Tax year 2025
Federal Refund or Amount-Owed Estimator
Estimate federal income tax for a common individual situation and compare it with withholding and estimated payments.
Estimate your resultInteractive tax tools
Get a useful estimate without giving up personal information.
These focused federal tools calculate locally in your browser. Blue Circle does not ask for your name, SSN, address, or banking information.
Choose a calculator
Focused tools with clear boundaries.
Each result shows its assumptions, supported situations, and official IRS sources.
Tax years 2019–2025
Federal Individual Penalty & Interest Calculator
Estimate ordinary late-filing, late-payment, and tax interest for a federal Form 1040 balance.
Estimate late costsEducational estimates—not filing results.
Actual tax, penalties, interest, credits, and relief depend on facts and IRS records not captured by a simplified public tool.