Can Millennials Retire as Millionaires? Vanguard Data Reveals What It Takes

Most millennials are nowhere near a millionaire's retirement pot today, but Vanguard's newest data suggests many could still reach one by the time they stop working. The figures, drawn from the firm's 'How America Saves 2026' report and modelled into retirement projections by the financial site Investopedia, point to a single decisive factor: the share of salary a worker sets aside each year, combined with the decades left for that money to grow.

Investopedia's analysis modelled two savers, one aged 30 and one aged 40. Each started from the median Vanguard balance for their age group, and each was tested at three total contribution rates: 10%, 12%, and 15% of salary. The projections assumed a 7% average annual return, pay rising 2% a year, and retirement at 65.

For the 30-year-old, every rate cleared $1M (£738,000). A 10% contribution reached $1.24M (£915,000) by 65, 12% produced $1.45M (£1.07M), and 15% pushed the total to $1.76M (£1.30M). The head start of an extra decade allowed even the lowest rate to pass the seven-figure mark.

The 40-year-old faced a tighter margin. At 10%, the projection came to $785,000 (£579,000), and at 12% it reached $891,000 (£657,000), both short of the target. Only a 15% contribution rate carried the total past $1M, to $1.05M (£774,000).

What Vanguard's Data Shows Millennials Have Saved

The starting positions are modest. Vanguard reported that younger millennials, aged 25 to 34, held a median of $18,732 (£13,800) in defined contribution plans, the 401(k)-style workplace accounts most American workers use. Older millennials, aged 35 to 44, held close to $47,000 (£34,700). Both figures were higher than a year earlier, when the medians stood at $16,255 (£12,000) and about $40,000 (£29,500).

The median marks the midpoint, with half of savers above the figure and half below, so it is not inflated by a small number of very large accounts. For millennials, it also captures only part of the picture, because most of any eventual balance depends on contributions still to be made rather than on money already saved.

Across all Vanguard savers, the average participant balance reached a record $167,970 (£123,900) at the end of 2025. The median was $44,115 (£32,500), a gap that shows how far a typical account sits below the average.

The report is the 25th annual edition of 'How America Saves', which Vanguard has published since 2001 and which draws on the retirement behaviour of nearly five million participants. Plan participation climbed to a record 86% among eligible employees. Lauren Valente, a managing director in Vanguard's Workplace Solutions arm, said automatic enrolment and default contribution options had made saving 'more accessible and effective for more Americans than ever before.'

The Moves That Decide Whether Millennials Retire as Millionaires

The modelling points to the contribution rate as the main variable within a saver's control. Raising it by one percentage point a year, or at each pay rise, lifts the eventual balance without a sharp cut to take-home pay.

Employer contributions also affect the total. A 15% rate can come entirely from the worker, or from a 10% personal contribution topped up by a 5% employer match, which means a match left unclaimed lowers the amount invested each year.

Early withdrawals work against the same goal. Vanguard recorded hardship withdrawals rising to 6% of participants in 2025, a record and up from 1.7% in 2020, with a median withdrawal of about $1,900 (£1,400). Money taken out early stops compounding, which reduces the final balance by more than the sum withdrawn.

The projections are estimates rather than forecasts. They assume steady returns, rising pay, starting salaries of $60,000 (£44,300) at 30 and $70,000 (£51,600) at 40, and contributions left untouched until 65.

They do not account for inflation, tax, fees, market swings, or changes in income or savings rates. On Vanguard's own figures, though, a millionaire retirement remains within reach for millennials who still have decades of contributions left.