The target for 2016-17, as per the earlier roadmap, was 3.5 per cent and is likely to be pushed back.
According to the global financial services major, the fiscal slippage in the next financial year would be largely due to the need to accommodate higher spending commitments, especially a bigger public sector wage/pension bill and rising banks' recapitalisation needs.
"On the fiscal math, signs are that the FY15/16 fiscal deficit target will not be breached," DBS said in a research note, adding that the "pace of fiscal tightening is likely to slow in FY16/17, with the deficit target to be adjusted higher at 3.7 per cent of GDP".
The report further noted that the budget session of the Parliament, which commenced today, would be crucial for investor sentiment.
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"Any signs of a washout session will prove detrimental, in midst of foreign portfolio outflows which are down cumulative USD 2 billion so far this year, a fifth last year's total flows," the report noted.
Passage of key bills, including the crucial Goods and Services Tax, bankruptcy code and the real estate bill are likely to be back in focus.
Markets meanwhile, would keep a close eye on the progress of the reform agenda, also before five key state elections due around April-May, it added.