How to Report a Post Tax Contribution to HSA on the 2018 1040

When it comes to reporting post-tax contributions to your HSA on the 2018 1040 form, it's essential to follow the guidelines set by the IRS to ensure accuracy and compliance. Firstly, you must be eligible to contribute to an HSA and have made post-tax contributions during the tax year. These contributions are typically made directly to your HSA provider and are not subject to payroll deductions.

Reporting post-tax contributions on your 1040 form involves filling out Form 8889, which is specifically designed for HSA contributions and distributions. Here's a step-by-step guide to reporting your post-tax HSA contributions:

  1. Fill out Form 8889: Provide your personal information and details about your HSA contributions, including post-tax contributions.
  2. Calculate your deduction: Determine the amount of your HSA deduction based on your post-tax contributions and other qualified expenses.
  3. Transfer the deduction to your 1040: Once you have calculated your HSA deduction, transfer the total amount to the appropriate line on your 1040 form.

By following these steps and accurately reporting your post-tax HSA contributions on your 2018 1040 form, you can maximize your tax savings and ensure compliance with IRS regulations.


Reporting post-tax contributions to your HSA on your 2018 1040 form is an important step in ensuring you maximize your tax benefits. Begin by verifying your eligibility to contribute to an HSA, confirming that you have made these contributions directly to your HSA provider during the tax year.

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