The rupee depreciated 12 paise to 81.86 against the US dollar in early trade on Monday, tracking the strength of the American currency in the overseas market and a muted trend in domestic equities. At the interbank foreign exchange, the domestic unit opened at 81.84 against the dollar, then lost ground to quote at 81.86, registering a loss of 12 paise over its previous close. On Friday, the rupee depreciated by 10 paise to close at 81.74 against the US currency.