Every CPA candidate eventually asks the same question: when should I study? Some swear by early morning sessions before work, while others insist that late-night studying is the only way they can focus. The truth is that the best time to study depends on your biology, your schedule, and the type of material you are working on. In this guide, we break down the science and help you find your optimal study window.
The Science of Chronotypes
Chronotype refers to your natural inclination toward being a morning person or an evening person. It is determined largely by genetics and influences when your body experiences peak alertness, energy, and cognitive function throughout the day.
Researchers generally identify three primary chronotypes:
- Morning types (early birds): These individuals wake up naturally between 5:00 and 7:00 a.m., experience peak cognitive performance in the mid-morning hours, and begin to fade by early evening. Roughly 25 percent of the population falls into this category.
- Evening types (night owls): Night owls naturally wake later, often struggle with early mornings, and hit their cognitive stride in the late afternoon or evening. They make up about 25 percent of the population as well.
- Intermediate types: The remaining 50 percent of people fall somewhere in the middle, with moderate flexibility in when they can perform well. Most people in this group function best from mid-morning through early afternoon.
Your chronotype is not something you can easily change through willpower alone. While you can shift your schedule somewhat through consistent sleep habits, fighting your biology leads to poorer cognitive performance and faster fatigue, both of which are counterproductive for CPA exam preparation.
What Research Says About Study Timing and Retention
Several studies have examined how time of day affects learning and memory. The findings are nuanced and offer practical insights for CPA candidates.
Morning Advantages
Research from the University of Toronto found that working memory, attention, and logical reasoning tend to peak in the late morning for most people. A study published in the journal Thinking & Reasoning confirmed that analytical problem-solving is generally strongest during morning hours, regardless of chronotype.
What this means for CPA prep: Complex analytical tasks like working through difficult FAR calculations, analyzing audit scenarios, or tackling multi-step tax problems may benefit from morning study sessions.
Afternoon Considerations
Most people experience a natural energy dip between 1:00 and 3:00 p.m., often called the post-lunch slump. This period is generally the least productive for demanding cognitive tasks. However, some research suggests that creative thinking and the ability to make connections between disparate concepts may actually improve during this lower-energy window.
What this means for CPA prep: The early afternoon may not be ideal for learning new material, but it can work for lighter review activities like flashcard review, watching video lectures, or reorganizing your notes.
Evening Advantages
A study from the University of Notre Dame found that information studied before sleep is better consolidated into long-term memory. The brain processes and strengthens memories during sleep, so a review session in the evening can enhance retention of material you studied earlier in the day.
What this means for CPA prep: Reviewing key concepts or doing a final round of flashcards before bed can leverage your brain's natural memory consolidation process.
Matching Study Type to Time of Day
Rather than debating whether morning or evening is universally better, a more effective approach is to match the type of studying to your energy level at different times of day.
High-energy periods are best for:
- Learning new, complex material for the first time
- Working through challenging MCQ sets where you need deep concentration
- Practicing task-based simulations that require multi-step reasoning
- Studying your weakest topics, which demand the most cognitive effort
Moderate-energy periods are best for:
- Reviewing material you have already learned once
- Watching video lectures at normal speed
- Reading through textbook chapters or outlines
- Organizing and updating your study plan
Low-energy periods are best for:
- Quick flashcard sessions for memorization
- Re-watching lectures at increased speed
- Light review of topics you already feel confident about
- Planning tomorrow's study session
How to Find Your Optimal Study Time
If you are not sure when you study best, try this experimentation framework over a two-week period.
- Track your energy levels. For one week, rate your alertness on a scale of one to ten at three points during the day: morning (7:00 to 9:00 a.m.), afternoon (1:00 to 3:00 p.m.), and evening (7:00 to 9:00 p.m.). Note which period consistently scores highest.
- Run a controlled experiment. During the second week, do a set of thirty MCQs on similar topics at each of your three time slots on different days. Track your accuracy and how long each set takes. The time slot where you score highest and work fastest is likely your cognitive peak.
- Evaluate subjective experience. Beyond raw scores, consider when studying feels the most sustainable. A time slot where you score slightly lower but enjoy the process more may be better for long-term consistency.
- Commit for three weeks. Once you identify your best window, commit to studying at that time for at least three weeks. Consistency amplifies the benefits because your brain begins to anticipate and prepare for focused work at that hour.
Practical Scheduling for Working Professionals
For many CPA candidates, the best study time is simply the time that is available. If you work full-time, your options may be limited to early mornings, lunch breaks, or evenings. Here are strategies for each.
Early Morning (5:00 to 7:00 a.m.)
- Prepare everything the night before: materials, coffee, a clear workspace.
- Start with your hardest material while willpower is fresh.
- Even sixty to ninety minutes of focused morning study adds up to seven to ten hours per week.
- Go to bed early enough to get seven to eight hours of sleep. Sacrificing sleep defeats the purpose.
Lunch Break (12:00 to 1:00 p.m.)
- Use this time for flashcard review or a quick set of twenty MCQs.
- Noise-canceling headphones and a quiet corner make a significant difference.
- Do not try to learn new material; use lunch for reinforcement of previously studied topics.
Evening (7:00 to 10:00 p.m.)
- Give yourself thirty minutes after work to decompress before studying.
- Avoid screens for entertainment before your study session; it makes the transition harder.
- End your session with a brief review of key takeaways to leverage sleep-based memory consolidation.
- Set a hard stop time to protect your sleep schedule.
Common Mistakes to Avoid
- Copying someone else's schedule: What works for your study partner or a Reddit poster may not work for you. Your chronotype, work schedule, and personal obligations are unique.
- Studying at inconsistent times: Jumping between morning one day and evening the next prevents your body from building a rhythm. Consistency matters more than the specific time you choose.
- Sacrificing sleep for study hours: Studying on five hours of sleep is dramatically less effective than studying on eight. Sleep is when your brain consolidates memories. Cutting it short undermines everything you studied that day.
- Ignoring diminishing returns: After about three hours of intense study, most people experience significant cognitive decline. Pushing past this point yields minimal benefit and accelerates burnout.
Build Your Ideal Study Routine
The bottom line is this: the best time to study for the CPA exam is the time when you can consistently show up, focus deeply, and sustain the effort over weeks and months. Use the science as a guide, experiment to find your peak, and then protect that time fiercely.
At Think CPA, we design our study tools to work with your schedule, not against it. Whether you are a dawn studier or a midnight grinder, our adaptive platform helps you make the most of every study session by focusing on the material you need most. The result is more efficient preparation that respects your time and energy.
Find your window, build your routine, and trust the process. Consistency at the right time will carry you to exam day with confidence.