Question: I know the 2013 Federal Poverty Level rates were used to determine the premium tax credit subsidy. However, when it comes to reconciliation at tax time will the 2013 or 2014 Federal Poverty Level rates apply? This could make a big difference if a single persons MAGI is $46,500 for the 2014 tax year. Which one? 400% of the FPL for 2013 is $45,960 (No subsidy) or 400% of the FPL for 2014 is $46,680 (Subsidy).
Answer: The IRS will use the 2013 FPL standard to reconcile 2014 MAGI and advance premium tax credits (subsidies). See Fred's comment below for more detail.