Where AI saves time

AI saves time, though less than it promises. When it should save an hour, it saves about 25 minutes.¹ The rest goes on tasks AI gets wrong and on checking its work.

Right answers save the most time

When AI gets a task wrong, the time spent on it is lost, and then you still have to do the job. This is the biggest loss, about 20 minutes of each promised hour.¹ It shows at work too.

About one task in six takes longer with AI than without it.²

Checking and fixing take about 15 minutes of the promised hour.¹ Most fixes are small.

People use two thirds of what AI produces as it is or with small changes.

About a quarter needs bigger changes, and one piece in twenty is mostly redone.²

So the quickest way to save more time is to give AI the tasks it gets right.

Writing and office work give the most back

How often AI gets a task right depends on the kind of task, so the saving differs from one use to another. The white paper How much time AI really saves measures it for writing, office work, code, study and personal advice.¹

Writing that people send out, such as letters, posts or CVs, returns the biggest share of the time AI promises, up to half.

AI rarely gets this kind of task wrong. Long office tasks, such as reports and presentations, save the most hours. AI gets them wrong more often than writing, but each success saves a lot of time. Code saves the least. AI gets it wrong more often, and coding tasks are short. Outside work, advice on health, money or shopping is the most common use, and it saves fewer hours per conversation than office work.¹

At work, AI now takes over jobs that used to go to a colleague or a contractor. Data analysis is the most common case, followed by reading documents and keeping records.²

Giving AI a whole task also saves time more often than asking it to help with one part. People saved time on about half of the tasks AI did whole, and on about a third of those where it helped with a part.

When AI works alone, people set the pace

At Anthropic, the company that makes Claude, AI agents work six hours for every hour its staff work.³

Reading everything they produce would take even non-technical staff half their week. Staff also spend about a fifth more time in meetings than before, because the work that still needs people needs more talking.

Anthropic is a special case. Still, once AI does the job alone, the saving depends on how fast people can check what it hands back.

Saved time can fill up with other work

In one study of 10,584 people, the time they spent on every kind of work grew after they started using AI.⁴ Time on email doubled. Time on chat and messaging grew by 145%. Their periods of focused work got shorter. The study does not show that AI caused this, but these people’s days got fuller.

What decides the real saving

• AI saves the most time on tasks it gets right, with work that is quick to check.
• Writing and long office tasks give the most back.
• Whole tasks save time more often than small pieces.
• When AI works alone, people need time to review what it hands back.
• The saved hours count only if they stay free, instead of filling up with more messages.