Estimated Tax Calculator (2025)

Estimate quarterly payments, safe harbor rules (100%/110% of prior year), and avoid underpayment penalties.

Safe Harbor Rules

Generally, pay at least 100% of prior year tax (110% for higher incomes) or 90% of current year to avoid penalties. Confirm thresholds for 2025.

This calculator will accept income estimates and withholding to produce quarterly amounts. Interactive calculator UI will be added later in the build.