Quarterly estimated tax calculator

What to send in each quarter.

Built and reviewed by Dovanic, Founder and editor, FreeByteLast reviewed: 2026-08-18

Expected yearly income

Expected effective rate

24%

Already paid

Per quarter

$4,200

Yearly liability

$28,800

With these inputs, per quarter comes to $4,200. Yearly liability works out to $28,800. The result assumes expected effective rate stays at 24%.

What moves the number · Per quarter

Input	−10%	Now	+10%
Expected yearly income	$3,480	$4,200	$4,920
Expected effective rate	$3,480	$4,200	$4,920
Already paid	$4,500	$4,200	$3,900

Whatmakesequal

Save this set of inputs, change something, then save again to compare the outcomes side by side.

What to send in each quarter.

With the defaults above, per quarter works out at $4,200.