Business owners: A Simplified Employee Pension (SEP) may give you one last 2017 tax and retirement saving opportunity. You can establish a SEP IRA for 2017 and make 2017 contributions as late as the 2018 due date (including extensions) of your income tax return. Contributions are discretionary and may be as large as $54,000 for 2017. Generally, other types of retirement plans must have been established by Dec. 31, 2017, for 2017 contributions to be made (though many also allow 2017 contributions in 2018). Additional rules and limits apply. Contact us for details.