Compounding Calendar: What a Weekly Half-Hour Actually Costs You by December

The Tuesday 10am catch-up has been in the calendar since 2023. Nobody scheduled it this year. Nobody has questioned it this year either. Six people, half an hour, a shared document that three of them opened late on Monday night. By Friday it has quietly cost your business more than the coffee machine.

That is not a rhetorical flourish. It is arithmetic — and the arithmetic is the part almost nobody does.

The half-hour that is never half an hour

A recurring meeting does not cost you its stated duration. It charges interest. The stated 30 minutes is the principal; everything around it is the rate.

Think about what actually happens. Someone opens the shared doc on Monday evening to see what was decided last week. Someone else spends ten minutes wondering whether they need to bring the figures. Everyone arrives, waits ninety seconds for the last person, spends three minutes on the pre-amble, and then leaves with a slightly different mental model of the week than the one they had at 9.55am. That last bit — the reloading of whatever they were doing before — is the expensive part, and it never appears in the invite.

For a six-person, 30-minute weekly meeting, a realistic tally looks like this:

• Time in the room: 3 hours a week
• Preparation and document reading: roughly 1 hour
• Recovery and context-switching: roughly 1–3 hours, depending on how deep the work was

So the true weekly figure is somewhere between five and seven hours. Multiply that by roughly 45 working weeks in a UK year — after statutory holiday and bank holidays — and you are looking at 225 to 315 hours. That is a person and a half, in a room, talking about last week.

What an hour of your team actually costs

Hourly rates are where most meeting audits fall apart, because people reach for salary divided by 260 and call it a day. Salaries are not costs. Employment is.

A rough, defensible calculation for a UK small business:

1. Take a salary, say £42,000.
2. Add employer National Insurance and pension contributions — call it £7,000.
3. Add a share of overhead: desk, software, management time, finance, insurance — call it £14,000.
4. That gives a fully loaded cost of about £63,000.
5. Divide by productive hours, not contracted hours. Forty-five weeks at roughly 35 genuinely available hours each gives about 1,575.

That lands around £40 an hour, rounded. Which means the meeting above is costing you between £200 and £280 every week, or somewhere in the region of £9,000 to £12,600 a year. For one meeting. That has never been reviewed.

Recurring meetings are the only line item in most small businesses that gets renewed automatically, forever, without anyone signing anything.

The four-session test

You do not need a consultancy framework. You need a fortnight of honesty.

Pull up your calendar and list every recurring event. For each one, record four things: the attendee count, the stated duration, whether it has a named owner, and whether it has a review date. Then, over the next four sessions, keep a one-line log after each: what changed as a result?

A meeting earns its place if at least two of those four sessions produced one of the following:

• A decision that would not otherwise have been made
• Someone unblocked who was genuinely stuck
• A plan that was altered because of what was said

If four sessions produce nothing but updates that could have been read, you are not running a meeting. You are running a subscription.

Downgrade before you delete

Cutting a meeting entirely tends to cause a small panic, and panic produces new meetings. A gentler sequence works better in most UK teams:

Shorten first. Most 60-minute meetings have 20 minutes of content and 40 minutes of habit. Drop the default to 25 minutes and watch how much fills the space.

Move the update out of the room. Anything that is purely information — progress, numbers, the week ahead — goes into a written note circulated beforehand. If nobody reads it, that is useful evidence too.

Give every recurring meeting an owner and an expiry date. Twelve weeks is a reasonable default. At the end, it has to be renewed deliberately, by a person, with a reason.

Protect one block of deep time. Whatever you reclaim from the calendar needs somewhere to go, or it will be reabsorbed by the next invite. Put it in the diary as if it were a client.

Start with the one you dread

You already know which meeting you would cut. It is the one where you check your phone under the desk, the one that survives on the fact that nobody wants to be the person who cancels it.

Put it through the four-session test this month. If it fails, shorten it, write it up, or let it go — and put the hours back where they compound in your favour.