What if I invest more later to make up for the delay?

You can close some of the gap, but rarely all of it — the issue isn't just the money not invested during the delay, it's the compounding time that money never got. Try the calculator with a higher monthly amount for the delayed path to see how much more you'd actually need to invest each month to catch up.

Is this realistic, or does it assume a perfectly smooth return?

It assumes a constant annual return for simplicity, which real markets don't deliver — any single period can run well above or below the long-term average. The point isn't the exact figure, it's the shape of the result: delay costs disproportionately more than the length of the delay itself suggests.

Does the order of the delay matter — early vs late?

Yes, a lot. A delay at the start of a long horizon costs far more than an identical-length pause taken near the end, because the paused money would otherwise have compounded for the full remaining period. This calculator models delaying the start, which is the worst-case version of a pause.

What's the actual lesson here?

Starting with a smaller amount today usually beats waiting to start with a larger one — because time invested is doing more of the work than the size of any single contribution. See the Compound Interest lesson for the same point made with a worked example.

Investment planningWorks worldwide

Cost of Delay Calculator

See what waiting a few years to start investing actually costs — not just in advice.

Monthly investment$1,000

Expected return (p.a.) %8%

Sample value. Enter your own.

Total horizon (Years)25 Years

Years you'd delay starting5 Years

What the delay costs you

$364,420

Starting now (25 yrs invested)$957,367

Starting in 5 yrs (20 yrs invested)$592,947

Illustrative only — both paths invest the same monthly amount at the same assumed return; only the start date differs, and the end date is fixed.

What does this calculator show?

Everyone's heard "start investing now, not later" as advice. This calculator turns it into a number: the same monthly amount, the same assumed return, and the same end date — the only difference between the two paths is how many years late the second one starts.

Because the money that's invested, instead of delayed, compounds for longer, the final values aren't just "a bit different" — the gap grows faster than the length of the delay itself would suggest.

How is the cost of delay calculated?

Both paths use the same future-value-of-a-SIP formula, just over different lengths of time:

Cost of delay = FV(monthly, full horizon) − FV(monthly, horizon − delay)

$104 a month at 12% for 25 years reaches about $197,354. Delay the start by 5 years — so the same $104 a month is invested for only 20 years, reaching the same end date — and the total drops to about $103,911. The 5-year delay costs roughly $93,443, which is more than the entire amount that would have been invested over those 5 years ($6,240) many times over — almost all of that cost is lost compounding time, not lost contributions.

Why this is worth knowing

Makes procrastination concrete

'I'll start next year' is easy to say; seeing the actual cost of that one year is harder to brush off.

Shows why small amounts now beat bigger amounts later

A modest SIP started today often outgrows a larger one started a few years from now, because time compounds every unit invested, not just the newest ones.

Useful for a real decision, not just motivation

Weighing a genuine reason to delay — clearing debt first, building an emergency fund — against a real number, rather than a vague sense that 'later is fine.'

Works the other way too

The same math shows what starting a few years early, instead of on schedule, is worth — useful when deciding whether to redirect a bonus into investing sooner.

LessonCompound Interest — Understand how time, consistency and returns interact — the single most important idea in personal finance.
CalculatorSIP Calculator — What a recurring monthly investment grows to over time.

Common questions

Because the years you lose are the ones compounding would have worked on the longest — money invested early doesn't just have more years, those early years are also the ones multiplying every later year's growth. Losing the first 5 years of a 30-year plan costs far more than losing any other 5-year stretch in the middle.