Free calculator
Utility bill split calculator
Divide one shared utility bill across units — evenly, or weighted by occupancy. A simple RUBS-style split. Enter the total bill and choose how to allocate it.
The short answer
Last updated: July 2026
A utility bill split divides one master-metered bill across units, either evenly or weighted by a factor like occupancy — a simple RUBS-style allocation. A $480 bill across four units is $120 each evenly; by occupancy, a unit with 2 of 8 residents owes about $120. Billing tenants for utilities is regulated in some areas. This estimate uses your inputs.
After the estimate:
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Divide a shared utility bill fairly.
Split one master utility bill across units — evenly, or weighted by occupancy (a simple RUBS-style allocation). Enter the total bill and choose how to divide it.
Total utility bill
$
Split method
Even split
By occupancy
Number of units
4
Input-driven result
Your inputs
Formula
Result below
Per-unit share
$120.00
$480 split evenly across 4 units.
Total split
$480.00
Per-unit share × units — sums back to the full bill.
Bill allocation across units
Each unit
$120.00
Whole bill
$480.00
Estimate based on your inputs. Not a promise of results.
Estimate only. Billing tenants for a share of a master-metered utility (a RUBS arrangement) is regulated in some states and cities, and lease terms govern what you can pass through. Check your local rules before billing.
How it works
How this tool works.
When a building shares one utility meter, the bill still has to be divided fairly among the units. The two most common approaches are an even split and a split weighted by occupancy, on the logic that more residents use more water, gas, or electricity. Both are forms of a ratio utility billing system, or RUBS.
Enter the total bill and pick a method — even, or by occupancy — and this calculator estimates each unit’s share. It’s arithmetic on your inputs; whether and how you can bill tenants for utilities depends on your lease and local rules.
Make the result useful
Utility-bill allocation
Total bill is the master-meter or shared invoice being allocated.
Split method is the agreed equal-unit or occupancy-weighted approach.
Unit or occupant counts must cover the same bill period.
The output should reconcile back to the whole bill after rounding.
Calculation lens
equal share = bill ÷ units; occupancy share = bill × unit occupants ÷ total occupants
Use the output as a documented scenario result, not a guarantee.
Does not determine whether pass-through billing is allowed.
Questions landlords ask
Questions about this tool and its limits.
Built by a landlord who's done every one of these jobs by hand.
Aptoria was built by an owner-operator managing a Brooklyn portfolio — the 11pm calls, the awkward rent texts, the April receipt-pile — not by a software team guessing at the problem.
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