Some consumers are willing to pay the penalty for not having health insurance because it is cheaper than getting coverage, according to a new analysis.

The analysis from research firm Avalere Health details one reason why the administration has done so poorly in a special enrollment period for Obamacare. So far only 68,000 people have signed up for the period that ends April 30.

This is the period set aside for people who are getting hit by the law’s new tax on Americans who do not have health insurance packages. Affected taxpayers must still pay the 2014 penalty but could avoid the higher 2015 penalty by getting coverage by the deadline.

But it turns out many uninsured workers would rather pay the tax, because it will cost less than buying insurance.