What Is Buffer Time? Meaning, Examples, and How to Add It

What does buffer time mean?

Think of buffer time as a cushion on your calendar. It's time that you keep empty on purpose, right next to a meeting, so that nothing else can land there. A 15-minute buffer after a 30-minute call means your next meeting can start at :45 at the earliest, never at :30.

Here's the same morning with and without it. In both, the first call runs 10 minutes over:

Without a buffer, the overrun pushes the interview back, and every meeting after it starts late. With a buffer, the same 10 minutes disappear into the gap, and the interview starts on time.

A buffer is different from a break that you hope to take. When you add it in a scheduling app, the app treats the gap as busy, so nobody can book it. That's the part that makes it work.

Why buffer time matters

• One late meeting doesn't ruin the day. Meetings run over all the time. A buffer soaks up the overrun before it reaches the next person.
• You get time to prepare and follow up. Read the résumé before an interview. Write your notes after a sales call while you still remember what was said.
• Your brain gets a reset. In 2021, Microsoft's Human Factors Lab measured the brain activity of 14 people during four 30-minute video meetings. When the meetings ran back to back, stress built up from one meeting to the next. When each meeting was followed by a 10-minute break, it didn't, and people stayed more engaged.
• You have time to travel and set up. If you go from one site to another, or you need to clean a room or a chair between clients, the buffer is when that happens.

Buffer time examples

• A sales rep adds 15 minutes after every demo to update the CRM and send the follow-up email while the call is fresh.
• A recruiter adds 10 minutes before each interview to read the résumé, and 15 after to score the candidate.
• A coach or therapist keeps 10 to 15 minutes after each session for notes, so they don't pile up for the evening.
• A hairstylist leaves 15 minutes after each client to sweep up and set up the chair.
• A consultant who visits clients in person adds the drive time plus 10 minutes before each visit.
• A project manager adds 15 minutes after each meeting. The meetings start on time, and there's room to review notes and wrap up loose tasks.
• A software engineer keeps two 30-minute blocks free each day for urgent fixes. When nothing breaks, they get 2 quiet half hours of work.

How much buffer time should you leave?

For most meetings, 10 to 15 minutes after is enough. Use less after short internal calls, and more when you need to travel, take detailed notes or set up a room. Here's where we'd start:

Our advice: start with 10 minutes after every meeting. If you still run late, go to 15. If the gaps feel too long, go to 5. Change one type of meeting at a time, so you can tell what made the difference.

What buffer time costs you

Every buffer takes a slot that someone could have booked. This table shows the most meetings that fit in an 8-hour day, with a buffer after every meeting except the last:

A 10-minute buffer costs you 4 half-hour slots a day, or 1 hour-long slot. That sounds like a lot until you remember that nobody does their best work in meeting 16 of 16. If you need to protect your day even more, cap how many meetings people can book each day, too.

Buffer before or after a meeting?

• After is the one most people need. It catches overruns, and it gives you time for notes and follow-ups.
• Before is for things you have to do first: travel, setting up a room, testing your video, or reading up on the person you're about to meet.
• Both is for meetings that need both, such as interviews. Remember that the 2 add up. If one meeting has 15 minutes after it and the next has 15 minutes before it, the gap between them is 30 minutes, not 15.

Buffers don't make your meetings shorter. Some calendar apps offer a different fix that does: they end every meeting 5 or 10 minutes early. You'll see both kinds below.

How to add buffer time

In Google Calendar

Google Calendar has 2 settings, and they do different jobs.

For a booking page (appointment schedule):

1. Open your appointment schedule and click the pencil icon to edit it.
2. Open Booked appointment settings.
3. Check Buffer time ("Add time between appointment slots") and enter the minutes.
4. Click Next, then Save.

It's free, but there's 1 buffer for each schedule, not a separate one before and after. A free Google account gets 1 booking page, and it checks 1 calendar for conflicts. Our guide to Google Calendar appointment schedules has every step.

For all your meetings (Speedy meetings):

1. Click the gear icon, then Settings.
2. Under General, open Event settings.
3. Check Speedy meetings: "End 30 minute meetings 5 minutes early and longer meetings 10 minutes early".

Speedy meetings works on the new events you create, so a 30-minute meeting ends at :25. It doesn't add a gap, and it doesn't stop anyone from booking the time right after.

In Outlook

Outlook doesn't have a buffer setting, but it can shorten every meeting you create.

New Outlook and Outlook on the web:

1. Go to Settings > Calendar > Events and invitations.
2. Under "Events you create", check Shorten duration for all events.
3. Pick End events early or Start events late.
4. Choose the minutes for "Less than one hour" (0, 5, 8 or 10) and "One hour or longer" (0, 5, 10 or 15), then click Save.

Classic Outlook for Windows: go to File > Options > Calendar, check Shorten appointments and meetings, pick "End early" or "Start late", choose the minutes and click OK.

The setting is saved for each email account, so set it in each account you use. Like Google's Speedy meetings, it only trims the meetings that you create.

On your booking page in zcal

Calendar settings trim your own meetings, but they can't stop a client from booking the minute your last call ends. A buffer on your booking page can. In zcal, a free scheduling app, every booking link has its own buffer before and after:

1. On your zcal home page, click the pencil icon on the booking link you want to change.
2. Click Next until you reach Availability options.
3. Pick a Buffer before event and a Buffer after event: 5, 10, 15 or 30 minutes, 1, 2 or 4 hours, or "Custom…" for any time up to 4 hours.
4. Click Save.

From then on, zcal only offers times that leave the gap you set, next to anything on the calendars you connect: Google, Outlook or Apple, not only your zcal bookings. So a sales demo can have 15 minutes after it, and a quick check-in only 5.

Buffers are free on every plan, and they work on 1-on-1, group, collective and round robin links. The same screen has the settings that pair well with a buffer: a minimum notice, so nobody books you 10 minutes from now, and a cap on bookings each day or week. Create a free booking page, or see what else a zcal booking page can do.

Other scheduling apps have buffers too. In Calendly, for example, they're on every event type under More options > Limits and buffers.

Buffer time vs padding time

In a scheduling app, they're the same thing. Some apps, such as Acuity Scheduling and Picktime, call the gap between appointments "padding" instead of "buffer".

Outside of a calendar, "padding" can mean 2 other things:

• Schedule padding in project management is extra time added to a task estimate, so a late task doesn't push the deadline.
• Padding hours on a timesheet means logging more hours than you worked. That's not a buffer. That's a problem.

Other words for buffer time: padding, cushion, breathing room, transition time and changeover time.

Common buffer time mistakes

• Your calendar isn't connected. A booking app can only leave a gap next to meetings it can see. Connect every calendar that has meetings on it.
• One buffer for everything. A quick check-in and a 2-hour workshop need different gaps. Set the buffer on each booking link.
• Stacking without meaning to. A 15-minute buffer after one meeting and 15 before the next makes 30. Pick one side unless you need both.
• Trusting "end early" to protect your time. Speedy meetings and "Shorten duration" trim your own meetings, but they don't stop anyone from booking the time right after.
• Forgetting what buffers cost. Every buffer is time that nobody can book. If your open times look too thin, use a shorter buffer before you remove it.

Frequently asked questions