The spot rupee, which touched a low of 153.83 per dollar in intraday trading, closed at 153.75/85 per dollar, compared with Tuesday's close of 153.63/65.

"There were concerns on some budget policies and some were awaiting clarity," a currency dealer said requesting anonymity.

"The rupee will further depreciate because we see demand for imports of fuel, steel and also general imports. People could import more lower-end vehicles on which the government reduced taxes. We do not see a proper plan for shorter term dollar inflows."

The government imposed new taxes on high-end motor vehicles, telecoms, banks and liquor in a bid to boost revenues, in its 2018 budget outlined last week, as the budget deficit for the current year slipped to 5.2 percent of GDP.

Finance Minister Mangala Samaraweera announced on Wednesday tax concessions worth a monthly 1.5 billion rupees.

The rupee has slipped 2.8 percent so far this year.

Foreign investors had invested a net 19.4 billion rupees ($126.18 million) in equities this year as of Wednesday's close, and 44.3 billion rupees in government securities as of Nov. 8, official data showed.