Starting to invest after 30: what you can and cannot catch up

Thirty is not late, but it is late enough that the arithmetic stops being theoretical. The same 500 a month a 25-year-old can set and forget produces a different number for you, and the gap is measured in hundreds of thousands rather than in rounding. The expensive mistake is to read that number and conclude that the only variable left is risk.

The arithmetic of a late start

Run it once, properly: 500 a month, 7% a year compounded monthly, contributions until 65.

• Start at 25: about 1,312,000.
• Start at 30: 900,000.
• Start at 35: 610,000.
• Start at 40: 405,000.
• Start at 45: 260,000.

Five years of delay between 25 and 30 costs roughly €412,000, while the contributions you skipped in those five years add up to €30,000. That ratio is the whole case for starting early, and it is also why a late start feels hopeless. It is not hopeless. It is more expensive per month.

Every decade of delay roughly halves the end balance. That is not a slogan, it is what the series does: 1,312,000 becomes 900,000, then 610,000, then 405,000, then 260,000. Notice what stays constant. The monthly amount does. A 45-year-old and a 25-year-old put in the same 500 with the same effort; one of them has twenty extra years of compounding sitting behind an identical decision.

Flip the question around. To reach 500,000 by 65 at the same 7%, you need 278 a month starting at 30, 410 starting at 35, 617 starting at 40 and 960 starting at 45. The target is fixed. The payment is not.

The US tax code concedes one thing to late starters: from the year you turn 50, a 401(k) accepts an extra 7,500 on top of the ordinary deferral, and there is a larger catch-up between 60 and 63. Useful, and small beside the gap that five years of delay opens. Treat it as a nudge rather than a rescue.

What you cannot catch up

Years cannot be bought back, because they were already spent at whatever savings rate you had at the time. Almost everything else about a late start is negotiable. The length of the runway is not.

Look at the shape of the trade. A 45-year-old can reach the 500,000 target with 960 a month, or keep paying 500 and accept 260,000. There is no third option in which the same 500 buys the same outcome, and no fund, no adviser and no market call creates one.

The monthly requirement more than triples between 30 and 45. That is what catching up means in practice: not recovering the lost decade, but paying a higher price per month for the same destination.

The statutory rules are not built around that problem. For 2025 the 401(k) elective deferral limit is 23,500 and the IRA limit is 7,000, each with a catch-up from age 50 — 7,500 in the 401(k), 1,000 in the IRA. These are the most late-friendly numbers in the US system, and every one of them assumes the account already exists. At 45, opening it is the decision that gets more expensive to postpone.

Why more risk is not a catch-up mechanism

The reflex after doing this arithmetic is to compensate for it: concentrated positions, options, a fund that doubled last year. Each of those widens the range of outcomes. None of them adds a year.

How much risk you can carry is a function of the time remaining, not of the size of the shortfall. A 100% equity allocation is defensible when the money will not be touched for thirty years and contributions keep arriving through a bad one. With five years to go, the same allocation is a different instrument, because the order in which returns arrive starts to matter more than their average. Two portfolios can post the same decade average and finish far apart, purely because the weak years came first, and an investor with five years left has no room to wait that out.

What a late starter can use instead is the savings rate, which is a decision rather than a forecast. It has no bad years.