....for certain individuals.
The Internal Revenue Service (IRS) has announced that the 2018 annual limitation on health savings account (HSA) contributions by individuals with family coverage under a high deductible health plan (HDHP) is now $6,850. This limit was previously announced as $6,900, but has been revised downward due to an inflation adjustment provision in the Tax Cuts and Jobs Act. The 2018 annual limitation on HSA contributions by an individual with self-only coverage under a HDHP remains unchanged at $3,450.
The above change applies to the 2018 calendar year. Employees contributing to an HSA should be informed of the reduced maximum limit, and adjustments in contributions for the remainder of 2018 may be needed. Employees who have already contributed the maximum amount for 2018 will need to receive a refund of the excess contribution.
See page 400 of IRS Bulletin 2018-10