The cost of interruptions at work, and how to cut it

Key takeaways

The cost of interruptions at work is the focused time destroyed when calls, messages and colleagues break into someone's task. In a small business, most interruptions come from routine queries that land on whoever is nearest. Routing them to one place is the most effective fix.

• 30 minutes a day lost to interruptions is about 115 hours a year per person.
• At £19.81 an hour that is about £2,300 a year for one employee.
• Phones, shared inboxes and chat tools are the main sources.
• One front door for routine queries protects everyone else's time.

What counts as an interruption?

An interruption is any unplanned break in a task caused by someone or something else: a phone call, a message, a colleague's question or an alert. It differs from context switching in that the person did not choose it. Interruptions are the main cause of switching in most offices.

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• The cost of context switching in a small team

What do interruptions cost?

Interruptions cost the time of the interruption plus the time to get back into the original task. If that totals 30 minutes a day, it is about 115 hours over 230 working days. For an employee on £30,000, costing about £19.81 per worked hour, that is roughly £2,300 a year. In a team of eight it is over £18,000.

There is a quality cost as well. Work resumed in a hurry contains more mistakes, and mistakes create further interruptions when customers call back.

• The true cost of an employee in the UK

Where do they come from in a small business?

Most interruptions in a small business are routine and predictable. They feel random only because nobody owns them.

• The main phone line ringing on every desk.
• A shared inbox everyone watches and nobody owns.
• Customers messaging individual staff directly.
• Colleagues asking where something is or how to do it.
• Chat notifications for conversations that do not concern you.

• The cost of undocumented processes

How do you cut interruptions?

Cut interruptions by giving routine queries a single owner and giving everyone else protected time. The owner can be a person, a rota or an outside team, as long as it is clear.

• Send all first-line calls and messages to one owner.
• Write answers to the 20 most common questions.
• Agree quiet hours with notifications off.
• Hold internal questions for a daily 10-minute slot.
• Publish who decides what, so questions go to the right person.

• Outsourced inbox management

When are interruptions worth it?

Interruptions are worth it when speed matters more than the task interrupted: a customer with an urgent problem, a safety issue, a sales call. The answer is not silence. It is making sure the person interrupted is the right one, and that it is their job.

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How do you count interruptions without creating more work?

Count them with a tally sheet for two ordinary days. Each person makes a mark under one of five headings whenever they are pulled off a task: phone, email or message, colleague, customer walk-in, system alert. It takes seconds. At the end, total the marks by heading and by role. The pattern is usually obvious: one or two sources account for most of the marks, and one or two people receive most of them.

What does a single front door look like?

A single front door means every routine incoming query arrives in one place and is handled by one owner before anyone else sees it. That owner answers what they can from written guidance and passes on only what needs a specialist, with the details already gathered.

• One published phone number, email address and message channel.
• A named owner, or a rota, during working hours.
• Written answers for the common questions.
• A clear rule for what gets escalated, and to whom.
• A daily summary so nobody feels out of the loop.

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What about interruptions from inside the team?

Internal interruptions fall when people can find answers without asking. Most quick questions are about where something is, how a task is done or who decides. A shared folder with sensible names, short written procedures and a published list of who approves what remove the need for many of them. A fixed daily ten-minute slot catches the rest.

What does this look like in practice?

A pattern we see in trades offices: the estimator sits nearest the phone, so the estimator answers it. Quotes that need an hour of concentration are written in ten-minute fragments. Routing calls to a dedicated handler gets quotes out the same day.

• See client work
• BPO Solutions for UK businesses

Interruptions checklist

Run this over one week.

• Tally interruptions by source for two days.
• Identify the top three sources.
• Assign one owner for first-line queries.
• Write standard answers for common questions.
• Agree quiet hours and review after a fortnight.

• The hidden cost audit: score your business in an hour

Next step

Send us your top three sources of interruption. We will suggest how to route them in a 30-minute call.