The 88-year-old chain has failed to keep pace with rivals such as Marks and Spencer selling clothing and homeware in stores and online, resulting in a significant loss of market share.
"The group will continue to trade as usual whilst the administrators seek to sell it as a going concern," administrators Duff & Phelps said in a statement.
BHS, which also sells food, has been undergoing restructuring but has been unsuccessful in negotiations to find a buyer, while property sales have not materialised as expected, Duff & Phelps added.
"The directors therefore have no alternative but to put the group into administration to protect it for all creditors."
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Owner Dominic Chappell, whose consortium Retail Acquisitions purchased BHS last year from retail entrepreneur Philip Green for just one pound (USD 1.4, 1.3 euros), said no-one was to blame.
The current situation "was a combination of bad trading and not being able to raise enough money from the property portfolio", he added.
Neil Saunders, head of retail consultancy Conlumino, said today's announcement ends "a long period of decline which has seen the chain fall out of favour with British shoppers thanks to its failure to respond to changing tastes and the intensification of competition (from rival stores) on the high street".
"Although not all of these visitors would use BHS as their main store, many would buy one or two products -- helping BHS attain a respectable 2.3-per cent share of the clothing market.
Saunders said that last year, BHS pulled in only 8.2 per cent of all clothing shoppers, handing it a 1.4-per cent share of the clothing market.
Starting in 1928 with a chain in London, BHS has grown to stand at 164 stores and 74 franchise operations across 18 countries.