Busy all day, yet your most important task is still untouched? Time blocking gives each task a set slot on your calendar. Reserve long blocks for focus work, batch the small stuff, and protect both.
This guide is part of our wider look at time management, where time blocking sits alongside other ways of deciding what gets your hours.
| Item | Value |
|---|---|
| Suggested share of your week for focus time | 30-40% of your week |
| Minimum length of a focus block | At least 90 minutes |
| Suggested share for open collaboration time | 10-20% of your week |
| Change in meeting time during the experiment | 13% (1.5 hours) less |
| Individual contributors who felt they made more progress on top priorities | 67% |
These figures come from Atlassian’s calendar redesign experiment, published on December 13, 2023. Figures can change and the study was small, so check the source before you rely on them.
What time blocking is, and what it is not
Time blocking divides your available time into chunks and assigns each chunk to specific work. As Planio’s guide puts it, a to-do list tells you what to do, while time blocking tells you when to do it.
It is the opposite of multitasking. AcademicTransfer’s piece for researchers describes setting aside a certain amount of time to give your thoughts and efforts to one thing only, such as writing an article.
A close cousin is timeboxing. Atlassian defines it as blocking off a specific amount of time to work on specific tasks, which also signals to colleagues that they should not book a meeting then.
If you like working in short timed sprints inside a block, the pomodoro technique is one way to break a long block into manageable pieces.
How to set up a time-blocked week
Atlassian’s team tested a calendar redesign with a set of five steps. You can borrow the same order for your own week, as laid out in their write-up.
- Edit your meetings. Decline meetings that are not a high priority and group the rest together to free up focus time.
- Block your “not available” time. This might include lunch, school drop-offs, or doctor appointments.
- Add open collaboration time. Pick a few hours when your key collaborators are also online, and aim for 10-20% of your week.
- Add focus time. Block chunks of at least 90 minutes for work that needs deep thinking, and aim for 30-40% of your week.
- Add message time. Choose times when your brain is up for it, such as just after lunch or a block of meetings, so you stop checking notifications constantly.
The order matters: fixed commitments go in first, and your focus blocks claim what is left before reactive work can. Message time then gives incoming requests a home.
Turning the week into a daily plan
Each evening, choose your priorities for the next day. AcademicTransfer suggests limiting yourself to a maximum of three, then setting aside blocks large enough to work on them (source).
Small tasks then fill the gaps between the big blocks. The same author suggests processing many small tasks together in one general block of to-dos.
A simple day might look like Planio’s example: a focus block between 9 am – 11 am every morning, and another block at 1 pm – 4 pm left available for meetings.
How much of your week should each type of work get?
Atlassian’s guidance gives you a rough split to start from, rather than a rule.
- Focus time: 30-40% of your week, in blocks of at least 90 minutes.
- Open collaboration: 10-20% of your week, when key collaborators are online.
- The remainder: meetings, message handling and “not available” time.
These ranges come from Atlassian’s experiment. Your own mix will depend on your role, so treat them as a first draft and adjust.
Timing matters too. Planio notes that many people align their blocks with their natural ebb and flow of energy through the day, so the hardest work lands when they feel sharpest.
If every task seems to deserve its own block, the ideas behind 80/20 rule productivity can help you pick the few tasks that deserve the longest slots.
What does the research say about protected time?
The evidence is encouraging but modest. In the Atlassian experiment, 59 employees were split into two groups and redesigned their calendars for one week.
Afterwards, 67% of individual contributors and 71% of managers felt the guidance helped them make more progress on top priorities than in a typical week. Participants declined 17% more meetings than usual and spent 13% (1.5 hours) less time in meetings (Atlassian).
Participants also kept declining meetings and timeboxing their top priorities after the experiment ended, which suggests the habit can stick. Because the results are self-reported and the group was small, read them as a promising signal rather than proof.
A December 2024 newsletter summary of a separate study looked at protected calendar time. It covered an observational study of 27 workers and a randomized experiment with 89 participants.
- An hour of protected time gave 8-11% more time on coding and development work.
- It cut meetings and instant messaging by up to 16 minutes per hour, compared with unscheduled time.
- It was linked with less after-hours work.
On the problem side, Planio cites a study in which 45% of people agreed that regular context-switching made them less productive. It also reports that only 18% of people use a time management technique, and 25% admit to abandoning their schedule when an urgent task arrives.
How do you keep your blocks from falling apart?
Most plans fail at the first urgent request, so build in slack from the start. Here is what the sources suggest:
- Leave flexible time for reactive work, plus a buffer for breaks and resets (Planio).
- Tell people about your schedule. Planio lists communicating it to the team as a step in its process.
- Protect fewer, shorter blocks well. The newsletter summary of the protected-time research says a shorter, well-respected block is always better than a longer, poorly-respected one (RDEL).
- Review and adjust regularly, asking how effective the blocks are and how to improve them.
If a block keeps overrunning, that is useful information: the task takes longer than you planned, so give it more room next week.
Frequently asked questions
How long should a time block be?
Show answer
For deep thinking, Atlassian’s experiment asked participants to block at least 90 minutes. Shorter blocks suit message handling and small tasks.
Is timeboxing the same as time blocking?
Show answer
They overlap. Atlassian describes timeboxing as blocking off a specific amount of time for specific tasks, which is the core move in time blocking too.
What if my job is mostly reactive?
Show answer
Block time for the reactive work itself, so urgent requests have a home. Planio argues that even time blocking a small section of the day can make a huge difference.
Do I need an app to start?
Show answer
No. AcademicTransfer describes starting from a task list, a daily agenda or a weekly template, so a paper planner or any calendar can work.
