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ADHD glossary · Family perspectives

Buffer time

Buffer time is a margin deliberately left unassigned between parts of a plan. It is not another task, a promise that delays will fit, or a hidden earlier deadline imposed on someone else.

By RDY Editorial · Prepared

General education and practical perspectives. Editorial standards.

The practical question is: Where have we left room for the plan to vary? A task estimate is a guess about how long the task itself will take. A buffer is the extra space you choose not to fill. Writing the two separately makes that choice visible.

An example: getting ready for a library visit

In this invented plan, Casey and their adult sibling Drew have arranged to leave home at 10:00. They estimate that gathering their selected books will take 10 minutes and putting on their outdoor things will take 5. They choose to begin at 9:30, leaving 15 minutes unassigned before departure.

Their plan is:

  • 9:30–9:40: gather the books already selected.
  • 9:40–9:45: get their own things ready.
  • 9:45–10:00: buffer; no additional job has been promised.
  • 10:00: intended departure.

These numbers are invented to show the distinction, not recommended preparation times. When Casey suggests using the buffer to sort the whole bookshelf, Drew says that would add a task to the plan. They can choose to do it, but then that time is no longer a buffer.

At 9:50, they discover a selected book is elsewhere. They decide whether to look for it or bring it on another visit. The margin gives them an unassigned part of this particular plan; it does not require Drew to search or guarantee a 10:00 departure.

Mark the margin honestly

Try this note for one ordinary outing or activity:

Our actual agreed start/departure: ___

Tasks that must happen beforehand: ___

Estimate for each task: ___

Unassigned margin we choose: ___

Who has agreed to be available during it: ___

Optional work we will leave for another time: ___

If the margin is used up: We will choose between ___ and ___.

Work backward from the actual agreed time using the estimates and chosen margin. Include only people's agreed availability. An adult cannot create more time in a plan simply by writing an earlier arrival for someone who has not accepted it.

When a buffer becomes a point of disagreement

A parent may want spare time before a family outing while a teenager wants a clear answer about when they actually need to be ready. State the real departure and discuss the preparation start openly. A partner may have another commitment immediately beforehand; their schedule may leave no margin. The answer may be to remove an optional stop or move the outing, not insist that they produce more time.

After the activity, ask whether the estimates, sequence, or start time need changing. A margin used once is not proof that the same amount will fit next time. Unused time is not evidence that someone chose badly, either.

If an agreed margin repeatedly becomes extra work, relabel that work and make a new plan. If the plan runs out of time, revisit it without turning the clock into a judgment about a person. This is an ordinary scheduling example, not guidance for urgent, medical, or safety-critical timing.

Updates and corrections

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