Last year, before the UK plunged into recession, it took two weeks less to reach that point.
Brits currently owe a total of £88.5bn through credit cards, loans and additional borrowing against their homes.
Credit card debt accounts for the bulk of that figure - £59.8bn.
During the past year, loan debt has risen by £1.6bn, while withdrawal of equity has jumped by £6.5bn.
However, credit card borrowing has fallen slightly, dropping by £4.9bn.
March 25 has been dubbed Debt Freedom Day by the firm that commissioned the research, Unbiased.co.uk.
Chief executive David Elms said: "It takes a date like Debt Freedom
Day to bring home just how much we are spending as a nation on debt.
"Hopefully it will spur people into action to do something about their borrowing."
:: The research was based on analysis of figures from the Bank of England and the British Bankers' Association.