-evaluation can move the mark up or down. The compartment / improvement exam window opens shortly after, typically with a July 2027 sitting for candidates who need to re-attempt one subject.

How should I use the gaps between ISC papers?

CISCE deliberately leaves multi-day gaps between most ISC papers, especially the heavier theory subjects. Map your personal datesheet the moment it's out: the subjects with the smallest gap before them need to be exam-ready earliest, and your weakest subject should ideally sit after a longer gap you can use for final revision.

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Exam-day rules every ISC candidate should know

Each ISC exam day follows the same logistics. Candidates report to the centre by 9:00am for a 9:30am paper - most schools insist on a 30-minute buffer to allow for ID checks and seating. The admit card and a school photo-ID are mandatory and checked at the gate. Permitted items inside the hall: a transparent pencil case, blue or black ball-point pens (CISCE colour rule), pencils for diagrams and graphs, a wooden geometry box where applicable, a clear water bottle, and a non-programmable scientific calculator for sciences, Computer Science and Accounts. Mobile phones, smart watches, programmable calculators and any electronic device are not allowed in the hall and must be left outside. The first 15 minutes are reading time - the paper is on the desk but writing is not permitted. Three hours of writing follow. Candidates may not leave the hall before the first hour. Answer scripts and additional sheets are tied together at submission; rough work is on a designated page submitted with the script.

Compartment and improvement exam in July 2027

A candidate who fails one subject in the main ISC 2027 cycle (below 35% or below the certificate aggregate) qualifies for the compartment exam, which CISCE typically holds in July 2027. The candidate registers through the school within the application window announced with the result, pays the per-subject fee and re-attempts the failed subject under the same paper pattern. A pass in the compartment exam gives the candidate the regular ISC certificate, with the marks and the year noted accordingly. Candidates who passed but want to improve a mark can apply for an improvement attempt in the next regular ISC cycle (ISC 2028 in this case); the better of the two marks is generally reported, though policies on which mark is taken vary by year and should be checked before applying.

Re-checking and re-evaluation process

The two post-result remedies are distinct. Re-checking is a clerical totalling exercise: a CISCE official re-adds the marks on the script and confirms whether any sub-questions were missed by the original marker. It is fast, inexpensive, and rarely changes more than a mark or two. Re-evaluation is a substantive remarking by a fresh examiner: the script is re-read end-to-end against the rubric and the mark is set afresh. The new mark replaces the old one, even if it is lower - candidates should only apply for re-evaluation in subjects where they are confident the original mark was below the rubric expectation. Both routes are applied for through the CISCE portal within the post-result window the council announces with the result, and both require a per-paper fee.

Why do ISC practicals come before theory?

• Science streams: Physics, Chemistry, Biology practicals carry real marks and happen weeks before theory.
• Project / internal work: many ISC subjects carry a 20% internal component - projects and assignments are submitted before the theory window.
• Don't trade them off: a strong internal score is the cheapest marks in the ISC aggregate - losing them for theory revision is a bad trade.

Why ISC 2027 isn't synonymous with the calendar year 2027

The naming convention CISCE uses can confuse first-time candidates. The "ISC 2027" cycle is the cohort writing the boards in the February-March 2027 window - a candidate who began Class 11 in April 2025 and Class 12 in April 2026. The result, the certificate and the mark sheet all carry "2027" on them because that is the year the exam is taken and the certificate is issued. The Class 11 candidate currently in school as of mid-2026 is targeting ISC 2027; the Class 11 candidate beginning in April 2026 is targeting ISC 2028. The datesheet you wait for in late 2026 is the ISC 2027 datesheet, and the "ISC 2026" cycle is already complete by the time this page is being read.

How do I plan the run-up to ISC 2027?

• By Oct 2026: full syllabus once, start subject-wise mocks.
• Dec 2026: datesheet out - lock a paper-by-paper revision schedule around the gaps.
• Jan-Feb 2027: practicals + full-length timed mocks per subject.

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