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IRS Penalty Calculator

Estimate IRS penalties for late filing, late payment, or underpayment of estimated taxes based on the amount owed and how many days past the deadline you are. Helpful for taxpayers deciding whether to file for an extension or pay immediately.

Tax Amount Owed ($)

Days Late (days)

Penalty Type

Reasonable Cause Expected

Fill in the required fields to see your result.

Taxes

Tax Bracket Calculator

Find out exactly how much federal, state, and payroll tax you owe by entering your taxable income and filing status. Useful for understanding both your marginal rate and effective tax rate before or after filing.

Taxable Income ($)

Filing Status

State Income Tax Rate (%)

Include Payroll Taxes

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Key differences

	IRS Penalty Calculator	Tax Bracket Calculator
Category	Taxes	Taxes
Inputs required	4	4
Result	Total IRS Penalties ($)	Total Tax Liability ($)
What it does	Estimate IRS penalties for late filing, late payment, or underpayment of estimated taxes based on the amount owed and how many days past the deadline you are. Helpful for taxpayers deciding whether to file for an extension or pay immediately.	Find out exactly how much federal, state, and payroll tax you owe by entering your taxable income and filing status. Useful for understanding both your marginal rate and effective tax rate before or after filing.