This paper is concerned with the emergence in Britain in the early 199
0s of a large group of domestic mortgage holders with negative equity
(i.e. whose property had fallen below the value of the mortgage advanc
e used to purchase that property). The emergence of negative equity is
traced to the conjunction of the long-term trend towards wider home-o
wnership in Britain and the effects of deregulation of the financial s
ystem in the 1980s. Using individual records from a major building soc
iety, the temporal, geographical and social distribution of negative e
quity is assessed. The results suggest that negative equity was far mo
re likely to affect certain social groups living in particular places
and that these appear to be the people least well placed to 'help them
selves' out of debt. The concluding section attempts to draw out some
of the policy conclusions from these findings.