Calculate quarterly estimated tax payments to avoid underpayment penalty. Safe harbors: 100% of prior year tax (110% if AGI > $150,000) or 90% of current year tax. Q1-Q4 due dates.
Enter the values for the scenario you are assessing. Calculate quarterly estimated tax payments to avoid underpayment penalty. Safe harbors: 100% of prior year tax (110% if AGI > $150,000) or 90% of current year tax. Q1-Q4 due dates. Use the estimated tax payments result to inform your calculation.