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When does the HSA last month rule count as income?

Published January 18, 2024

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Short answer: The HSA last month rule counts as income when you use it to make a full-year contribution but do not maintain HSA eligibility for the following year.

How the HSA last month rule works

When it comes to Health Savings Accounts (HSAs), many people are curious about the last month rule and how it affects their taxes. The last month rule allows individuals to make a full year's contribution to their HSA even if they were not eligible for the entire year. This can be a great benefit for those who become eligible for an HSA mid-year.

The last month rule for Health Savings Accounts (HSAs) offers a unique opportunity for individuals who become eligible part-way through the year. It allows individuals to maximize their contributions, but it’s crucial to understand its implications for your taxes.

When last month rule becomes taxable income

However, there is a catch with the last month rule. If you contribute the full amount for the year but do not maintain HSA eligibility for the following year, you may have to include the contribution as income on your tax return.

So, when does the HSA last month rule count as income? The rule applies when:

  • You use the last month rule to make a full contribution for the year.
  • You do not maintain HSA eligibility for the following year.

Why tax planning matters for last month rule

It's important to be aware of how the last month rule can impact your taxes and to plan accordingly to avoid any surprises.

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