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Study Hacks

How to Build a 90-Day Study Plan from Scratch: The Complete Guide

By Sharvesh Kumar · 05 Nov 2025 · 649 views
CS & CA Exam Specialists · Reviewed for accuracy by practising professionals
The Problem
90 days. 6 papers. 2,000 pages. It sounds impossible. It isn't — but only if you have a plan that's been engineered for these 90 days specifically. A plan that accounts for your weak areas, builds in revision cycles, and peaks you on exam day.

The 90-Day Architecture

90 days breaks naturally into three 30-day phases, each with a distinct function. Doing Phase 3 activities in Phase 1 is as wasteful as doing Phase 1 activities in Phase 3. Match your activity to the phase.

Phase 1 (Days 1–30): Foundation and Coverage
Goal: First pass through all subjects. Chapter by chapter, systematic. Brain dumps after each chapter (active recall). Identify and flag weak topics as you go. Do NOT spend extra time on weak topics yet — just flag them and keep moving. Coverage is the priority.
Phase 2 (Days 31–60): Depth and Weakness Attack
Goal: Second pass on all subjects + targeted attack on flagged weaknesses. First full mock per subject (diagnostic). Flashcard drilling for all weak topics. Active recall practice intensifies. Build answer templates for theory subjects.
Phase 3 (Days 61–90): Consolidation and Peak
Goal: Rapid revision cycles + mock exam blitz + confidence building. Day 61–75: Weekly rapid revision of all subjects + 2 mocks/subject. Day 76–86: Daily mocks (rotating subjects) under full exam conditions. Day 87–89: Light summaries only, formula sheets, mnemonics. Day 90: Rest, early sleep, mental preparation.

90-Day Hourly Budget

💡 Time Budget (CA Final Example)
Daily study hours: 6 effective hours
Total available: 90 × 6 = 540 hours
Buffer (illness, events): 10% = 54 hours
Net available: ~486 hours

Allocation:
SFM (complex, high marks): 80 hours
Advanced Accounts: 85 hours
Audit: 60 hours
Law: 55 hours
Tax: 70 hours
Costing+MIS: 75 hours
IT+SM: 40 hours
Revision built into Phase 2 and 3 totals above
Day 1: Subject audit + hours allocation + Phase 1 daily targets
↓
Days 1–30: Coverage + brain dumps + flag weak topics
↓
Days 31–60: Depth + weakness focus + first mocks + flashcards
↓
Days 61–85: Rapid revision cycles + mock exam blitz
↓
Days 86–89: Light summaries + formulas + mental prep
↓
Day 90: Rest. Trust the preparation.
⚠️ 90-Day Plan Killers
❌ Spending Phase 1 time perfecting notes (coverage first)
❌ Skipping Phase 2 mocks "because I'm not ready"
❌ Adding new resources/books in Phase 3
❌ Studying past midnight consistently (degrades consolidation)
❌ No weekly review and plan adjustment (plan must flex)
❌ Unplanned 90 Days
  • Day 1–70: Study favourite subjects
  • Day 70: Realize 3 subjects untouched
  • Day 71–90: Panic coverage, no revision
  • Exam: uneven, unconfident
✅ Planned 90 Days
  • Phase 1: All subjects covered
  • Phase 2: All weaknesses addressed
  • Phase 3: All papers mocked and sharpened
  • Exam: systematically prepared, confident
🎯 Build Your 90-Day Plan in 45 Minutes
Open a spreadsheet. Row 1: Subject names. Row 2: Total chapters. Row 3: Hours needed. Below: 90 rows (one per day) with daily subject assignments. Fill Phase 1 now. Adjust Phase 2 and 3 after first mock results. A rough plan beats no plan by a factor of 10.
  • 90-day plan written with daily targets per subject
  • Phase 1: Coverage of all subjects by Day 30
  • Phase 2: First mock per subject by Day 45
  • Phase 3: 10 full mocks across all papers by Day 85
  • Weekly review and plan adjustment (Sunday)
  • 10% buffer built into every week
  • Day 90 reserved for rest, not studying
🔑 Key Takeaway
A 90-day plan is not a straitjacket — it's a GPS. It tells you where you are relative to where you need to be. Adjust course weekly. Trust the architecture. Students who enter exams with a completed 90-day plan behind them don't just pass — they perform.

Morning vs. Evening: When Does Learning Stick Best?

Retention Score for Same Material: Morning vs. Afternoon vs. Evening Study

48-hour retention score for technical learning | circadian rhythm studies, Schmidt et al. 2020

Morning study (6–9am) produces the highest retention for technical and conceptual material — aligned with peak cortisol levels that enhance alertness and memory encoding. Late-night study (9pm–midnight) produces 33% lower retention than morning for the same material. For CA/CMA/CS students: protect your mornings for the hardest material.

The Ideal Morning Study Routine — 90 Minute Version

Time Activity Duration Why This Order
6:00am Wake + no phone for 30 min — Cortisol peak — protect it from dopamine hits
6:00–6:10am Yesterday's topic brain dump (paper) 10 min Activates prior knowledge before new learning
6:10–6:30am Review brain dump gaps 20 min Fills knowledge gaps while memory is freshest
6:30–7:30am New material — hardest topic of the day 60 min Peak cognitive hour — use it for peak difficulty
7:30–7:45am Quick active recall of what was just studied 15 min Locks in morning's learning before breakfast
🎓 E-mentor's Morning Test Integration
Use E-mentor's 10-question quick tests as your 7:30am active recall check. After 60 minutes of new material, a short E-mentor test on that chapter's key concepts takes 10–15 minutes and immediately tells you what you absorbed and what you missed. This is the most efficient use of your morning peak hour — new material studied during peak, immediately followed by active testing. Start E-mentor from the chapter menu, select the topic you just studied, and take the shortest available test format. Build this as a non-negotiable morning routine anchor.

📎 Official Resources

📅 Build Your Personalised Study Plan

Map your syllabus to a daily schedule — weeks to exam, hours per day, revision built in.

Create Study Plan →
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