Multitasking: why it makes you LESS productive

You feel like a machine: replying to chat while writing the report, one eye on email and an ear in a meeting. Productive, right? The reality is the opposite: you end the day exhausted, everything half-done, with the feeling you got nowhere. Multitasking feels like a superpower, but it's one of the most expensive lies we believe. Here's why, and what to do instead.

1. Your brain doesn't do two things at once, it switches

What you call "multitasking" isn't doing two things simultaneously: it's jumping very fast between one and the other. Every jump has a cost, because your brain has to reload the context of the task you return to. That constant reset is invisible, but it adds up. You're not doing two things at once, you're doing them badly in turns.

2. You're slower and make more mistakes

The research on task-switching is consistent: jumping between activities can make you take noticeably longer to finish and multiplies errors. You notice it in everyday life:

• You reread the same paragraph because you interrupted yourself to reply.
• You send the message to the wrong person.
• You forget what you were going to do when you switched tabs.

What you save by "doing it all together" you pay back with interest in corrections and rework.

3. It kills deep work

The tasks that truly matter (thinking, creating, solving problems) need sustained concentration. Multitasking makes it impossible to reach that state of deep focus, because every notification pulls you out right as you were finding your rhythm. That's how you can be "busy" for eight hours and produce nothing of real value.

4. Work in single-task blocks

The alternative is called single-tasking, and it's as simple as it is uncomfortable at first:

• Pick one single task and work on it with nothing else open.
• Close tabs, mute notifications and leave your phone far away.
• Decide how long the block lasts and only then check everything else.

Batch the small stuff: answer all messages and emails at two or three set moments a day, not constantly. That way chat stops governing your attention.

5. A short list ordered by priority

Multitasking is often born from the fear of forgetting something, so we jump from task to task out of anxiety. Take that job off your head: write down the 3 most important things of the day and do them in order, one at a time. Finishing one thing well is worth more than nudging ten things halfway.

Dropping multitasking isn't about knowing it, it's about holding your focus when the urge to "just quickly check" kicks in. That's where Cero Excusas helps: it reminds you on WhatsApp about the focus block you committed to, asks if you kept it without getting distracted, and if you ignore it, it calls you. Because doing one thing at a time sounds easy, but holding it every day is what actually makes you productive.