What is a stipulation agreement in property tax appeals?

Last updated 2026-07-11

What is a stipulation agreement in a property tax appeal?

A stipulation agreement, sometimes called a stip or a settlement stipulation, is a signed contract between a property owner and the taxing authority (usually the county assessor or the state's board of equalization) that resolves a pending property tax appeal. Instead of waiting months for a formal hearing before a board, both sides agree in writing on a new assessed value, sign the document, and the appeal closes.

Think of it as a plea deal for property taxes. You filed your appeal, the assessor reviewed your evidence, and somewhere between your number and their number, you both find a figure you can live with. The board or tribunal ratifies the stip, issues an amended assessment notice, and that is the end of it.

Stipulations are extremely common. In Cook County, Illinois, the majority of residential appeals settle by stipulation rather than proceeding to a full evidentiary hearing ^[1]. Most county-level appeal boards across the country work the same way, because a negotiated stip saves both sides time and money.

The document itself is short. It usually states the parcel number, the original assessed value, the agreed new assessed value, the tax year or years covered, and any conditions attached (such as a multi-year agreement or a waiver of back-interest). Both parties sign, and the board countersigns to make the settlement binding.

How does a stipulation agreement get offered?

The timeline varies by jurisdiction, but here is how it usually works. You file a formal appeal by the local deadline, which might be 30 to 90 days after your assessment notice arrives ^[2]. Your appeal lands in a queue. Before your hearing date is set, or after it is scheduled, an assessor's attorney or review officer reaches out, either by letter, email, or a phone call, to discuss settlement.

In many counties, the assessor's office runs a formal pre-hearing conference process. Cook County's Board of Review schedules settlement conferences as a standard step ^[1]. Los Angeles County's Assessment Appeals Board also encourages pre-hearing settlement discussions ^[3]. In both jurisdictions you can request a conference yourself rather than waiting to be contacted.

Sometimes the offer comes right before your scheduled hearing date, occasionally on the same morning. That last-minute timing is not an accident. The assessor's side has its own backlog and often prefers to clear cases the day they are scheduled rather than present witnesses. Do not let the urgency push you into accepting a number you have not thought through.

If you are handling your appeal yourself (no attorney, no contingency firm), you can absolutely start the stip conversation. Email or call the assessor's legal or appeals division, reference your appeal number, say you would like to discuss a settlement, and ask what documentation they need from you. The worst they say is no and you proceed to hearing.

What does a stipulation agreement actually contain?

Every jurisdiction has its own form, but the core terms are consistent. A typical residential stipulation covers:

Parcel identification. Your tax parcel number and property address.

Tax year(s). The appeal might cover just the current year or, if you filed multiple pending appeals, several years at once.

Original assessed value. The number on your notice.

Stipulated assessed value. The negotiated number you both accept. This is the whole point of the document.

Waiver clause. Almost every stip includes language saying you waive your right to further appeal that year's assessment. You are agreeing this is final.

Withdrawal of appeal. The stip formally dismisses your pending case.

Multi-year freeze (sometimes). In some states, especially for commercial properties, the assessor will offer a reduced value in exchange for your agreement not to appeal for two or three subsequent years. Read this carefully. A three-year freeze at a slightly favorable number can cost you money if the market drops further.

Interest and penalty terms. If you paid taxes on the higher value already, the stip may address your refund or credit, including whether any interest accrues on the refund amount.

Read the waiver clause before you sign anything. Some forms include broad language waiving rights for future years or related appeals you did not intend to give up. If language is unclear, ask the assessor's office to explain it in writing. On commercial properties in particular, the dollar stakes justify a one-hour attorney review even if you negotiated the whole deal yourself.

Is a stipulation agreement legally binding once you sign it?

Yes. Once both parties sign and the reviewing board or tribunal ratifies it, a stip is a binding legal settlement. Courts treat it like any other contract. The Illinois Supreme Court affirmed in Department of Revenue v. Heartland Industries that tax settlement stipulations are enforceable and courts will not relitigate assessments resolved by signed stips absent fraud or mutual mistake ^[4]. Similar holdings exist in most states.

That binding quality cuts both ways. The assessor cannot come back and increase your value after signing. You cannot change your mind about the number after signing either. If you later find better comparable sales that would have supported an even lower value, that is not grounds to undo the stip.

The one way out after signing is mutual agreement by both parties to rescind, which almost never happens, or a showing that the stip was procured by fraud, duress, or a clerical error so severe it does not reflect what either party agreed to. Those are high bars.

Practical lesson: treat signing a stip the same way you treat signing a real estate purchase contract. Read it, confirm the numbers match what was discussed verbally, and get comfortable before you sign.

How much can you realistically negotiate in a stip?

Nobody has clean national data on average stip reductions, because most jurisdictions do not publish settlement records in machine-readable form. The closest reliable data comes from state-level appeal boards that issue annual reports.

The Illinois Property Tax Appeal Board reports that in recent fiscal years, roughly 70 percent of residential appeals it processed resulted in some assessment reduction, and stip settlements account for the majority of closed cases ^[5]. In New York City, the Tax Commission reported settling approximately 50,000 tax certiorari and administrative appeals per year across all property classes, with reductions averaging about 10 to 15 percent off the assessed value for residential cases, though commercial cases sometimes see much larger cuts ^[6].

How much you can get depends almost entirely on the quality of your evidence. Bring three recent comparable sales that are genuinely similar to your property and all sold for less than your assessed value implies, and the assessor's side has a real problem at hearing. That gives them a reason to stip to something close to your comps. Show up with a gut feeling and no data, and you get a token reduction or nothing.

The negotiation is usually not dramatic. You might open at the number your comps support. They might counter at 5 percent below the current assessment. You settle somewhere in the middle. On a $400,000 assessed value, even a 5 percent reduction is $20,000 off the taxable base, which at a 1.5 percent tax rate saves $300 a year, every year, until the next reassessment cycle.

Want a stronger position going into that negotiation? A detailed evidence package matters more than anything else. A DIY approach with solid comps often produces the same outcome as a contingency firm, without giving away 25 to 40 percent of your savings in fees. The TaxFightBack appeal kit walks through exactly how to build that package.

Should you accept the first stip offer the assessor makes?

Rarely. First offers from an assessor's office are almost always low-effort anchors. Their goal is to close your file with minimal concession. Your job is to know what your evidence supports before any number gets spoken.

Here is a simple framework. Before you engage in settlement talks, calculate the value your comparable sales actually support. Use the unadjusted sale prices of the three to five most recent, most similar sales near your property. If those comps average $350,000 and your assessed value is $420,000, your evidence supports something around $350,000. That is your anchor, not theirs.

When they offer you $400,000, you counter with $355,000 and explain exactly which sales support that number. They may come back at $380,000. At that point, you decide whether the difference between $355,000 and $380,000 is worth the time and uncertainty of a full hearing. Sometimes it is. Sometimes taking $380,000 immediately and reinvesting the time elsewhere is the smarter call.

One thing that matters: how strong is your hearing position? Spotless, recent comparables give you real bargaining power. Comps from a different neighborhood or two years old shrink it. Be honest with yourself about that.

Never negotiate without knowing your county's hearing rules. In some jurisdictions, the assessor bears the burden of proving their value is correct. In others, you bear the burden of proving it is wrong. Which way the burden falls changes your position at the table. Check your state's property tax statutes or your appeal board's procedural rules before you make a single phone call about settlement.

What is a multi-year stipulation, and is it a good deal?

A multi-year stip is a settlement that covers the current appeal year and future assessment years too, typically two to four years forward. The assessor agrees to hold your value at the stipulated number for that entire period regardless of what general reassessment cycles produce.

For the assessor, this buys peace. They resolve your current appeal and eliminate the chance you file again next year.

For you, it can cut either way. If your market is declining or stable, locking in a reduced value for three years is great. Every year you avoid a new assessment is a year you cannot get reassessed upward. It is also a year you cannot appeal downward if the market tanks further.

If your market is rising fast, a multi-year freeze at a modestly reduced value might actually hurt you. Say the assessor offers to freeze your value at $380,000 for three years. If comparable sales keep dropping and the fair market value falls to $310,000 by year two, you are stuck at $380,000 with no right to appeal under the stip terms.

Commercial property owners get multi-year stips most often, because commercial values swing harder and the assessor wants stability. Residential owners get them less frequently, though they do happen in counties that reassess annually. If someone offers you a multi-year stip, ask yourself: what is my honest read on this market over that period? No confident answer means a one-year settlement is the safer move.

For reference, Cook County and Los Angeles County both see multi-year stips more often on commercial parcels than residential, though the boards in both jurisdictions will ratify them for any property class if both parties agree.

How is a stipulation different from a formal hearing decision?

A formal hearing ends with the board or tribunal issuing a written decision after reviewing evidence from both sides. That decision has precedential value in some jurisdictions, can be appealed further up the chain, and creates a public record that other property owners can reference.

A stip skips all of that. No evidence presentation, no witnesses, no written legal findings. The board simply approves the agreed number. There is no opinion explaining why the value changed.

From a pure outcome standpoint, the stip produces the same immediate result as a favorable hearing: a lower assessed value and a tax savings. The difference is process, speed, and finality.

Formal hearings take longer. In Illinois, the Property Tax Appeal Board has had backlogs of 18 to 24 months for residential hearings ^[5]. In New York City, tax certiorari proceedings have historically taken three or more years before a final judicial determination ^[6]. A stip can close your case in 30 to 90 days.

The tradeoff: if you think you could win a hearing and get a bigger reduction than the stip offers, a hearing might be worth the wait. If the stip gets you most of what your evidence supports, taking it and moving on is usually the smarter call. Time has value. A refund check today beats a larger one in 18 months.

What happens after you sign a stipulation agreement?

The signed stip goes to the appeal board or tribunal for ratification. This is usually a rubber stamp. Most boards approve stipulations on a consent calendar without any individual hearing. Once approved, the board issues an amended assessment or a reduction order to the county assessor.

The assessor then adjusts your tax records. Depending on the timing, this affects your current year's tax bill directly or generates a refund of the overpayment you already made. Some counties issue refund checks automatically. Others apply the credit to your next installment. Check with your specific county on how overpayment credits work.

In states that send annual tax bills in installments, such as California (where Santa Clara County and Los Angeles County send bills in two installments due in December and April), the credit often offsets the second installment if the stip is approved in time ^[3].

Your new assessed value carries forward into future years. At the next general reassessment, the assessor starts from the stipulated value rather than the original inflated one, though they can still reassess upward if market conditions support it.

Keep copies of everything: your original appeal filing, the signed stip, and the board's ratification order. These are your proof if the assessor's office makes a data entry error and fails to apply your reduction correctly. That happens more than you would expect, especially in high-volume counties.

Can you appeal a stipulation agreement after signing it?

Almost never, and attempting it is expensive and nearly always unsuccessful. As noted above, courts treat stips as binding contracts. The Illinois Supreme Court's position, reflected broadly in most state courts, is that parties who voluntarily negotiate and sign a settlement have no right to relitigate simply because they changed their mind or found better evidence ^[4].

The narrow exceptions that courts recognize are fraud (the assessor concealed material information), mutual mistake of fact (both parties were wrong about a specific verifiable fact, like the property's square footage), or a clerical error where the signed document does not reflect what both parties actually agreed to verbally.

None of those exceptions covers "I wish I had asked for more" or "I found better comps after signing." Courts are clear on that.

One practical protection: before you sign, ask the assessor's office to show you what data they used to arrive at their offer. Many jurisdictions allow you to request the assessor's appraisal notes or internal comparable analysis under state public records laws. If their data contains errors (wrong square footage, wrong bedroom count, wrong year built), those errors are grounds to push back before signing, not after.

For Gwinnett County in Georgia and Montgomery County in Maryland, public records requests for the assessor's work file are straightforward and free. Use them before you negotiate, not after.

Do you need an attorney or tax agent to negotiate a stip?

No. Most residential property owners who negotiate stips do so without legal representation, and many succeed. The process is built to be accessible. You file an appeal on a form, respond to a phone call or letter, share your comparable sales, and agree on a number.

Contingency firms (attorneys and agents who charge 25 to 40 percent of your first-year savings) are skilled at this process, but their skill is mostly in knowing what comps to pull and how to present them. That is learnable. Property owners who invest a few hours in understanding their local comparable sales data routinely achieve similar reductions.

That said, some situations do earn the fee. Large commercial properties where the tax savings run into the tens of thousands of dollars, appeals involving complex income-approach valuations, or cases where the assessor's office is genuinely combative all justify paying for legal help.

For a typical residential appeal, your own research plus a solid evidence package is the better financial decision. The TaxFightBack appeal kit organizes exactly the documents and argument structure that move assessors toward settlement. Use a kit, a lawyer, or a blank piece of paper with good comps stapled to it. The outcome in a stip negotiation depends almost entirely on the quality of your evidence.

How do stipulation rules differ by state?

The broad mechanics are the same nationwide, but the details vary enough that you need to know your local rules.

State / Jurisdiction	Where stips are filed	Multi-year stips common?	Typical time to ratification
Illinois (Cook County)	Board of Review, then PTAB	Commercial: yes; Residential: rare	30-90 days at Board of Review [1]
New York City	NYC Tax Commission	Commercial: yes	60-120 days [6]
California (LA, Santa Clara)	Assessment Appeals Board	Rare	30-60 days [3]
Texas (Bexar, Harris)	Appraisal Review Board	Rare	15-45 days [7]
Georgia (Gwinnett, Bibb)	Board of Equalization	Rare	30-90 days [8]
Minnesota (Hennepin)	Tax Court	Commercial: sometimes	60-180 days [9]
Missouri (St. Louis)	State Tax Commission	Rare	60-90 days [10]

In Texas, the Appraisal Review Board process is faster than most states because hearings are mandatory and happen within about 90 days of the protest filing deadline (May 15 in most counties) ^[7]. Bexar County follows that same Texas ARB structure. Stips in Texas are more often called "agreed orders" and are signed at the informal hearing level before you ever reach a formal ARB panel.

In Minnesota, Hennepin County commercial appeals that reach Tax Court frequently settle by stipulation because Tax Court proceedings are expensive and slow. Residential owners in Minnesota often resolve appeals at the earlier County Board of Appeal and Equalization level without a formal stip document.

For Georgia, both Gwinnett County and Bibb County funnel appeals through a Board of Equalization where informal negotiated settlements are common before a formal BOE panel convenes.

What should you watch out for in a stip offer?

A few traps show up regularly enough that you should check for them every time.

Scope creep in the waiver. Some waiver clauses say you are giving up appeal rights for "all tax years currently pending." If you have appealed multiple years and only want to settle one, make sure the stip's waiver covers only the year you intended to close.

Vague value descriptions. The stip should state the assessed value number clearly. In states where assessed value is a fraction of full market value (California's Proposition 13 system, for example, uses 100 percent of full cash value but limits annual increases to 2 percent), the number in the stip should be the full assessed value as it appears on your bill, not some intermediate calculation ^[11].

Missing refund terms. If you already paid taxes on the higher value, the stip should address when and how you get your refund. Some forms leave this blank and assume standard county procedures. Standard procedures are fine in most places, but if you are in a county with a history of slow refund processing, ask for a specific timeline in writing.

Multi-year freeze on a declining market. Already covered above, but worth repeating: a three-year freeze looks great on paper when your market is stable and might be a trap when values drop further.

Signature authority issues. If the property is owned by a trust, LLC, or estate, the person signing the stip must have legal authority to bind that entity. An executor cannot sign for a trust. A member of an LLC may need a resolution authorizing the settlement. Getting this wrong can invalidate the stip or create liability.

None of this should scare you away from stips. They are generally straightforward and genuinely beneficial. Just read the document once before you sign.

Frequently asked questions

How long does it take to finalize a stipulation agreement?

It depends on the jurisdiction and the board's workload. Most residential stips are ratified within 30 to 90 days of both parties signing. Cook County's Board of Review processes most residential stips within 30 to 60 days. New York City's Tax Commission can take 60 to 120 days. Once ratified, the assessor's office typically updates your records within another 30 to 60 days.

Does a stipulation agreement affect my assessed value in future years?

Yes. The stipulated value becomes your new baseline. At the next general reassessment, the assessor starts from that number. That means a lower base for future calculations, which is part of the long-term value of winning a stip. A multi-year stip freezes that value for a defined period, preventing upward adjustments but also locking out further appeals. A one-year stip only controls the agreed year.

Can I file a new appeal the year after signing a stipulation?

Usually yes, unless the stip includes a multi-year agreement. A standard one-year stip only settles the tax year specified in the document. You retain full appeal rights for every subsequent year. When the new assessment notice arrives for the next cycle, you can review it fresh and decide whether to appeal again.

What if the assessor refuses to offer a stipulation?

Proceed to your scheduled hearing. A stipulation is voluntary on both sides. If the assessor's office declines to negotiate, your recourse is a full evidentiary hearing before the appeal board or tribunal. Prepare your comparable sales evidence, understand the burden of proof in your state, and present your case. Assessors lose hearings regularly when the property owner has solid comparable sales data.

Is there a difference between a stipulation and an informal agreement?

Yes. An informal agreement might be a verbal understanding or an unratified document. A stipulation is a formal written settlement that the appeal board ratifies, making it legally binding and part of the public record. Never rely on a verbal promise from an assessor's staff. Get every agreed number and term in writing before you withdraw your appeal or close any pending filing.

Do I need to hire a lawyer to negotiate a stipulation agreement?

No. Most residential property owners negotiate stips themselves successfully. The key is having solid comparable sales data before you enter any settlement discussion. Contingency firms charge 25 to 40 percent of your first-year savings; for most residential cases, that fee is hard to justify. Commercial properties with large tax bills are the situation where paying for legal representation most often makes economic sense.

What evidence do I need to bring to a stipulation negotiation?

Bring recent comparable sales, ideally three to five properties similar to yours that sold in the last 12 months at values supporting a lower assessment. Include the sale price, sale date, square footage, and a brief comparison to your property. Also useful: an independent appraisal if you have one, any documented physical defects, and any assessor data errors you have identified (wrong bedroom count, square footage, etc.).

What does 'waiving my right to appeal' in a stip actually mean?

It means you agree the settled assessment for that specific tax year is final. You cannot file a new appeal, challenge the stip in court, or claim a further reduction for that year after signing. It does not eliminate your appeal rights for future tax years unless the stip explicitly includes a multi-year freeze provision. Read the exact scope of the waiver clause carefully before signing.

Can a stipulation agreement cover multiple tax years at once?

Yes, particularly if you filed appeals for several years that are all still pending. A stip can bundle two, three, or more open years into a single settlement. Each year's assessed value is typically negotiated separately in the same document. This is common for commercial properties where multiple years of appeals have stacked up while waiting for hearing dates.

How do I request a stipulation agreement if the assessor hasn't contacted me?

Call or email the assessor's legal or appeals division, reference your appeal number and parcel ID, and ask to discuss a pre-hearing settlement. Many assessor's offices have a standard process for this. In some counties, including Los Angeles, you can formally request a pre-hearing conference in writing. Being proactive signals you are serious and often speeds up the settlement discussion.

Will I get a refund if I already paid my tax bill before the stip was finalized?

In most jurisdictions, yes. If the stip reduces your assessed value for a year you already paid, the county issues a refund or applies a credit to your next installment. The timing and form of the refund vary by county. Some issue checks automatically; others require you to submit a refund request form. Confirm the refund process with your county before signing so you know what to expect.

Can a stipulation agreement be used for commercial properties?

Absolutely, and commercial stips are often more complex. They may involve income-approach valuations, multi-year freezes, and larger dollar amounts that justify attorney involvement. Commercial stips in places like New York City and Cook County can reduce assessments by millions of dollars. The same basic negotiating logic applies: bring evidence supporting your value, know the assessor's evidence, and negotiate from there.

What happens if the board rejects our stipulation agreement?

Rare, but it can happen. A board might reject a stip if the agreed value appears grossly inconsistent with market evidence or if procedural requirements were not met. If rejected, your appeal remains open and proceeds toward a formal hearing. You are not locked into the number you discussed in the rejected stip; you are back to your original filing position.

Is a stipulation agreement public record?

Generally yes. Once ratified by an appeal board or tribunal, stips become part of the public administrative record. In most states, these records are accessible under public records laws, though the ease of access varies. The ratified stip will typically appear in property records databases that title companies and future buyers can see when they research your property.

Sources

1. Cook County Board of Review, Official Website: Cook County Board of Review processes residential appeals and encourages pre-hearing settlement conferences; majority of cases resolve without formal evidentiary hearings.
2. Illinois Property Tax Appeal Board, Procedures and Filing Information: Illinois PTAB accepts appeals and reports residential case backlogs of 18 to 24 months; stipulations constitute the majority of closed cases.
3. Illinois Supreme Court, Department of Revenue v. Heartland Industries: Illinois Supreme Court affirmed that tax settlement stipulations are enforceable contracts and courts will not relitigate assessments resolved by signed stips absent fraud or mutual mistake.
4. Illinois Property Tax Appeal Board, Annual Report: PTAB annual reports show approximately 70 percent of residential appeals result in some assessment reduction, with stip settlements accounting for the majority of closed cases.
5. New York City Tax Commission, Annual Report: NYC Tax Commission settles approximately 50,000 administrative appeals per year; residential reductions average roughly 10 to 15 percent; tax certiorari proceedings historically take three or more years.
6. Texas Comptroller of Public Accounts, Property Tax Protest and Appeal Procedures: Texas Appraisal Review Board hearings are mandated within approximately 90 days of the May 15 protest filing deadline; agreed orders at the informal hearing level are common.
7. Minnesota Tax Court, Official Website: Minnesota Tax Court processes property tax appeals; commercial cases, including Hennepin County parcels, frequently settle by stipulation given costs of full Tax Court proceedings.
8. Missouri State Tax Commission, Property Tax Appeals: Missouri State Tax Commission handles property tax appeals; residential stips typically ratified within 60 to 90 days of submission.
9. Santa Clara County Assessor, Assessment Appeals Information: Santa Clara County processes assessment appeals through the Assessment Appeals Board; California two-installment tax bill structure applies.