If you're collecting unemployment benefits in Illinois and wondering whether those payments are taxable — or if you're an employer trying to understand your tax obligations — the answer involves several layers. "Unemployment tax" means different things depending on who's asking. Here's how each side of that equation works.
The phrase "unemployment tax calculator" usually refers to one of two things:
Both are real calculations. Both involve Illinois-specific rules. And both are worth understanding separately.
Yes. Unemployment benefits are taxable income at the federal level, regardless of which state you're in. The IRS treats unemployment compensation the same as wages for income tax purposes.
Illinois state income tax is a separate question. Illinois does not tax unemployment benefits at the state level. That means if you received unemployment payments from the Illinois Department of Employment Security (IDES), you owe federal income tax on that money — but not Illinois state income tax.
Each year, IDES issues a Form 1099-G showing the total amount of unemployment compensation you received. That figure gets reported on your federal return.
The amount you actually owe in federal income tax depends on:
There's no flat rate applied to unemployment income alone. It flows into your overall taxable income and gets taxed at your marginal rate like anything else.
Claimants receiving Illinois unemployment benefits can choose to have 10% federal income tax withheld from each payment. This is optional — you can elect it when filing your initial claim or update your preference during the benefit year. Withholding doesn't satisfy your full tax liability in all cases, but it reduces the chance of a large balance due at filing time.
If you didn't withhold and received substantial benefits, you may owe taxes when you file. If you're unsure how your specific benefit amount affects your tax situation, a tax preparer or the IRS's own withholding calculator can help with that math.
Illinois employers fund the unemployment insurance system through the State Unemployment Tax Act (SUTA), sometimes called FUTA's state counterpart — though FUTA (Federal Unemployment Tax Act) is a separate obligation employers also carry.
Every Illinois employer is assigned a SUTA tax rate that applies to a portion of each employee's wages. The key variables:
| Factor | What It Means |
|---|---|
| Taxable wage base | The portion of each employee's wages subject to SUTA tax; Illinois sets this annually |
| Experience rate | Employers with more layoffs (and thus more claims charged to their account) typically pay higher rates |
| New employer rate | Businesses without a sufficient claims history receive a standard rate until they establish one |
| Industry classification | Some industries carry higher baseline rates based on historical claim patterns |
Illinois IDES recalculates employer rates annually. The rate you pay in one year can change the next based on how many former employees filed successful claims against your account.
When a former employee collects unemployment benefits in Illinois, a portion of those payments is typically charged to the former employer's account. More charges over time generally push an employer's experience rate higher. This is how the system creates an incentive for employers to maintain stable workforces.
Employers who contest claims — and win — avoid those charges. Employers who lose contests, or who don't respond, typically absorb them.
Separately, employers pay FUTA to the federal government. Illinois employers who pay their state unemployment taxes on time qualify for a credit that substantially reduces the effective FUTA rate. The interaction between FUTA and SUTA affects total employer cost, and calculating it requires knowing the employer's current state rate and whether Illinois is carrying any federal loan balance that might reduce the credit.
There's no single Illinois unemployment tax calculator that applies to everyone — because the inputs vary so much:
📊 IDES publishes employer rate information and taxable wage base figures on its official website each year. Claimants can use IRS tools to estimate federal tax owed on their 1099-G.
Whether you're a claimant or an employer, no published rate or formula produces your actual tax figure without the specific inputs from your situation. For claimants, that means your full-year income picture — not just the unemployment portion. For employers, that means your specific account history, current rate notice from IDES, and total payroll.
The structure of how Illinois unemployment taxes work is consistent. The number that applies to you is not.