Sleep Restriction Worksheet: Build a CBT-I Sleep Window from Your Diary Data
A sleep restriction worksheet uses sleep diary records to plan a CBT-I sleep window for insomnia. Review the schedule and daytime sleepiness with a trained clinician.
Reviewed by Michael Callans, MSW 
About this tool
A sleep restriction worksheet organizes sleep diary data into a planned bedtime and wake time for insomnia care. It helps you compare time asleep with time in bed and bring a proposed schedule to a clinician, especially when long periods awake in bed have become frustrating. Sleep restriction therapy is one of the most effective components of cognitive behavioral therapy for insomnia (CBT-I), the recommended first-line treatment for chronic insomnia. Developed by Arthur Spielman, it works on a counterintuitive principle: spending less time in bed, not more, often leads to deeper, more consolidated sleep. When you lie awake for hours, the bed becomes associated with frustration and wakefulness. Restricting time in bed rebuilds your natural sleep drive and re-establishes the bed as a place for sleep.
The method uses your own data. From a week or two of sleep diary records, you calculate your average total sleep time: the hours you actually sleep, not the hours you spend in bed. Your initial sleep window is set close to that average (most protocols use a floor of around five to five and a half hours, never less). You pick a fixed wake time and count backward to set your bedtime, and you keep that window every day, including weekends. As your sleep becomes more efficient, you gradually extend the window.
Sleep efficiency is the key metric: total time asleep divided by total time in bed, as a percentage. When efficiency stays high (commonly 85 to 90 percent or more) over several nights, you add 15 to 30 minutes to the window. If efficiency drops, you hold or trim it. Over weeks, this tightens the relationship between being in bed and being asleep.
Sleep restriction is demanding. It usually increases daytime sleepiness in the first week or two before sleep improves, which is why it is best done with guidance from a CBT-I trained clinician, and why it requires real caution. See the safety note before beginning.
Your sleep window is not a permanent limit, it is a starting point that moves as your data changes. Compare each week's average sleep efficiency to the prior week: efficiency at or above about 85 to 90 percent on most nights usually means you are ready to add 15 to 30 minutes to the window, while efficiency below that means holding the window steady or trimming it slightly. A rough night here and there is normal while the window is tightening, so judge progress by the weekly average, not any single night.
Sleep restriction is not the right first step for everyone, and it works best with support. If insomnia is layered with untreated sleep apnea, a mood or anxiety condition, chronic pain, or irregular shift work, a therapist or sleep medicine clinician trained in CBT-I can tailor the protocol and check on your daytime functioning as you go. You can search the Psychology.com therapist directory for someone who offers CBT-I, and if anxiety seems tangled up with your sleep trouble, the Insomnia Test can help clarify what you are dealing with before you start. The Insomnia Test is a screening tool; its result cannot identify every cause of poor sleep or determine whether sleep restriction is appropriate.
The American Academy of Sleep Medicine guideline supports multicomponent CBT-I and gives sleep restriction alone a conditional recommendation. This worksheet covers a component of care; completing it does not establish why you are having trouble sleeping. Sleep Hygiene Checklist and Bedtime Routine Planner can help organize habits to discuss alongside your Sleep Diary.
Treat the calculated window as a discussion aid. A high efficiency percentage can coexist with too little sleep and poor daytime functioning. Record sleepiness, difficulty concentrating, and any safety concerns alongside the diary. If you become too sleepy to drive safely, do not drive. Contact your clinician before continuing a restrictive schedule, particularly if mood or seizure symptoms change.
References
- Spielman AJ, Saskin P, Thorpy MJ. Treatment of chronic insomnia by restriction of time in bed. Sleep. 1987;10(1):45-56.
- Edinger JD, et al. Behavioral and psychological treatments for chronic insomnia disorder in adults: an American Academy of Sleep Medicine clinical practice guideline. J Clin Sleep Med. 2021;17(2):255-262.
- American Academy of Sleep Medicine. Behavioral and psychological treatments for chronic insomnia disorder in adults: clinical practice guideline. https://pmc.ncbi.nlm.nih.gov/articles/PMC7853203/
Cite this source
Psychology.com. (2026, September 16). Sleep Restriction Worksheet. Psychology.com. https://psychology.com/tools/sleep-restriction
Sleep Restriction Worksheet FAQ
What is sleep restriction therapy?
It is a CBT-I technique that limits time in bed to roughly the time you actually sleep, which strengthens your sleep drive and rebuilds the link between bed and sleep. As sleep consolidates, the window is gradually extended. This worksheet helps organize information for a conversation with a clinician; it does not replace an individualized sleep assessment.
Isn't less sleep a bad thing?
Your need for adequate sleep remains the same during sleep restriction. The technique changes the opportunity for sleep under a structured plan, and temporary sleepiness can make it difficult or unsafe for some people. A clinician should review daytime functioning as well as the diary and adjust the plan when the costs outweigh the benefits.
Is it safe to do on my own?
Sleep restriction temporarily increases sleepiness, so it can affect driving and concentration. It is best done with a CBT-I trained clinician, and certain conditions (such as bipolar disorder, seizure disorder, or untreated sleep apnea) require professional guidance first. Ask for an individualized plan before changing your schedule, especially if your work requires sustained alertness.
How long until it works?
There is no guaranteed deadline for improvement. A clinician reviews patterns across your sleep diary along with daytime alertness and adjusts the plan as needed. A difficult night does not prove the approach has failed, and increasing sleepiness is a reason to review safety rather than push harder. Bring your completed worksheet to follow-up appointments.
How is sleep restriction different from sleep hygiene?
Sleep hygiene covers habits such as caffeine timing, light exposure, and a consistent routine. Sleep restriction uses a planned sleep window based on diary estimates, with later adjustments guided by a clinician. The American Academy of Sleep Medicine recommends against sleep hygiene alone as treatment for chronic insomnia. A Sleep Hygiene Checklist can still help organize habits within a broader CBT-I plan.
Is this sleep restriction worksheet free to use?
Yes. The worksheet, its sleep window calculations, and the printable PDF are free on Psychology.com. You will need your own week or two of sleep diary data first, since the window is calculated from your actual average sleep time rather than a general formula.