Utility submetering in Phoenix Arizona is the practice of installing individual water, electric, or gas meters for each unit in a multi-tenant building so each tenant is billed for actual usage instead of paying a flat fee built into rent. Submetering in Arizona is regulated by the Arizona Corporation Commission (ACC) under rules R14-2-409 (water) and R14-2-209 (electric), and authorized for residential rentals by Arizona Revised Statutes Section 33-1314.01. The City of Phoenix Water Services provides the master meter to the property, the property owner or a submetering service installs unit-level meters downstream, and Arizona law requires landlords to pass through the utility's rates without markup and to disclose submetering in the lease.
Submetering has grown across Phoenix and the broader Maricopa County metro because the region's water stress, the high cost of conservation programs, and the rising rate at which apartment owners are billed by City of Phoenix Water Services make per-unit billing materially cheaper than included-water leases. For property owners, submetering shifts water cost behavior to the tenant who controls the usage. For tenants, it creates a real incentive to fix a running toilet or shorten a shower. For Phoenix Water Services, it reduces aggregate residential demand without requiring direct customer-by-customer rate signals.
This guide walks through who regulates submetering in Phoenix, what Arizona law requires of landlords and submetering service providers, and what to evaluate in a billing platform that handles multifamily and master-metered properties. Water utilities, submetering service providers, and property management companies running a billing operation that has to scale across hundreds or thousands of submetered units should look at SMART360 for water utilities, which is purpose-built for the 3,000 to 100,000-connection segment and handles sub-account billing natively.
Four bodies shape what a Phoenix property can do when it submeters water, electric, or gas to tenants. Most operational questions land at the ACC and the city utility.
Is your property subject to ACC submetering rules?
If the property is master-metered by City of Phoenix Water Services and the landlord is billing tenants separately for water based on submeter readings, the answer is yes. ACC rules apply whether the landlord operates submetering directly or contracts with a third-party submetering service. Single-family rentals where each unit has its own City of Phoenix meter are not subject to ACC submetering rules because each tenant is the direct customer of the city utility. Properties that include water in rent without separate billing are not submetering at all; they are simply absorbing the utility cost as part of operating expense.
For utilities and submetering operators that work across multiple Arizona jurisdictions, a regulatory compliance software platform centralizes evidence, automates report generation, and keeps the audit trail intact whether the requirement comes from the ACC, the city, or county environmental services.
Phoenix multifamily properties bill water to tenants in one of three ways. The model the property uses determines almost every other operational decision, including which regulator has authority over the billing.
The ACC's authority is strongest over true submetering because the property is acting like a utility billing customers based on measured consumption. RUBS is treated more like a lease term than a utility billing relationship, which is why ACC rules and disclosure obligations are lighter. For utilities and submetering service providers building a Phoenix-area book of business, the regulatory and software-feature requirements for true submetering are noticeably heavier than for RUBS.
Phoenix submetering compliance is anchored in five core regulatory references. Compliance officers, property managers, and billing teams should be able to locate each one without searching.
The full Arizona Revised Statutes are published at the Arizona Legislature website. ACC orders and dockets are searchable at the ACC eDocket system.
Are you charging only what the utility charged?
The Arizona statutes and ACC rules are clear: a Phoenix landlord or submetering service provider may not mark up the utility's rate. The tenant's bill must reflect the pass-through cost of consumption plus a permitted administrative fee, not a profit margin on the water itself. Tenants who suspect markup can file complaints with the ACC, and the ACC has authority to order refunds and impose penalties. Billing platforms that cannot cleanly separate utility cost from administrative fees create compliance risk every billing cycle.
A submetering rollout at a Phoenix multifamily property typically runs 60 to 120 days from initial decision to first billed cycle. Here is the path.
The reporting and audit-trail burden under ACC submetering rules is heavier than most property managers expect. Submetered properties have to retain meter test records, billing history, disconnect and reconnect logs, and tenant complaint records for the periods specified in R14-2-409. Properties that built their billing operation around spreadsheets often find the ACC record-keeping requirements harder than the rollout itself.
The combination of ACC pass-through rules, ARS lease disclosure requirements, and the practical reality of managing hundreds of submeter accounts inside a property raises the bar on what a billing platform must do. The criteria that matter most for Phoenix submetering operations:
SMART360 by Bynry is built on this architecture. It supports master-meter plus sub-account billing as a native pattern, applies pass-through tariffs without markup, and gives tenants a portal and mobile-first payment experience that meets ACC disclosure requirements. The credibility check: Island Water Authority deployed SMART360 in 10 weeks and achieved a 47% operational cost reduction, a 92% reduction in billing errors, and a 22% improvement in customer satisfaction. Every utility that has gone live on the platform is still on it.
Phoenix submetering operators frequently discover that the aggregate of unit-level submeter readings does not match the master meter total. The gap is the property's internal non-revenue water: leaks in shared lines, irrigation taps that were never accounted for, unauthorized use, or meter inaccuracy in one of the unit meters. Tracking this gap each billing cycle is the operational mechanism that converts submetering from a billing tool into a leak-detection tool. For the technical detail on how non-revenue water reduction works at scale, see our guide on NRW smart leak management for water utilities.
The Arizona Corporation Commission (ACC) regulates utility submetering in Phoenix under Arizona Administrative Code R14-2-409 for water and R14-2-209 for electric. The ACC sets billing format requirements, pass-through pricing rules, record-keeping standards, and meter accuracy testing intervals. The City of Phoenix Water Services regulates the master meter and master account but does not regulate the submetering relationship between landlord and tenant. Arizona Revised Statutes Section 33-1314.01 authorizes residential landlords to submeter water service with proper lease disclosure.
No. Arizona Revised Statutes Section 33-1314.01 and ACC rule R14-2-409 require Phoenix landlords and submetering service providers to bill tenants only at the utility's actual rate as a pass-through cost. A permitted administrative fee may be charged separately and must be shown as a distinct line item on the bill. Marking up the water rate itself is not allowed. Tenants can file complaints with the ACC if they suspect markup, and the ACC can order refunds and impose penalties.
True submetering installs a physical meter on each unit and bills tenants based on measured consumption. RUBS, or Ratio Utility Billing System, allocates the master bill across units by a formula such as square footage, occupant count, or fixture count without unit-level measurement. Both are legal in Phoenix with proper lease disclosure, but submetering creates a stronger tenant incentive to conserve water and is more heavily regulated by the ACC because the property is effectively acting as a utility. RUBS is regulated more lightly because no metering claim is made.
Phoenix does not currently mandate submetering in new multifamily construction. The City Council and Phoenix Water Services have studied submetering mandates as part of broader water conservation policy, but no requirement has been adopted as of 2026. Property owners electing to submeter still must comply with ACC rules, ARS disclosure requirements, and the city's master meter and cross-connection standards.
A typical submetering rollout at a Phoenix multifamily property runs 60 to 120 days from initial decision to first billed cycle. Plumbing audit, lease updates, meter installation, billing system configuration, and a 30 to 60-day parallel billing run account for most of the time. Older buildings with stacked plumbing can take longer if plumbing modifications are required. Newer apartment construction is almost always submetering-ready and rolls out toward the faster end of the range.
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