Safe Harbor Information

My client's income is unpredictable. How can I calculate Safe Harbor?

  • Safe Harbor tax laws help taxpayers avoid underpayment penalties if they owe less than $1,000, or by paying a certain amount based on the current or prior year's taxes due. 

  • If the client's income is unpredictable, you can either pay 90% of what you think their tax in the current tax year is going to be or pay 100% (or 110% if AGI is over a certain amount) of the prior year's taxes due.
  • On the Tax Report, the safe harbor number shown in the Key Figures section of the tax report represents the 100% (or 110%) variation of that calculation. The question mark next to the number shown circled below provides more detail (seen in the second screenshot below) on where that number comes from.


Screenshot 2025-01-03


  • In Scenario Analysis, the safe harbor line represents the 90% variation of that safe harbor calculation. Since scenarios are independent of each other and referring back to the prior year is not possible, 90% of the projected taxes due for that current tax year is used.