How to Fill Out Illinois Form PTAX-329 (w/Examples) + FAQs

Illinois Form PTAX-329 is the Certificate of Status for the Senior Citizens Assessment Freeze Homestead Exemption (SCAFHE), the annual renewal application that every qualifying senior homeowner must file with their county Chief County Assessment Officer (CCAO) to keep the equalized assessed value (EAV) of their home frozen at the base year level under 35 ILCS 200/15-172. Filing this one-page form on time is what stops your property tax bill from jumping when local assessments rise, and missing it almost always means losing the freeze for the year.

The Illinois Department of Revenue (IDOR) reports that more than 180,000 Illinois households renew the Senior Freeze each year, and county assessors estimate that roughly 1 in 7 renewals are rejected for income errors, missing signatures, or late filing. That rejection rate matters because a single missed renewal can add hundreds — sometimes thousands — of dollars to a senior’s next tax bill.

In this guide you will learn:

📋 What PTAX-329 actually does and who must file it every year
🧾 The exact documents and income figures to gather before you start
✍️ Line-by-line instructions for every box, with sample entries
👵 Three full filled-out scenarios using real fact patterns
⚠️ The most common mistakes that get renewals denied and how to avoid them

What the Form Is and Who Must File It

Illinois Form PTAX-329, officially titled the Certificate of Status — Senior Citizens Assessment Freeze Homestead Exemption, is the yearly renewal certificate that confirms a senior homeowner still meets every legal requirement for the freeze. The exemption itself is created by 35 ILCS 200/15-172, and the form is published by the Illinois Department of Revenue but processed at the county level. The current revision is the 2026 version (revision date printed in the lower left corner of the form), and you should always download a fresh copy each year because counties reject prior-year forms.

You must file PTAX-329 if you already received the Senior Freeze last year and want to keep it for the current tax year. To qualify, you must be 65 or older during the tax year, have owned and lived in the property as your principal residence on January 1 of both the base year and the current year, be liable for the property taxes, and have a total household income of $65,000 or less for the prior calendar year under the income limit set in Public Act 102-0895. Surviving spouses age 63 or older who inherited the freeze can continue it by filing PTAX-329, and homeowners holding title through a trust or life estate can also file as long as they have an equitable interest.

If this is your first time applying for the Senior Freeze, you do not file PTAX-329 — you file the initial application PTAX-340 instead. PTAX-329 is renewal-only. Filing the wrong one is the single most common procedural error and will delay your freeze by an entire tax year.

Before You Start: Documents and Information You Need

Gather everything below before opening the form. Missing any one item is the leading reason renewals stall at the county assessor’s office.

Property Index Number (PIN). This 14-digit number identifies your parcel and appears on every property tax bill; without it the county cannot match your renewal to your home.
Prior year’s federal income tax return (Form 1040). The county uses your AGI plus add-backs to verify household income; without it you cannot complete the Schedule of Income on the back of the form.
Social Security benefit statement (SSA-1099). Social Security counts toward total household income at the gross amount, not the net deposit, and missing this figure is the most common income error.
Pension and retirement statements (1099-R). All taxable and nontaxable distributions count toward household income.
Interest and dividend statements (1099-INT, 1099-DIV). Even tax-exempt municipal bond interest must be included.
Proof of age. A driver’s license, state ID, birth certificate, or passport showing you turned 65 by December 31 of the tax year.
Deed, trust, or life estate document. Required if title is held in a trust or life estate, because counties verify equitable ownership.
Prior year PTAX-329 or PTAX-340. Helps you match your base year EAV exactly to what is already on file.
Death certificate (if surviving spouse). Required to continue the freeze under the surviving spouse provision.
Spouse’s income documents. Even if your spouse is under 65, their income counts toward total household income.

If you are missing any item, request duplicates early. The Social Security Administration takes about 10 business days to mail a replacement SSA-1099, and trust amendments from an attorney can take weeks.

Where to Get the Form and How to Access It

The official PTAX-329 lives on the Illinois Department of Revenue property tax forms page as a fillable PDF, and most county assessors mail a pre-printed personalized copy to every senior already on the freeze rolls each spring. The pre-printed county version is the safest one to use because it arrives with your name, address, PIN, and base-year EAV already populated.

In Cook County, you renew through the Cook County Assessor’s online exemption portal, which auto-fills most of the form and lets you e-sign. DuPage County uses the DuPage County Supervisor of Assessments site, Lake County uses the Lake County Chief County Assessment Office page, and Will County uses the Will County Supervisor of Assessments site. Smaller downstate counties typically mail paper forms only.

If you cannot find your county’s version, call your township assessor first, then your county assessor. Never download PTAX-329 from a third-party tax-prep site, because outdated revisions are still circulating online and counties reject any form that does not match the current revision date printed on the official IDOR PDF.

Step-by-Step: How to Fill Out PTAX-329 Line by Line

PTAX-329 has a front side with applicant identification and certification, and a back side with the Schedule of Income. Complete every field in blue or black ink if filing on paper, or type directly into the PDF. Do not use pencil, white-out, or correction tape — counties reject altered forms under 35 ILCS 200/9-275.

Step 1: County Name (Top of Form)

The top line asks for the county where the property sits. Write the full county name in capital letters. Maria Lopez writes COOK in the county field for her Chicago condo.

If your home straddles two counties (rare, but possible along county lines), use the county that issues your property tax bill. A common mistake is writing the township name (like Evanston or Cicero) instead of the county, which causes the renewal to be misrouted and delayed by weeks. Many filers think the county on their mailing address controls; in fact, it is the taxing county on your bill that matters, and these can differ for properties near county borders.

Step 2: Tax Year

Enter the four-digit tax year you are renewing for, not the calendar year you are filing in. Robert Chen writes 2026 because he is renewing the freeze for the 2026 tax year, even though he files the form in spring 2026.

The tax year on PTAX-329 always matches the assessment year, which runs January 1 to December 31. The most common mistake is entering the prior year because filers think of the freeze as covering “last year’s income,” which causes the county to apply the renewal to the wrong cycle. Some seniors believe the tax year matches the year their tax bill arrives; in reality, the bill you pay in 2026 is for tax year 2025, but the renewal you file in 2026 is for tax year 2026.

Step 3: Applicant’s Name

Write your full legal name exactly as it appears on the deed and your Social Security card. Use the format Last Name, First Name, Middle Initial. Janet R. Williams writes WILLIAMS, JANET R.

If you took title under a maiden name and now use a married name, use the name on the deed and attach a copy of your marriage certificate. The most common mistake is using a nickname (Bob instead of Robert), which can break the cross-match with SSA records and trigger a hold. A widespread misconception is that “the assessor knows who I am from last year” — they do, but mismatched names still kick out of the automated matching system.

Step 4: Applicant’s Date of Birth

Enter your date of birth in MM/DD/YYYY format. Carlos Rivera writes 04/12/1959 because he turned 65 in April 2024 and qualifies for the 2026 renewal.

You must be 65 by December 31 of the tax year on the form, not by January 1. A surviving spouse age 63 or older may continue the freeze and writes their own date of birth, not the deceased spouse’s. The most common mistake is writing today’s date or the date the form is being completed, which immediately disqualifies the application. Many seniors believe they must be 65 on January 1 of the tax year; the statute actually allows qualification any time during the tax year.

Step 5: Property Index Number (PIN)

Copy the 14-digit PIN exactly from your most recent property tax bill, including all dashes. Aisha Johnson writes 17-04-444-022-0000 for her Chicago two-flat.

If your property has multiple PINs (common for parcels with a garage or vacant lot attached), list the primary residential PIN and write see attached for the others, then attach a list. The most common mistake is dropping a leading zero or transposing two digits, which causes the renewal to be applied to a stranger’s parcel. A frequent misconception is that the PIN is the same as your street address number; the PIN is a separate parcel identifier assigned by the county.

Step 6: Property Address

Enter the full street address of the homestead, including unit number, city, and ZIP code. Maria Lopez writes 1422 W BELMONT AVE UNIT 3, CHICAGO, IL 60657.

If your mailing address differs from the property address (for example, you receive mail at a P.O. Box or a relative’s home), there is a separate mailing address line — use both. The freeze applies only to the property where you actually live as your principal residence, and the most common mistake is listing a vacation home or rental property here, which constitutes false certification under 35 ILCS 200/9-275. A common misconception is that snowbirds who spend winters in Florida lose Illinois residency; you can keep the freeze as long as Illinois remains your principal residence and you do not claim a homestead exemption in another state.

Step 7: Phone Number and Email

Provide a daytime phone number and an email address if you have one. Robert Chen writes 312-555-0142 and rchen1959@gmail.com.

The county uses these only to contact you about missing information; they are not shared. The most common mistake is leaving these blank, which means the assessor mails a deficiency letter that may take two weeks to reach you, eating into your correction window. Many seniors worry that providing an email opens them to tax scams; counties never email payment requests, only notices to log in to the official portal.

Step 8: Ownership Status (Check Box)

Check the box that matches how you hold title: sole owner, joint tenant, tenant in common, trustee/beneficiary of a trust, or life estate holder. Janet Williams checks the joint tenant box because she and her late husband held the home in joint tenancy and she now owns it outright.

If you hold title through a living trust, you must check the trust box and attach the first and signature pages of the trust agreement showing your equitable interest. The most common mistake is leaving this blank because the filer is unsure of the technical term, which forces the county to research title and delays processing. A common misconception is that placing a home in a trust kills the freeze; trust ownership qualifies as long as the senior has an equitable interest under 35 ILCS 200/15-172(c).

Step 9: Use and Occupancy Date

Enter the date you began using the property as your principal residence. Carlos Rivera writes 06/15/1998 because he bought and moved into his Aurora home that summer.

This is not the closing date if you took possession later, and it is not the date you first received any exemption. The most common mistake is writing January 1 of the current year, which suggests you just moved in and disqualifies you from the base-year requirement. Many filers assume “use and occupancy” means the date the deed was recorded; the statute looks at the date of actual physical occupancy as your home.

Step 10: Base Year and Base Year EAV

The pre-printed county version of the form already shows your base year (the first year you received the freeze) and your base-year EAV. Maria Lopez sees Base Year: 2018 and Base Year EAV: $42,310 already printed and confirms both match her last assessment notice.

If you are using a blank IDOR PDF, look up these numbers on your prior PTAX-329 or call your county assessor; do not guess. The most common mistake is writing the current EAV here, which defeats the entire purpose of the freeze and can cause the county to recompute your savings to zero. A common misconception is that the base year resets each renewal; once established, the base year is permanent for as long as you own and occupy the home.

Step 11: Total Household Income (From Schedule of Income)

Carry the Total Household Income figure from Line 14 of the Schedule of Income on the back of the form. Aisha Johnson carries $48,720 from Line 14 of her Schedule of Income.

The cap for the 2026 tax year is $65,000 under Public Act 102-0895; one dollar over and you lose the freeze for the year. The most common mistake is using net Social Security instead of gross, which can artificially lower your reported income but is detected when the county cross-references SSA records. A widespread misconception is that “household” means only the applicant; it means everyone who lived in the home during the prior calendar year, including adult children whose income must be added.

Step 12: Schedule of Income (Back of Form, Lines 1–14)

The Schedule of Income reconstructs your total household income using federal AGI as the starting point and adding back items that are excluded for federal purposes but counted for the freeze.

Line 1 — Federal AGI. Copy from Form 1040, Line 11. Robert writes $32,400.
Line 2 — Tax-exempt interest. From Form 1040, Line 2a.
Line 3 — Nontaxable Social Security and railroad retirement. The portion of SSA-1099 not taxed federally still counts here.
Line 4 — Nontaxable pension and annuity income. The full distribution, not just the taxable portion.
Line 5 — Cash assistance from any government program. Includes TANF and General Assistance.
Line 6 — Workers’ compensation, occupational disease benefits.
Line 7 — Veterans’ benefits.
Line 8 — Child support received.
Line 9 — Lump-sum distributions and capital gains not in AGI.
Line 10 — Other income. Any income not listed above.
Lines 11–13 — Spouse and other household members’ income. Each gets a separate column.
Line 14 — Total Household Income. Sum all lines and columns.

The most common mistake on the Schedule is omitting nontaxable Social Security on Line 3 because filers think “if it’s not taxed, it doesn’t count.” A common misconception is that IRA rollovers are income; direct trustee-to-trustee rollovers are not, but cash withdrawals are.

Step 13: Applicant Signature, Date, and Notarization

Sign in blue or black ink, date the signature, and have the form notarized if your county requires it (Cook County does not require notarization for online filings, but most downstate counties still do). Janet Williams signs Janet R. Williams, dates 04/22/2026, and has the form notarized at her bank.

The signature certifies under penalty of perjury that every statement is true under 35 ILCS 200/9-275, and false certification is a Class A misdemeanor with a possible $7,500 penalty. The most common mistake is signing in pencil or having someone else sign for the applicant; a power of attorney is required for any signature other than the applicant’s own. A common misconception is that an electronic typed name counts as a signature on a paper filing — it does not, only on county portals that explicitly accept e-signatures.

Three Filled-Out Examples Using Real Scenarios

Scenario 1: Maria Lopez — Single Senior, Chicago Condo

Maria is 71, widowed, and lives alone in a Lakeview condo. Her only income is Social Security and a small IRA withdrawal.

Form Section	What Maria Enters
County	COOK
Tax Year	2026
Applicant Name	LOPEZ, MARIA E.
Date of Birth	09/03/1954
PIN	14-29-118-039-1015
Property Address	1422 W BELMONT AVE UNIT 3, CHICAGO, IL 60657
Ownership Status	Sole Owner
Use and Occupancy Date	05/12/2009
Base Year / Base EAV	2019 / $48,200
Total Household Income (Line 14)	$31,840
Signature	Maria E. Lopez, 03/15/2026

Scenario 2: Robert and Linda Chen — Married Couple, DuPage County

Robert just turned 65 last year; Linda is 62. They own their Naperville home jointly, and Linda still works part-time.

Form Section	What Robert Enters
County	DUPAGE
Tax Year	2026
Applicant Name	CHEN, ROBERT K.
Date of Birth	11/22/1960
PIN	07-15-302-014
Property Address	1133 RIVER OAKS DR, NAPERVILLE, IL 60540
Ownership Status	Joint Tenant with Spouse
Use and Occupancy Date	08/30/2002
Base Year / Base EAV	2025 / $112,400
Total Household Income (Line 14, includes Linda’s wages)	$58,920
Signature	Robert K. Chen, 04/02/2026

Scenario 3: Janet Williams — Surviving Spouse Continuation, Will County

Janet’s husband qualified for the freeze starting in 2015. He passed away in 2025, and Janet, now 64, is continuing the freeze under the surviving spouse provision.

Form Section	What Janet Enters
County	WILL
Tax Year	2026
Applicant Name	WILLIAMS, JANET R.
Date of Birth	07/19/1961
PIN	03-08-204-027-0000
Property Address	508 OAK MEADOW LN, JOLIET, IL 60431
Ownership Status	Surviving Spouse — Joint Tenant
Use and Occupancy Date	04/01/1991
Base Year / Base EAV	2015 / $54,800
Total Household Income (Line 14)	$42,150
Signature (with attached death certificate)	Janet R. Williams, 04/22/2026

How to File the Completed Form

Filing channels differ by county, and choosing the right one matters because each has its own deadline, fee, and proof-of-filing standard. The statewide statutory deadline is set by each county but is typically July 1 of the tax year under 35 ILCS 200/15-172(h).

Online (Cook County). Submit through the Cook County Assessor’s exemption portal using your PIN and the access code from your renewal letter. There is no fee. Processing takes about 4 to 6 weeks. Save the on-screen confirmation number as proof of filing.
Online (DuPage, Lake, Will). Use the DuPage SOA portal, Lake County CCAO, or Will County SOA. No fee. Confirmation emails serve as proof.
Mail. Send to the address printed on your county’s renewal letter. In Cook County the address is 118 N. Clark Street, Room 320, Chicago, IL 60602. No fee. Use USPS Certified Mail with return receipt for proof; processing takes 6 to 10 weeks.
In Person. Walk-in at your county assessor’s office. No fee. Ask the clerk to date-stamp a copy and keep it as proof. Same-day intake but processing still takes weeks.
Fax. Some downstate counties accept fax filings; call first to confirm. No fee. Keep the fax confirmation page.

Never pay anyone who claims they will file PTAX-329 for you for a fee — the form is free, and the Illinois Attorney General regularly warns about fee scams targeting seniors.

What Happens After You File

The county assessor verifies your age, residency, ownership, and income, and cross-references your Schedule of Income with IDOR records. If everything matches, the freeze is applied to your next assessment notice and the EAV stays at the base year amount, which directly lowers the taxable value used to compute your tax bill.

If something is missing, you will receive a Notice of Deficiency by mail giving you 30 days to respond. If your income exceeds $65,000, you receive a denial letter and can appeal to the Illinois Property Tax Appeal Board within 30 days. Approved renewals are not separately confirmed in most counties; the proof is on your assessment notice and your tax bill.

If you sell the home or move during the year, the freeze ends on the date you no longer occupy the home, and any tax savings tied to occupancy after that date must be repaid.

Mistakes to Avoid When Filling Out the Form

Filing PTAX-329 instead of PTAX-340 in your first year. The renewal form does not establish the freeze, so your application is rejected and you lose a year of savings.
Using net Social Security instead of gross. The county catches this on cross-match and either denies or recomputes, often pushing you over the $65,000 cap.
Forgetting to add a working spouse’s income. Household income includes everyone in the home, and omitting it is treated as misrepresentation.
Writing the current EAV in the base-year EAV box. This zeroes out your freeze benefit because the “frozen” value equals the new value.
Missing the county filing deadline. Late forms are not accepted for the current year, and you must wait until the next cycle to renew.
Leaving the ownership box blank. Forces manual title research and pushes your renewal past the deadline.
Signing in pencil or with whiteout corrections. Counties reject altered forms under 35 ILCS 200/9-275.
Transposing PIN digits. Routes the renewal to the wrong parcel and may quietly apply someone else’s freeze.
Listing a vacation home as the homestead. Constitutes false certification and can trigger a Class A misdemeanor charge.
Skipping Line 3 nontaxable Social Security. The most underreported income line and the leading reason for income-based denials.
Using last year’s PTAX-329 form. Counties reject prior-revision forms outright.
Failing to attach trust documents. Trust-held homes need pages 1 and signature page; otherwise the renewal is held indefinitely.

Do’s and Don’ts

Do’s

Do download the current revision from the IDOR forms page every year, because revisions change.
Do use gross income figures throughout, since the statute references gross household income.
Do file by certified mail or through the official portal so you have date-stamped proof.
Do keep a complete copy of the signed form and every attachment for at least 4 years, the audit lookback window.
Do file early in the spring, well before the July deadline, to leave time to correct errors.
Do update your county assessor immediately if you move, marry, or divorce, since each event affects eligibility.

Don’ts

Don’t sign the form before completing the Schedule of Income, because the certification covers the income figures.
Don’t let a paid “filing service” charge you — the form is free at every county.
Don’t combine multiple parcels onto one form unless the county explicitly tells you to.
Don’t assume your township assessor forwards the form to the county; in most counties you must file with the CCAO directly.
Don’t ignore a Notice of Deficiency — the 30-day response window is strict.
Don’t round income figures to the nearest hundred; use exact dollars from your tax return.

Pros and Cons of Filing on Your Own vs. With Help

Pros of filing on your own

It is free, since the form has no filing fee at any Illinois county.
The form is one page front and back, much simpler than most tax filings.
Online portals in Cook, DuPage, Lake, and Will counties auto-fill prior-year data.
You retain control over your income figures and can verify them line by line.
Filing yourself avoids the scam risk that comes with paid “senior tax help” solicitations.

Cons of filing on your own

Income reconstruction can be confusing if you have multiple 1099s and nontaxable income streams.
Trust ownership creates legal nuance most filers are not equipped to handle alone.
Surviving spouse continuations require precise documentation that is easy to miss.
A single-line error on the Schedule of Income can cost the entire year’s freeze.
If denied, the appeal to the Property Tax Appeal Board is more technical than the original filing.

FAQs

Do I need to file PTAX-329 every single year?

Yes. The Senior Freeze is not automatic; you must file PTAX-329 every year by your county’s deadline, even if your income and ownership have not changed since last year.

Can I file PTAX-329 if I just turned 65 this year?

No. First-time applicants file PTAX-340 to establish the freeze; PTAX-329 is only the renewal form for seniors already approved.

Do I write my gross or net Social Security on Line 3?

Yes — use gross. Report the full SSA-1099 box 5 amount, not the net deposit after Medicare premiums, because the statute counts the gross benefit toward total household income.

Is my spouse’s income counted if they are under 65?

Yes. Total household income includes every household member’s income for the prior calendar year, regardless of age, including a spouse who has not yet turned 65.

Can I list my P.O. Box as the property address in Step 6?

No. Step 6 must list the physical street address of the home you live in, because the freeze attaches to the parcel; use the separate mailing address line for a P.O. Box.

Do I need to notarize PTAX-329?

No in Cook County for online filings, but yes in most downstate counties for paper filings. Check your county assessor’s instructions before you sign.

What if my income is one dollar over $65,000?

No freeze that year. The cap under Public Act 102-0895 is strict, and even a single dollar over disqualifies you for that tax year, though you can reapply next year if income drops.

Can my adult child sign PTAX-329 for me?

No, unless they hold a recorded power of attorney for property matters. The applicant must sign personally, because the certification is sworn under penalty of perjury.

Do I write the current EAV or the base-year EAV in Step 10?

Yes — base-year EAV. Step 10 always shows the EAV from the year you first received the freeze, not the current assessment, because the freeze locks in that base-year figure.

Will I lose the freeze if I spend winters in Florida?

No, as long as Illinois remains your principal residence and you do not claim a homestead exemption in any other state.

Does income from a Roth IRA conversion count on the Schedule?

Yes. Roth conversions appear in federal AGI and flow through Line 1, so they count toward total household income for the freeze.

Can I appeal a denial of my PTAX-329?

Yes. File an appeal with the Illinois Property Tax Appeal Board within 30 days of the denial notice, or first request reconsideration with your county assessor.

What happens if I miss the July deadline?

No late filings are accepted for that tax year in most counties. You must wait until the following year’s renewal cycle, and you lose the freeze savings for the missed year.

Do I need to attach my federal tax return?

No in most counties, but yes if your county assessor specifically requests it during verification. Always keep a copy ready for 4 years in case of audit.

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