Why your ACA plan from last year might not be the best one for you this year,

[BlindTiresias]

50. Regarding the fine

"The fee in 2015

If you don’t have coverage in 2015, you’ll pay the higher of these two amounts:

2% of your yearly household income. (Only the amount of income above the tax filing threshold, about $10,000 for an individual, is used to calculate the penalty.) The maximum penalty is the national average premium for a bronze plan.
$325 per person for the year ($162.50 per child under 18). The maximum penalty per family using this method is $975.

The fee for not having coverage in 2014

If you didn’t have coverage in 2014, you’ll pay one of these two amounts when you file your 2014 federal tax return:

1% of your yearly household income. (Only the amount of income above the tax filing threshold, about $10,000 for an individual, is used to calculate the penalty.) The maximum penalty is the national average premium for a bronze plan.

$95 per person for the year ($47.50 per child under 18). The maximum penalty per family using this method is $285.

The fee after 2015

The penalty increases every year. In 2016 it’s 2.5% of income or $695 per person. After that it's adjusted for inflation."