Known Costs with Unknowable Benefits
- Difficulty
- Easy
- Time to result
- ~months to results
- Steps
- 5
- Confidence
- —
Nat Eliason's heuristic for big life decisions that people defer indefinitely. The asymmetry is that the costs of committing — to a partner, to children, to a training habit — are fully visible in advance, while the benefits are literally unknowable until you are inside the experience. Because the mind can only weigh what it can see, the visible costs dominate and the decision looks worse than it is. The correction is a signal check: if a lot of people seem to draw a quiet, non-performative satisfaction from something that carries real, known costs, the hidden upside is probably large, and the price is probably worth paying. Complaints are loud and posted online; quiet satisfaction is not, so the available evidence is systematically biased toward the cost side.
Origin
Extracted from Deep Dive with Ali Abdaal
How to run it
- 1
Name the commitment you keep deferring
Pick the specific decision you have been postponing — moving in together, marriage, a first child, a consistent exercise habit — rather than the vague category of 'settling down'.
Pro tip If you can generate a fresh reason to wait each year, that is the tell that the reason is not the real blocker.
- 2
Write out the known costs explicitly
List what you can actually see: lost schedule control, worse sleep for a period, less time with certain friends, the hours the habit will take. These are real and should be named, not dismissed.
Watch out Do not inflate this list to justify a decision you have already emotionally made.
- 3
Check for the quiet-satisfaction signal
Ask whether people who have made this commitment appear to draw a steady, understated satisfaction from it. That signal, paired with meaningful known costs, is the marker of large hidden benefits.
Pro tip Ask people privately rather than reading public posts — the satisfied are usually not posting.
- 4
Discount the online complaint sample
Recognise that the visible commentary on marriage, parenting or discipline skews toward people who are unhappy for other reasons. Treat that stream as an unrepresentative sample rather than as evidence.
Watch out Complaint volume is a measure of who posts, not of how the experience actually goes.
- 5
Pay the price and stay in long enough to feel the return
Commit and then hold for a horizon long enough that the unknowable benefits can surface — three, six, twelve months for a habit; years for a family decision. The upside only becomes legible from the inside.
Pro tip Judge the decision at the far end of the horizon you set, not during the costly early weeks.
Watch out Exiting during the known-cost phase guarantees you only ever experience the costs.
In the wild
Nat describes the decision to commit to a partner as the cleanest case of the pattern. Before committing, all you can see is the cost column: you lose full control of your schedule, you cannot date other people, you have to prioritise someone else alongside yourself. Those costs may look shallow written down, but they are the only concrete data available. The benefits — what the relationship actually does for your life — cannot be evaluated from outside it. He and his wife stopped weighing the ledger and committed, then found the balance looked nothing like the pre-decision estimate.
→ Marriage, then children, on a timeline he describes as far earlier than his demographic norm, and no regret about the trade.
Nat uses training as the everyday example. Carving out calendar time, getting sweaty and doing the run are all fully knowable costs — you can price them precisely before starting. What you cannot price is how you might feel after three, six or twelve months of consistency. He argues that people abandon exercise not because the cost is high but because it is the only side of the equation they can see. Staying in past the point where the benefit becomes felt is what flips the calculation.
→ The habit is judged on lived benefit rather than pre-commitment cost estimates, which is the only frame in which it survives.
Common mistakes
Weighing costs and benefits as if both were visible
Standard pros-and-cons reasoning silently assumes both columns are knowable. When one column is structurally invisible, the exercise always returns 'wait', which is why the decision never resolves.
Treating online complaints as data
People who are happily inside a commitment rarely post about it. Using visible commentary about marriage or parenting as evidence samples almost exclusively from the unhappy tail.
From the transcript
“some of the best parts of life I think are things that you cannot appreciate or understand until you experience them I call these like…”
“the best improvements to your life have these known costs but you don't know how great the benefits are going to be”
“exercise is another great one right carving out time in your calendar to go for a run getting sweaty doing the actual running or whatever…”
From the episode
Chasing Success vs True Fulfilment - Nat Eliason
Nat Eliason