Utility submetering is the practice of installing an individual meter on each rental unit in a building that has only one master utility meter, so each tenant is billed for the water, electricity, or gas they personally use instead of splitting one combined bill. The property owner still receives the master bill from the utility company, but a submeter on every unit lets the owner (or a third-party billing company) measure each tenant’s consumption and invoice them separately. Federal studies have found that water submetering alone cuts consumption by about 15 percent in multifamily buildings, which is a large part of why owners install it and why regulators pay attention to how it’s billed.
How Submetering Works
Every submetered building begins with the utility company’s master meter, which records total consumption for the whole property. Downstream from that, individual submeters are placed on the lines serving each unit. Water submeters sit on the main intake valve feeding the apartment. Electric submeters use current transformers clamped around the unit’s wiring. Gas submeters rely on flow sensors in the gas line.
No one walks the halls with a clipboard. The meters connect to pulse transmitters or radio modules that send consumption data to a central data logger on the property, and billing software pulls the readings automatically each month. The total of all submeter readings can be checked against the master meter to verify that the numbers line up.
Accuracy is regulated. NIST Handbook 44 sets the tolerances for non-utility electricity-measuring systems, including an acceptance tolerance of 1.0 percent at unity power factor.1National Institute of Standards and Technology. NIST Handbook 44 – 2025 State and local weights-and-measures offices often add their own certification requirements, and uncertified hardware can invalidate an entire billing program.
Submetering vs. Ratio Utility Billing
Submetering is not the only way landlords pass utility costs to tenants in master-metered buildings. The main alternative is ratio utility billing, usually called RUBS. Under RUBS, there are no individual meters at all. The building’s total utility bill is divided among tenants using a formula based on things like unit size, bedroom count, or number of occupants.
The practical difference matters. A submetered tenant can lower their bill by using less. A RUBS tenant pays a formula-based share that has little to do with personal habits, so a careful household subsidizes a wasteful one. RUBS also tends to attract less regulatory oversight than submetering, which in most states is governed by specific landlord-tenant statutes or utility commission rules that cap fees, require disclosures, and set accuracy standards.
What Landlords Can and Can’t Charge
No single federal statute governs utility submetering across all rental housing. The rules are a patchwork of state laws, local ordinances, and federal regulations that apply only to specific property types. A few principles are consistent almost everywhere.
The Rate Cap
A landlord cannot charge a tenant more per unit of water or electricity than the landlord pays the utility company. This appears in state statutes nationwide and in federal regulations for subsidized housing. The landlord may bill for what you used, but at the utility’s rate, not a marked-up one.
Administrative Fees
Administrative fees for running the billing program are capped separately. Under federal rules for low-income housing tax credit properties, the cap is five dollars per month per unit across all submetered utilities. State caps outside that program vary widely, from about a dollar per unit per month in some places to percentage-based formulas in others.
Disclosure Before You Sign
Most states with submetering statutes require landlords to tell tenants in writing, before lease signing, that utilities will be billed separately. Typical requirements include an estimate of typical monthly costs, due dates and payment procedures, and contact information for billing questions. Some states specify minimum font sizes. If a lease doesn’t disclose a submetering arrangement up front, that’s usually a problem for the landlord, not the tenant.
Penalties for Overcharging
Landlords who overcharge or ignore disclosure rules face remedies that vary by jurisdiction. Common consequences include mandatory restitution of overcharged amounts, multiplied damages or per-violation fines in some states, and suspension of the landlord’s authority to submeter until equipment is recertified or practices are corrected.
Subsidized Housing Rules
Two sets of federal rules add requirements on top of state law when the property receives government assistance.
Low-Income Housing Tax Credit Properties
Buildings financed with low-income housing tax credits must follow 26 CFR 1.42-10. Billing has to reflect actual consumption measured by the submeter, the rate charged tenants cannot exceed what the owner pays the utility company, and administrative fees cannot exceed five dollars per month across all submetered utilities for a given unit.2eCFR. 26 CFR 1.42-10 – Utility Allowances If the property generates its own energy from renewable sources, the rate charged to tenants cannot exceed the highest rate a local utility would have charged for the same energy.3Federal Register. Utility Allowances Submetering
The five-dollar fee cap has teeth beyond the fee itself. Anything above that counts as gross rent for purposes of the program’s income limits, which can jeopardize the owner’s tax credits.
Public Housing
Public housing authorities that submeter (often called checkmetering) operate under 24 CFR 965. The structure is different from private-market submetering. Each household receives a utility allowance representing expected consumption. Tenants who go over the allowance pay for the excess at the housing authority’s average utility rate. Tenants who use less than their allowance are not reimbursed for the difference. Housing authorities must review utility allowances at least once a year and adjust them whenever rates change by 10 percent or more since the last adjustment.4U.S. Department of Housing and Urban Development. Public Housing Occupancy Guidebook – Utilities
Tenant Rights When Something Goes Wrong
Shutoffs for Nonpayment Are Mostly Off the Table
What happens if you don’t pay a submetered bill? In theory the landlord could shut off service. In practice most states restrict or effectively prohibit disconnection, especially for water and heat. A HUD study of submetering in federally funded housing found that building managers were generally unwilling to disconnect service for nonpayment, both because of legal restrictions and because of the practical consequences of leaving a unit without water or electricity. The study found that in some properties nonpayment carried “virtually no consequences” for residents because management wouldn’t pursue disconnection.5HUD User. Study of Submetering in HUD-Funded Housing
That reality cuts both ways. Tenants rarely face an immediate shutoff over a disputed bill, but landlords still owe the full master meter bill to the utility company. The landlord’s practical recourse is to treat nonpayment as a lease violation, apply late fees if the lease allows, and ultimately pursue eviction.
Contesting a Bill
If a submetered bill looks wrong, start by notifying the landlord or third-party billing company in writing. Many state regulations require prompt investigation and written records of complaints. While a dispute is pending, most regulatory frameworks protect you from disconnection as long as you keep paying the portion of the bill you aren’t contesting. If the landlord doesn’t resolve the issue, some states let tenants escalate to the state utility commission or a similar regulator. A common record-retention requirement is three years, so billing and consumption records should be available on request.
What It Costs to Install
Costs depend heavily on how the building was plumbed and wired in the first place. When each unit already has separated supply lines, a water submeter typically runs about $100 to $300 per unit including basic installation. When plumbing has to be reworked to isolate each unit’s supply, the cost climbs quickly, and in older buildings the plumbing modifications can dwarf the meter itself.
Electric submetering is usually less disruptive, since most apartment buildings already have individual electrical panels for each unit. The meter hardware and current transformers are relatively inexpensive, and installation goes faster than it does for water.
Retrofits are the hardest case. Many older buildings route water through shared vertical risers that serve multiple units on different floors, which makes per-unit metering impossible without rerouting pipes through walls and ceilings. Space constraints, aging wiring, and historical-building restrictions can add further complications. Wireless meter-reading has eased one part of the problem: meters with built-in radio transmitters can report to a central receiver without new communication wiring, even when the plumbing work still requires opening walls.
Beyond hardware and installation, owners should expect ongoing costs for the central data system, software licensing, and third-party billing service fees if the invoicing is outsourced. Those recurring fees are typically charged per unit per month.
Billing, Vacancies, and Taxes
Once a system is running, the monthly cycle is predictable. The data logger collects readings on a fixed date, billing software calculates each unit’s share of the master bill at the utility’s rate, allowable administrative fees are added, and invoices go out by portal or mail. Payment terms usually give tenants 15 to 30 days.
Vacant Units
Empty units create an allocation question. A submeter in a vacant apartment should read near zero, but the master bill still includes fixed charges from the utility that don’t disappear when a unit sits empty. The general rule is that tenants shouldn’t absorb any portion of charges tied to vacant units. Fixed charges and base fees for unoccupied space stay with the owner. Some lease addendums spell this out by requiring that base and customer service charges for vacant units be deducted before costs are allocated to occupied units. A lease that doesn’t address vacant-unit allocation is a lease worth updating before a dispute surfaces.
How the IRS Treats Reimbursements
Owners who collect submetered utility payments from tenants need to know how those payments are taxed. The IRS treats tenant payments of landlord expenses as rental income, even when the money reimburses a utility bill rather than paying rent.6Internal Revenue Service. Topic No. 414, Rental Income and Expenses The full utility bill is reported as a rental expense on Schedule E, and the tenant reimbursements are reported as rental income. When collections fall short because of vacancies or nonpayment, the unreimbursed portion is still deductible as a rental expense.7Internal Revenue Service. Rental Income and Expenses – Real Estate Tax Tips Administrative fees collected from tenants follow the same pattern: fee income on one line, third-party billing company payments as a deductible operating expense on another.
Does It Actually Reduce Consumption
The conservation case for submetering is simple: people use less when they pay for what they use. A federal analysis published in the Federal Register found that water submetering produced statistically significant savings of 15.3 percent, or about 21.8 gallons per day per unit, compared with properties that didn’t submeter.8Federal Register. Promoting Water Conservation in Multi-Family Housing Separate studies of electric submetering have found average savings around 10 percent over the first several years after installation, with the largest reductions in the first year and smaller but durable savings after that.
For owners, the effect works two ways: the master bill shrinks, and remaining consumption gets billed to the tenants who caused it. For tenants, submetering gives both an incentive to use less and the information to act on it, which is the feature that separates it from RUBS or utilities-included rent, where personal habits and personal costs never meet.