ClearYear/Calculators

Tax timing

Estimated Tax Safe Harbor Calculator

Check the federal estimated-tax safe-harbor target using current-year and prior-year rules.

Use this for

  • stock sales
  • freelance income
  • RSU tax gaps
90% current-year rule$55,800
110% prior-year rule$45,100
Safe-harbor target$45,100
Still uncovered$27,100

Uses the common federal safe-harbor framework. State rules can differ.

Quick facts

Keep the estimate grounded.

Federal safe harbor compares 90% current-year tax with 100% or 110% of prior-year tax.

High-income prior-year AGI can trigger the 110% rule.

States may have separate rules.

Next tools

Useful follow-ups

Tax timingQuarterly splitTax timingExtension paymentSelf-employedFreelance quarterly tax