Four levers, and their relative strength

There are four ways to reach a number sooner. Put more in. Earn more on what is already there. Need less at the end. Wait longer.

Everybody knows all four. Almost nobody has checked which one is strongest, and the answer is not the one that gets most of the attention.

Rank them before you look

A starting balance of 5,000. Three thousand a year going in. A 5% return. A target of 50,000, which arrives in year eleven.

Predict

Which single change reaches the target soonest: doubling the contribution, tripling the return, or halving the target?

Choose one answer

Doubling what goes in each yearTripling the return, from 5% to 15%Halving the targetAll three land within a year of each other

Lock in answer

Prove the ceiling

Below, the contribution is locked at 3,000 a year and the deadline is five years. Two controls move: the return, and the target.

One of them can do it. The other one cannot, at any setting it is allowed to take. Find out which.

Time to a goal

≈ Hypothetical model, not a forecast

Years until a balance reaches a target, and the contribution that would reach it exactly on time.

It assumes

• Contributions arrive once at the end of each year, in equal amounts.
• The return is exactly the same in every year of the projection.
• The target is a fixed number that does not move with prices.
• Nothing is withdrawn and nothing interrupts the contributions.

It ignores

• Tax and fees, both of which push the date later
• Inflation eroding the target while you save towards it
• Any change in how much can be contributed

Reach the target within five years. The 3,000 a year cannot move, so only the return and the target are available.

Target50,000

Annual return5%

Years to the target

11

Target reached inside the horizon

1

Balance at the horizon

56,731

Total paid in

36,000

Yearly amount that lands exactly on target

2,577

• Balance
• Target

◷ Not there yet — keep moving the controls.

At the maximum return the control allows — a rate nobody should expect and nobody can promise — five years of this contribution still lands short of 50,000. The return lever has a ceiling, and over five years the ceiling is low. The target does not have one.

Check

Over a forty-year horizon rather than a five-year one, which lever becomes the strongest?

Choose one answer

Still the target, since it is the only one that shortens the distanceThe return, because it has a large base to work on by thenThe contribution, because forty years of it adds upWaiting longer, since time is free

Check answer

›Why the levers are usually tried in the wrong orderOptional

The return is the lever with the most content attached to it. There are industries, publications and entire social identities built around choosing between holdings, and none built around not buying something.

It is also the only one of the four that can be improved by learning rather than by giving anything up, which makes it the most pleasant to work on.

Over a horizon of a few years, it is the weakest of the four. Over a horizon of decades it is the strongest. The order to try them in depends entirely on the deadline, and the deadline is the number people are least likely to have written down.

Worth remembering

• There are four levers on time-to-goal: contribute more, earn more, need less, or wait longer.
• Three of them change the speed; only lowering the target changes the distance.
• Roughly: over a short horizon, halving the target beats doubling the contribution, which beats tripling the return.
• Over a horizon of decades the ranking reverses, because compounding needs a large base before the rate matters most.
• Any claim about which lever is strongest is meaningless without a horizon attached to it.