If you own a business and don’t have a tax-advantaged retirement plan, it’s not too late to establish one and reduce your 2018 tax bill. A Simplified Employee Pension (SEP) can still be set up for 2018, and you can make contributions to it that you can deduct on your 2018 income tax return.
A SEP can be set up as late as the due date (including extensions) of your income tax return for the tax year for which the SEP is to first apply. That means you can establish a SEP for 2018 in 2019 as long as you do it before your 2018 return filing deadline. You have until the same deadline to make 2018 contributions and still claim a potentially substantial deduction on your 2018 return.
Generally, other types of retirement plans would have to have been established by December 31, 2018, in order for 2018 contributions to be made (though many of these plans do allow 2018 contributions to be made in 2019).
With a SEP, you can decide how much to contribute each year. You aren’t obligated to make any certain minimum contributions annually.
But, if your business has employees other than you:
The contributions go into SEP-IRAs established for each eligible employee.
For 2018, the maximum contribution that can be made to a SEP-IRA is 25% of compensation (or 20% of self-employed income net of the self-employment tax deduction), subject to a contribution cap of $55,000. (The 2019 cap is $56,000.)
Like any good tax planning strategy there are rules and limits that apply to SEPs beyond what we’ve discussed above.