How much tax do you owe on a 1099-C?
Work out the federal income tax a Form 1099-C actually costs you for the 2026 tax year. Enter the amount in box 2, the rest of your income, and what you owned and owed immediately before the debt was cancelled, and the calculator stacks the forgiven amount on top of your other income, applies the insolvency exclusion, and returns the tax the cancellation adds to your bill.
Typical range $1,935 – $2,150
- Federal income tax on the cancelled debt$2,150
- State income tax on the cancelled debt$0
- Total$2,150
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Between about $1,000 and $5,000 the forgiven amount is doing real work on your bracket. Set the money aside now rather than in April, and check whether an exclusion you have not claimed applies.
What this assumes, and where it could be wrong
Every one of these is a place the number could be off. They are here because you should be able to check our working, not because we are hedging.
THE FORGIVEN AMOUNT IS TAXED ON TOP OF YOUR OTHER INCOME, WHICH IS WHY A FLAT RATE MISSES.
The insolvency exclusion is measured immediately before the debt was cancelled, not today and not at the end of the year.
The brackets and the standard deduction are the IRS's own 2026 figures, from Rev. Proc. 2025-32 sections 4.01 and 4.14. Every other number in the arithmetic comes from you: your other income, your assets, your liabilities and your state rate are all figures you supply, and the calculator works them as you enter them rather than against a survey average.
This is income tax. Cancelled consumer debt is not self-employment income, so the 15.3 percent self-employment tax does not apply to it. If the cancelled debt was a business debt, the position differs and it is worth taking to an accountant rather than to a calculator.
The result assumes you take the standard deduction and claim no credits, and it leaves out several exclusions that apply to particular situations.
State tax is whatever rate you type in, applied to the same taxable part. States diverge here: some follow the federal insolvency exclusion, others compute cancelled debt income their own way, and a few tax no income at all. We would rather leave that as a box you fill in than publish a table we cannot stand behind.
