Speaking on a recent clip from his podcast shared on TikTok, the MoneySavingExpert founder said the real issue isn’t whether couples share accounts or keep finances separate. Instead, it’s something far less obvious – and far more important.
“The way you organise your accounts isn’t the key thing,” he explained. “What matters is: is one person making all the decisions and keeping everything in their head?”
According to Lewis, this can leave households exposed if circumstances suddenly change. He refers to these situations as the “three Ds” – “death, divorce and dementia.”
While difficult to think about, these moments can leave one partner unexpectedly in charge of finances they may not fully understand, adding pressure at an already stressful time.
To reduce the risk, Lewis says couples should focus on sharing financial knowledge – not just responsibility. One of his key suggestions is creating a simple financial fact sheet.
This should include a clear list of bank accounts, bills, providers and key contacts – everything from energy suppliers to insurance details – stored somewhere both partners can access if needed.
“It’s about having a long list of all your financial products and essential services,” he said, while also warning against including sensitive information that could pose a security risk.
He also recommends making money conversations a regular habit.
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“Every two or three months, have a kitchen table financial meeting,” Lewis advised. These informal check-ins give both partners the chance to understand decisions, ask questions and stay involved.
Financial experts say this kind of shared awareness is crucial. Many couples naturally fall into roles where one person manages the money – but without open communication, that can create problems later.
The message is simple: it’s not about how you split your finances, but how well you both understand them. And taking small steps now could make a big difference if life takes an unexpected turn.