There's a famous line, usually attributed to Charlie Munger: "The first £100,000 is a b*tch, but you gotta do it." Crude, but true. The first six figures are, by a wide margin, the hardest part of building wealth — and understanding why is the thing that keeps you going when it feels impossibly slow. Forget "first million" headlines for a second; the first hundred grand is where the real lesson lives.
Why the first £100k is so slow
Early on, your savings do almost all the work and compound interest does almost none. Put £10,000 in an index fund at 7% and it earns £700 in a year — nice, but nothing next to what your own saving adds. So it feels like pushing a boulder uphill with no help. The trap is quitting here, right before the physics flip in your favour.
Because once your pot is large enough, growth starts to rival and then dwarf your contributions. At £100k, a 7% year is £7,000 — potentially more than you managed to save that year. That's the moment your money quietly hires a second earner. But you only reach it by grinding through the unglamorous early stretch.
The three levers you actually control
- Savings rate. The biggest lever by far, and the one nobody can take from you. Going from saving 10% to 25% of your income does more than any stock pick ever will. Widen the gap between earning and spending.
- Time in the market. Not timing — time. Starting at 25 versus 35 can roughly double your end result for the same monthly amount, purely because compounding gets an extra decade to run.
- Boring, low-cost funds. A cheap, broad global index fund beats the overwhelming majority of active managers over the long run, and it costs a fraction. Boring is the strategy, not a compromise.
You don't need a genius investment. You need a decent one you'll actually stick with for twenty years. Consistency compounds; cleverness usually doesn't.
A realistic path for a UK 20-something
Say you're 25, saving £500 a month into a stocks-and-shares ISA in a global index fund averaging 7%. You'd cross £100k in roughly eleven to twelve years — around 37 — and, crucially, the second £100k arrives far faster than the first. Increase that £500 as your salary grows and the timeline shortens dramatically. This isn't a fantasy that requires a tech salary; it requires a habit and patience.
Start before you feel ready
The best day to start was years ago; the second best is payday. You don't need £500 a month to begin — £50 into an index fund today teaches you more than a year of reading, because it makes the abstract real. Automate it, ignore the daily noise, and let the boring machine run. The Simple Path to Wealth and A Random Walk Down Wall Street are the two books we'd hand anyone starting this climb — between them they'll save you from every expensive mistake we made first.