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Estate tax estimate calculator

Rough liability on an estate.

Built and reviewed by Dovanic, Founder and editor, FreeByteLast reviewed: 2026-08-18
$
$
40%

Estimated tax

$180,000

Passed on

$1,270,000

With these inputs, estimated tax comes to $180,000. Passed on works out to $1,270,000. The result assumes tax rate stays at 40%.

Taxable portion
$450,000
Effective rate
12.4%

What moves the number · Estimated tax

Input−10%Now+10%
Estate value$122,000$180,000$238,000
Tax-free threshold$220,000$180,000$140,000
Tax rate$162,000$180,000$198,000

Solve for an input

Whatmakesequal

Compare scenarios

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

Rough liability on an estate.

A worked example

Starting figures

Estate value
$1,450,000
Tax-free threshold
$1,000,000
Tax rate
40%

What it returns

Estimated tax
$180,000
Passed on
$1,270,000
Taxable portion
$450,000
Effective rate
12.4%

How to read the results

With the defaults above, estimated tax works out at $180,000.

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