Can You Sign Up for HDHP for Only One Month to Contribute to HSA?

Health Savings Accounts (HSAs) are a great way to save for medical expenses while enjoying tax benefits. To contribute to an HSA, you must be enrolled in a High Deductible Health Plan (HDHP). But can you sign up for an HDHP for only one month just to make a contribution to your HSA? Let's dive into the details.

Typically, you need to have an HDHP for the entire year to be eligible to contribute to an HSA. However, there are certain scenarios where you can enroll in an HDHP for just one month and still make contributions to your HSA:

  • If you have a qualifying event such as a change in employment status or marital status that makes you eligible for an HSA.
  • If you are covered by an HDHP for part of the year, you can make a prorated contribution based on the number of months you were covered by the HDHP.

It's important to note that contributing to an HSA when you are not eligible can result in tax penalties. Make sure you understand the rules and consult with a tax advisor if you have any questions.


Health Savings Accounts (HSAs) serve as a smart financial tool to prepare for unexpected medical costs while providing you with tax advantages. To be eligible for making contributions to an HSA, enrollment in a High Deductible Health Plan (HDHP) is required. But what if you only want to enroll for a short period, say one month? Is that feasible? Let's peel back the layers.

Generally, individuals must maintain their HDHP coverage for the entire tax year to contribute to an HSA fully. But there are exceptions:

  • In some situations, such as life-altering events—like a job change or marriage—you may be eligible for an HSA even if your HDHP coverage is temporary.
  • If you were under an HDHP for a fraction of the year, you could still contribute to your HSA, although the amount will be prorated based on the number of months you had coverage.

Bear in mind that making contributions to your HSA without proper eligibility can lead to penalties when tax time rolls around. It's always a smart move to familiarize yourself with the regulations and discuss your situation with a tax professional.

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