Your income for purposes of increased Medicare premiums is recalculated each year. For example: 2017 premiums are based upon 2015 income; 2018 premiums are based upon 2016 income.
<a rel="nofollow" target="_blank" href="
https://www.ssa.gov/pubs/EN-05-10536.pdf">https://www.ssa.gov/pubs/EN-05-10536.pdf</a>
