Sharing Utility Bills at Your Apartment? Colorado is Setting New Rules.

The Bottom Line

If you live in or manage an apartment building that splits a single master utility bill among its tenants, this new law lays down strict ground rules for how that math works. Landlords can still divide the bill, but they cannot upcharge you, and they absolutely have to subtract the cost of lighting up the lobby or watering the shared lawn first. It is basically a financial transparency mandate for shared utilities.

What This Bill Actually Does

If you live in an older apartment building, townhome complex, or duplex, there is a good chance the entire property only has one master meter for water, gas, or electricity. Because the utility company cannot tell how much water unit 3B used compared to unit 4A, landlords often use a mathematical formula to split the single bill among all the residents. This is known as a Ratio Utility Billing System (RUBS). Recently, Colorado passed laws cracking down on junk fees in rental agreements, which inadvertently created a gray area: was splitting a master utility bill considered an illegal fee? HB26-1013 clears the air, officially giving landlords the green light to use these systems—but only if they stay within a strict set of consumer protection guardrails.

The core purpose of the bill is to ensure landlords cannot use the monthly utility bill as a hidden profit center. The law explicitly states that the aggregate amount billed to all tenants cannot exceed the total amount charged by the utility provider. If the local water company charges the building $1,000 for the month, the landlord can only collect exactly $1,000 across all their tenants.

To enforce this transparency, the legislation lays out four specific requirements that property owners must follow to legally use a ratio billing system:

• Zero Markups: Landlords are strictly prohibited from adding any markup, surcharge, or administrative fee on top of the actual utility cost.
• Common Area Carve-Outs: The utility costs for common areas or shared facilities (like hallway lighting, leasing office heating, or landscaping sprinklers) must be calculated and entirely excluded from the tenants' share of the bill.
• Cap on Total Billing: The sum of all tenant bills cannot mathematically exceed the master invoice from the utility provider.
• Clear Disclosures: The exact formula used to split the bill must be clearly and conspicuously disclosed in the tenant's rental agreement or lease addendum.

What It Means for You

If you rent an apartment or house that does not have its own dedicated utility meter, this law acts as a direct shield for your wallet. You no longer have to wonder if your property manager is skimming a little extra off the top of your monthly water or heating bill just to pad their bottom line. Because the law strictly forbids any administrative fees or markups, the amount you pay is now tethered directly to what the utility company actually charges the building. It turns your utility bill into a true pass-through cost, rather than an arbitrary monthly charge.

The biggest day-to-day difference for many renters will be the new requirement surrounding shared facilities. In the past, it was not uncommon for tenants to unknowingly subsidize the cost of heating a shared swimming pool, keeping the leasing office's air conditioning cranked up, or watering expansive shared lawns. Now, your landlord is legally required to carve those expenses out of the equation before dividing the remainder among the units. If you live in a building with extensive shared amenities, this simple math change could noticeably lower your share of the monthly utilities.

Take a close look at your lease agreement the next time you renew. Under these rules, your landlord must clearly and conspicuously disclose exactly how your slice of the utility pie is calculated. Are they basing it on your apartment's square footage? The number of bedrooms? The number of occupants? Make sure that addendum is attached and makes sense to you. If you suspect your landlord is inflating the bill or making you pay for the lobby's electricity, violations of this law fall under the Colorado Consumer Protection Act, meaning you have the right to file a deceptive trade practice complaint directly with the state Attorney General.

What It Means for Your Business

For property managers, landlords, and real estate investors, this bill resolves a major headache caused by recent legislation surrounding rental fees. You now have explicit statutory permission to use a Ratio Utility Billing System (RUBS) to allocate master-metered utilities. This is a massive relief for owners of older multi-family properties where retrofitting the building with individual sub-meters is structurally difficult or financially impossible. However, this explicit permission comes with strict operational and accounting requirements that will likely require you to update your standard operating procedures.

First, you must audit how you calculate shared utilities. You can no longer simply divide 100% of a building's master utility bill among the tenants if that building includes common areas or shared facilities. You will need a defensible, documented methodology to estimate and deduct the cost of lighting common hallways, watering shared lawns, and operating onsite laundry facilities before you apply the RUBS formula to the remaining balance. Additionally, you must completely strip away any administrative fees, surcharges, or markups related to the utility billing itself.

To ensure your business remains compliant, take the following steps:

• Update Lease Templates: Ensure that your specific method of utility allocation is clearly and conspicuously disclosed in all new rental agreements and renewal addendums.
• Audit Third-Party Vendors: If you use a third-party billing company to manage your RUBS, verify that their software is fully compliant with Colorado's new common-area deduction and zero-markup requirements.
• Document Common Area Math: Keep clear records of how you determine the utility cost for shared facilities, as you may need to prove you are successfully excluding those costs from tenant bills.

The enforcement mechanism here has real teeth. Violating these rules is legally considered a deceptive trade practice under the Colorado Consumer Protection Act, which carries civil penalties of up to $20,000 per violation. Ensuring your math is clean and your leases are updated is the best way to protect your business from liability.

Follow the Money

From a state budget perspective, this bill is highly efficient—it does not require any new taxpayer funding or state appropriations to implement. The Department of Law may experience a slight bump in workload if tenants start filing deceptive trade practice complaints against landlords who aren't playing by the new rules, but the state expects to handle those investigations within its existing operating budget. Similarly, the Department of Local Affairs (DOLA) might need to slightly adjust some of its rental assistance voucher calculations to match the new, more transparent billing formulas, but no new state money is required for that administrative tweak.

The only financial wild card is potential state revenue generated from civil penalties. Because violations trigger the Colorado Consumer Protection Act, landlords who are caught intentionally overcharging tenants or hiding administrative fees could face steep fines of up to $20,000 for each individual violation. That money would flow into the state as damage awards. However, state fiscal analysts are not banking on a specific dollar amount in the budget, as they operate under the assumption that the vast majority of property managers will simply adjust their practices and comply with the law.

Where This Bill Stands

HB26-1013 is currently Signed Into Law. The latest official action came on 03/26/2026: Governor Signed.

That means the legislative process is complete and the bill is now law. The remaining questions are about implementation timing and how agencies, businesses, or local governments respond.