Time Inconsistency
Why is it so easy to make a plan in advance, and so difficult to follow it when the moment arrives?
A decision is made calmly, and with clarity. Rules are set. Limits are defined. The intention is sound. But when the situation unfolds in real time, something shifts. The same plan begins to feel less certain. Small adjustments are made. What seemed straightforward in advance becomes more difficult to carry through.
This is where time inconsistency begins to influence behaviour. Preferences are not fixed across time. What feels like the right decision for the future can change when that future becomes the present. The trade-off between short-term comfort and long-term benefit is rebalanced, often without being fully recognised.
This idea has been explored in economics and behavioural science, including the work of George Ainslie and later David Laibson, who studied how people make decisions involving delayed outcomes. Their research showed that individuals tend to place disproportionate weight on immediate consequences compared to future ones. A choice that favours long-term benefit can be reversed when a more immediate alternative becomes available. The preference changes, even if the underlying reasoning has not.
In markets, this can be seen in the way plans are adjusted under pressure. A decision to hold through volatility may be reconsidered when losses begin to accumulate. A strategy to wait for a better entry point may be abandoned as prices move. The shift is not always driven by new information, but by the increasing weight of what is happening now.
What makes this difficult to recognise is how reasonable it feels. Adapting to changing conditions is often necessary. The challenge is that not all changes are responses to new information. Some are responses to the discomfort of the present moment, which can gradually pull decisions away from their original intent.
You may notice this in yourself when a plan that felt clear in advance becomes harder to follow in real time, or when immediate outcomes begin to carry more weight than longer-term considerations. There can also be a tendency to justify small deviations, even when they accumulate over time.
Time inconsistency does not mean the original plan was wrong.
It means the conditions under which it is tested are different from the ones in which it was made.