Time blocking: how to plan your week in blocks (with examples)

Time blocking vs timeboxing vs task batching

The three terms get mixed up. They work well together, but they aren’t the same thing.

Time blocking answers “when?”. Timeboxing answers “for how long, at most?”. Batching answers “what goes with what?”. A good week often uses all three: blocks in the calendar, a time limit on tasks that tend to sprawl, and one block for all the small stuff.

Timeboxing was popularised in Harvard Business Review in 2018 by Marc Zao-Sanders, who describes it as migrating your to-do list into your calendar. It leans on Parkinson’s law, which our time management tips cover: work without a limit tends to fill all the time available.

Cal Newport’s approach

The name most linked to time blocking is Cal Newport, a computer science professor at Georgetown University and author of Deep Work (2016). In a December 2013 blog post, he described his own practice:

• On paper, he gives each hour of the day two lines, then divides that time into blocks, each labelled with a specific assignment.
• He spends 10 to 20 minutes every evening building the next day’s schedule from his task lists, calendar and weekly plans.
• Reactive work (answering requests and messages) gets blocked like anything else, with a fallback: “process client requests; if it’s quiet, work on project X”.
• When the day goes sideways, he redraws the schedule for the remaining hours in the space he leaves beside the blocks.

Newport estimates that a 40-hour time-blocked week produces as much as a 60-plus-hour week without structure. That’s his personal estimate, not a measurement. In 2020 he published The Time-Block Planner, a notebook built around the method, with a page for capturing tasks that pop up without breaking the block you’re in.

Newport’s central point is often misread: the goal isn’t to follow the schedule to the minute. It’s to keep making deliberate choices about your time, including when you change the plan.

How to plan your week in blocks, step by step

Take 20 to 30 minutes on Sunday evening or Monday morning, with your calendar and your to-do list.

1. Put down what can’t move. Work or opening hours, classes, commutes, school runs, medical appointments, family dinners. That’s the skeleton of the week.
2. Pick three priorities. Three things that would make the week a success. The Eisenhower matrix helps: they’re often important but not urgent.
3. Estimate how long they’ll take, then add margin. If you think a report takes three hours, book two two-hour blocks.
4. Put focus blocks in your best hours. For many people that’s the morning; for others, the afternoon. 60 to 120 minutes, notifications off.
5. Batch the small stuff. Email, messages, payments, calls: one or two blocks a day instead of answering as things arrive.
6. Leave empty blocks. At least one buffer block a day and a catch-up block at the end of the week.
7. Every evening, ten minutes. Review tomorrow: whatever slipped today gets a new slot or leaves the week.

On messages, one study gives a useful benchmark. Kostadin Kushlev and Elizabeth Dunn (2015) asked 124 adults to check email three times a day for one week and as often as they liked in another. During the limited week, participants reported significantly lower daily stress. Batching messages into fixed blocks points the same way.

Buffers: why your estimates are too short

This is what breaks most schedules. Daniel Kahneman and Amos Tversky named the bias in 1979: the planning fallacy, our tendency to underestimate how long our own tasks will take.

The most cited study comes from Roger Buehler, Dale Griffin and Michael Ross (1994). They asked 37 psychology students at the University of Waterloo in Canada when they would hand in their honours thesis. Average prediction: 33.9 days. Actual time: 55.5 days. Only 29.7% finished by the date they gave. Even more telling: their worst-case prediction (“if everything went as poorly as it possibly could”) averaged 48.6 days, still short of reality, and fewer than half (48.7%) finished by that date.

The same paper holds a clue to a fix. In another experiment, the researchers asked some students to connect their prediction explicitly to past experience (“how close to the deadline did I finish my last assignments?”). In that group, 60% finished within their predicted time, against 29.3% in the control group.

For your week, that gives three practical rules:

• Look at past weeks, not your ideal plan. How long did the last report, stock count or tax return actually take?
• Keep at least 45 to 60 minutes a day with nothing fixed in it. That’s our rule of thumb, not a research figure. Adjust it: a parent of young children or a shop owner will need more.
• Book a catch-up block on Friday afternoon. If it stays empty, that’s time you’ve won back.

Attention residue: handle the transitions

Switching blocks has a cost. Researcher Sophie Leroy (2009) calls it attention residue: when you move from one task to another, part of your mind stays stuck on the first one. In her two experiments, people who switched to a new task while leaving the first one unfinished did worse on the second. Finishing the first task wasn’t always enough: what helped most was finishing it under time pressure, which made it easier to let go.

A follow-up study by Sophie Leroy and Theresa Glomb (2018) offers a simple fix: the ready-to-resume plan. Before switching, you jot down where you stopped, what’s left and where you’ll pick up. According to Leroy, a minute is enough. In their experiments, this short plan reduced attention residue and improved performance on the next task.

In practice:

• Don’t stack demanding blocks back to back. Leave 5 to 10 minutes between focus blocks.
• End every block with one line. “Stopped at section 3; restart with the June numbers.”
• Don’t break a focus block for something that can wait an hour: write it down and deal with it in the next small-tasks block.

If you struggle to get a block started, the Pomodoro Technique fits neatly inside: four 25-minute sessions fill a two-hour block.

Four real examples of time-blocked days

Real weeks don’t look like office templates. Here are four typical days built with the method above.

Jess, a mum of two in Manchester, working from home on Tuesdays. Her best hours are between the school run and lunch. She protects that block and keeps an hour of buffer in the afternoon, because a call from school or a sick child tends to arrive without warning.

Marcus, a freelance web developer in Austin. He works for four to six clients at a time. He blocks his mornings for build work, groups client calls in the early afternoon and keeps a fixed block for invoicing, which he used to put off.

Aisha, a college junior in Ohio, during finals. Her classes are fixed, so she puts active studying right after them, while the material is fresh, and keeps the evening for a short review.

Kwame, who runs a convenience store in south London. The shop is open from 9 am to 6:30 pm and customers come in whenever they like. So he does the deeper work before opening and during the quietest hour, and picks tasks for that slot that he can pause.

Common failures and how to adjust

One tip for the first few weeks: each evening, write one line noting which block overran most, and by how much. After two weeks you’ll have your real durations, which beat any estimate.

For tools, a paper planner or any calendar handles the blocks. What helps you stick to them is a reminder at the start of important blocks and a recurring reminder for your Sunday planning session. In Binome360, a sentence like “remind me every Sunday at 6 pm to plan my week” prepares the recurring reminder, which you confirm before it’s saved.

Frequently asked questions

Does time blocking work if my days are full of interruptions?

Yes, if you block less. Protect only one or two blocks a day, block your reactive time explicitly and keep a real buffer. Newport himself redraws the schedule every time it breaks rather than abandoning it.

Do I have to block every minute of the day?

Newport does for his workdays, but you don’t need to start there. Block your three weekly priorities and your batched small tasks first. Extend it later if it helps.

How long should a time block be?

No study sets an ideal length. For work that needs concentration, 60 to 120 minutes is a common range. For batched small tasks, 30 to 45 minutes is often enough. Test it and note what holds.

Time blocking or a to-do list?

Both. Your to-do list holds everything that exists; time blocking decides when you’ll do it. Each evening, pull from the list to fill tomorrow’s blocks.

In short

Time blocking turns a task list into appointments with yourself. Put down the fixed commitments, place three priorities in your best hours, batch the small stuff, leave buffers, and redraw the plan when it breaks. This Sunday, block a single two-hour slot for your top priority, then see what happens.

Sources

• Cal Newport, “Deep Habits: The Importance of Planning Every Minute of Your Work Day”, calnewport.com, 21 December 2013: calnewport.com.
• Cal Newport, Deep Work: Rules for Focused Success in a Distracted World, Grand Central Publishing, 2016; The Time-Block Planner, Portfolio, 2020: timeblockplanner.com.
• Marc Zao-Sanders, “How Timeboxing Works and Why It Will Make You More Productive”, Harvard Business Review, 12 December 2018: hbr.org.
• Roger Buehler, Dale Griffin and Michael Ross, “Exploring the ‘planning fallacy’: Why people underestimate their task completion times”, Journal of Personality and Social Psychology, 67(3), 366–381, 1994: doi.org/10.1037/0022-3514.67.3.366.
• Daniel Kahneman and Amos Tversky, “Intuitive prediction: Biases and corrective procedures”, TIMS Studies in Management Science, 12, 313–327, 1979.
• Sophie Leroy, “Why is it so hard to do my work? The challenge of attention residue when switching between work tasks”, Organizational Behavior and Human Decision Processes, 109(2), 168–181, 2009: doi.org/10.1016/j.obhdp.2009.04.002.
• Sophie Leroy and Theresa M. Glomb, “Tasks interrupted: How anticipating time pressure on resumption of an interrupted task causes attention residue and low performance on interrupting tasks and how a ‘ready-to-resume’ plan mitigates the effects”, Organization Science, 29(3), 380–397, 2018: doi.org/10.1287/orsc.2017.1184; University of Washington news release, 16 January 2018: washington.edu.
• Kostadin Kushlev and Elizabeth W. Dunn, “Checking email less frequently reduces stress”, Computers in Human Behavior, 43, 220–228, 2015: doi.org/10.1016/j.chb.2014.11.005.

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