Financial abuse is the most common, and least seen, form of domestic abuse. It doesn't leave bruises. It leaves bank statements.
A study published this week in ‘Nature Human Behaviour’ by Trendl et al. — working with anonymized data from a major UK bank — has now mapped what that abuse actually looks like in the numbers. The team compared over 4,000 victim-survivors who had disclosed abuse to the bank with 12,000 matched controls, plus the wider bank population.
The fingerprints are stark.
Victim-survivors had £10,389 more in planned overdrafts on average than controls, savings balances £3,501 lower, and were 34.6 percentage points more likely to incur overdraft charges. They were also significantly more likely to be paying credit card interest (+5 pp), repaying loans (+9.6 pp), withdrawing cash (+4 pp), and applying for credit and loans — but not more likely to be _approved_ for them. Debt up, buffer down, credit-seeking up, access down.
Spending patterns tell a story of control, not poverty alone. When compared to women in similar financial distress, some behaviors persisted only for abuse: heavy spending on taxis (+12.3 pp) and petrol — markers of restricted mobility, fleeing, or being ferried. Victim-survivors logged into internet banking 10 more times per month than controls in the primary sample — hypervigilance — but when distress-matched, the pattern reversed. They actually logged in _less_ and relied more on human branch channels, suggesting barriers to safe digital access or more complex needs that an app cannot solve.
Crucially, the study warns against building a detection algorithm. The authors explicitly did not train a predictive model, because flagging "financial abuse" from transactions risks new harm.
Instead, the paper argues for design fixes. The UK's Universal Credit, paid into a single household account, is cited as structurally risky — it gives an abuser a single point of capture. Banks could redesign overdraft warnings, provide safe separate accounts, and train staff to recognize not just missed payments, but the choreography of control: constant small balance checks, frequent address changes, loan applications followed by immediate transfers out.
Abuse thrives in invisibility. For the first time, we can see it on a ledger.