IRS Tax Calculators

Free tools to estimate what you owe and explore your options. 

These free IRS tax calculators give you a fast, plain-English read on your federal tax situation. Use them to estimate how much you owe, understand your resolution options, and see what a solution might cost, all before you call the IRS or agree to anything. Every result is an estimate to help you understand your options, not tax advice or a decision from the IRS.

Our Free IRS Tax Calculators

IRS Penalty & Interest Estimator

See how the IRS failure-to-file penalty, failure-to-pay penalty, and daily-compounding interest have added to your balance, and what it could cost to keep waiting. Enter your unpaid tax and the year it applied to, and the tool breaks your estimated balance into original tax, penalties, and interest, then projects where you could stand in 6 and 12 months.

Use it if: you owe federal back taxes and want to know how much of your balance is penalties and interest, and how fast it is growing.

Try the IRS Penalty & Interest Estimator

IRS Payment Plan Calculator

Almost everyone with an IRS balance qualifies for some kind of payment plan. This tool shows which plan likely fits your balance and estimates the monthly payment. Enter what you owe and, if you like, what you can comfortably pay each month, and it will flag when a standard plan may not be realistic and other options (such as a partial-payment plan or an Offer in Compromise) are worth exploring.

Use it if: you owe the IRS and want to know your installment options and a realistic monthly payment.

Try the IRS Payment Plan Calculator 

IRS Offer in Compromise Qualifier

An Offer in Compromise lets some taxpayers settle their tax debt for less than the full amount, but only if they qualify. This four-step tool uses the same basic eligibility rules and reasonable collection potential formula the IRS applies, so you can see whether you are able to apply right now and whether settling for less is realistic in your situation.

Use it if: you cannot pay your full IRS balance and want an honest read on whether an Offer in Compromise is worth pursuing.

Try the IRS Offer in Compromise Qualifier 

Are These Estimates Accurate?

Each calculator uses current IRS rules and the quarterly interest rate set under IRC Section 6621, which changes every quarter. The results are good-faith estimates meant to help you understand your situation. They are not a bill, a payoff figure, an approval, or legal advice, and the IRS makes all final determinations. You can confirm current federal rates and program rules at IRS.gov.

Have Your Results? Here Is How Damiens Law Helps

Damiens Law is an attorney-led tax resolution firm serving Mississippi, Tennessee, and clients nationwide on IRS matters. Once you have an estimate, we can review your full situation, confirm which resolution actually fits, handle the filings and communication with the IRS, and, if a standard payment plan is not realistic, pursue penalty abatement, a partial-payment plan, an Offer in Compromise, or currently not collectible status depending on your circumstances. Consultations are free and confidential.

Talk to Damiens Law

You do not have to face the IRS alone. If a calculator showed a balance or a monthly payment that feels out of reach, that is exactly what we help with every day. Every consultation is free and confidential, with no pressure to move forward.

Schedule your free consultation or call 601-957-9672 for your free, no-obligation consultation with Damiens Law.

Prefer to read up first? Download our free guide, How to Survive the IRS.