It is tempting to blame high house prices, soaring student debt and a precarious job market for the financial struggles of young adults in Britain. But there is a quieter culprit sitting at the kitchen table: their parents’ financial illiteracy.
The way mothers and fathers handle, or mishandle, money acts as an invisible tax on their children, constraining economic opportunity in subtle but lasting ways. It doesn’t appear in any budget but its cost compounds across a lifetime.
Financial behaviour is contagious. Children absorb attitudes towards money long before they manage a bank account, and the evidence suggests that what they are absorbing is of little value. A survey by the mutual society Shepherds Friendly found that 9 per cent of 18 to 24-year-olds could pass a basic financial literacy quiz, compared with 34 per cent of those aged 55 and over. And research by the bank Santander suggests only one in four young adults received financial education at school.
When parents avoid conversations about budgeting, credit and investing and instead treat money as if it is something between a taboo and a bore, children enter adulthood without the skills they need to navigate loans, rent and retirement savings. The silence is expensive.
Parents who live with anxiety, secrecy and shame around finances pass on that mood to their children. That produces two costly extremes: paralysis, where young adults avoid financial decisions altogether, or overcompensation, where they chase status spending to feel secure. Neither builds wealth.
The consequences show up starkly when it comes to financing higher education. In England the average graduate in 2024 owed £53,000 in student loans — a 10 per cent increase on the year before. Yet many parents do not understand repayment terms, interest accrual and the difference between Plan 2 and Plan 5 loans. Young people without informed guidance may overborrow, miss bursaries and choose courses without weighing up the long-term monetary viability.
A study published in 2025 by researchers at the Education University of Hong Kong found that improving parents’ financial literacy directly increased children’s chances of attending university, which suggests that money knowledge shapes future attainment of capital itself, not just how the bill is paid.
Housing illustrates the stakes most visibly. The Bank of Mum and Dad has become a defining feature of British homeownership in recent years. In 2024 more than a third of first-time buyers received deposit assistance from family, with gifts averaging £55,572. The total amount of loans and gifts from parents that year hit £9.6 billion.
But money without knowledge is a blunt instrument. Parents who borrow too much for a deposit, misjudge interest rates, or give lump sums at the wrong moment can trap children in unfavourable positions. Young people whose parents understand mortgages and shared equity schemes are buying their first home an average of two years earlier than those without that knowledge. They face not only delayed ownership but the compounding cost of lost equity — the main asset that anchors middle-class wealth.
Perhaps the least-discussed cost is the one that boomerangs: when parents fail to plan for their retirement, the bill eventually lands on their children. The financial services group Aegon surveyed 1,048 adults in 2024 and found that 55 per cent of those with living parents already supported or expected to support them financially in retirement, covering everyday bills, food and social outings. This is the Bank of Mum and Dad in reverse.
With 43 per cent of the working-age population failing to save adequately for retirement, according to the Department for Work and Pensions, the problem is set to worsen.
The sandwich generation of adults who are caught between supporting ageing parents — physically and financially — and raising children face projected lifetime costs running into the hundreds of thousands once you factor in the loss of earnings and pension contributions. A parent who never understood their pension and never built a financial cushion is not only underprepared for their own future — they are depleting their children’s.
Beyond these specific costs, research consistently shows that financial literacy is strongly associated with wealth accumulation and that the effect is large enough to imply meaningful gains from better education. Understanding Isas, pensions, tax efficiency and diversification matters. Parents who overlook these concepts hand their children a disadvantage that echoes across generations.
The remedy is neither handing down more cash nor lecturing children on compound interest. It is cultivating literacy through exposure — open conversations about household bills, demystifying student loans before sixth form, explaining your pension statement, introducing investing before the first payslip arrives. A parent who explains a mortgage application or admits they wish they’d started saving earlier is transferring something more durable than a deposit.
Inheritance is no longer only about cash. In an era when wealth inequality is widening and traditional paths to security feel out of reach, passing down financial acumen may be the most meaningful inheritance of all. The real tax on children is beyond what they pay. It is what they never learnt — and what they’ll one day cover for parents who didn’t learn either.
Megan King Diaz is a markets analyst with a decade of experience on Wall Street