2026 IDES Rules · Updated October 2026
Illinois Unemployment Benefits Calculator
Enter your two highest quarters and see what IDES would likely pay each week — 47 percent of the average, with every dependent allowance and ceiling priced in.
The Illinois Department of Employment Security runs the program: claims for up to 26 weeks, certified every two weeks, under the rules explained below.
Illinois range card
2026Weekly ceiling
$628 base · $748 spouse · $859 children
$628
Benefit formula
47% of the two-highest-quarter average
47%
Claim length
26 weeks; the account is 26× the rate
26 wks
Start here
Illinois Unemployment Calculator
Three inputs drive the estimate: your two highest base-period quarters, and your household tier. The estimate applies the 47 percent formula, rounds up, and caps at the ceiling for the tier you pick — the same arithmetic IDES runs.
Run your numbers
47% of your two best quarters averaged over 26 — rounded up, banded $51 to $628 base.
Paid the same all year? Each quarter is roughly your weekly wage × 13.
Enter your two highest quarters to see the 47% reading, the tier ceilings, and the 26-week account — instantly, with nothing stored.
The official formula
47% × (two highest quarters ÷ 26), rounded up — IDES’ published math.
All three ceilings
Base, spouse, and children tiers capped at $628, $748, and $859.
Planning aid only
IDES issues the official amount after your claim is processed.
Know before you file
Illinois Unemployment Quick Facts
These are the numbers Illinois claimants ask about most. Each one comes from IDES publications, current for the 2026 benefit year.
$628 / wk
Base ceiling
The 2026 maximum with no dependents; $51 anchors the floor.
$859 / wk
Children ceiling
The top tier when dependent children meet the support tests.
47%
The benefit formula
Of the two highest quarters averaged over 26 weeks, rounded up.
26 weeks
Claim duration
Inside a one-year benefit period; the account is 26× the rate.
50%
Partial shield
Wages under half the weekly rate leave the check untouched.
30 days
Appeal window
In writing, from the mail date — then 30 more to the Board.
The 2026 picture
Illinois Unemployment at a Glance
Illinois averages before it multiplies: instead of reading one quarter, IDES takes your two highest, prices the average weekly wage, and pays 47 percent of it. The design rewards consistent earners and softens one bad quarter — but it also means a weak second-best quarter drags the rate down, because the formula never looks at the other two quarters at all.
$628
Base ceiling
$859
Children ceiling
47%
Replacement share
26
Weeks paid
The three ceilings
The 2026 Benefit Table: Three Tiers, One Formula
Illinois is one of the few states that publishes separate ceilings for household tiers, and the differences are large enough to plan around. The allowances ride on top of the 47 percent reading before each ceiling applies — so a high earner with children sees no change, while a mid-range earner with a non-working spouse gains real dollars every week.
| Household tier | Weekly ceiling | Over 26 weeks | How the tier works |
|---|---|---|---|
| No dependents | $628 | $16,328 | The base 47% reading, clamped to the $51 floor. |
| Non-working spouse | $748 | $19,448 | One dependent allowance added; the spouse ceiling binds. |
| Dependent children | $859 | $22,334 | Per-child allowances added; the children ceiling binds. |
Survey note — The legal anchor
The 47 percent formula, the $51 floor, and the three ceilings come from the IDES Weekly Benefit Amounts table and the Unemployment Insurance Act. Nothing on this page changes them — the numbers only help you survey your own claim before IDES does.
The plain answer
How Much Unemployment Will I Get in Illinois?
Add your two highest base-period quarters together, divide by 26, and take 47 percent of the result — rounded up. A claimant earning a steady $300 a week reads about $141; at $700 a week the reading is about $329; at $1,300 a week it runs into the$628 ceiling near $611.
Household matters as much as wages here. The same claim that prices $628 with no dependents prices up to $748 with a non-working spouse and $859 with children. Dependents add the greater of $15 or 9 percent of your average weekly wage each, before the tier ceiling binds.
What you would get
Illinois Weekly Benefit Amounts by Wage
The ladder below converts steady weekly pay into the reading IDES actually makes — 13 weeks of earnings per quarter, two quarters averaged, 47 percent taken. Wages of about $1,336a week and above all land on the $628 base ceiling.
| Steady weekly wage | Two-highest average (×13 wks) | Estimated weekly benefit | Where it lands |
|---|---|---|---|
| $300 | $3,900 / $3,900 | $141 | Within band |
| $500 | $6,500 / $6,500 | $235 | Within band |
| $700 | $9,100 / $9,100 | $329 | Within band |
| $900 | $11,700 / $11,700 | $423 | Within band |
| $1,100 | $14,300 / $14,300 | $517 | Within band |
| $1,300 | $16,900 / $16,900 | $611 | Within band |
Estimates apply the 47% reading to two identical quarters. Uneven quarters average differently — enter your real pair in the calculator above.
Survey note — Dependent dollars, concretely
On Daniela’s worked claim below, the $552 base rate picks up two children at$105.58 each — the 9-percent share of her average weekly wage — lifting the check to$763, comfortably inside the $859 children ceiling.
Real numbers
Worked Example: Daniela in Cicero
Daniela coordinated outbound freight at a Cicero warehouse until the position was eliminated in May. Her best base-period quarter paid $16,400 and her second-highest $14,100. Here is the whole claim, surveyed the way IDES surveys it.
Step 1 — the average
$16,400 + $14,100 = $30,500 ÷ 26 weeks = $1,173.08 average weekly wage.
Step 2 — the 47% reading
47% of $1,173.08 = $551.35, rounded up to a $552 weekly check.
Step 3 — the dependents
Two children add $105.58 each (the 9% share, above the $15 minimum) — the rate lifts to $763, under the $859 ceiling.
Step 4 — the account
$552 base × 26 = $14,352 total, waiting week unpaid at the front.
Then Daniela Picks Up Weekend Work
Daniela finds weekend shifts paying $350 a week. The 50-percent shield protects the first $276 — so $350 minus the shield leaves a $478 check. Combined she keeps $828, better than the benefit alone, and every certified week still draws down the same account at the slower rate.
The window IDES reads
Your Base Period: Where the Two Quarters Come From
The standard base period is the first four of the last five completed calendar quarters when you file — the newest finished quarter sits out while employer wage reports settle, and the current unfinished quarter does not exist for claim purposes. IDES reads the two highest quarters inside that window, which is why a strong quarter that lands just after the window closes cannot help the rate.
| If you file in | Your standard base period covers |
|---|---|
| January through March 2026 | October 2024 through September 2025 |
| April through June 2026 | January 2025 through December 2025 |
| July through September 2026 | April 2025 through March 2026 |
| October through December 2026 | July 2025 through June 2026 |
Wages from other states, federal service, and the military fold into the Illinois record when they fall in the window — often the difference between a second-highest quarter that helps and one that barely moves the average. Missing employers are the most common reason a determination comes back lower than your own math.
Survey note — Gather before you file
Pull pay stubs or W-2s for the base-period quarters before you start. The monetary determination lists the quarters IDES used — check it against your records the day it arrives, because fixing an error early beats appealing one later.
The unpaid opener
The Waiting Week: Illinois’ Qualifying Period
The first week of the benefit period is a statutory qualifying week — you file it, certify it, and meet every rule, but no payment covers it. IDES has paid waiting weeks exactly once, under a pandemic waiver that ended years ago; every claim since runs the full unpaid week at the front.
On Daniela’s $552 rate the quiet week defers $552 of a $14,352account. A claim that ends at rehire before week 26 never recovers those wages. Keep one week of expenses banked between filing and the first deposit, and certify the waiting week exactly as you would a paid one — skipping it can push the entire schedule back.
Survey note — Certify from day one
Illinois certifies every two weeks, which makes the opening window unusually easy to miss. Mark the certification calendar when you file, and treat the waiting week as the first entry on it.
Working while claiming
Part-Time Work and the 50-Percent Shield
Half the weekly benefit amount is free. Wages at or under 50 percent of the WBA leave the full check untouched, and every dollar above that line deducts one-for-one. A week whose earnings reach the full weekly rate pays nothing, though it still counts in the record when you certify it.
| Weekly earnings | Benefit paid on a $552 reading | Combined take |
|---|---|---|
| $0 | $552 | $552 |
| $200 | $552 | $752 |
| $276 | $552 | $828 |
| $350 | $478 | $828 |
| $450 | $378 | $828 |
| $552 | $0 | $552 |
Read the third row twice: on a $552 reading, wages of exactly $276 — half the rate — leave the check whole. That is the shield’s edge, and it moves with your own weekly amount. Report gross wages when earned; the two-week certification asks for the whole stretch, and mismatches against employer reports surface as overpayment letters months later.
Survey note — The two-week rhythm
Illinois certifies every two weeks through the IDES portal or Tele-Serve, each certification covering both weeks. Work, wages, and work search are attested for each week separately inside the pair — and a missed window leaves weeks unclaimed until you call.
Reason and conduct
Why Illinois Claims Get Approved or Denied
A priced claim is not yet a paid claim. Separately, IDES examines why you left the job and how you conduct yourself during the benefit period. The separation reason decides whether you qualify at all; able, available, and actively seeking decides whether each certification ships the money.
Separations that usually qualify
Layoffs, position eliminations, and hour cuts you did not cause top the list. Being fired for honest inability to meet production standards generally stays eligible too — Illinois reserves disqualification for misconduct connected to the work, not for weak output or a bad fit.
Separations that trigger scrutiny
Quitting without good cause attributable to the employer, and discharge for willful misconduct, both carry disqualification. Good-cause quits — documented medical necessity, unsafe conditions, following the employer’s own process — can still qualify, but the evidence is yours to supply and the employer’s account arrives alongside it.
Illinois’ claim economy runs on logistics, manufacturing cycles, healthcare, and the warehouse corridor around Chicago, so temporary layoffs and recall promises are common. If your employer sets a return date inside the benefit period, the claim can bridge the weeks — certify as directed and answer every availability question truthfully while you wait.
Two ways in
How to File Your Illinois Claim
Claims open online through IDES’s application, which routes into IBIS — the state’s benefits platform — or by phone at (800) 244-5631. List every employer from the last 18 months, pick your federal withholding election at filing, and choose direct deposit for the fastest payments.
Gather the work history
Every employer from the last 18 months, with dates, wages, and the reason each job ended. Missing employers drag the two-quarter average down.
File the initial claim
Apply online or by phone. Elect 10% federal withholding here — Illinois offers no state withholding — and set direct deposit.
Read the determination
The monetary determination lists the quarters used, your weekly rate, and the account total. Errors caught the day it arrives are corrections, not appeals.
Certify every two weeks
The certification covers two weeks at a time through the portal or Tele-Serve — work, wages, and search for each. Miss a window and those weeks wait until you call.
What happens next
After You File: Determinations and Payment Flow
The monetary determination arrives after processing and carries the numbers worth checking the day it lands: the two quarters used, the average weekly wage behind your rate, the weekly amount, and the 26-week account. Every employer from the window should appear, and the 47 percent math should match your own — errors caught early are corrections.
Payments follow the two-week certifications, direct deposit fastest. The waiting week sits unpaid at the front, and partial weeks draw the same account more slowly. Keep certifying through any investigation or appeal — only weeks you claimed can ever be paid, and a reversal pays those weeks retroactively.
Survey note — The sequence that matters
File the claim → the waiting week certifies unpaid → two-week certifications begin → payments follow processing. Each step feeds the next, and a skipped certification window stalls the whole chain until you call to reopen the weeks.
The routine that keeps money flowing
Work Search: Able, Available, and Actively Seeking
Illinois does not set a fixed weekly contact count the way its neighbors do — the requirement is the posture: able to work, available for work, and actively seeking it, with a record of the search kept on IDES’s published form. Employer, date, contact method, and result belong in the log as each contact happens, because IDES can demand it at any point in the claim.
01
Keep the form
IDES publishes a work-search record — employer, date, method, result — for exactly this purpose.
02
Log as you go
Entries recorded as each contact happens, not reconstructed at certification time.
03
Certify truthfully
Each two-week certification attests to the search for both weeks inside it.
A week that fails the search audit is a week of the account that never returns. The patrol runs through the waiting week and through part-time weeks alike, and the audit compares your log to employer hiring records — reconstructed efforts show exactly like they sound.
Plan for April
Taxes on Illinois Unemployment Benefits
The IRS counts unemployment benefits as ordinary income, and Illinois includes them on the state return at its flat income-tax rate. One withholding election exists: 10 percent federal, taken from each weekly payment if you choose it at filing. Illinois offers no state withholding — the state share always comes from your own set-aside.
On Daniela’s $552 rate, the federal election moves $55a week — $1,435 over a full 26-week run, usually less than the April bill on the same money. The 1099-G posts each January for the prior year’s payments, and both returns need it.
Survey note — The safe default
Claimants planning a full-length claim usually take the federal election and bank the state share themselves. Claimants bridging to a signed offer sometimes skip both — the math only works if the rehire truly lands before the withholding would have mattered.
Denied? Read this today
Denied? The Two Thirty-Day Clocks
Thirty days after a denial letter is mailed, a written appeal starts the case to a referee, whose hearing is the first live review — testimony, documents, and a decision in writing. The clock runs from the mail date, not the day you opened the envelope.
Thirty days after the referee’s decision, a written appeal moves the case to the IDES Board of Review, which mostly reviews the record rather than hearing witnesses again. Courts sit above the Board for the rare case that keeps going. Certify throughout — a reversal pays the weeks you claimed, and only those.
Rung 1
Referee hearing
Filed in writing within 30 days of the mailed determination; the first live review.
Rung 2
Board of Review
Within 30 days of the referee’s decision; mostly a records review.
Rung 3
The courts
Administrative review above the Board for the rare case that continues.
Save yourself the letters
Seven Mistakes That Stall Illinois Claims
Missing an employer from the 18-month list
Undisclosed employers surface in wage-report matching weeks later, freezing the claim while the record is corrected — and a missing quarter drags the two-quarter average down.
Missing the two-week certification window
Illinois certifies in pairs. A missed window leaves both weeks unclaimed until you call, and reopened weeks pay on the slowest schedule in the system.
Skipping the waiting-week certification
The unpaid week only counts if you certify it. Miss it and the payment schedule slides back for no benefit at all.
Reporting net pay instead of gross
Certifications ask for gross wages when earned. Net figures understate wages, and the mismatch surfaces as an overpayment letter months later.
Ignoring the monetary determination
The determination lists the quarters, the average, and the rate. Errors read the day it arrives are corrections; errors found later are appeals on a 30-day clock.
Keeping no work-search record
IDES can demand the log at any point. A search reconstructed from memory after an audit notice convinces no one.
Waiting out the appeal clocks
Both thirty-day windows run from their mailing dates. File the appeal first and assemble the argument second — a lapsed clock cannot be rewound.
Illinois Unemployment Office Contact
IDES runs the program statewide, with offices across the Chicago metro and downstate. Phone lines run busiest Monday mornings; midweek afternoons move faster. Keep your claim number and monetary determination in hand — most calls turn on the quarters the determination lists.
Straight answers
Illinois Unemployment FAQ
How much unemployment will I get in Illinois?
IDES adds your two highest base-period quarters, divides by 26 for the average weekly wage, and pays 47 percent of it — rounded up to the next whole dollar. A $16,400 quarter beside a $14,100 one averages $1,173.08, and 47 percent prices out to a $552 weekly check after the round-up. The 2026 band runs from a $51 floor to a $628 ceiling with no dependents.
What are the maximum unemployment benefits in Illinois for 2026?
Three published ceilings: $628 a week with no dependents, $748 with a non-working spouse, and $859 with dependent children. The $51 floor anchors the bottom of the table. Every ceiling re-prices with the statewide average wage, and each allowance rides on top of the 47 percent base before its own ceiling applies.
How does the Illinois dependent allowance work?
Each dependent adds the greater of $15 or 9 percent of your average weekly wage. A non-working spouse counts as one dependent and lifts the ceiling to $748; children count while they meet the age and support tests and lift it to $859. On a worked claim below, two children add $105.57 each, raising a $552 base rate to $763.
Does Illinois have a waiting week?
Yes — IDES calls it a qualifying period required by law, usually the first week you file. Benefits are not paid for it, though certifying it anchors the claim. The pandemic waiver that briefly paid waiting weeks ended years ago, so budget for a zero in week one.
How long can I collect unemployment in Illinois?
Up to 26 full weeks inside the one-year benefit period, the standard maximum. The account equals 26 times your weekly rate — $14,352 at a $552 rate — and weeks claimed at partial rates draw from the same account while stretching its calendar life.
What does the Illinois partial-benefit rule allow?
Half the weekly benefit amount is free: wages at or under 50 percent of the WBA leave the full check untouched, and every dollar above that line deducts one-for-one. On a $552 rate the free zone is $276 — earn $350 and the check drops to $478. Report gross wages when earned; the certification asks for the whole two-week stretch.
How does Illinois certification work?
Certifications run every two weeks through the IDES portal or Tele-Serve, and each one covers both weeks — work, wages, and work search for each. Missing a certification window leaves those weeks unclaimed until you call to reopen them, and unclaimed weeks are the slowest fix in the system.
How do appeals run in Illinois?
Thirty days after a denial letter is mailed, a written appeal starts the case to a referee, whose hearing is the first live review. Thirty days after the referee’s decision, a written appeal moves the case to the IDES Board of Review, which mostly reviews the record. Courts sit above the Board for the rare case that keeps going. Certify throughout.
Does Illinois tax unemployment benefits?
Yes — the IRS taxes benefits federally, and Illinois includes them on the state return at its flat income-tax rate. Federal withholding is available by election on the claim; Illinois offers no state withholding, so the state share comes from your own set-aside. The 1099-G posts each January for the prior year’s payments.
How do I file for unemployment in Illinois?
Claims open online through IDES’s application — the system routes into IBIS, the state’s benefits platform — or by phone at (800) 244-5631. List every employer from the last 18 months, file the waiting week as your first certification, and pick direct deposit for the fastest payments.
Where every number comes from
Sources and Verification
- IDES — main site — verified October 2026.
- IDES — claimant FAQs — verified October 2026.
- IDES — unemployment insurance — verified October 2026.
- IDES — find benefits and the WBA table — verified October 2026.
- IDES — file a claim — verified October 2026.
- IDES — certify — verified October 2026.
- IDES — appeals — verified October 2026.
- Illinois Department of Revenue — verified October 2026.
- IRS Topic 418 — unemployment compensation — verified October 2026.
- BLS — Illinois economy at a glance — verified October 2026.
- U.S. DOL — unemployment insurance — verified October 2026.
- CBPP — how many weeks of unemployment compensation are available — verified October 2026.
- CareerOneStop — job search and benefits tools — verified October 2026.
Compare the borders
Neighboring States
Illinois draws claimants from every border — the Chicagoland commute runs to Wisconsin and Indiana, the Quad Cities to Iowa, St. Louis straddles Missouri, and the Ohio River line touches Kentucky. If you worked in more than one, the combined-wage process can fold those earnings into the claim where the work happened.
Wasim Akram
Wasim Akram is a digital publisher and researcher focused on U.S. unemployment benefits. He researches eligibility rules, benefit calculations, state-specific requirements, and application processes to provide clear, practical information that helps workers better understand their unemployment benefits.