RUBS vs. submetering: how multifamily utilities get billed back
If you operate apartments in the United States, utilities are one of your largest controllable expenses — and one of the easiest to leak. Water, sewer, trash, gas and electricity arrive as a handful of large master bills, and your job is to recover as much of that cost from residents as the law and your leases allow. Two methods dominate: RUBS and submetering.
RUBS: ratio utility billing
RUBS (Ratio Utility Billing System) allocates a master utility bill across residents using a formula rather than a physical meter. Common factors include occupancy (number of residents), unit square footage, number of bedrooms, or a blend. A pool, leasing office, and irrigation are typically carved out as a common-area deduction before resident allocation.
RUBS is inexpensive to deploy — no meters to install — and works well for water and sewer, where individual metering is often impractical. The trade-off is precision: a resident pays based on a proxy for usage, not the usage itself, which can invite pushback and is regulated differently state to state.
Submetering: meter-level billing
Submetering installs a meter per unit so residents pay for exactly what they consume. It is the gold standard for fairness and tends to reduce overall consumption because usage is visible. It is most common for electricity and increasingly for water in newer construction. The cost is up-front capital and ongoing meter maintenance.
Which should you use?
- Electricity — usually submetered or billed directly by the retail provider per unit, especially in deregulated markets like Texas.
- Water & sewer — frequently RUBS, governed by state submetering and allocation rules (for example, the Texas Administrative Code, Subchapter H).
- Trash, drainage, gas — often flat fees or RUBS, depending on the asset and jurisdiction.
The part everyone underestimates
Whichever method you use, the bill still has to be reconciled: the dollars you push back to residents plus the dollars the owner absorbs must equal the master invoice. With one electric master bill carrying hundreds of per-unit meters, that reconciliation is where hours disappear and errors creep in — vacant meters billed to residents, common-area meters mis-posted, totals that drift by a few dollars.
That last mile — matching every meter to its unit, classifying occupied vs. vacant vs. common-area, posting to the right GL account, and balancing to the cent — is exactly what UtiliBox automates.