Decisions
20 min

Regret minimisation

Project forward to old age and choose the path you would regret least from there, which reweights short-term fear against long-term loss.

Time cost
20 min
Output
Both regret answers, written, plus a survivability check.
Steps
5

Use when

  • The decision is genuinely irreversible and large.
  • Fear of a recoverable failure is dominating a choice with unbounded upside.
  • You will still be thinking about this in twenty years either way.

Do not use when

  • The decision is reversible. Regret framing inflates its weight enormously.
  • You use it often. It can justify almost any risk if applied loosely, and it is designed for rare, large choices.

Inputs required

  • An irreversible decision
  • A willingness to imagine the version of you that lives with it

Procedure

  1. 01

    Confirm the door is one-way

    If reversal is cheap, stop. This method’s weighting is wrong for a reversible decision and will push you into unnecessary risk.

  2. 02

    Project to the long view

    Imagine yourself at eighty, looking back at this moment. The distance is the mechanism: it strips the salience of near-term embarrassment.

  3. 03

    Ask both questions

    Would I regret doing this? Would I regret not doing it? These are different questions and people usually only ask the first.

  4. 04

    Distinguish regret from loss

    Failing at something you tried produces less regret than never attempting it, but it still produces loss. Both are real; only one is what this method measures.

  5. 05

    Check the downside is survivable

    Minimising regret is a valid rule only among options you live through. Run the ruin check before acting on the answer.

Characteristic failure mode

Applied to everything. The long view makes near-term costs look trivial, so used routinely it becomes a general argument for taking risks and stops discriminating between them.

Worked example

Someone is deciding whether to spend a year on a demanding qualification in mid-career.

  1. 01One-way door confirmed: the year is not returnable.
  2. 02Regret at eighty from doing it and it not paying off: small, and the year is remembered.
  3. 03Regret at eighty from not trying: identified as persistent.
  4. 04Ruin check: savings cover the year with three months' margin.

Result

Proceed. The ruin check is what made the regret answer usable, and it is the step most often skipped.

Where to go next