Calculating Penalty for Partial Year Health Insurance on 2018 Taxes

When you had health insurance coverage for only part of 2018, you may owe a penalty on your federal income tax return. This calculator helps you determine the penalty amount based on your specific coverage period and income.

Understanding the Penalty

The Affordable Care Act (ACA) requires most individuals to maintain minimum essential health insurance coverage or pay a penalty. For 2018, the penalty was $695 per adult and $347.50 per child under the age of 18.

If you had coverage for only part of the year, you may owe a prorated penalty based on the number of months you were without coverage. The penalty is calculated as a percentage of the annual penalty amount.

The penalty applies to individuals who are not exempt from the ACA requirements, including those who qualify for an exemption based on income, hardship, or other circumstances.

Calculation Method

The penalty for partial year coverage is calculated using the following formula:

Penalty Amount = (Annual Penalty × Number of Months Without Coverage) ÷ 12

Where:

Annual Penalty - The full penalty amount for the year ($695 per adult, $347.50 per child)
Number of Months Without Coverage - The count of months you were without qualifying health insurance

The result is then added to your taxable income for the year, increasing your tax liability.

Example Calculation

Suppose you were without health insurance coverage for 4 months in 2018. Here's how the calculation would work:

Coverage Status	Months Without Coverage	Annual Penalty	Calculated Penalty
Adult without coverage	4	$695	$231.67
Child without coverage	4	$347.50	$115.83

In this example, an adult would owe $231.67 in penalties, and a child would owe $115.83.

Factors Affecting the Penalty

Several factors can influence the penalty amount:

Coverage Period - The longer you go without coverage, the higher the penalty.
Family Size - Penalties are calculated separately for each adult and child.
Income Level - If your income is below the tax filing threshold, you may not owe the penalty.
Exemptions - Certain individuals may qualify for exemptions that reduce or eliminate the penalty.

If you qualify for an exemption, you should document your exemption reason when filing your tax return to avoid paying the penalty.

Tax Impact

The penalty amount is added to your taxable income, which may increase your tax liability. The additional tax owed is calculated based on your tax bracket for the year.

For example, if you're in the 22% tax bracket and owe $231.67 in penalties, you would owe an additional $51.17 in taxes.

Additional Tax = Penalty Amount × Tax Rate

Frequently Asked Questions

Who is required to pay the partial year penalty?: Individuals who are not exempt from the ACA requirements and had no qualifying health insurance coverage for part of 2018.
How do I know if I qualify for an exemption?: You may qualify for an exemption if you have a financial hardship, religious objections, or other qualifying circumstances. Consult IRS Publication 505 for details.
Can I pay the penalty in installments?: No, the penalty must be paid in full when you file your tax return for the year.
What if I had coverage but it wasn't considered minimum essential coverage?: If your coverage didn't meet the minimum essential coverage requirements, you may still owe the penalty.
How do I report the penalty on my tax return?: You'll need to complete Form 8965 and attach it to your tax return. The penalty amount will be added to your taxable income.