Is HSA Prorated for Months in HDHP?

If you are considering opening a Health Savings Account (HSA) as part of your High Deductible Health Plan (HDHP), you might be wondering if the contributions to your HSA are prorated for the months you are covered under the HDHP. The answer is yes, HSA contributions can indeed be prorated based on the number of months you are enrolled in an HDHP.

Here's a breakdown of how HSA proration works for months in an HDHP:

  • When you enroll in an HDHP mid-year, your maximum HSA contribution limit is adjusted based on the number of months you are covered by the plan.
  • Contributions are calculated on a monthly basis, allowing you to contribute a portion of the annual limit for each month you are covered by the HDHP.
  • If you switch health plans during the year, the proration rules apply to both the old and new HDHP plans.
  • Employer contributions are also subject to proration based on your coverage duration under the HDHP.

It's essential to understand the proration rules for HSA contributions when you have an HDHP to maximize the benefits and avoid any penalties for overcontributions. By managing your contributions effectively, you can make the most of your HSA as a tax-advantaged way to save for medical expenses.


If you're thinking about getting a Health Savings Account (HSA) alongside your High Deductible Health Plan (HDHP), it’s important to know that your contributions are prorated depending on how many months you're enrolled in the HDHP. This means you won't be penalized for contributing for the months you weren't covered!

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