AB 325 Rent Pricing Algorithm Law: What California Landlords and Property Managers Should Know (2026)

California AB 325 rewrites the rules for how landlords and property managers can use pricing software to set rents. Signed by Governor Newsom on October 6, 2025, and effective January 1, 2026, the law amends the Cartwright Act -- California's primary antitrust statute -- to explicitly target "common pricing algorithms" that use competitor data to influence rental rates. For landlords in Roseville, Sacramento, and across Placer County who rely on rent-pricing tools, AB 325 demands a closer look at how those tools work and where their data comes from.

The short version: AB 325 does not ban rent pricing software. It bans using shared algorithms that pool nonpublic competitor data to coordinate pricing across multiple landlords or property management companies. If your pricing tool uses only your own portfolio data and publicly available market information, you are likely in the clear. If it ingests private rent data from competing properties to generate recommendations, you have a compliance problem.

TL;DR: AB 325 (Chapter 438, Statutes of 2025) adds Sections 16729 and 16729.5 to California's Cartwright Act, making it explicitly unlawful to use or distribute a "common pricing algorithm" -- defined as any methodology used by two or more persons that uses competitor data to set or influence prices -- as part of a conspiracy to restrain trade. The law also creates standalone liability for coercing others to adopt algorithm-recommended prices. Corporate fines under the Cartwright Act increased to $6 million per violation under companion bill SB 763 (Alston & Bird; California Apartment Association).

What Is AB 325 and Why Should California Landlords Care?

AB 325 was authored in direct response to growing federal and state scrutiny of algorithmic pricing in the rental housing industry. The Department of Justice filed an antitrust complaint against RealPage Inc. in 2024, alleging that its revenue management software enabled landlords to coordinate rent increases by sharing nonpublic pricing data through a common algorithm (ProPublica). That case resulted in a proposed settlement in November 2025 that fundamentally restricts how these tools operate.

California's legislature did not wait for the federal case to resolve. AB 325 codifies the principle at the state level: using shared algorithms trained on competitor data to set prices is a Cartwright Act violation, regardless of whether formal collusion is proven. The law removes the need for plaintiffs to prove an explicit agreement -- the use of the shared algorithm itself can establish the violation.

For Sacramento and Roseville landlords, this matters because algorithmic pricing tools have become increasingly common in property management. Whether you use enterprise software like RealPage or Yardi, or smaller tools that pull "market comps" from competitor listings, you need to understand what AB 325 actually prohibits -- and what it does not.

What AB 325 Actually Prohibits (and What It Does Not)

The biggest source of confusion around AB 325 is the assumption that it bans all pricing software. It does not. The California Apartment Association (CAA) has publicly clarified this point: AB 325 targets the shared, multi-user use of algorithms trained on nonpublic competitor data -- not individual pricing tools that analyze your own portfolio.

Here is the legal distinction that matters:

Activity	AB 325 Status	Why
Using software that analyzes only your own rent rolls, vacancy data, and expenses	Permitted	Single-firm data; no "common" algorithm
Using publicly available rental listings (Zillow, Apartments.com) to set comps	Permitted	Public data is not "competitor data" under the Act
Subscribing to a platform that pools private rent data from multiple landlords and generates price recommendations	Prohibited	Meets the "common pricing algorithm" definition -- two or more users, competitor data, price influence
A software vendor coercing you to accept its algorithm's recommended rent	Prohibited	Section 16729(b) standalone coercion violation
Hiring a local property manager who sets rent based on their own market knowledge and public comps	Permitted	Human judgment using public information
Two landlords verbally agreeing to match each other's rents	Already illegal	Classic price-fixing under existing Cartwright Act

The critical term is "common pricing algorithm," which AB 325 defines as "any methodology, including a computer, software, or other technology, used by two or more persons, that uses competitor data to recommend, align, stabilize, set, or otherwise influence a price or commercial term" (California Legislature -- AB 325 Text).

The Two Prongs of Liability

AB 325 creates two separate paths to liability:

1. Section 16729(a) -- Algorithm as conspiracy tool: It is unlawful to use or distribute a common pricing algorithm as part of a contract, combination, or conspiracy in restraint of trade. This is the main provision targeting platforms like RealPage that aggregate private data across competing landlords.
2. Section 16729(b) -- Coercion to adopt recommendations: It is independently unlawful to use or distribute a common pricing algorithm if the entity "coerces another person to set or adopt a recommended price." This targets software vendors who pressure property managers to accept algorithmic recommendations rather than treating them as optional inputs.

Both prongs carry the enhanced penalties under companion bill SB 763: up to $6 million per violation for corporations, up to $1 million per violation for individuals, and civil penalties of up to $1 million per violation in cases brought by the California Attorney General or a district attorney (Mogin Law LLP).

The RealPage Lawsuit: Why AB 325 Was Written

AB 325 did not emerge in a vacuum. The law was a direct legislative response to the federal antitrust case against RealPage, which alleged that the company's revenue management software functioned as a price-fixing mechanism for the rental housing industry.

What RealPage's Software Did

RealPage's YieldStar and AI Revenue Management products aggregated nonpublic rent data -- actual lease rates, concession details, occupancy figures -- from competing landlords who subscribed to the platform. The software then generated rent recommendations for each property based on this pooled competitor dataset. The DOJ alleged this created a de facto price-fixing arrangement: landlords who would normally compete on price were instead coordinating through a shared algorithm (NPR).

The proposed DOJ settlement, announced in November 2025, imposes significant restrictions on RealPage going forward:

• No real-time competitor data: RealPage can no longer use current nonpublic competitor data in its pricing recommendations
• 12-month data aging requirement: Any nonpublic data used to train algorithms must be at least one year old
• Auto-accept removal: Software features that automatically implemented recommended rents without landlord review must be redesigned or removed
• Governor guardrails eliminated: Features that prevented landlords from setting rents below the algorithm's recommendation must be removed
• Court-appointed monitor: A compliance monitor with code-level access will oversee RealPage for seven years

More than two dozen property management companies reached settlements related to their use of RealPage. Greystar, one of the nation's largest landlords, agreed to pay $50 million to settle a class action and $7 million to settle a separate lawsuit filed by nine state attorneys general (Mintz).

Pro Tip: Even if you never used RealPage directly, the legal principles from the DOJ settlement now inform how California courts will interpret AB 325. Any software that pools nonpublic competitor data across multiple users to generate pricing recommendations is at risk. Ask your software vendor directly: "Does this tool use nonpublic data from other landlords to generate my rent recommendations?" If the answer is yes -- or unclear -- consult an attorney.

The Lower Pleading Standard: Why Lawsuits Just Got Easier to File

AB 325 does more than just define and prohibit common pricing algorithms. It also lowers the bar for filing antitrust lawsuits in California, which has major implications for landlords.

Under the previous pleading standard, a plaintiff bringing a Cartwright Act claim had to allege facts that "tend to exclude the possibility of independent action" -- meaning the plaintiff had to show that the defendants' behavior could not be explained by each party acting independently. This was a high bar borrowed from federal antitrust precedent.

AB 325 replaces this with a simpler "plausibility" standard: a complaint now only needs to allege "factual allegations demonstrating that the existence of a contract, combination in the form of a trust, or conspiracy to restrain trade or commerce is plausible" (Cleary Gottlieb).

In practical terms, this means:

• Tenants, tenant advocacy groups, and the Attorney General can file antitrust lawsuits against landlords more easily
• Cases are less likely to be dismissed at the initial pleading stage
• Landlords who use shared pricing tools face higher litigation risk, even if they believe their use is legitimate
• The cost of defending against antitrust claims -- which can exceed $100,000 in legal fees before trial -- becomes a practical concern for landlords of all sizes

This is a significant shift. For landlords in Sacramento and Placer County, the lower pleading standard means that a tenant who suspects algorithmic pricing coordination no longer needs to prove it definitively to get a case into court. They only need to make the allegation plausible.

Who Is Actually Affected? Small Landlords vs. Large Operators

The RealPage lawsuit targeted large multifamily operators with thousands of units. So should a landlord with a duplex in Rocklin or a fourplex in Lincoln worry about AB 325? The answer depends entirely on the tools you use.

Large Operators (50+ Units)

If you operate a portfolio of 50 or more units and subscribe to enterprise revenue management software, AB 325 directly affects your operations. These platforms are most likely to meet the "common pricing algorithm" definition because they aggregate data from multiple property owners. Review your software contracts and data-sharing agreements immediately.

Mid-Size Landlords (5-50 Units)

Mid-size landlords in the Sacramento and Placer County market typically use tools like AppFolio, Buildium, or Rent Manager for property management. These platforms offer rent pricing features, but the critical question is whether they pool competitor data. Most mid-size PM software tools generate rent suggestions based on public MLS data, Zillow listings, and Census Bureau statistics -- which is permitted under AB 325. Confirm this with your vendor in writing.

Small Landlords (1-4 Units)

If you own a single-family rental in Roseville or a small multifamily property and set rent by checking Zillow, Craigslist, and Apartments.com, AB 325 has no practical impact on your pricing process. You are using public data and your own judgment -- the opposite of what the law targets.

However, even small landlords should understand AB 325 because it reflects a broader regulatory trend. California is increasingly treating rental pricing as a consumer protection issue, not just a market-driven one. Future legislation may expand beyond algorithmic pricing to other forms of rent-setting coordination.

AB 325 Compliance Checklist for California Landlords

Whether you manage two units or two hundred, here is a practical compliance checklist. These steps protect you from both AB 325 liability and the broader antitrust exposure that the RealPage litigation has created.

Step 1: Audit Your Pricing Software

Contact every software vendor you use for rent pricing and ask these specific questions:

1. Does your platform use nonpublic rental data from other landlords or property managers to generate pricing recommendations?
2. Is the pricing algorithm shared across multiple subscribers who manage competing properties?
3. Can I opt out of data sharing while still using the platform's pricing features?
4. Has the platform been modified to comply with California AB 325 and the RealPage DOJ settlement requirements?
5. Will you provide a written statement confirming that your pricing tool does not meet the "common pricing algorithm" definition under Section 16729?

Get the answers in writing. If a vendor cannot or will not confirm compliance, treat that as a red flag.

Step 2: Document Your Pricing Methodology

Create a written record of how you set rents. This documentation serves as your defense if your pricing is ever questioned. Include:

• The specific data sources you consult (Zillow, Apartments.com, MLS, your own vacancy history)
• How you adjust for unit-specific factors (upgrades, location within the complex, lease term)
• Any software tools used and their data sources
• The date and rationale for each rent change

If you are a first-time California landlord, building this habit early protects you as regulations continue to tighten.

Step 3: Separate Your Competitive Intelligence

You can still research what comparable properties charge. That is normal market analysis. But do it using public sources:

• Zillow, Redfin, Apartments.com, and Craigslist listings
• Census Bureau American Community Survey rent data
• HUD Fair Market Rents (published annually)
• Your own portfolio's historical performance

What you should avoid: sharing your private rent data with competitors (even informally), joining landlord groups where members share specific rent amounts for the purpose of coordinating pricing, or using tools that aggregate private data from competing properties.

Step 4: Review Your Property Management Agreement

If you work with a property management company, review the property management agreement to understand how they set rents on your behalf. Ask whether the PM company uses any revenue management software that pools data across client properties. A professional PM should be able to explain their pricing methodology clearly and confirm AB 325 compliance.

Pro Tip: The Placer and Sacramento rental pricing guide covers how to set competitive rents using public data sources and local market knowledge -- the exact approach that AB 325 protects. Bookmark it as your reference for compliant rent-setting.

How AB 325 Plays Out in Practice: Two Scenarios

Legal analysis is most useful when grounded in real-world situations. Here are two scenarios that illustrate the boundary between compliant and non-compliant rent pricing in the Sacramento and Placer County market.

Scenario 1: The Roseville Duplex Owner Using Public Comps

David owns a duplex near downtown Roseville. When a lease expires, he checks Zillow and Apartments.com for comparable two-bedroom rentals within a one-mile radius, reviews HUD Fair Market Rents for Placer County, looks at his own vacancy and turnover history, and sets rent at $2,250 based on this analysis.

AB 325 status: Fully compliant. David uses public data, his own records, and independent judgment. No common pricing algorithm is involved.

Scenario 2: The Sacramento Multifamily Operator Using Enterprise RMS

A property management company manages 200 units across Sacramento. They subscribe to an enterprise revenue management system that ingests private rent data from 15 other large operators in the market. The software generates daily rent recommendations based on this pooled competitor dataset. The PM accepts the recommendations for 85% of their units without modification.

AB 325 status: High risk. The software meets the "common pricing algorithm" definition -- two or more users, competitor data, price influence. The high acceptance rate could also support a coercion claim under Section 16729(b) if the software discourages overriding its recommendations.

The difference between these two scenarios is not the act of setting rent -- both landlords are doing that. The difference is the data source and the mechanism. Public data plus independent judgment is market competition. Private data pooled through a shared algorithm is potential collusion.

How AB 325 Interacts With AB 1482 Rent Caps

California landlords already operate under AB 1482's rent cap (5% plus CPI or 10%, whichever is lower). AB 325 adds a separate layer of regulation that operates independently.

AB 1482 limits how much you can raise rent. AB 325 regulates how you determine what to charge. A landlord can be fully compliant with AB 1482's rent cap while still violating AB 325 if they used a prohibited pricing algorithm to arrive at the number.

Consider this example: a landlord uses a common pricing algorithm that recommends a 4% rent increase -- well within AB 1482's cap. The increase is legal under rent control. But if the algorithm used pooled competitor data to generate that recommendation, the method of arriving at 4% may violate AB 325's antitrust provisions. The amount is fine; the process is the problem.

This is why documentation matters. You need to show not just that your rent increase complied with California's rent increase rules, but that the pricing methodology itself was clean.

What Sacramento and Placer County Landlords Should Do Now

AB 325 has been in effect since January 1, 2026. If you have not reviewed your pricing tools and processes, now is the time. Here is a prioritized action list:

1. Audit pricing software this week. Send the five questions from the compliance checklist above to every vendor you use for rent pricing. Get written responses.
2. Document your rent-setting process. Write down how you determine rents -- sources, tools, adjustments, rationale. Keep this on file.
3. Switch to compliant tools if needed. If your current software uses pooled competitor data, switch to a tool that relies on public data and your own portfolio data. Options like Buildium, AppFolio, and Rentec Direct offer pricing features based on public market data.
4. Stop sharing private rent data with competitors. This includes informal landlord meetups, Facebook groups, or email chains where members share specific rent amounts for the purpose of coordinating prices.
5. Consult an attorney if you used RealPage or similar platforms. If you previously used RealPage's revenue management software or any tool that pooled competitor data, consult a California antitrust attorney to assess your exposure.
6. Brief your property manager. If you use a PM company, confirm they understand AB 325 and have updated their pricing protocols. Ask for written confirmation of compliance.

For landlords managing properties across Sacramento and Placer County, the rise of AI in property management makes this audit especially important. AI-powered tools are proliferating, and the line between "helpful analysis" and "common pricing algorithm" can be thin.

How Professional Property Managers Are Adapting to AB 325

Professional property management companies in the Sacramento and Placer County market are already updating their operations in response to AB 325. Here is what responsible adaptation looks like:

• Software audits: Reviewing all pricing tools for compliance with the "common pricing algorithm" definition and requesting written confirmation from vendors
• Data source documentation: Maintaining clear records showing that rent recommendations are based on public data, portfolio-specific data, and local market expertise -- not pooled competitor information
• Pricing methodology transparency: Providing property owners with clear explanations of how rents are determined, including the specific data sources and analytical methods used
• Legal review: Having antitrust counsel review pricing processes and software contracts for Cartwright Act compliance
• Staff training: Ensuring leasing teams and property managers understand what data they can and cannot share with competitors or industry peers

This is one of the growing list of compliance requirements that makes hiring a professional property manager increasingly valuable for California landlords. The regulatory landscape is not getting simpler. AB 325 adds antitrust compliance to a list that already includes fair housing laws, tenant screening regulations, lease agreement requirements, and the annual updates tracked in our 2026 California rental law guide.

At Lifetime Property Management, we set rents for our Roseville and Placer County clients using our own portfolio data, public market comps, and local expertise from managing properties across the region for years. We do not use shared algorithmic pricing platforms that pool competitor data. Contact us to learn how we handle rent pricing for our managed properties.

Frequently Asked Questions About AB 325 and Rent Pricing Algorithms

Does AB 325 ban all rent pricing software in California?

No. AB 325 targets "common pricing algorithms" that use nonpublic competitor data across two or more users to influence pricing. Software that analyzes your own portfolio data, public market listings, or government-published rent statistics is not affected. The California Apartment Association has confirmed this distinction.

Can I still check what other landlords charge for rent and adjust my prices?

Yes. Using publicly available listing data from sites like Zillow, Apartments.com, or Craigslist to set competitive rents is normal market behavior, not antitrust collusion. AB 325 targets the pooling of private, nonpublic data through shared algorithms -- not individual market research using public sources.

What are the penalties for violating AB 325?

Under the enhanced Cartwright Act penalties (companion bill SB 763), corporations face fines up to $6 million per violation, individuals face fines up to $1 million per violation, and the California AG or district attorneys can seek civil penalties of up to $1 million per violation. Penalties are cumulative with other remedies.

Does AB 325 apply to small landlords with just one or two rental properties?

Technically, AB 325 applies to anyone who uses a "common pricing algorithm" as defined by the law. In practice, small landlords who set rent based on public comps and their own judgment face no AB 325 risk. The law targets the shared technology platform, not the size of the landlord.

How does AB 325 relate to the RealPage lawsuit?

AB 325 was written in response to the same concerns that drove the DOJ's antitrust case against RealPage. The federal case targeted one company; AB 325 establishes a state-level legal framework that applies to any shared pricing algorithm in any industry, including rental housing. The two are complementary: federal enforcement addresses RealPage specifically, while AB 325 gives California courts and prosecutors tools to address algorithmic pricing collusion broadly.

I use a property management company -- am I responsible for their pricing tools?

As the property owner, you can be held liable for antitrust violations committed on your behalf. This is why reviewing your property management agreement and confirming your PM's pricing methodology is essential. Ask for written confirmation that they do not use common pricing algorithms as defined by AB 325.